Cellular Therapy

SAN DIEGO — Fewer than half of the cancer drugs approved under the US Food and Drug Administration’s (FDA’s) accelerated approval pathway between 2013 and 2017 have been shown to improve overall survival or quality of life, despite being on the US market for more than 5 years, according to a new study. 

Under the program, drugs are approved for marketing if they show benefit in surrogate markers thought to indicate efficacy. Progression-free survival, tumor response, and duration of response are the most used surrogate markers for accelerated approvals of cancer drugs. These are based largely on imaging studies that show either a stop in growth in the case of progression-free survival or tumor shrinkage in the case of tumor response. 

Following accelerated approvals, companies are then supposed to show actual clinical benefit in confirmatory trials.

The problem with relying on surrogate markers for drug approvals is that they don’t always correlate with longer survival or improved quality of life, said Edward Cliff, MBBS, who presented the findings at the American Association for Cancer Research 2024 annual meeting (abstract 918). The study was also published in JAMA to coincide with the meeting presentation.

In some cancers, these markers work well, but in others they don’t, said Dr. Cliff, a hematology trainee at Brigham and Women’s Hospital, Boston, when the work was conducted, and now a hematology fellow at the Peter MacCallum Cancer Centre in Melbourne, Australia.

To determine whether cancer drugs granted accelerated approval ultimately show an overall survival or quality of life benefit, researchers reviewed 46 cancer drugs granted accelerated approvals between 2013 and 2017. Twenty (43%) were granted full approval after demonstrating survival or quality-of-life benefits. 

Nine, however, were converted to full approvals on the basis of surrogate markers. These include a full approval for pembrolizumab in previously treated recurrent or refractory head and neck squamous cell carcinoma and a full approval for nivolumab for refractory locally advanced or metastatic urothelial carcinoma, both based on tumor response rate and duration of response.

Of the remaining 17 drugs evaluated in the trial, 10 have been withdrawn and seven do not yet have confirmatory trial results. 

The reliance on surrogate markers means that these drugs are used for treatment, covered by insurance, and added to guidelines — all without solid evidence of real-world clinical benefit, said Dr. Cliff. 

However, the goal should not be to do away with the accelerated approval process, because it sometimes does deliver powerful agents to patients quickly. Instead, Dr. Cliff told this news organization, the system needs to be improved so that “we keep the speed while getting certainty around clinical benefits” with robust and timely confirmatory trials. 

In the meantime, “clinicians should communicate with patients about any residual uncertainty of clinical benefit when they offer novel therapies,” Dr. Cliff explained. “It’s important for them to have the information.”

There has been some progress on the issue. In December 2022, the US Congress passed the Food and Drug Administration Omnibus Reform Act. Among other things, the Act requires companies to have confirmation trials underway as a condition for accelerated approval, and to provide regular reports on their progress. The Act also expedites the withdrawal process for drugs that don’t show a benefit. 

The Act has been put to the test twice recently. In February, FDA used the expedited process to remove the multiple myeloma drug melphalan flufenamide from the market. Melphalan flufenamide hadn’t been sold in the US for quite some time, so the process wasn’t contentious. 

In March, Regeneron announced that accelerated approval for the follicular and diffuse B cell lymphoma drug odronextamab has been delayed pending enrollment in a confirmatory trial. 

“There have been some promising steps,” Dr. Cliff said, but much work needs to be done. 

Study moderator Shivaani Kummar, MD, agreed, noting that “the data is showing that the confirmatory trials aren’t happening at the pace which they should.” 

But the solution is not to curtail approvals; it’s to make sure that accelerated approval commitments are met, said Dr. Kummar.

Still, “as a practicing oncologist, I welcome the accelerated pathway,” Dr. Kummar, a medical oncologist/hematologist at Oregon Health & Science University, Portland, told this news organization. “I want the availability to my patients.” 

Having drugs approved on the basis of surrogate markers doesn’t necessarily mean patients are getting ineffective therapies, Dr. Kummar noted. For instance, if an agent just shrinks the tumor, it can sometimes still be “a huge clinical benefit because it can take the symptoms away.” 

As for prescribing drugs based on accelerated approvals, she said she tells her patients that trials have been promising, but we don’t know what the long-term effects are. She and her patient then make a decision together. 

The study was funded by Arnold Ventures. Dr. Kummar reported support from several companies, including Bayer, Gilead, and others. Dr. Cliff had no disclosures. 
 

A version of this article appeared on Medscape.com.

SAN DIEGO — Fewer than half of the cancer drugs approved under the US Food and Drug Administration’s (FDA’s) accelerated approval pathway between 2013 and 2017 have been shown to improve overall survival or quality of life, despite being on the US market for more than 5 years, according to a new study. 

Under the program, drugs are approved for marketing if they show benefit in surrogate markers thought to indicate efficacy. Progression-free survival, tumor response, and duration of response are the most used surrogate markers for accelerated approvals of cancer drugs. These are based largely on imaging studies that show either a stop in growth in the case of progression-free survival or tumor shrinkage in the case of tumor response. 

Following accelerated approvals, companies are then supposed to show actual clinical benefit in confirmatory trials.

The problem with relying on surrogate markers for drug approvals is that they don’t always correlate with longer survival or improved quality of life, said Edward Cliff, MBBS, who presented the findings at the American Association for Cancer Research 2024 annual meeting (abstract 918). The study was also published in JAMA to coincide with the meeting presentation.

In some cancers, these markers work well, but in others they don’t, said Dr. Cliff, a hematology trainee at Brigham and Women’s Hospital, Boston, when the work was conducted, and now a hematology fellow at the Peter MacCallum Cancer Centre in Melbourne, Australia.

To determine whether cancer drugs granted accelerated approval ultimately show an overall survival or quality of life benefit, researchers reviewed 46 cancer drugs granted accelerated approvals between 2013 and 2017. Twenty (43%) were granted full approval after demonstrating survival or quality-of-life benefits. 

Nine, however, were converted to full approvals on the basis of surrogate markers. These include a full approval for pembrolizumab in previously treated recurrent or refractory head and neck squamous cell carcinoma and a full approval for nivolumab for refractory locally advanced or metastatic urothelial carcinoma, both based on tumor response rate and duration of response.

Of the remaining 17 drugs evaluated in the trial, 10 have been withdrawn and seven do not yet have confirmatory trial results. 

The reliance on surrogate markers means that these drugs are used for treatment, covered by insurance, and added to guidelines — all without solid evidence of real-world clinical benefit, said Dr. Cliff. 

However, the goal should not be to do away with the accelerated approval process, because it sometimes does deliver powerful agents to patients quickly. Instead, Dr. Cliff told this news organization, the system needs to be improved so that “we keep the speed while getting certainty around clinical benefits” with robust and timely confirmatory trials. 

In the meantime, “clinicians should communicate with patients about any residual uncertainty of clinical benefit when they offer novel therapies,” Dr. Cliff explained. “It’s important for them to have the information.”

There has been some progress on the issue. In December 2022, the US Congress passed the Food and Drug Administration Omnibus Reform Act. Among other things, the Act requires companies to have confirmation trials underway as a condition for accelerated approval, and to provide regular reports on their progress. The Act also expedites the withdrawal process for drugs that don’t show a benefit. 

The Act has been put to the test twice recently. In February, FDA used the expedited process to remove the multiple myeloma drug melphalan flufenamide from the market. Melphalan flufenamide hadn’t been sold in the US for quite some time, so the process wasn’t contentious. 

In March, Regeneron announced that accelerated approval for the follicular and diffuse B cell lymphoma drug odronextamab has been delayed pending enrollment in a confirmatory trial. 

“There have been some promising steps,” Dr. Cliff said, but much work needs to be done. 

Study moderator Shivaani Kummar, MD, agreed, noting that “the data is showing that the confirmatory trials aren’t happening at the pace which they should.” 

But the solution is not to curtail approvals; it’s to make sure that accelerated approval commitments are met, said Dr. Kummar.

Still, “as a practicing oncologist, I welcome the accelerated pathway,” Dr. Kummar, a medical oncologist/hematologist at Oregon Health & Science University, Portland, told this news organization. “I want the availability to my patients.” 

Having drugs approved on the basis of surrogate markers doesn’t necessarily mean patients are getting ineffective therapies, Dr. Kummar noted. For instance, if an agent just shrinks the tumor, it can sometimes still be “a huge clinical benefit because it can take the symptoms away.” 

As for prescribing drugs based on accelerated approvals, she said she tells her patients that trials have been promising, but we don’t know what the long-term effects are. She and her patient then make a decision together. 

The study was funded by Arnold Ventures. Dr. Kummar reported support from several companies, including Bayer, Gilead, and others. Dr. Cliff had no disclosures. 
 

A version of this article appeared on Medscape.com.

SAN DIEGO — Fewer than half of the cancer drugs approved under the US Food and Drug Administration’s (FDA’s) accelerated approval pathway between 2013 and 2017 have been shown to improve overall survival or quality of life, despite being on the US market for more than 5 years, according to a new study. 

Under the program, drugs are approved for marketing if they show benefit in surrogate markers thought to indicate efficacy. Progression-free survival, tumor response, and duration of response are the most used surrogate markers for accelerated approvals of cancer drugs. These are based largely on imaging studies that show either a stop in growth in the case of progression-free survival or tumor shrinkage in the case of tumor response. 

Following accelerated approvals, companies are then supposed to show actual clinical benefit in confirmatory trials.

The problem with relying on surrogate markers for drug approvals is that they don’t always correlate with longer survival or improved quality of life, said Edward Cliff, MBBS, who presented the findings at the American Association for Cancer Research 2024 annual meeting (abstract 918). The study was also published in JAMA to coincide with the meeting presentation.

In some cancers, these markers work well, but in others they don’t, said Dr. Cliff, a hematology trainee at Brigham and Women’s Hospital, Boston, when the work was conducted, and now a hematology fellow at the Peter MacCallum Cancer Centre in Melbourne, Australia.

To determine whether cancer drugs granted accelerated approval ultimately show an overall survival or quality of life benefit, researchers reviewed 46 cancer drugs granted accelerated approvals between 2013 and 2017. Twenty (43%) were granted full approval after demonstrating survival or quality-of-life benefits. 

Nine, however, were converted to full approvals on the basis of surrogate markers. These include a full approval for pembrolizumab in previously treated recurrent or refractory head and neck squamous cell carcinoma and a full approval for nivolumab for refractory locally advanced or metastatic urothelial carcinoma, both based on tumor response rate and duration of response.

Of the remaining 17 drugs evaluated in the trial, 10 have been withdrawn and seven do not yet have confirmatory trial results. 

The reliance on surrogate markers means that these drugs are used for treatment, covered by insurance, and added to guidelines — all without solid evidence of real-world clinical benefit, said Dr. Cliff. 

However, the goal should not be to do away with the accelerated approval process, because it sometimes does deliver powerful agents to patients quickly. Instead, Dr. Cliff told this news organization, the system needs to be improved so that “we keep the speed while getting certainty around clinical benefits” with robust and timely confirmatory trials. 

In the meantime, “clinicians should communicate with patients about any residual uncertainty of clinical benefit when they offer novel therapies,” Dr. Cliff explained. “It’s important for them to have the information.”

There has been some progress on the issue. In December 2022, the US Congress passed the Food and Drug Administration Omnibus Reform Act. Among other things, the Act requires companies to have confirmation trials underway as a condition for accelerated approval, and to provide regular reports on their progress. The Act also expedites the withdrawal process for drugs that don’t show a benefit. 

The Act has been put to the test twice recently. In February, FDA used the expedited process to remove the multiple myeloma drug melphalan flufenamide from the market. Melphalan flufenamide hadn’t been sold in the US for quite some time, so the process wasn’t contentious. 

In March, Regeneron announced that accelerated approval for the follicular and diffuse B cell lymphoma drug odronextamab has been delayed pending enrollment in a confirmatory trial. 

“There have been some promising steps,” Dr. Cliff said, but much work needs to be done. 

Study moderator Shivaani Kummar, MD, agreed, noting that “the data is showing that the confirmatory trials aren’t happening at the pace which they should.” 

But the solution is not to curtail approvals; it’s to make sure that accelerated approval commitments are met, said Dr. Kummar.

Still, “as a practicing oncologist, I welcome the accelerated pathway,” Dr. Kummar, a medical oncologist/hematologist at Oregon Health & Science University, Portland, told this news organization. “I want the availability to my patients.” 

Having drugs approved on the basis of surrogate markers doesn’t necessarily mean patients are getting ineffective therapies, Dr. Kummar noted. For instance, if an agent just shrinks the tumor, it can sometimes still be “a huge clinical benefit because it can take the symptoms away.” 

As for prescribing drugs based on accelerated approvals, she said she tells her patients that trials have been promising, but we don’t know what the long-term effects are. She and her patient then make a decision together. 

The study was funded by Arnold Ventures. Dr. Kummar reported support from several companies, including Bayer, Gilead, and others. Dr. Cliff had no disclosures. 
 

A version of this article appeared on Medscape.com.

The US Food and Drug Administration (FDA) has approved idecabtagene vicleucel (ide-cel) (Abecma, Bristol-Myers Squibb/2seventy bio) for adults with relapsed or refractory multiple myeloma after two or more prior lines of therapy, including an immunomodulatory agent, a proteasome inhibitor, and an anti-CD38 monoclonal antibody. 

The approval expands the chimeric antigen receptor (CAR) T-cell therapy’s indications to earlier lines of treatment after exposure to these other main therapy classes, Bristol Myers Squibb said in a press release. 

Approval was based on the KarMMa-3 trial, in which 254 patients were randomly assigned to ide-cel and 132 to investigators’ choice of standard regimens, consisting of combinations of daratumumab, dexamethasone, and other agents. 

After a median follow-up of 15.9 months, median progression-free survival was three times higher in the ide-cel arm: 13.3 months with the CAR T-cell therapy vs 4.4 months with standard treatment. Overall, 39% of patients on ide-cel had a complete response vs 5% on standard regimens. 

The approval includes a new recommended dose range of 300-510 x 106 CAR-positive T cells. 

Ide-cel carries a boxed warning for cytokine release syndrome, neurologic toxicities, hemophagocytic lymphohistiocytosis/macrophage activation syndrome, prolonged cytopenia, and secondary hematologic cancers. 

In trials, cytokine release syndrome occurred in 89% (310 of 349) of patients in the KarMMa-3 and KarMMa studies, which included grade 3 syndrome in 7% (23 of 349) and fatal cases in 0.9% (3 of 349) of patients.

A one-time treatment is over $500,000, according to drugs.com.

A version of this article appeared on Medscape.com.

The US Food and Drug Administration (FDA) has approved idecabtagene vicleucel (ide-cel) (Abecma, Bristol-Myers Squibb/2seventy bio) for adults with relapsed or refractory multiple myeloma after two or more prior lines of therapy, including an immunomodulatory agent, a proteasome inhibitor, and an anti-CD38 monoclonal antibody. 

The approval expands the chimeric antigen receptor (CAR) T-cell therapy’s indications to earlier lines of treatment after exposure to these other main therapy classes, Bristol Myers Squibb said in a press release. 

Approval was based on the KarMMa-3 trial, in which 254 patients were randomly assigned to ide-cel and 132 to investigators’ choice of standard regimens, consisting of combinations of daratumumab, dexamethasone, and other agents. 

After a median follow-up of 15.9 months, median progression-free survival was three times higher in the ide-cel arm: 13.3 months with the CAR T-cell therapy vs 4.4 months with standard treatment. Overall, 39% of patients on ide-cel had a complete response vs 5% on standard regimens. 

The approval includes a new recommended dose range of 300-510 x 106 CAR-positive T cells. 

Ide-cel carries a boxed warning for cytokine release syndrome, neurologic toxicities, hemophagocytic lymphohistiocytosis/macrophage activation syndrome, prolonged cytopenia, and secondary hematologic cancers. 

In trials, cytokine release syndrome occurred in 89% (310 of 349) of patients in the KarMMa-3 and KarMMa studies, which included grade 3 syndrome in 7% (23 of 349) and fatal cases in 0.9% (3 of 349) of patients.

A one-time treatment is over $500,000, according to drugs.com.

A version of this article appeared on Medscape.com.

The US Food and Drug Administration (FDA) has approved idecabtagene vicleucel (ide-cel) (Abecma, Bristol-Myers Squibb/2seventy bio) for adults with relapsed or refractory multiple myeloma after two or more prior lines of therapy, including an immunomodulatory agent, a proteasome inhibitor, and an anti-CD38 monoclonal antibody. 

The approval expands the chimeric antigen receptor (CAR) T-cell therapy’s indications to earlier lines of treatment after exposure to these other main therapy classes, Bristol Myers Squibb said in a press release. 

Approval was based on the KarMMa-3 trial, in which 254 patients were randomly assigned to ide-cel and 132 to investigators’ choice of standard regimens, consisting of combinations of daratumumab, dexamethasone, and other agents. 

After a median follow-up of 15.9 months, median progression-free survival was three times higher in the ide-cel arm: 13.3 months with the CAR T-cell therapy vs 4.4 months with standard treatment. Overall, 39% of patients on ide-cel had a complete response vs 5% on standard regimens. 

The approval includes a new recommended dose range of 300-510 x 106 CAR-positive T cells. 

Ide-cel carries a boxed warning for cytokine release syndrome, neurologic toxicities, hemophagocytic lymphohistiocytosis/macrophage activation syndrome, prolonged cytopenia, and secondary hematologic cancers. 

In trials, cytokine release syndrome occurred in 89% (310 of 349) of patients in the KarMMa-3 and KarMMa studies, which included grade 3 syndrome in 7% (23 of 349) and fatal cases in 0.9% (3 of 349) of patients.

A one-time treatment is over $500,000, according to drugs.com.

A version of this article appeared on Medscape.com.

Among diagnostic interventions recommended to manage the common CAR-T cell therapy–associated side effect of immune effector cell–associated neurotoxicity syndrome (ICANS), only electroencephalogram (EEG) shows significant therapeutic benefit — while magnetic resonance imaging (MRI) and lumbar puncture appear to have limited value, new research shows.

“Our results emphasize for the first time the role of EEG in the current guidelines [for ICANS] but question the need for systematic MRI and lumbar puncture,” reported the authors of the study, published in Blood Advances.

The study underscores that “EEG does more that depict insignificant anomalies and plays a key role in patient management in daily practice,” first author Mattéo Mauget, said in an interview. He is a resident in the intensive care unit at the University Hospital of Rennes in France.

ICANS is among the most common of acute neurotoxicities occurring after CAR T-cell therapy, and international guidelines recommend MRI, lumbar puncture, and EEG in the management of the toxicity, which is typically treated with anti-cytokine therapy and steroids.

However, the guidelines widely vary. All recommend the use of MRI for ICANS grade 3 or higher, but fewer recommend the approach for grade 2. Meanwhile, only some recommend the use of lumbar puncture, and even fewer guidelines recommend the use of EEG.

While these measures are expensive — and in the case of lumbar puncture, invasive and burdensome for patients — the recommendations on these measures “rely on empirical practices and are only based on expert opinions with low scientific evidence,” the authors wrote.

To evaluate the interventions in a cohort of real-life patients treated with CAR T-cell therapy, the authors identified 190 consecutive patients receiving the therapy at the University Hospital of Rennes, France, between August 2018 and January 2023.

Of the patients, 62% were male and their median age was 64. Overall, 91 (48%) developed ICANS.

The majority of patients (73%) received CAR-T cell therapy for a refractory/relapsed (R/R) DLBCL (73%), and most (60%) had received the CAR-T product axicabtagene-ciloleucel (axi-cel) after two or more prior therapies.

While MRI was performed in 78% of patients with ICANS, the measure was determined to have had a therapeutic impact in just 4% of patients, despite common observations of abnormal findings.

Lumbar puncture was meanwhile performed in 47% of patients, resulting in preemptive antimicrobial agents in 7% of patients, with no infection detected.

While systematic EEG was performed in 56% of patients, the intervention led to therapeutic modifications among 16% of those patients.

“Our findings highlight some divergences between guidelines and daily practice regarding diagnostic investigations,” the authors noted.

The study “shows that EEG is the diagnostic investigation with the greatest therapeutic impact, while MRI and lumbar puncture appear to have a limited therapeutic impact,” they concluded.
 

EEG Findings

Of note, only 18% of EEGs in the cohort were normal, ranging from 50% of those with ICANS grade 1 to 6% among those with ICANS grade 4.

Encephalopathy was the most common EEG finding, observed in 45% of patients, while 6 EEGs (12%) showed seizures or status epilepticus.

Two patients with ICANS grade 2 and 3 (6% of EEG) developed seizure or status epilepticus on their EEGs, despite the absence of clinical symptoms of epilepsy, while the rate was 4 (33%) among patients with ICANS grade 4.

Among the eight (16%) patients who received therapeutic modification as the result of the EEG, seven were in the severe and life-threatening ICANS (grade 3+) group (24%).

In addition, all EEGs detecting seizure or status epilepticus resulted in an increase in antiepileptic prophylaxis with levetiracetam or the introduction of a new antiepileptics, mainly phenytoin.

Surprisingly, there were no cases of diffuse edema in the entire cohort, even among those with grade 4 ICANS, which is one of the key concerns of treating physicians managing severe ICANS, the authors noted.

A notable caveat is that EEG can be a time- and physician-consuming examination not easily accessed on a 24/7 daily practice level.

With such challenges, “[we] advocate for a close partnership between hematologists and electrophysiologists to make EEG access as easy as possible for this kind of patient, as EEG is a key game changer in patient course,” Mr. Mauget said.

Commenting on the findings, Marcela V. Maus, MD, PhD, director of the Cellular Immunotherapy Program at the Massachusetts General Hospital Cancer Center in Boston, agreed that the study adds importantly to a topic in need of more data.

“This is a very interesting study that starts to provide data behind the consensus recommendations that were initially made based purely on expert opinion and collective practices,” she said in an interview.

“I think [the EEG findings] are interesting, because EEG is often the most non-specific of these tests, and I would not have predicted this result. I also think that monitoring of cerebral spinal fluid [through lumbar puncture] could have potentially higher impact if there was a way to routinely quantify and detect the CAR-T cells,” Dr. Maus said.

“Although admittedly I think this may be of greater benefit when patients present with neurologic findings outside the typical window of ICANS, such as what can occur with delayed neurologic toxicities such as Parkinsonism after BCMA-directed CAR T cells,” she added.

Senior author Guillaume Manson, MD, a hematologist also with the University Hospital of Rennes, underscored that the results shouldn’t be construed to suggest that MRI or LP should not be used in such cases, but may often not be necessary.

“Every patient’s case is different, and these findings certainly do not say that certain tests should or should not be performed,” he said in a press statement.

“We did this research to generate clinical evidence to inform guidelines that support physicians in making clinical decisions when treating patients with these complex, and sometimes severe conditions,” he added.

Dr. Manson reported relationships with BMS-Celgene, Gilead-Kite, and Takeda. Dr. Maus disclosed ties with Century Therapeutics, TCR2, Kite/Gilead, Novartis, and several other companies in the field of cellular therapies.

Among diagnostic interventions recommended to manage the common CAR-T cell therapy–associated side effect of immune effector cell–associated neurotoxicity syndrome (ICANS), only electroencephalogram (EEG) shows significant therapeutic benefit — while magnetic resonance imaging (MRI) and lumbar puncture appear to have limited value, new research shows.

“Our results emphasize for the first time the role of EEG in the current guidelines [for ICANS] but question the need for systematic MRI and lumbar puncture,” reported the authors of the study, published in Blood Advances.

The study underscores that “EEG does more that depict insignificant anomalies and plays a key role in patient management in daily practice,” first author Mattéo Mauget, said in an interview. He is a resident in the intensive care unit at the University Hospital of Rennes in France.

ICANS is among the most common of acute neurotoxicities occurring after CAR T-cell therapy, and international guidelines recommend MRI, lumbar puncture, and EEG in the management of the toxicity, which is typically treated with anti-cytokine therapy and steroids.

However, the guidelines widely vary. All recommend the use of MRI for ICANS grade 3 or higher, but fewer recommend the approach for grade 2. Meanwhile, only some recommend the use of lumbar puncture, and even fewer guidelines recommend the use of EEG.

While these measures are expensive — and in the case of lumbar puncture, invasive and burdensome for patients — the recommendations on these measures “rely on empirical practices and are only based on expert opinions with low scientific evidence,” the authors wrote.

To evaluate the interventions in a cohort of real-life patients treated with CAR T-cell therapy, the authors identified 190 consecutive patients receiving the therapy at the University Hospital of Rennes, France, between August 2018 and January 2023.

Of the patients, 62% were male and their median age was 64. Overall, 91 (48%) developed ICANS.

The majority of patients (73%) received CAR-T cell therapy for a refractory/relapsed (R/R) DLBCL (73%), and most (60%) had received the CAR-T product axicabtagene-ciloleucel (axi-cel) after two or more prior therapies.

While MRI was performed in 78% of patients with ICANS, the measure was determined to have had a therapeutic impact in just 4% of patients, despite common observations of abnormal findings.

Lumbar puncture was meanwhile performed in 47% of patients, resulting in preemptive antimicrobial agents in 7% of patients, with no infection detected.

While systematic EEG was performed in 56% of patients, the intervention led to therapeutic modifications among 16% of those patients.

“Our findings highlight some divergences between guidelines and daily practice regarding diagnostic investigations,” the authors noted.

The study “shows that EEG is the diagnostic investigation with the greatest therapeutic impact, while MRI and lumbar puncture appear to have a limited therapeutic impact,” they concluded.
 

EEG Findings

Of note, only 18% of EEGs in the cohort were normal, ranging from 50% of those with ICANS grade 1 to 6% among those with ICANS grade 4.

Encephalopathy was the most common EEG finding, observed in 45% of patients, while 6 EEGs (12%) showed seizures or status epilepticus.

Two patients with ICANS grade 2 and 3 (6% of EEG) developed seizure or status epilepticus on their EEGs, despite the absence of clinical symptoms of epilepsy, while the rate was 4 (33%) among patients with ICANS grade 4.

Among the eight (16%) patients who received therapeutic modification as the result of the EEG, seven were in the severe and life-threatening ICANS (grade 3+) group (24%).

In addition, all EEGs detecting seizure or status epilepticus resulted in an increase in antiepileptic prophylaxis with levetiracetam or the introduction of a new antiepileptics, mainly phenytoin.

Surprisingly, there were no cases of diffuse edema in the entire cohort, even among those with grade 4 ICANS, which is one of the key concerns of treating physicians managing severe ICANS, the authors noted.

A notable caveat is that EEG can be a time- and physician-consuming examination not easily accessed on a 24/7 daily practice level.

With such challenges, “[we] advocate for a close partnership between hematologists and electrophysiologists to make EEG access as easy as possible for this kind of patient, as EEG is a key game changer in patient course,” Mr. Mauget said.

Commenting on the findings, Marcela V. Maus, MD, PhD, director of the Cellular Immunotherapy Program at the Massachusetts General Hospital Cancer Center in Boston, agreed that the study adds importantly to a topic in need of more data.

“This is a very interesting study that starts to provide data behind the consensus recommendations that were initially made based purely on expert opinion and collective practices,” she said in an interview.

“I think [the EEG findings] are interesting, because EEG is often the most non-specific of these tests, and I would not have predicted this result. I also think that monitoring of cerebral spinal fluid [through lumbar puncture] could have potentially higher impact if there was a way to routinely quantify and detect the CAR-T cells,” Dr. Maus said.

“Although admittedly I think this may be of greater benefit when patients present with neurologic findings outside the typical window of ICANS, such as what can occur with delayed neurologic toxicities such as Parkinsonism after BCMA-directed CAR T cells,” she added.

Senior author Guillaume Manson, MD, a hematologist also with the University Hospital of Rennes, underscored that the results shouldn’t be construed to suggest that MRI or LP should not be used in such cases, but may often not be necessary.

“Every patient’s case is different, and these findings certainly do not say that certain tests should or should not be performed,” he said in a press statement.

“We did this research to generate clinical evidence to inform guidelines that support physicians in making clinical decisions when treating patients with these complex, and sometimes severe conditions,” he added.

Dr. Manson reported relationships with BMS-Celgene, Gilead-Kite, and Takeda. Dr. Maus disclosed ties with Century Therapeutics, TCR2, Kite/Gilead, Novartis, and several other companies in the field of cellular therapies.

Among diagnostic interventions recommended to manage the common CAR-T cell therapy–associated side effect of immune effector cell–associated neurotoxicity syndrome (ICANS), only electroencephalogram (EEG) shows significant therapeutic benefit — while magnetic resonance imaging (MRI) and lumbar puncture appear to have limited value, new research shows.

“Our results emphasize for the first time the role of EEG in the current guidelines [for ICANS] but question the need for systematic MRI and lumbar puncture,” reported the authors of the study, published in Blood Advances.

The study underscores that “EEG does more that depict insignificant anomalies and plays a key role in patient management in daily practice,” first author Mattéo Mauget, said in an interview. He is a resident in the intensive care unit at the University Hospital of Rennes in France.

ICANS is among the most common of acute neurotoxicities occurring after CAR T-cell therapy, and international guidelines recommend MRI, lumbar puncture, and EEG in the management of the toxicity, which is typically treated with anti-cytokine therapy and steroids.

However, the guidelines widely vary. All recommend the use of MRI for ICANS grade 3 or higher, but fewer recommend the approach for grade 2. Meanwhile, only some recommend the use of lumbar puncture, and even fewer guidelines recommend the use of EEG.

While these measures are expensive — and in the case of lumbar puncture, invasive and burdensome for patients — the recommendations on these measures “rely on empirical practices and are only based on expert opinions with low scientific evidence,” the authors wrote.

To evaluate the interventions in a cohort of real-life patients treated with CAR T-cell therapy, the authors identified 190 consecutive patients receiving the therapy at the University Hospital of Rennes, France, between August 2018 and January 2023.

Of the patients, 62% were male and their median age was 64. Overall, 91 (48%) developed ICANS.

The majority of patients (73%) received CAR-T cell therapy for a refractory/relapsed (R/R) DLBCL (73%), and most (60%) had received the CAR-T product axicabtagene-ciloleucel (axi-cel) after two or more prior therapies.

While MRI was performed in 78% of patients with ICANS, the measure was determined to have had a therapeutic impact in just 4% of patients, despite common observations of abnormal findings.

Lumbar puncture was meanwhile performed in 47% of patients, resulting in preemptive antimicrobial agents in 7% of patients, with no infection detected.

While systematic EEG was performed in 56% of patients, the intervention led to therapeutic modifications among 16% of those patients.

“Our findings highlight some divergences between guidelines and daily practice regarding diagnostic investigations,” the authors noted.

The study “shows that EEG is the diagnostic investigation with the greatest therapeutic impact, while MRI and lumbar puncture appear to have a limited therapeutic impact,” they concluded.
 

EEG Findings

Of note, only 18% of EEGs in the cohort were normal, ranging from 50% of those with ICANS grade 1 to 6% among those with ICANS grade 4.

Encephalopathy was the most common EEG finding, observed in 45% of patients, while 6 EEGs (12%) showed seizures or status epilepticus.

Two patients with ICANS grade 2 and 3 (6% of EEG) developed seizure or status epilepticus on their EEGs, despite the absence of clinical symptoms of epilepsy, while the rate was 4 (33%) among patients with ICANS grade 4.

Among the eight (16%) patients who received therapeutic modification as the result of the EEG, seven were in the severe and life-threatening ICANS (grade 3+) group (24%).

In addition, all EEGs detecting seizure or status epilepticus resulted in an increase in antiepileptic prophylaxis with levetiracetam or the introduction of a new antiepileptics, mainly phenytoin.

Surprisingly, there were no cases of diffuse edema in the entire cohort, even among those with grade 4 ICANS, which is one of the key concerns of treating physicians managing severe ICANS, the authors noted.

A notable caveat is that EEG can be a time- and physician-consuming examination not easily accessed on a 24/7 daily practice level.

With such challenges, “[we] advocate for a close partnership between hematologists and electrophysiologists to make EEG access as easy as possible for this kind of patient, as EEG is a key game changer in patient course,” Mr. Mauget said.

Commenting on the findings, Marcela V. Maus, MD, PhD, director of the Cellular Immunotherapy Program at the Massachusetts General Hospital Cancer Center in Boston, agreed that the study adds importantly to a topic in need of more data.

“This is a very interesting study that starts to provide data behind the consensus recommendations that were initially made based purely on expert opinion and collective practices,” she said in an interview.

“I think [the EEG findings] are interesting, because EEG is often the most non-specific of these tests, and I would not have predicted this result. I also think that monitoring of cerebral spinal fluid [through lumbar puncture] could have potentially higher impact if there was a way to routinely quantify and detect the CAR-T cells,” Dr. Maus said.

“Although admittedly I think this may be of greater benefit when patients present with neurologic findings outside the typical window of ICANS, such as what can occur with delayed neurologic toxicities such as Parkinsonism after BCMA-directed CAR T cells,” she added.

Senior author Guillaume Manson, MD, a hematologist also with the University Hospital of Rennes, underscored that the results shouldn’t be construed to suggest that MRI or LP should not be used in such cases, but may often not be necessary.

“Every patient’s case is different, and these findings certainly do not say that certain tests should or should not be performed,” he said in a press statement.

“We did this research to generate clinical evidence to inform guidelines that support physicians in making clinical decisions when treating patients with these complex, and sometimes severe conditions,” he added.

Dr. Manson reported relationships with BMS-Celgene, Gilead-Kite, and Takeda. Dr. Maus disclosed ties with Century Therapeutics, TCR2, Kite/Gilead, Novartis, and several other companies in the field of cellular therapies.

TOPLINE:

Secondary cancers were flagged in 4.3% of all adverse event reports among patients who received CAR T therapy, with T-cell malignancies comprising only 0.15% of the total reports and 3.54% of all second primary malignancies, according to an analysis of adverse event reports submitted to the US Food and Drug Administration (FDA).

METHODOLOGY:

• In November 2023, the FDA announced its investigation into whether chimeric antigen receptor (CAR) T-cell immunotherapies can cause secondary blood cancers, specifically T-cell malignancies. At the time, the agency said: “Although the overall benefits of these products continue to outweigh their potential risks for their approved uses, FDA is investigating the identified risk of T-cell malignancy with serious outcomes.”
• In January 2024, the FDA issued boxed warnings on the six approved CART cell therapies, citing the possibility of second primary malignancies, including CAR-positive lymphomas, in patients who had received a CAR T agent.
• To evaluate the extent of these secondary cancers, researchers analyzed the FDA Adverse Event Reporting System database for CAR T-cell reports citing second primary malignancies.

TAKEAWAY:

• Overall, the authors identified 12,394 unique adverse events associated with CAR T therapy; of these, 536 adverse events (4.3%) were second primary malignancies.
• Axicabtagene ciloleucel (axi-cel) and tisagenlecleucel (tis-cel) accounted for most of the second primary malignancies reports — 51.7% (277 of 536 patients) for axi-cel and 33% (177 of 536 patients) for tis-cel.
• The researchers identified 19 cases of T-cell malignancies, representing only 0.15% of all unique adverse events and 3.54% of all second primary malignancies (19 of 536 patients); 17 of these cases were T-cell non-Hodgkin lymphomas, and two were T-cell large granular lymphocytic leukemia.
• Among the reported 536 second primary malignancies, the most frequent cancers were leukemias (333 reports, or 62%), followed by skin neoplasms (54 reports, or 10.1%), hematopoietic neoplasms excluding leukemias and lymphomas (26 reports, 4.85%), nervous system tumors (21 reports, 3.92%), and respiratory neoplasms (20 reports, 3.73%).

IN PRACTICE:

“We will continue to monitor the data released by the FDA to learn more about CAR T-associated risks. However, it’s crucial to stress that the benefits of CAR T-cell therapies still outweigh the risks for the approved indications,” Magdi Elsallab, MD, the study’s co-lead author, said in a news release.

SOURCE:

This work, led by Dr. Elsallab from Harvard Medical School in Boston, was published online on March 14 in Blood.

LIMITATIONS:

The limitations of the analysis include the presence of duplicate report submissions, incomplete data, difficulty establishing causal relationships, and the potential for both underreporting and overreporting based on the severity of adverse events. Furthermore, without the total number of prescribed products, it was difficult to determine the adverse event frequency.

DISCLOSURES:

The study funding source was not disclosed. Some of the authors reported financial ties with various organizations outside this work, including Bristol Myers Squibb, Janssen Biotech, Johnson & Johnson, Kite Pharma, and Novartis.
 

A version of this article appeared on Medscape.com.

TOPLINE:

Secondary cancers were flagged in 4.3% of all adverse event reports among patients who received CAR T therapy, with T-cell malignancies comprising only 0.15% of the total reports and 3.54% of all second primary malignancies, according to an analysis of adverse event reports submitted to the US Food and Drug Administration (FDA).

METHODOLOGY:

• In November 2023, the FDA announced its investigation into whether chimeric antigen receptor (CAR) T-cell immunotherapies can cause secondary blood cancers, specifically T-cell malignancies. At the time, the agency said: “Although the overall benefits of these products continue to outweigh their potential risks for their approved uses, FDA is investigating the identified risk of T-cell malignancy with serious outcomes.”
• In January 2024, the FDA issued boxed warnings on the six approved CART cell therapies, citing the possibility of second primary malignancies, including CAR-positive lymphomas, in patients who had received a CAR T agent.
• To evaluate the extent of these secondary cancers, researchers analyzed the FDA Adverse Event Reporting System database for CAR T-cell reports citing second primary malignancies.

TAKEAWAY:

• Overall, the authors identified 12,394 unique adverse events associated with CAR T therapy; of these, 536 adverse events (4.3%) were second primary malignancies.
• Axicabtagene ciloleucel (axi-cel) and tisagenlecleucel (tis-cel) accounted for most of the second primary malignancies reports — 51.7% (277 of 536 patients) for axi-cel and 33% (177 of 536 patients) for tis-cel.
• The researchers identified 19 cases of T-cell malignancies, representing only 0.15% of all unique adverse events and 3.54% of all second primary malignancies (19 of 536 patients); 17 of these cases were T-cell non-Hodgkin lymphomas, and two were T-cell large granular lymphocytic leukemia.
• Among the reported 536 second primary malignancies, the most frequent cancers were leukemias (333 reports, or 62%), followed by skin neoplasms (54 reports, or 10.1%), hematopoietic neoplasms excluding leukemias and lymphomas (26 reports, 4.85%), nervous system tumors (21 reports, 3.92%), and respiratory neoplasms (20 reports, 3.73%).

IN PRACTICE:

“We will continue to monitor the data released by the FDA to learn more about CAR T-associated risks. However, it’s crucial to stress that the benefits of CAR T-cell therapies still outweigh the risks for the approved indications,” Magdi Elsallab, MD, the study’s co-lead author, said in a news release.

SOURCE:

This work, led by Dr. Elsallab from Harvard Medical School in Boston, was published online on March 14 in Blood.

LIMITATIONS:

The limitations of the analysis include the presence of duplicate report submissions, incomplete data, difficulty establishing causal relationships, and the potential for both underreporting and overreporting based on the severity of adverse events. Furthermore, without the total number of prescribed products, it was difficult to determine the adverse event frequency.

DISCLOSURES:

The study funding source was not disclosed. Some of the authors reported financial ties with various organizations outside this work, including Bristol Myers Squibb, Janssen Biotech, Johnson & Johnson, Kite Pharma, and Novartis.
 

A version of this article appeared on Medscape.com.

TOPLINE:

Secondary cancers were flagged in 4.3% of all adverse event reports among patients who received CAR T therapy, with T-cell malignancies comprising only 0.15% of the total reports and 3.54% of all second primary malignancies, according to an analysis of adverse event reports submitted to the US Food and Drug Administration (FDA).

METHODOLOGY:

• In November 2023, the FDA announced its investigation into whether chimeric antigen receptor (CAR) T-cell immunotherapies can cause secondary blood cancers, specifically T-cell malignancies. At the time, the agency said: “Although the overall benefits of these products continue to outweigh their potential risks for their approved uses, FDA is investigating the identified risk of T-cell malignancy with serious outcomes.”
• In January 2024, the FDA issued boxed warnings on the six approved CART cell therapies, citing the possibility of second primary malignancies, including CAR-positive lymphomas, in patients who had received a CAR T agent.
• To evaluate the extent of these secondary cancers, researchers analyzed the FDA Adverse Event Reporting System database for CAR T-cell reports citing second primary malignancies.

TAKEAWAY:

• Overall, the authors identified 12,394 unique adverse events associated with CAR T therapy; of these, 536 adverse events (4.3%) were second primary malignancies.
• Axicabtagene ciloleucel (axi-cel) and tisagenlecleucel (tis-cel) accounted for most of the second primary malignancies reports — 51.7% (277 of 536 patients) for axi-cel and 33% (177 of 536 patients) for tis-cel.
• The researchers identified 19 cases of T-cell malignancies, representing only 0.15% of all unique adverse events and 3.54% of all second primary malignancies (19 of 536 patients); 17 of these cases were T-cell non-Hodgkin lymphomas, and two were T-cell large granular lymphocytic leukemia.
• Among the reported 536 second primary malignancies, the most frequent cancers were leukemias (333 reports, or 62%), followed by skin neoplasms (54 reports, or 10.1%), hematopoietic neoplasms excluding leukemias and lymphomas (26 reports, 4.85%), nervous system tumors (21 reports, 3.92%), and respiratory neoplasms (20 reports, 3.73%).

IN PRACTICE:

“We will continue to monitor the data released by the FDA to learn more about CAR T-associated risks. However, it’s crucial to stress that the benefits of CAR T-cell therapies still outweigh the risks for the approved indications,” Magdi Elsallab, MD, the study’s co-lead author, said in a news release.

SOURCE:

This work, led by Dr. Elsallab from Harvard Medical School in Boston, was published online on March 14 in Blood.

LIMITATIONS:

The limitations of the analysis include the presence of duplicate report submissions, incomplete data, difficulty establishing causal relationships, and the potential for both underreporting and overreporting based on the severity of adverse events. Furthermore, without the total number of prescribed products, it was difficult to determine the adverse event frequency.

DISCLOSURES:

The study funding source was not disclosed. Some of the authors reported financial ties with various organizations outside this work, including Bristol Myers Squibb, Janssen Biotech, Johnson & Johnson, Kite Pharma, and Novartis.
 

A version of this article appeared on Medscape.com.

An advisory panel at the US Food and Drug Administration (FDA) lent support to bids that allow for earlier use of chimeric antigen receptor (CAR-T) therapies in treating multiple myeloma, while also calling for clear disclosure to patients of potential risks of these treatments.

The FDA asked its Oncologic Drugs Advisory Committee (ODAC) to vote on two separate but similar questions at the March 15 meeting. Much of their discussion centered on higher rates of deaths for patients on the CAR-T therapies during early stages of key studies.

ODAC voted 11-0 to say the risk-benefit assessment appeared favorable for a requested broadening of the patient pool for ciltacabtagene autoleucel (cilta-cel, Carvykti, Johnson & Johnson’s Janssen). J&J is seeking approval for use of the drug for adults with relapsed or refractory multiple myeloma (RRMM) who have received at least one prior line of therapy, including a proteasome inhibitor (PI) and an immunomodulatory agent (IMiD), and are refractory to lenalidomide.

ODAC voted 8-3 to say the risk-benefit assessment appeared favorable for a requested broadening of the patient pool for idecabtagene vicleucel (ide-cel, Abecma, Bristol Myers Squibb). The company is seeking approval of the drug for people with relapsed or refractory multiple myeloma (RRMM) who have received an IMiD, a PI, and an anti-CD38 antibody.

The FDA staff will consider ODAC’s votes and recommendations, but is not bound by them. Janssen’s parent company, J&J, said the FDA’s deadline for deciding on the request to change the cilta-cel label is April 5. Bristol Myers Squibb (BMS) said there is not a PDUFA deadline at this time for its application.

Both CAR-T treatments currently are approved for RRMM after 4 or more prior lines of therapy, including an IMiD, PI and an anti-CD38 monoclonal antibody. Last year BMS and Janssen filed their separate applications, both seeking to have their drugs used earlier in the course of RRMM.

Data provided in support of both requests for expanded use raised alarms at the FDA, with more deaths seen in the early stage of testing among patients given the CAR-T drugs compared to those given standard-of-care regimens, the agency staff said.

The application for cilta-cel rests heavily on the data from the CARTITUDE-4 trial. As reported in The New England Journal of Medicine last year, progression-free survival (PFS) at 12 months was 75.9% (95% CI, 69.4 to 81.1) in the cilta-cel group and 48.6% (95% CI, 41.5 to 55.3) in the standard-care group.

But the FDA staff review focused on worrying signs in the early months of this study. For example, the rate of death in the first 10 months post randomization was higher in the cilta-cel arm (29 of 208; 14%) than in the standard therapy arm (25 of 211; 12%) based on an analysis of the intent-to-treat (ITT) population, the FDA said.

In its review of the ide-cel application, the FDA staff said the median PFS was 13.3 months in the ide-cel arm (95% CI: 11.8, 16.1), and 4.4 months (95% CI: 3.4, 5.9) in the standard of care (SOC) arm.

However, the rate of deaths in the first 9 months post randomization was higher in the ide-cel arm (45/254; 18%) than in the comparator standard-of-care group (15/132; 11%) in the ITT population, the FDA staff said. In the safety analysis population, the rate of deaths from adverse events that occurred within 90 days from starting treatment was 2.7% in the ide-cel arm and 1.6 % in the standard-regimen group.

ODAC ultimately appeared more impressed by data indicating the potential benefit, measured as progression-free survival (PFS), of the two drugs under review, than they were concerned about the issues about early deaths raised by FDA staff.

Panelist Jorge J. Nieva, MD, of the University of Southern California said the CAR-T drugs may present another case of “front-loaded risk” as has been noted for other treatments for serious medical procedures, such as allogeneic transplantations and thoracic surgeries.

In response, Robert Sokolic, MD, the branch chief for malignant hematology at FDA, replied that the data raised concerns that did in fact remind him of these procedures.

“I’m a bone marrow transplant physician. And that’s exactly what I said when I saw these curves. This looks like an allogeneic transplant curve,” Dr. Sokolic said.

But there’s a major difference between that procedure and CAR-T in the context being considered at the ODAC meeting, he said.

With allogeneic transplant, physicians “counsel patients. We ask them to accept an upfront burden of increased mortality, because we know that down the line, overall, there’s a benefit in survival,” Dr. Sokolic said.

In contrast, the primary endpoint in the key studies for expansion of CAR-T drugs was progression-free survival (PFS), with overall survival as a second endpoint. The FDA staff in briefing documents noted how overall survival, the gold standard in research, delivers far more reliable answers for patients and doctors in assessing treatments.

In the exchange with Dr. Nieva, Dr. Sokolic noted that there’s far less certainty of benefit at this time when asking patients to consider CAR-T earlier in the progression of MM, especially given the safety concerns.

“We know there’s benefit in PFS. We know there’s a safety concern,” Dr. Sokolic said.“That’s not balanced by an overall survival balance on the tail end. It may be when the data are more mature, but it’s not there yet.”
 

Describing Risks to Patients

ODAC panelists also stressed a need to help patients understand what’s known — and not yet known — about these CAR-T therapies. It will be very challenging for patients to understand and interpret the data from key studies on these medicines, said ODAC panelist Susan Lattimore, RN, of Oregon Health & Science University. She suggested the FDA seek labeling that would be “overtly transparent” and use lay terms to describe the potential risks and benefits.

In its presentations to the FDA and ODAC, J&J noted that the COVID pandemic has affected testing and that the rate of deaths flips in time to be higher in the comparator group.

In its briefing document for the meeting, BMS emphasized that most of the patients in the ide-cel arm who died in the first 6 months of its trial did not get the study drug. There were 9 deaths in the standard-regimen arm, or 6.8% of the group, compared with 30, or 11.8% in the ide-cel group.

In the ide-cel arm, the majority of early deaths (17/30; 56.7%) occurred in patients who never received ide-cel treatment, with 13 of those 17 dying from disease progression, the company said in its briefing document. The early death rate among patients who received the allocated study treatment was similar between arms (5.1% in the ide-cel arm vs 6.8% in the standard regimen arm),the company said.

In the staff briefing, the FDA said the median PFS was 13.3 months in the ide-cel arm, compared with 4.4 months in the standard of care (SOC) arm. But there was a “clear and persistent increased mortality” for the ide-cel group, compared with the standard regimen arm, with increased rates of death up to 9 months. In addition, the overall survival disadvantage persisted to 15 months after randomization, when the survival curves finally crossed, the FDA staff said in its March 15 presentation.

ODAC Chairman Ravi A. Madan, MD, of the National Cancer Institute, was among the panelists who voted “no” in the ide-cel question. He said the risk-benefit profile of the drug does not appear favorable at this time for expanded use.

“There’s a lot of optimism about moving these therapies earlier in the disease states of multiple myeloma,” Dr. Madan said, calling the PFS data “quite remarkable.

“But for me this data at this level of maturity really didn’t provide convincing evidence that ide-cel earlier had a favorable risk benefit assessment in a proposed indication.”

ODAC panelist Christopher H. Lieu, MD, of the University of Colorado, said he struggled to decide how to vote on the ide-cel question and in the end voted yes.

He said the response to the treatment doesn’t appear to be as durable as hoped, considering the significant burden that CAR-T therapy imposes on patients. However, the PFS data suggest that ide-cel could offer patients with RRMM a chance for significant times off therapy with associated quality of life improvement.

“I do believe that the risk-benefit profile is favorable for this population as a whole,” he said. “But it’s a closer margin than I think we would like and patients will need to have in-depth discussions about the risks and benefits and balance that with the possible benefits with their provider.”

An advisory panel at the US Food and Drug Administration (FDA) lent support to bids that allow for earlier use of chimeric antigen receptor (CAR-T) therapies in treating multiple myeloma, while also calling for clear disclosure to patients of potential risks of these treatments.

The FDA asked its Oncologic Drugs Advisory Committee (ODAC) to vote on two separate but similar questions at the March 15 meeting. Much of their discussion centered on higher rates of deaths for patients on the CAR-T therapies during early stages of key studies.

ODAC voted 11-0 to say the risk-benefit assessment appeared favorable for a requested broadening of the patient pool for ciltacabtagene autoleucel (cilta-cel, Carvykti, Johnson & Johnson’s Janssen). J&J is seeking approval for use of the drug for adults with relapsed or refractory multiple myeloma (RRMM) who have received at least one prior line of therapy, including a proteasome inhibitor (PI) and an immunomodulatory agent (IMiD), and are refractory to lenalidomide.

ODAC voted 8-3 to say the risk-benefit assessment appeared favorable for a requested broadening of the patient pool for idecabtagene vicleucel (ide-cel, Abecma, Bristol Myers Squibb). The company is seeking approval of the drug for people with relapsed or refractory multiple myeloma (RRMM) who have received an IMiD, a PI, and an anti-CD38 antibody.

The FDA staff will consider ODAC’s votes and recommendations, but is not bound by them. Janssen’s parent company, J&J, said the FDA’s deadline for deciding on the request to change the cilta-cel label is April 5. Bristol Myers Squibb (BMS) said there is not a PDUFA deadline at this time for its application.

Both CAR-T treatments currently are approved for RRMM after 4 or more prior lines of therapy, including an IMiD, PI and an anti-CD38 monoclonal antibody. Last year BMS and Janssen filed their separate applications, both seeking to have their drugs used earlier in the course of RRMM.

Data provided in support of both requests for expanded use raised alarms at the FDA, with more deaths seen in the early stage of testing among patients given the CAR-T drugs compared to those given standard-of-care regimens, the agency staff said.

The application for cilta-cel rests heavily on the data from the CARTITUDE-4 trial. As reported in The New England Journal of Medicine last year, progression-free survival (PFS) at 12 months was 75.9% (95% CI, 69.4 to 81.1) in the cilta-cel group and 48.6% (95% CI, 41.5 to 55.3) in the standard-care group.

But the FDA staff review focused on worrying signs in the early months of this study. For example, the rate of death in the first 10 months post randomization was higher in the cilta-cel arm (29 of 208; 14%) than in the standard therapy arm (25 of 211; 12%) based on an analysis of the intent-to-treat (ITT) population, the FDA said.

In its review of the ide-cel application, the FDA staff said the median PFS was 13.3 months in the ide-cel arm (95% CI: 11.8, 16.1), and 4.4 months (95% CI: 3.4, 5.9) in the standard of care (SOC) arm.

However, the rate of deaths in the first 9 months post randomization was higher in the ide-cel arm (45/254; 18%) than in the comparator standard-of-care group (15/132; 11%) in the ITT population, the FDA staff said. In the safety analysis population, the rate of deaths from adverse events that occurred within 90 days from starting treatment was 2.7% in the ide-cel arm and 1.6 % in the standard-regimen group.

ODAC ultimately appeared more impressed by data indicating the potential benefit, measured as progression-free survival (PFS), of the two drugs under review, than they were concerned about the issues about early deaths raised by FDA staff.

Panelist Jorge J. Nieva, MD, of the University of Southern California said the CAR-T drugs may present another case of “front-loaded risk” as has been noted for other treatments for serious medical procedures, such as allogeneic transplantations and thoracic surgeries.

In response, Robert Sokolic, MD, the branch chief for malignant hematology at FDA, replied that the data raised concerns that did in fact remind him of these procedures.

“I’m a bone marrow transplant physician. And that’s exactly what I said when I saw these curves. This looks like an allogeneic transplant curve,” Dr. Sokolic said.

But there’s a major difference between that procedure and CAR-T in the context being considered at the ODAC meeting, he said.

With allogeneic transplant, physicians “counsel patients. We ask them to accept an upfront burden of increased mortality, because we know that down the line, overall, there’s a benefit in survival,” Dr. Sokolic said.

In contrast, the primary endpoint in the key studies for expansion of CAR-T drugs was progression-free survival (PFS), with overall survival as a second endpoint. The FDA staff in briefing documents noted how overall survival, the gold standard in research, delivers far more reliable answers for patients and doctors in assessing treatments.

In the exchange with Dr. Nieva, Dr. Sokolic noted that there’s far less certainty of benefit at this time when asking patients to consider CAR-T earlier in the progression of MM, especially given the safety concerns.

“We know there’s benefit in PFS. We know there’s a safety concern,” Dr. Sokolic said.“That’s not balanced by an overall survival balance on the tail end. It may be when the data are more mature, but it’s not there yet.”
 

Describing Risks to Patients

ODAC panelists also stressed a need to help patients understand what’s known — and not yet known — about these CAR-T therapies. It will be very challenging for patients to understand and interpret the data from key studies on these medicines, said ODAC panelist Susan Lattimore, RN, of Oregon Health & Science University. She suggested the FDA seek labeling that would be “overtly transparent” and use lay terms to describe the potential risks and benefits.

In its presentations to the FDA and ODAC, J&J noted that the COVID pandemic has affected testing and that the rate of deaths flips in time to be higher in the comparator group.

In its briefing document for the meeting, BMS emphasized that most of the patients in the ide-cel arm who died in the first 6 months of its trial did not get the study drug. There were 9 deaths in the standard-regimen arm, or 6.8% of the group, compared with 30, or 11.8% in the ide-cel group.

In the ide-cel arm, the majority of early deaths (17/30; 56.7%) occurred in patients who never received ide-cel treatment, with 13 of those 17 dying from disease progression, the company said in its briefing document. The early death rate among patients who received the allocated study treatment was similar between arms (5.1% in the ide-cel arm vs 6.8% in the standard regimen arm),the company said.

In the staff briefing, the FDA said the median PFS was 13.3 months in the ide-cel arm, compared with 4.4 months in the standard of care (SOC) arm. But there was a “clear and persistent increased mortality” for the ide-cel group, compared with the standard regimen arm, with increased rates of death up to 9 months. In addition, the overall survival disadvantage persisted to 15 months after randomization, when the survival curves finally crossed, the FDA staff said in its March 15 presentation.

ODAC Chairman Ravi A. Madan, MD, of the National Cancer Institute, was among the panelists who voted “no” in the ide-cel question. He said the risk-benefit profile of the drug does not appear favorable at this time for expanded use.

“There’s a lot of optimism about moving these therapies earlier in the disease states of multiple myeloma,” Dr. Madan said, calling the PFS data “quite remarkable.

“But for me this data at this level of maturity really didn’t provide convincing evidence that ide-cel earlier had a favorable risk benefit assessment in a proposed indication.”

ODAC panelist Christopher H. Lieu, MD, of the University of Colorado, said he struggled to decide how to vote on the ide-cel question and in the end voted yes.

He said the response to the treatment doesn’t appear to be as durable as hoped, considering the significant burden that CAR-T therapy imposes on patients. However, the PFS data suggest that ide-cel could offer patients with RRMM a chance for significant times off therapy with associated quality of life improvement.

“I do believe that the risk-benefit profile is favorable for this population as a whole,” he said. “But it’s a closer margin than I think we would like and patients will need to have in-depth discussions about the risks and benefits and balance that with the possible benefits with their provider.”

An advisory panel at the US Food and Drug Administration (FDA) lent support to bids that allow for earlier use of chimeric antigen receptor (CAR-T) therapies in treating multiple myeloma, while also calling for clear disclosure to patients of potential risks of these treatments.

The FDA asked its Oncologic Drugs Advisory Committee (ODAC) to vote on two separate but similar questions at the March 15 meeting. Much of their discussion centered on higher rates of deaths for patients on the CAR-T therapies during early stages of key studies.

ODAC voted 11-0 to say the risk-benefit assessment appeared favorable for a requested broadening of the patient pool for ciltacabtagene autoleucel (cilta-cel, Carvykti, Johnson & Johnson’s Janssen). J&J is seeking approval for use of the drug for adults with relapsed or refractory multiple myeloma (RRMM) who have received at least one prior line of therapy, including a proteasome inhibitor (PI) and an immunomodulatory agent (IMiD), and are refractory to lenalidomide.

ODAC voted 8-3 to say the risk-benefit assessment appeared favorable for a requested broadening of the patient pool for idecabtagene vicleucel (ide-cel, Abecma, Bristol Myers Squibb). The company is seeking approval of the drug for people with relapsed or refractory multiple myeloma (RRMM) who have received an IMiD, a PI, and an anti-CD38 antibody.

The FDA staff will consider ODAC’s votes and recommendations, but is not bound by them. Janssen’s parent company, J&J, said the FDA’s deadline for deciding on the request to change the cilta-cel label is April 5. Bristol Myers Squibb (BMS) said there is not a PDUFA deadline at this time for its application.

Both CAR-T treatments currently are approved for RRMM after 4 or more prior lines of therapy, including an IMiD, PI and an anti-CD38 monoclonal antibody. Last year BMS and Janssen filed their separate applications, both seeking to have their drugs used earlier in the course of RRMM.

Data provided in support of both requests for expanded use raised alarms at the FDA, with more deaths seen in the early stage of testing among patients given the CAR-T drugs compared to those given standard-of-care regimens, the agency staff said.

The application for cilta-cel rests heavily on the data from the CARTITUDE-4 trial. As reported in The New England Journal of Medicine last year, progression-free survival (PFS) at 12 months was 75.9% (95% CI, 69.4 to 81.1) in the cilta-cel group and 48.6% (95% CI, 41.5 to 55.3) in the standard-care group.

But the FDA staff review focused on worrying signs in the early months of this study. For example, the rate of death in the first 10 months post randomization was higher in the cilta-cel arm (29 of 208; 14%) than in the standard therapy arm (25 of 211; 12%) based on an analysis of the intent-to-treat (ITT) population, the FDA said.

In its review of the ide-cel application, the FDA staff said the median PFS was 13.3 months in the ide-cel arm (95% CI: 11.8, 16.1), and 4.4 months (95% CI: 3.4, 5.9) in the standard of care (SOC) arm.

However, the rate of deaths in the first 9 months post randomization was higher in the ide-cel arm (45/254; 18%) than in the comparator standard-of-care group (15/132; 11%) in the ITT population, the FDA staff said. In the safety analysis population, the rate of deaths from adverse events that occurred within 90 days from starting treatment was 2.7% in the ide-cel arm and 1.6 % in the standard-regimen group.

ODAC ultimately appeared more impressed by data indicating the potential benefit, measured as progression-free survival (PFS), of the two drugs under review, than they were concerned about the issues about early deaths raised by FDA staff.

Panelist Jorge J. Nieva, MD, of the University of Southern California said the CAR-T drugs may present another case of “front-loaded risk” as has been noted for other treatments for serious medical procedures, such as allogeneic transplantations and thoracic surgeries.

In response, Robert Sokolic, MD, the branch chief for malignant hematology at FDA, replied that the data raised concerns that did in fact remind him of these procedures.

“I’m a bone marrow transplant physician. And that’s exactly what I said when I saw these curves. This looks like an allogeneic transplant curve,” Dr. Sokolic said.

But there’s a major difference between that procedure and CAR-T in the context being considered at the ODAC meeting, he said.

With allogeneic transplant, physicians “counsel patients. We ask them to accept an upfront burden of increased mortality, because we know that down the line, overall, there’s a benefit in survival,” Dr. Sokolic said.

In contrast, the primary endpoint in the key studies for expansion of CAR-T drugs was progression-free survival (PFS), with overall survival as a second endpoint. The FDA staff in briefing documents noted how overall survival, the gold standard in research, delivers far more reliable answers for patients and doctors in assessing treatments.

In the exchange with Dr. Nieva, Dr. Sokolic noted that there’s far less certainty of benefit at this time when asking patients to consider CAR-T earlier in the progression of MM, especially given the safety concerns.

“We know there’s benefit in PFS. We know there’s a safety concern,” Dr. Sokolic said.“That’s not balanced by an overall survival balance on the tail end. It may be when the data are more mature, but it’s not there yet.”
 

Describing Risks to Patients

ODAC panelists also stressed a need to help patients understand what’s known — and not yet known — about these CAR-T therapies. It will be very challenging for patients to understand and interpret the data from key studies on these medicines, said ODAC panelist Susan Lattimore, RN, of Oregon Health & Science University. She suggested the FDA seek labeling that would be “overtly transparent” and use lay terms to describe the potential risks and benefits.

In its presentations to the FDA and ODAC, J&J noted that the COVID pandemic has affected testing and that the rate of deaths flips in time to be higher in the comparator group.

In its briefing document for the meeting, BMS emphasized that most of the patients in the ide-cel arm who died in the first 6 months of its trial did not get the study drug. There were 9 deaths in the standard-regimen arm, or 6.8% of the group, compared with 30, or 11.8% in the ide-cel group.

In the ide-cel arm, the majority of early deaths (17/30; 56.7%) occurred in patients who never received ide-cel treatment, with 13 of those 17 dying from disease progression, the company said in its briefing document. The early death rate among patients who received the allocated study treatment was similar between arms (5.1% in the ide-cel arm vs 6.8% in the standard regimen arm),the company said.

In the staff briefing, the FDA said the median PFS was 13.3 months in the ide-cel arm, compared with 4.4 months in the standard of care (SOC) arm. But there was a “clear and persistent increased mortality” for the ide-cel group, compared with the standard regimen arm, with increased rates of death up to 9 months. In addition, the overall survival disadvantage persisted to 15 months after randomization, when the survival curves finally crossed, the FDA staff said in its March 15 presentation.

ODAC Chairman Ravi A. Madan, MD, of the National Cancer Institute, was among the panelists who voted “no” in the ide-cel question. He said the risk-benefit profile of the drug does not appear favorable at this time for expanded use.

“There’s a lot of optimism about moving these therapies earlier in the disease states of multiple myeloma,” Dr. Madan said, calling the PFS data “quite remarkable.

“But for me this data at this level of maturity really didn’t provide convincing evidence that ide-cel earlier had a favorable risk benefit assessment in a proposed indication.”

ODAC panelist Christopher H. Lieu, MD, of the University of Colorado, said he struggled to decide how to vote on the ide-cel question and in the end voted yes.

He said the response to the treatment doesn’t appear to be as durable as hoped, considering the significant burden that CAR-T therapy imposes on patients. However, the PFS data suggest that ide-cel could offer patients with RRMM a chance for significant times off therapy with associated quality of life improvement.

“I do believe that the risk-benefit profile is favorable for this population as a whole,” he said. “But it’s a closer margin than I think we would like and patients will need to have in-depth discussions about the risks and benefits and balance that with the possible benefits with their provider.”

The US Food and Drug Administration (FDA) has granted accelerated approval for lisocabtagene maraleucel (liso-cel) for the treatment of certain adults with relapsed or refractory chronic lymphocytic leukemia (CLL) or small lymphocytic lymphoma (SLL).

Specifically, the CD19-directed chimeric antigen receptor (CAR) T-cell product (Breyanzi) from Juno Therapeutics, a Bristol-Myers Squib company, is approved for adults with CLL or SLL who have received at least two prior lines of therapy, including a Bruton tyrosine kinase (BTK) inhibitor and a B-cell lymphoma 2 (BCL-2) inhibitor. It is the first CAR T-cell therapy approved in this setting.

“CLL and SLL are currently considered incurable diseases with few treatment options in the relapsed setting that can confer complete responses,” lead trial investigator Tanya Siddiqi, MD, of City of Hope in Duarte, California, said in the press release. 

The FDA’s approval of liso-cel in this setting “is a remarkable breakthrough, shifting the treatment paradigm from continuous therapy with sequential regimens to overcome drug resistance, to a one-time personalized T-cell based approach that has the potential to offer patients complete and lasting remission,” Dr. Siddiqi added.

Liso-cel was first approved in 2021 for relapsed or refractory large B-cell lymphoma, as reported at the time by this news organization.

Approval for the new CLL and SLL indication followed Priority Review and was based on findings from the pivotal TRANSCEND CLL 004 study, in which 20% of patients with CLL or SLL achieved a complete response after a one-time liso-cel infusion, according to a Bristol-Myers Squibb press release.

The 89 participants in the open-label, phase 1/2 study received a single dose of liso-cel containing 90-110 x 106CAR-positive viable T cells. The overall response rate was 45%, and median duration of response was 35.3 months. Among the 20% of patients achieving a complete response, the median duration of that response was not reached at the time of data cutoff.

Liso-cel had a tolerable safety profile. Cytokine release syndrome and neurologic events were mostly low grade. Cytokine release syndrome of any grade occurred in 83% of patients; 9% were grade 3, and none were grade 4 or 5.

Neurologic events of any grade occurred in 46% of patients, with grade 3 events occurring in 20% of patients; one grade 4 event and no grade 5 events occurred.
 

A version of this article appeared on Medscape.com.

The US Food and Drug Administration (FDA) has granted accelerated approval for lisocabtagene maraleucel (liso-cel) for the treatment of certain adults with relapsed or refractory chronic lymphocytic leukemia (CLL) or small lymphocytic lymphoma (SLL).

Specifically, the CD19-directed chimeric antigen receptor (CAR) T-cell product (Breyanzi) from Juno Therapeutics, a Bristol-Myers Squib company, is approved for adults with CLL or SLL who have received at least two prior lines of therapy, including a Bruton tyrosine kinase (BTK) inhibitor and a B-cell lymphoma 2 (BCL-2) inhibitor. It is the first CAR T-cell therapy approved in this setting.

“CLL and SLL are currently considered incurable diseases with few treatment options in the relapsed setting that can confer complete responses,” lead trial investigator Tanya Siddiqi, MD, of City of Hope in Duarte, California, said in the press release. 

The FDA’s approval of liso-cel in this setting “is a remarkable breakthrough, shifting the treatment paradigm from continuous therapy with sequential regimens to overcome drug resistance, to a one-time personalized T-cell based approach that has the potential to offer patients complete and lasting remission,” Dr. Siddiqi added.

Liso-cel was first approved in 2021 for relapsed or refractory large B-cell lymphoma, as reported at the time by this news organization.

Approval for the new CLL and SLL indication followed Priority Review and was based on findings from the pivotal TRANSCEND CLL 004 study, in which 20% of patients with CLL or SLL achieved a complete response after a one-time liso-cel infusion, according to a Bristol-Myers Squibb press release.

The 89 participants in the open-label, phase 1/2 study received a single dose of liso-cel containing 90-110 x 106CAR-positive viable T cells. The overall response rate was 45%, and median duration of response was 35.3 months. Among the 20% of patients achieving a complete response, the median duration of that response was not reached at the time of data cutoff.

Liso-cel had a tolerable safety profile. Cytokine release syndrome and neurologic events were mostly low grade. Cytokine release syndrome of any grade occurred in 83% of patients; 9% were grade 3, and none were grade 4 or 5.

Neurologic events of any grade occurred in 46% of patients, with grade 3 events occurring in 20% of patients; one grade 4 event and no grade 5 events occurred.
 

A version of this article appeared on Medscape.com.

The US Food and Drug Administration (FDA) has granted accelerated approval for lisocabtagene maraleucel (liso-cel) for the treatment of certain adults with relapsed or refractory chronic lymphocytic leukemia (CLL) or small lymphocytic lymphoma (SLL).

Specifically, the CD19-directed chimeric antigen receptor (CAR) T-cell product (Breyanzi) from Juno Therapeutics, a Bristol-Myers Squib company, is approved for adults with CLL or SLL who have received at least two prior lines of therapy, including a Bruton tyrosine kinase (BTK) inhibitor and a B-cell lymphoma 2 (BCL-2) inhibitor. It is the first CAR T-cell therapy approved in this setting.

“CLL and SLL are currently considered incurable diseases with few treatment options in the relapsed setting that can confer complete responses,” lead trial investigator Tanya Siddiqi, MD, of City of Hope in Duarte, California, said in the press release. 

The FDA’s approval of liso-cel in this setting “is a remarkable breakthrough, shifting the treatment paradigm from continuous therapy with sequential regimens to overcome drug resistance, to a one-time personalized T-cell based approach that has the potential to offer patients complete and lasting remission,” Dr. Siddiqi added.

Liso-cel was first approved in 2021 for relapsed or refractory large B-cell lymphoma, as reported at the time by this news organization.

Approval for the new CLL and SLL indication followed Priority Review and was based on findings from the pivotal TRANSCEND CLL 004 study, in which 20% of patients with CLL or SLL achieved a complete response after a one-time liso-cel infusion, according to a Bristol-Myers Squibb press release.

The 89 participants in the open-label, phase 1/2 study received a single dose of liso-cel containing 90-110 x 106CAR-positive viable T cells. The overall response rate was 45%, and median duration of response was 35.3 months. Among the 20% of patients achieving a complete response, the median duration of that response was not reached at the time of data cutoff.

Liso-cel had a tolerable safety profile. Cytokine release syndrome and neurologic events were mostly low grade. Cytokine release syndrome of any grade occurred in 83% of patients; 9% were grade 3, and none were grade 4 or 5.

Neurologic events of any grade occurred in 46% of patients, with grade 3 events occurring in 20% of patients; one grade 4 event and no grade 5 events occurred.
 

A version of this article appeared on Medscape.com.

A new grading system designed to improve the assessment of hematological toxicities following chimeric antigen receptor (CAR) T-cell therapy shows utility for a real-world population, providing much-needed standardization and guidance for management of the potentially life-threatening events.

“Hematotoxicity after CAR T is common and clinically relevant, but it also remains poorly understood [with] a high degree of heterogeneity in terms of grading its clinical management,” said first author Kai Rejeski, MD, in presenting on the findings at the 6th European CAR T-cell Meeting, held in Spain and jointly sponsored by the European Society for Blood and Marrow Transplantation (EBMT) and the European Hematology Association (EHA).

“We hope that this novel grading system helps with this by enabling harmonized reporting using the same nomenclature and allowing the comparison of the expected incidence rates of grade 3 or higher [hematological toxicities] across several disease entities and CAR T products,” said Dr. Rejeski, of the Adult BMT (Blood Marrow Transplant) and Cellular Therapy Service, Memorial Sloan Kettering Cancer Center, New York City.

ICAHT Grading System

In a recent meta-analysis, Dr. Rejeski and his team found that infections are the cause of as many as 49% of non–relapse related deaths after CAR T-cell therapy, representing the most common cause of death and numbering significantly more than the more prominent causes of cytokine release syndrome (CRS) or immune effector cell–associated neurotoxicity (ICANS), which paradoxically have been the focus of significantly more research. In addition, the authors have reported substantial inconsistency among CAR T centers in the grading and management of the post–CAR T cytopenias that can cause those infections, underscoring the need for better guidelines.

“The narrative around CAR T toxicity has long centered on CRS and ICANS as novel and prototypical side effects with distinct management protocols,” Dr. Rejeski said in an interview. “However, it is cytopenias and the associated infections that drive nonrelapse mortality after CAR T.”

To address the need, the EHA and EBMT established the grading system for Immune Effector Cell–Associated HematoToxicity (ICAHT) that is applicable across disease types, indications, and treatment settings.

The details of the grading system were published in September 2023 in the journal Blood. The new system, which specifically focuses on neutrophil count and timing, importantly addresses the biphasic nature of ICAHT by distinguishing “early” ICAHT, occurring within 30 days of the CAR T administration, and “late” ICAHT, occurring more that 30 days following the treatment.

By contrast, conventional grading scales for CAR T–related cytopenias, such as the Common Terminology Criteria for Adverse Events (CTCAE) scale, “neither reflect the unique quality of post–CAR T neutrophil recovery, nor do they reflect the inherent risk of infections due to protracted neutropenia,” the authors report in the study.

Real-World Evaluation

To assess the ICAHT grading system’s relevance in a real-world clinical setting of CAR T-cell therapy recipients, Dr. Rejeski and colleagues conducted a multicenter observational study, published in January 2024 in Blood Advances.

The study involved 549 patients at 12 international CAR T centers treated with BCMA- or CD19- directed CAR T therapy for relapsed/refractory B-cell malignancies.

Of the patients, 112 were treated for multiple myeloma (MM), 334 for large B cell lymphoma (LBCL), and 103 for mantle cell lymphoma (MCL).

Using the grading system, grade 3 (severe) or 4 (life-threatening) ICAHT (n = 125), was found to be strongly associated with key factors including a cumulative duration of severe neutropenia (P < .0001), the presence of multilineage cytopenias, such as severe thrombocytopenia (90%, compared with 46% in nonsevere ICAHT) and severe anemia (92% vs 49%; both P < .001), as well as the use of platelet and red blood cell transfusions.

Grade 3 or higher ICAHT was more common in patients with MCL (28%), compared with LBCL (23%) and MM (15%).

Key factors at baseline that were independently associated with severe ICAHT after multivariate adjustment included the presence of bone marrow infiltration, increased serum LDH levels, elevated CAR-HEMATOTOX scores (all P < .001), and receipt of CD28z costimulatory domain products, including axi-cel or brexu-cel (P = .01).

Those with grade 3 or higher ICAHT scores had a significantly higher rate of severe infections, compared with lower ICAHT scores (49% vs 13%; P < .0001), as well as increased nonrelapse mortality (14% vs 4.5%; P < .0001), primarily attributable to fatal infections.

Survival outcomes were also worse with grade 3 or higher ICAHT, including significantly lower rates of 1-year progression-free survival (35% vs 51%) and 1-year overall survival (52% vs 73%; both P < .0001).

Grade 3 or higher ICAHT was also significantly associated with prolonged hospital stays (median 21 vs 16 days; P < .0001).

However, contrary to findings from some previous studies, the current study showed no association between ICAHT severity and the prior administration of autologous stem cell transplant.

The number of prior treatment lines was not associated with grade 3 or higher ICAHT. However, grade 3 or higher CRS was more common as a cotoxicity (15% vs 5% without severe ICAHT), as was severe ICANS (26% vs 13%; both P < .001).

Notably, ICAHT grading showed superiority in the prediction of severe infections, compared with CTCAE grading (c-index 0.73 vs 0.55, P < .0001 vs nonsignificant).

While mild to moderate toxicity after CAR T-cell therapy has been associated with more favorable outcomes, the poor survival rates associated with severe ICAHT “underscore that high-grade toxicity and inferior treatment outcomes often go hand-in-hand,” the authors write.

Conversely, “the patients with grade 1 or 2 ICAHT exhibited excellent treatment outcomes in our study,” they point out.

Recommendations in Clinical Practice

For clinical guidance, the ICAHT grading system provides best practice recommendations based on severity for diagnostic work-up and management, such as measures including use of granulocyte-colony stimulating factor (G-CSF), anti-infective prophylaxis and stem cell boosts.

The authors add that preinfusion scoring systems, including the CAR-HEMATOTOX prognostic score, may be optimized by ICAHT grading in terms of modeling for severe or life-threatening ICAHT as an important endpoint.

“We have had an absence of the standardized severity-based guidelines that we know very well for CRS and ICANS, both in terms of the diagnostic work-up and the grading but also the management,” Dr. Rejeski said at the meeting.

“We hope that the new ICAHT grading focuses future research efforts to not only understand this important side effect better, but also develop specific management strategies that mitigate the risk of infections in high-risk patients,” Dr. Rejeski added.

“The multiply validated CAR-HEMATOTOX score, assessed at time of lymphodepletion, may be helpful in this regard,” he added.

An accompanying editorial published with the guidelines underscored that “this is the first such guideline by a major organization and is a much-needed development for the management of this important CAR T-cell–associated toxicity.”

The improved standardized reporting of ICAHT “could also inform hematotoxicity management protocols,” said the editorial authors, David Qualls, MD, of the Memorial Sloan Kettering Cancer Center in New York City and Caron Jacobson, MD, of the Dana-Farber Cancer Institute, in Boston, Massachusetts.

“While providing comprehensive recommendations for ICAHT, the EHA/EBMT guidelines also highlight important gaps in our current knowledge of ICAHT, which are significant,” the editorial authors add.

Further commenting, Ulrich Jaeger, MD, a professor of hematology at the Medical University of Vienna, Vienna, Austria, agreed that the research fills an important need in post–CAR T-cell therapy management.

“Dr. Rejeski´s work is really seminal in the field and confirmed by validation cohorts in other centers,” he said in an interview. “I think the story is absolutely clear. It will be of increasing importance, with more patients surviving. [The system] will have to be adapted to novel indications as well.”

Dr. Rejeski disclosed ties with Kite/Gilead, Novartis, GMS/Celgene, and Pierre-Fabre. Jaeger reports relationships with Novartis, Gilead Sciences, Celgene/BMS, Janssen, Roche, Miltenyi Biotec, and Innovative Medicines Initiative.

A new grading system designed to improve the assessment of hematological toxicities following chimeric antigen receptor (CAR) T-cell therapy shows utility for a real-world population, providing much-needed standardization and guidance for management of the potentially life-threatening events.

“Hematotoxicity after CAR T is common and clinically relevant, but it also remains poorly understood [with] a high degree of heterogeneity in terms of grading its clinical management,” said first author Kai Rejeski, MD, in presenting on the findings at the 6th European CAR T-cell Meeting, held in Spain and jointly sponsored by the European Society for Blood and Marrow Transplantation (EBMT) and the European Hematology Association (EHA).

“We hope that this novel grading system helps with this by enabling harmonized reporting using the same nomenclature and allowing the comparison of the expected incidence rates of grade 3 or higher [hematological toxicities] across several disease entities and CAR T products,” said Dr. Rejeski, of the Adult BMT (Blood Marrow Transplant) and Cellular Therapy Service, Memorial Sloan Kettering Cancer Center, New York City.

ICAHT Grading System

In a recent meta-analysis, Dr. Rejeski and his team found that infections are the cause of as many as 49% of non–relapse related deaths after CAR T-cell therapy, representing the most common cause of death and numbering significantly more than the more prominent causes of cytokine release syndrome (CRS) or immune effector cell–associated neurotoxicity (ICANS), which paradoxically have been the focus of significantly more research. In addition, the authors have reported substantial inconsistency among CAR T centers in the grading and management of the post–CAR T cytopenias that can cause those infections, underscoring the need for better guidelines.

“The narrative around CAR T toxicity has long centered on CRS and ICANS as novel and prototypical side effects with distinct management protocols,” Dr. Rejeski said in an interview. “However, it is cytopenias and the associated infections that drive nonrelapse mortality after CAR T.”

To address the need, the EHA and EBMT established the grading system for Immune Effector Cell–Associated HematoToxicity (ICAHT) that is applicable across disease types, indications, and treatment settings.

The details of the grading system were published in September 2023 in the journal Blood. The new system, which specifically focuses on neutrophil count and timing, importantly addresses the biphasic nature of ICAHT by distinguishing “early” ICAHT, occurring within 30 days of the CAR T administration, and “late” ICAHT, occurring more that 30 days following the treatment.

By contrast, conventional grading scales for CAR T–related cytopenias, such as the Common Terminology Criteria for Adverse Events (CTCAE) scale, “neither reflect the unique quality of post–CAR T neutrophil recovery, nor do they reflect the inherent risk of infections due to protracted neutropenia,” the authors report in the study.

Real-World Evaluation

To assess the ICAHT grading system’s relevance in a real-world clinical setting of CAR T-cell therapy recipients, Dr. Rejeski and colleagues conducted a multicenter observational study, published in January 2024 in Blood Advances.

The study involved 549 patients at 12 international CAR T centers treated with BCMA- or CD19- directed CAR T therapy for relapsed/refractory B-cell malignancies.

Of the patients, 112 were treated for multiple myeloma (MM), 334 for large B cell lymphoma (LBCL), and 103 for mantle cell lymphoma (MCL).

Using the grading system, grade 3 (severe) or 4 (life-threatening) ICAHT (n = 125), was found to be strongly associated with key factors including a cumulative duration of severe neutropenia (P < .0001), the presence of multilineage cytopenias, such as severe thrombocytopenia (90%, compared with 46% in nonsevere ICAHT) and severe anemia (92% vs 49%; both P < .001), as well as the use of platelet and red blood cell transfusions.

Grade 3 or higher ICAHT was more common in patients with MCL (28%), compared with LBCL (23%) and MM (15%).

Key factors at baseline that were independently associated with severe ICAHT after multivariate adjustment included the presence of bone marrow infiltration, increased serum LDH levels, elevated CAR-HEMATOTOX scores (all P < .001), and receipt of CD28z costimulatory domain products, including axi-cel or brexu-cel (P = .01).

Those with grade 3 or higher ICAHT scores had a significantly higher rate of severe infections, compared with lower ICAHT scores (49% vs 13%; P < .0001), as well as increased nonrelapse mortality (14% vs 4.5%; P < .0001), primarily attributable to fatal infections.

Survival outcomes were also worse with grade 3 or higher ICAHT, including significantly lower rates of 1-year progression-free survival (35% vs 51%) and 1-year overall survival (52% vs 73%; both P < .0001).

Grade 3 or higher ICAHT was also significantly associated with prolonged hospital stays (median 21 vs 16 days; P < .0001).

However, contrary to findings from some previous studies, the current study showed no association between ICAHT severity and the prior administration of autologous stem cell transplant.

The number of prior treatment lines was not associated with grade 3 or higher ICAHT. However, grade 3 or higher CRS was more common as a cotoxicity (15% vs 5% without severe ICAHT), as was severe ICANS (26% vs 13%; both P < .001).

Notably, ICAHT grading showed superiority in the prediction of severe infections, compared with CTCAE grading (c-index 0.73 vs 0.55, P < .0001 vs nonsignificant).

While mild to moderate toxicity after CAR T-cell therapy has been associated with more favorable outcomes, the poor survival rates associated with severe ICAHT “underscore that high-grade toxicity and inferior treatment outcomes often go hand-in-hand,” the authors write.

Conversely, “the patients with grade 1 or 2 ICAHT exhibited excellent treatment outcomes in our study,” they point out.

Recommendations in Clinical Practice

For clinical guidance, the ICAHT grading system provides best practice recommendations based on severity for diagnostic work-up and management, such as measures including use of granulocyte-colony stimulating factor (G-CSF), anti-infective prophylaxis and stem cell boosts.

The authors add that preinfusion scoring systems, including the CAR-HEMATOTOX prognostic score, may be optimized by ICAHT grading in terms of modeling for severe or life-threatening ICAHT as an important endpoint.

“We have had an absence of the standardized severity-based guidelines that we know very well for CRS and ICANS, both in terms of the diagnostic work-up and the grading but also the management,” Dr. Rejeski said at the meeting.

“We hope that the new ICAHT grading focuses future research efforts to not only understand this important side effect better, but also develop specific management strategies that mitigate the risk of infections in high-risk patients,” Dr. Rejeski added.

“The multiply validated CAR-HEMATOTOX score, assessed at time of lymphodepletion, may be helpful in this regard,” he added.

An accompanying editorial published with the guidelines underscored that “this is the first such guideline by a major organization and is a much-needed development for the management of this important CAR T-cell–associated toxicity.”

The improved standardized reporting of ICAHT “could also inform hematotoxicity management protocols,” said the editorial authors, David Qualls, MD, of the Memorial Sloan Kettering Cancer Center in New York City and Caron Jacobson, MD, of the Dana-Farber Cancer Institute, in Boston, Massachusetts.

“While providing comprehensive recommendations for ICAHT, the EHA/EBMT guidelines also highlight important gaps in our current knowledge of ICAHT, which are significant,” the editorial authors add.

Further commenting, Ulrich Jaeger, MD, a professor of hematology at the Medical University of Vienna, Vienna, Austria, agreed that the research fills an important need in post–CAR T-cell therapy management.

“Dr. Rejeski´s work is really seminal in the field and confirmed by validation cohorts in other centers,” he said in an interview. “I think the story is absolutely clear. It will be of increasing importance, with more patients surviving. [The system] will have to be adapted to novel indications as well.”

Dr. Rejeski disclosed ties with Kite/Gilead, Novartis, GMS/Celgene, and Pierre-Fabre. Jaeger reports relationships with Novartis, Gilead Sciences, Celgene/BMS, Janssen, Roche, Miltenyi Biotec, and Innovative Medicines Initiative.

A new grading system designed to improve the assessment of hematological toxicities following chimeric antigen receptor (CAR) T-cell therapy shows utility for a real-world population, providing much-needed standardization and guidance for management of the potentially life-threatening events.

“Hematotoxicity after CAR T is common and clinically relevant, but it also remains poorly understood [with] a high degree of heterogeneity in terms of grading its clinical management,” said first author Kai Rejeski, MD, in presenting on the findings at the 6th European CAR T-cell Meeting, held in Spain and jointly sponsored by the European Society for Blood and Marrow Transplantation (EBMT) and the European Hematology Association (EHA).

“We hope that this novel grading system helps with this by enabling harmonized reporting using the same nomenclature and allowing the comparison of the expected incidence rates of grade 3 or higher [hematological toxicities] across several disease entities and CAR T products,” said Dr. Rejeski, of the Adult BMT (Blood Marrow Transplant) and Cellular Therapy Service, Memorial Sloan Kettering Cancer Center, New York City.

ICAHT Grading System

In a recent meta-analysis, Dr. Rejeski and his team found that infections are the cause of as many as 49% of non–relapse related deaths after CAR T-cell therapy, representing the most common cause of death and numbering significantly more than the more prominent causes of cytokine release syndrome (CRS) or immune effector cell–associated neurotoxicity (ICANS), which paradoxically have been the focus of significantly more research. In addition, the authors have reported substantial inconsistency among CAR T centers in the grading and management of the post–CAR T cytopenias that can cause those infections, underscoring the need for better guidelines.

“The narrative around CAR T toxicity has long centered on CRS and ICANS as novel and prototypical side effects with distinct management protocols,” Dr. Rejeski said in an interview. “However, it is cytopenias and the associated infections that drive nonrelapse mortality after CAR T.”

To address the need, the EHA and EBMT established the grading system for Immune Effector Cell–Associated HematoToxicity (ICAHT) that is applicable across disease types, indications, and treatment settings.

The details of the grading system were published in September 2023 in the journal Blood. The new system, which specifically focuses on neutrophil count and timing, importantly addresses the biphasic nature of ICAHT by distinguishing “early” ICAHT, occurring within 30 days of the CAR T administration, and “late” ICAHT, occurring more that 30 days following the treatment.

By contrast, conventional grading scales for CAR T–related cytopenias, such as the Common Terminology Criteria for Adverse Events (CTCAE) scale, “neither reflect the unique quality of post–CAR T neutrophil recovery, nor do they reflect the inherent risk of infections due to protracted neutropenia,” the authors report in the study.

Real-World Evaluation

To assess the ICAHT grading system’s relevance in a real-world clinical setting of CAR T-cell therapy recipients, Dr. Rejeski and colleagues conducted a multicenter observational study, published in January 2024 in Blood Advances.

The study involved 549 patients at 12 international CAR T centers treated with BCMA- or CD19- directed CAR T therapy for relapsed/refractory B-cell malignancies.

Of the patients, 112 were treated for multiple myeloma (MM), 334 for large B cell lymphoma (LBCL), and 103 for mantle cell lymphoma (MCL).

Using the grading system, grade 3 (severe) or 4 (life-threatening) ICAHT (n = 125), was found to be strongly associated with key factors including a cumulative duration of severe neutropenia (P < .0001), the presence of multilineage cytopenias, such as severe thrombocytopenia (90%, compared with 46% in nonsevere ICAHT) and severe anemia (92% vs 49%; both P < .001), as well as the use of platelet and red blood cell transfusions.

Grade 3 or higher ICAHT was more common in patients with MCL (28%), compared with LBCL (23%) and MM (15%).

Key factors at baseline that were independently associated with severe ICAHT after multivariate adjustment included the presence of bone marrow infiltration, increased serum LDH levels, elevated CAR-HEMATOTOX scores (all P < .001), and receipt of CD28z costimulatory domain products, including axi-cel or brexu-cel (P = .01).

Those with grade 3 or higher ICAHT scores had a significantly higher rate of severe infections, compared with lower ICAHT scores (49% vs 13%; P < .0001), as well as increased nonrelapse mortality (14% vs 4.5%; P < .0001), primarily attributable to fatal infections.

Survival outcomes were also worse with grade 3 or higher ICAHT, including significantly lower rates of 1-year progression-free survival (35% vs 51%) and 1-year overall survival (52% vs 73%; both P < .0001).

Grade 3 or higher ICAHT was also significantly associated with prolonged hospital stays (median 21 vs 16 days; P < .0001).

However, contrary to findings from some previous studies, the current study showed no association between ICAHT severity and the prior administration of autologous stem cell transplant.

The number of prior treatment lines was not associated with grade 3 or higher ICAHT. However, grade 3 or higher CRS was more common as a cotoxicity (15% vs 5% without severe ICAHT), as was severe ICANS (26% vs 13%; both P < .001).

Notably, ICAHT grading showed superiority in the prediction of severe infections, compared with CTCAE grading (c-index 0.73 vs 0.55, P < .0001 vs nonsignificant).

While mild to moderate toxicity after CAR T-cell therapy has been associated with more favorable outcomes, the poor survival rates associated with severe ICAHT “underscore that high-grade toxicity and inferior treatment outcomes often go hand-in-hand,” the authors write.

Conversely, “the patients with grade 1 or 2 ICAHT exhibited excellent treatment outcomes in our study,” they point out.

Recommendations in Clinical Practice

For clinical guidance, the ICAHT grading system provides best practice recommendations based on severity for diagnostic work-up and management, such as measures including use of granulocyte-colony stimulating factor (G-CSF), anti-infective prophylaxis and stem cell boosts.

The authors add that preinfusion scoring systems, including the CAR-HEMATOTOX prognostic score, may be optimized by ICAHT grading in terms of modeling for severe or life-threatening ICAHT as an important endpoint.

“We have had an absence of the standardized severity-based guidelines that we know very well for CRS and ICANS, both in terms of the diagnostic work-up and the grading but also the management,” Dr. Rejeski said at the meeting.

“We hope that the new ICAHT grading focuses future research efforts to not only understand this important side effect better, but also develop specific management strategies that mitigate the risk of infections in high-risk patients,” Dr. Rejeski added.

“The multiply validated CAR-HEMATOTOX score, assessed at time of lymphodepletion, may be helpful in this regard,” he added.

An accompanying editorial published with the guidelines underscored that “this is the first such guideline by a major organization and is a much-needed development for the management of this important CAR T-cell–associated toxicity.”

The improved standardized reporting of ICAHT “could also inform hematotoxicity management protocols,” said the editorial authors, David Qualls, MD, of the Memorial Sloan Kettering Cancer Center in New York City and Caron Jacobson, MD, of the Dana-Farber Cancer Institute, in Boston, Massachusetts.

“While providing comprehensive recommendations for ICAHT, the EHA/EBMT guidelines also highlight important gaps in our current knowledge of ICAHT, which are significant,” the editorial authors add.

Further commenting, Ulrich Jaeger, MD, a professor of hematology at the Medical University of Vienna, Vienna, Austria, agreed that the research fills an important need in post–CAR T-cell therapy management.

“Dr. Rejeski´s work is really seminal in the field and confirmed by validation cohorts in other centers,” he said in an interview. “I think the story is absolutely clear. It will be of increasing importance, with more patients surviving. [The system] will have to be adapted to novel indications as well.”

Dr. Rejeski disclosed ties with Kite/Gilead, Novartis, GMS/Celgene, and Pierre-Fabre. Jaeger reports relationships with Novartis, Gilead Sciences, Celgene/BMS, Janssen, Roche, Miltenyi Biotec, and Innovative Medicines Initiative.

Patients with B-cell acute lymphoblastic leukemia (B-ALL) who relapse following hematopoietic stem cell transplant (allo-HCT) show significantly superior survival outcomes when treated with chimeric antigen receptor (CAR) T-cell therapy compared with other novel alternative therapies, a real-world analysis of patients in the UK shows.

“This is the first time there is a real-world comparison of CAR-T cell therapy versus other treatments in the era of other novel therapies such as inotuzumab or tyrosine kinase inhibitors (TKIs),” said first author Alexandros Rampotas, MD, of the University College London Hospital NHS Foundation Trust. “The study was looking retrospectively at patients treated in the UK, but the results should be applicable to most countries where similar treatments are available.”

Dr. Rampotas presented the research at the 6th European CAR T-cell Meeting jointly sponsored by the Society for Blood and Marrow Transplantation and the European Hematology Association.

Outcomes when patients with B-ALL relapse after allo-HCT treatment are generally very poor, and while the advent of CAR T-cell therapy has provided significant improvements, additional novel targeted therapies have also joined the field to further improve outcomes.

With no prior studies directly comparing outcomes between the various treatment options in a real-world setting, Dr. Rampotas and colleagues conducted a retrospective analysis of posttransplant relapsed B-ALL cases at six major transplant centers in the United Kingdom between 2010 and 2022.

Of 93 patients with sufficient data for the analysis, 17 had been treated with CAR T-cell therapy: 4 with UCART19, 1 with CD22 CAR T-cell, and 12 with the CD19-directed CAR T-cell products tisagenlecleucel (Kymriah) or obecabtagene autoleucel (obe-cel).

Among the remaining 75 patients who received non-CAR T-cell therapies, 24 received TKIs, 11 received blinatumumab, 12 received inotuzumab, 10 received intensive chemotherapy, 3 received intensive chemotherapy and TKI therapy, 14 received palliative/supportive regimens and 1 had a second allo-HCT following relapse from the first.

The median time from relapse to treatment was 2.8 months in the CAR T-cell therapy group, and 0.32 months for those receiving non-CAR T-cell therapies.

“The 2.8-month time-to-treat is quite expected as CAR T-cells can take a while to manufacture and be infused,” Dr. Rampotas noted. “This also comes with the bias that the patients who did receive them were likely fitter and could wait for that long.”

Patients receiving CAR T-cell therapy were also younger (median age 26 versus 47 in the non-CAR T-cell group) but the CAR T-cell group had higher risk disease and had a median of 2 prior lines of therapy versus 1 in the non-CAR T-cell group.

With a median follow-up of 24.8 months, patients receiving CAR T-cell therapy had significantly better rates of overall survival (OS), with 31 months compared with the non-CAR T-cell therapy OS of just 6.4 months (P = .0147).

The patients treated with CAR T-cell therapy also had improved progression-free survival (PFS) over the non-CAR T-cell patients (16.7 vs 3.7 months; P = .0001).

The superior outcomes in the CAR T-cell group remained consistent after exclusion of patients who received palliative approaches.

“In the realm of numerous innovative therapies for B-ALL, CAR Ts have now, for the first time, exhibited superior outcomes over alternative approaches in posttransplant relapsed B-ALL in the real world,” the authors reported. “The clear superior PFS and OS should encourage the use of more CAR T-cell therapies for this challenging cohort, while further improvements are imperative to enhance outcomes.”

In the meantime, “patients who relapse post transplant with B-ALL should be referred for CAR-T cell therapy as it is a superior treatment to other available options,” Dr. Rampotas said.

Dr. Rampotas discloses receiving conference fees from Gilead.

Patients with B-cell acute lymphoblastic leukemia (B-ALL) who relapse following hematopoietic stem cell transplant (allo-HCT) show significantly superior survival outcomes when treated with chimeric antigen receptor (CAR) T-cell therapy compared with other novel alternative therapies, a real-world analysis of patients in the UK shows.

“This is the first time there is a real-world comparison of CAR-T cell therapy versus other treatments in the era of other novel therapies such as inotuzumab or tyrosine kinase inhibitors (TKIs),” said first author Alexandros Rampotas, MD, of the University College London Hospital NHS Foundation Trust. “The study was looking retrospectively at patients treated in the UK, but the results should be applicable to most countries where similar treatments are available.”

Dr. Rampotas presented the research at the 6th European CAR T-cell Meeting jointly sponsored by the Society for Blood and Marrow Transplantation and the European Hematology Association.

Outcomes when patients with B-ALL relapse after allo-HCT treatment are generally very poor, and while the advent of CAR T-cell therapy has provided significant improvements, additional novel targeted therapies have also joined the field to further improve outcomes.

With no prior studies directly comparing outcomes between the various treatment options in a real-world setting, Dr. Rampotas and colleagues conducted a retrospective analysis of posttransplant relapsed B-ALL cases at six major transplant centers in the United Kingdom between 2010 and 2022.

Of 93 patients with sufficient data for the analysis, 17 had been treated with CAR T-cell therapy: 4 with UCART19, 1 with CD22 CAR T-cell, and 12 with the CD19-directed CAR T-cell products tisagenlecleucel (Kymriah) or obecabtagene autoleucel (obe-cel).

Among the remaining 75 patients who received non-CAR T-cell therapies, 24 received TKIs, 11 received blinatumumab, 12 received inotuzumab, 10 received intensive chemotherapy, 3 received intensive chemotherapy and TKI therapy, 14 received palliative/supportive regimens and 1 had a second allo-HCT following relapse from the first.

The median time from relapse to treatment was 2.8 months in the CAR T-cell therapy group, and 0.32 months for those receiving non-CAR T-cell therapies.

“The 2.8-month time-to-treat is quite expected as CAR T-cells can take a while to manufacture and be infused,” Dr. Rampotas noted. “This also comes with the bias that the patients who did receive them were likely fitter and could wait for that long.”

Patients receiving CAR T-cell therapy were also younger (median age 26 versus 47 in the non-CAR T-cell group) but the CAR T-cell group had higher risk disease and had a median of 2 prior lines of therapy versus 1 in the non-CAR T-cell group.

With a median follow-up of 24.8 months, patients receiving CAR T-cell therapy had significantly better rates of overall survival (OS), with 31 months compared with the non-CAR T-cell therapy OS of just 6.4 months (P = .0147).

The patients treated with CAR T-cell therapy also had improved progression-free survival (PFS) over the non-CAR T-cell patients (16.7 vs 3.7 months; P = .0001).

The superior outcomes in the CAR T-cell group remained consistent after exclusion of patients who received palliative approaches.

“In the realm of numerous innovative therapies for B-ALL, CAR Ts have now, for the first time, exhibited superior outcomes over alternative approaches in posttransplant relapsed B-ALL in the real world,” the authors reported. “The clear superior PFS and OS should encourage the use of more CAR T-cell therapies for this challenging cohort, while further improvements are imperative to enhance outcomes.”

In the meantime, “patients who relapse post transplant with B-ALL should be referred for CAR-T cell therapy as it is a superior treatment to other available options,” Dr. Rampotas said.

Dr. Rampotas discloses receiving conference fees from Gilead.

Patients with B-cell acute lymphoblastic leukemia (B-ALL) who relapse following hematopoietic stem cell transplant (allo-HCT) show significantly superior survival outcomes when treated with chimeric antigen receptor (CAR) T-cell therapy compared with other novel alternative therapies, a real-world analysis of patients in the UK shows.

“This is the first time there is a real-world comparison of CAR-T cell therapy versus other treatments in the era of other novel therapies such as inotuzumab or tyrosine kinase inhibitors (TKIs),” said first author Alexandros Rampotas, MD, of the University College London Hospital NHS Foundation Trust. “The study was looking retrospectively at patients treated in the UK, but the results should be applicable to most countries where similar treatments are available.”

Dr. Rampotas presented the research at the 6th European CAR T-cell Meeting jointly sponsored by the Society for Blood and Marrow Transplantation and the European Hematology Association.

Outcomes when patients with B-ALL relapse after allo-HCT treatment are generally very poor, and while the advent of CAR T-cell therapy has provided significant improvements, additional novel targeted therapies have also joined the field to further improve outcomes.

With no prior studies directly comparing outcomes between the various treatment options in a real-world setting, Dr. Rampotas and colleagues conducted a retrospective analysis of posttransplant relapsed B-ALL cases at six major transplant centers in the United Kingdom between 2010 and 2022.

Of 93 patients with sufficient data for the analysis, 17 had been treated with CAR T-cell therapy: 4 with UCART19, 1 with CD22 CAR T-cell, and 12 with the CD19-directed CAR T-cell products tisagenlecleucel (Kymriah) or obecabtagene autoleucel (obe-cel).

Among the remaining 75 patients who received non-CAR T-cell therapies, 24 received TKIs, 11 received blinatumumab, 12 received inotuzumab, 10 received intensive chemotherapy, 3 received intensive chemotherapy and TKI therapy, 14 received palliative/supportive regimens and 1 had a second allo-HCT following relapse from the first.

The median time from relapse to treatment was 2.8 months in the CAR T-cell therapy group, and 0.32 months for those receiving non-CAR T-cell therapies.

“The 2.8-month time-to-treat is quite expected as CAR T-cells can take a while to manufacture and be infused,” Dr. Rampotas noted. “This also comes with the bias that the patients who did receive them were likely fitter and could wait for that long.”

Patients receiving CAR T-cell therapy were also younger (median age 26 versus 47 in the non-CAR T-cell group) but the CAR T-cell group had higher risk disease and had a median of 2 prior lines of therapy versus 1 in the non-CAR T-cell group.

With a median follow-up of 24.8 months, patients receiving CAR T-cell therapy had significantly better rates of overall survival (OS), with 31 months compared with the non-CAR T-cell therapy OS of just 6.4 months (P = .0147).

The patients treated with CAR T-cell therapy also had improved progression-free survival (PFS) over the non-CAR T-cell patients (16.7 vs 3.7 months; P = .0001).

The superior outcomes in the CAR T-cell group remained consistent after exclusion of patients who received palliative approaches.

“In the realm of numerous innovative therapies for B-ALL, CAR Ts have now, for the first time, exhibited superior outcomes over alternative approaches in posttransplant relapsed B-ALL in the real world,” the authors reported. “The clear superior PFS and OS should encourage the use of more CAR T-cell therapies for this challenging cohort, while further improvements are imperative to enhance outcomes.”

In the meantime, “patients who relapse post transplant with B-ALL should be referred for CAR-T cell therapy as it is a superior treatment to other available options,” Dr. Rampotas said.

Dr. Rampotas discloses receiving conference fees from Gilead.

A simple prediction model developed with US and European cohorts shows accuracy in identifying patients with relapsed/refractory multiple myeloma (RRMM) who are or are not at high risk for relapsing after treatment with anti–B-cell maturation antigen (BCMA) chimeric antigen receptor T (CAR-T) therapy.

“To our knowledge, this large multicenter study is the first report to identify patients with RRMM at high risk of early relapse after CAR-T,” the authors report in the study, published February 15 in the Journal of Clinical Oncology.

“We saw that early relapse within 5 months from infusion was significantly associated with very poor outcomes, and disease-, treatment-, and inflammation-specific variables were independent predictors of early relapse,” first author Nico Gagelmann, MD, of the University Medical Center Hamburg-Eppendorf, in Hamburg, Germany, explained in presenting the findings at the 6th European CAR T-cell Meeting jointly sponsored by the European Society for Blood and Marrow Transplantation and the European Hematology Association. CAR-T therapy has revolutionized the treatment of RRMM, with the idecabtagene vicleucel (ide-cel) and ciltacabtagene autoleucel (cilta-cel) CAR-T therapies approved for the condition. However, the treatment is far from a cure, with nearly 50% of patients relapsing and having progression of disease within the first year after infusion, prompting a need to better understand the risk factors for who may or may not progress.

With a lack of a universal model to help with those predictions across products and populations, Dr. Gagelmann and colleagues conducted a retrospective observational study utilizing data from 136 patients at seven CAR-T centers in Europe and 133 patients at three centers in the US who had received either commercial or academically produced anti-BCMA CAR-T.

Of the patients, 171 were infused with ide-cel, 38 with cilta-cel, and 60 with an academic CAR-T therapy. The patients had a median age of 63, and extramedullary disease was more common in the US cohort (48%) versus European (35%; P = .04).

Notably, the response rates between the European and US cohorts were similar, despite various differences between the cohorts, including differences in ethnicities and a lower body mass index (BMI) in the European cohort versus US (BMI 25 vs 28, respectively; P < .001). There were also no significant differences in responses between the CAR-T treatments.

The overall response rate was 87% and was comparable between the European and US groups, with complete responses occurring among 48% of patients in Europe and 49% in the US group.

Their measurable residual disease (MRD) negativity rate at any time was 29% and 37%, respectively, and rates of complete response at day 30 were 29% and 26%, respectively. The rate of progression-free survival at 12 months was 40% for the entire cohort, with a rate of 45% in the European group and 34% in the US group (P = .09). Overall survival rates at 12 months were 79% and 65%, respectively (P = .11).

The patients had a median time to relapse of 5 months, and the 5-month incidence of relapse was identical, at 24% in each cohort.

Of those patients, overall survival at 12 months was low, at 30% in the European cohort and 14% in the US group.

“Early relapse within the first 5 months clearly identified patients with poor survival across the cohort,” Dr. Gagelmann said.

Key Risk Factors Identified

Key factors found after multivariate adjustment to be independently predictive of early relapse or progression included extramedullary disease or plasma cell leukemia, being refractory to lenalidomide, having high-risk cytogenetics, and having increased age- and sex-adjusted ferritin at the time of lymphodepletion.

With each of the risk factors valued at 1 point, the MyCARe model ranked scores of 0-1 points as low-risk, 2-3 as intermediate risk, and a score above 4 was considered high-risk.

Based on the model, the risk of early relapse within 5 months among those scored as low risk was 7%, for intermediate risk, 27% (hazard ratio [HR], 3.27 vs low-risk; P < .001), and for high risk, 53% (HR, 7.89 vs low-risk; P < .001), with outcomes overall comparable between the two geographic groups. Importantly, the model maintained utility for patients who did and did not receive salvage therapies; however, “more studies are needed to identify the optimal post–CAR-T approach,” the authors write.

Dr. Gagelmann added that older age was significantly associated with improved progression-free survival in the US cohort, with a 12-month progression-free survival of 27% among patients under 65 versus 43% for those over 65 (P = .03). However, age was not found to be associated with similar outcomes in the European cohort.

The authors note that the MyCARe model outperformed the CAR-HEMATOTOX and more recent disease-specific R2-ISS risk-stratification tools regarding prediction of relapse/progression and progression-free survival.

However, with CAR-HEMATOTOX developed to predict side effects and non-relapse mortality, “our results demonstrate that both scores independently predict different outcomes after anti–BCMA CAR-T in RRMM,” the authors report. Therefore, “they can be used complimentarily to predict complications (CAR-HEMATOTOX) and relapse/progression-free survival (MyCARe model).”

Importantly, the authors add that the tool may help in patient selection for earlier treatment.

“As ide-cel and cilta-cel have shown astonishing efficacy for earlier treatment lines, our model might also be validated for such patients,” the authors note in the study. They conclude that the study provides “the first Euro-American cartography of the efficacy and safety profile of current CAR-T, showing comparable results.”

“We also built the MyCARe model, which can predict early relapse, response, and survival and may facilitate patient selection in this very challenging setting,” the authors report.
 

Hope for Interventions Based on Patients’ Risk

Commenting on the study, Rahul Banerjee, MD, an assistant professor with the Division of Hematology and Oncology, University of Washington, Seattle, underscored that “we need more cross-border research like this in the myeloma field.”

“Clinically, my hope that this will help us tailor post–CAR-T interventions according to each patient’s risk profile,” he said.

Risk factors such as the presence of extramedullary disease, plasma cell leukemia, or high-risk cytogenetics are expected; however, Dr. Banerjee said the inclusion of increased ferritin before CAR-T was “an interesting new risk factor that we’ve also heard about from our colleagues in the lymphoma space.”

Ferritin perturbations can indicate many things, but high ferritin can be a sign of elevated inflammation at baseline,” he explained. “These patients may have a hyperinflammatory phenotype of their myeloma which can predispose T-cells to exhaustion,” Dr. Banerjee said.

“Exhausted T-cells at collection mean exhausted CAR T-cells at infusion, and so the negative prognostic significance of elevated ferritin — which we don’t always check before CAR-T — makes sense.”

While the authors suggest a potential benefit of the MyCAR3 model in identifying patients who could benefit from other novel therapies at relapse, Dr. Banerjee suggests another possibility. “I’d take this a step further and suggest future studies of this MyCARe model to identify patients who might benefit from post–CAR-T maintenance,” he said.

“The ‘one-and-done’ nature of CAR-T in terms of not requiring further myeloma therapy after infusion is a powerful benefit for patients, but there are some patients who may benefit from low-dose pomalidomide or iberdomide/mezigdomide maintenance to help keep the myeloma at bay and to promote T-cell fitness,” Dr. Banerjee explained. “This risk model may identify patients to prioritize for such types of clinical trials in the future.”

Caveats include that factors beyond the baseline features (used for the risk model) can further influence outcomes,” Dr. Banerjee noted.

“Risk stratification is inherently a dynamic process over time,” he said, questioning, for instance, “what about patients who achieve measurable residual disease negativity [MRD] at day +28 after CAR-T cell? Does the achievement of MRD negativity ‘erase’ a high-risk MyCARe score? We’ll need future studies to tell.”

An overriding take-home message for clinicians should be to simply refer eligible patients to a CAR-T capable center as soon as possible for evaluation.

“In the lymphoma world, they have a nice adage for this: ‘If they recur, you should refer,’ ” he said. “I’d suggest the same here. By no means will we move to CAR-T therapy for every patient at first relapse. However, based on their MyCARe score and other risk factors, there may be patients we prioritize for CAR-T first versus CAR-T with maintenance versus clinical trials.”

Dr. Gagelmann reported relationships with BMS, Pfizer, Stemline, MorphoSys, and Kite. Dr. Banerjee disclosed ties with BMS, Caribou Biosciences, Genentech, Janssen, Karyopharm, Pfizer, Sanofi, SparkCures, Novartis, and Pack Health.

A simple prediction model developed with US and European cohorts shows accuracy in identifying patients with relapsed/refractory multiple myeloma (RRMM) who are or are not at high risk for relapsing after treatment with anti–B-cell maturation antigen (BCMA) chimeric antigen receptor T (CAR-T) therapy.

“To our knowledge, this large multicenter study is the first report to identify patients with RRMM at high risk of early relapse after CAR-T,” the authors report in the study, published February 15 in the Journal of Clinical Oncology.

“We saw that early relapse within 5 months from infusion was significantly associated with very poor outcomes, and disease-, treatment-, and inflammation-specific variables were independent predictors of early relapse,” first author Nico Gagelmann, MD, of the University Medical Center Hamburg-Eppendorf, in Hamburg, Germany, explained in presenting the findings at the 6th European CAR T-cell Meeting jointly sponsored by the European Society for Blood and Marrow Transplantation and the European Hematology Association. CAR-T therapy has revolutionized the treatment of RRMM, with the idecabtagene vicleucel (ide-cel) and ciltacabtagene autoleucel (cilta-cel) CAR-T therapies approved for the condition. However, the treatment is far from a cure, with nearly 50% of patients relapsing and having progression of disease within the first year after infusion, prompting a need to better understand the risk factors for who may or may not progress.

With a lack of a universal model to help with those predictions across products and populations, Dr. Gagelmann and colleagues conducted a retrospective observational study utilizing data from 136 patients at seven CAR-T centers in Europe and 133 patients at three centers in the US who had received either commercial or academically produced anti-BCMA CAR-T.

Of the patients, 171 were infused with ide-cel, 38 with cilta-cel, and 60 with an academic CAR-T therapy. The patients had a median age of 63, and extramedullary disease was more common in the US cohort (48%) versus European (35%; P = .04).

Notably, the response rates between the European and US cohorts were similar, despite various differences between the cohorts, including differences in ethnicities and a lower body mass index (BMI) in the European cohort versus US (BMI 25 vs 28, respectively; P < .001). There were also no significant differences in responses between the CAR-T treatments.

The overall response rate was 87% and was comparable between the European and US groups, with complete responses occurring among 48% of patients in Europe and 49% in the US group.

Their measurable residual disease (MRD) negativity rate at any time was 29% and 37%, respectively, and rates of complete response at day 30 were 29% and 26%, respectively. The rate of progression-free survival at 12 months was 40% for the entire cohort, with a rate of 45% in the European group and 34% in the US group (P = .09). Overall survival rates at 12 months were 79% and 65%, respectively (P = .11).

The patients had a median time to relapse of 5 months, and the 5-month incidence of relapse was identical, at 24% in each cohort.

Of those patients, overall survival at 12 months was low, at 30% in the European cohort and 14% in the US group.

“Early relapse within the first 5 months clearly identified patients with poor survival across the cohort,” Dr. Gagelmann said.

Key Risk Factors Identified

Key factors found after multivariate adjustment to be independently predictive of early relapse or progression included extramedullary disease or plasma cell leukemia, being refractory to lenalidomide, having high-risk cytogenetics, and having increased age- and sex-adjusted ferritin at the time of lymphodepletion.

With each of the risk factors valued at 1 point, the MyCARe model ranked scores of 0-1 points as low-risk, 2-3 as intermediate risk, and a score above 4 was considered high-risk.

Based on the model, the risk of early relapse within 5 months among those scored as low risk was 7%, for intermediate risk, 27% (hazard ratio [HR], 3.27 vs low-risk; P < .001), and for high risk, 53% (HR, 7.89 vs low-risk; P < .001), with outcomes overall comparable between the two geographic groups. Importantly, the model maintained utility for patients who did and did not receive salvage therapies; however, “more studies are needed to identify the optimal post–CAR-T approach,” the authors write.

Dr. Gagelmann added that older age was significantly associated with improved progression-free survival in the US cohort, with a 12-month progression-free survival of 27% among patients under 65 versus 43% for those over 65 (P = .03). However, age was not found to be associated with similar outcomes in the European cohort.

The authors note that the MyCARe model outperformed the CAR-HEMATOTOX and more recent disease-specific R2-ISS risk-stratification tools regarding prediction of relapse/progression and progression-free survival.

However, with CAR-HEMATOTOX developed to predict side effects and non-relapse mortality, “our results demonstrate that both scores independently predict different outcomes after anti–BCMA CAR-T in RRMM,” the authors report. Therefore, “they can be used complimentarily to predict complications (CAR-HEMATOTOX) and relapse/progression-free survival (MyCARe model).”

Importantly, the authors add that the tool may help in patient selection for earlier treatment.

“As ide-cel and cilta-cel have shown astonishing efficacy for earlier treatment lines, our model might also be validated for such patients,” the authors note in the study. They conclude that the study provides “the first Euro-American cartography of the efficacy and safety profile of current CAR-T, showing comparable results.”

“We also built the MyCARe model, which can predict early relapse, response, and survival and may facilitate patient selection in this very challenging setting,” the authors report.
 

Hope for Interventions Based on Patients’ Risk

Commenting on the study, Rahul Banerjee, MD, an assistant professor with the Division of Hematology and Oncology, University of Washington, Seattle, underscored that “we need more cross-border research like this in the myeloma field.”

“Clinically, my hope that this will help us tailor post–CAR-T interventions according to each patient’s risk profile,” he said.

Risk factors such as the presence of extramedullary disease, plasma cell leukemia, or high-risk cytogenetics are expected; however, Dr. Banerjee said the inclusion of increased ferritin before CAR-T was “an interesting new risk factor that we’ve also heard about from our colleagues in the lymphoma space.”

Ferritin perturbations can indicate many things, but high ferritin can be a sign of elevated inflammation at baseline,” he explained. “These patients may have a hyperinflammatory phenotype of their myeloma which can predispose T-cells to exhaustion,” Dr. Banerjee said.

“Exhausted T-cells at collection mean exhausted CAR T-cells at infusion, and so the negative prognostic significance of elevated ferritin — which we don’t always check before CAR-T — makes sense.”

While the authors suggest a potential benefit of the MyCAR3 model in identifying patients who could benefit from other novel therapies at relapse, Dr. Banerjee suggests another possibility. “I’d take this a step further and suggest future studies of this MyCARe model to identify patients who might benefit from post–CAR-T maintenance,” he said.

“The ‘one-and-done’ nature of CAR-T in terms of not requiring further myeloma therapy after infusion is a powerful benefit for patients, but there are some patients who may benefit from low-dose pomalidomide or iberdomide/mezigdomide maintenance to help keep the myeloma at bay and to promote T-cell fitness,” Dr. Banerjee explained. “This risk model may identify patients to prioritize for such types of clinical trials in the future.”

Caveats include that factors beyond the baseline features (used for the risk model) can further influence outcomes,” Dr. Banerjee noted.

“Risk stratification is inherently a dynamic process over time,” he said, questioning, for instance, “what about patients who achieve measurable residual disease negativity [MRD] at day +28 after CAR-T cell? Does the achievement of MRD negativity ‘erase’ a high-risk MyCARe score? We’ll need future studies to tell.”

An overriding take-home message for clinicians should be to simply refer eligible patients to a CAR-T capable center as soon as possible for evaluation.

“In the lymphoma world, they have a nice adage for this: ‘If they recur, you should refer,’ ” he said. “I’d suggest the same here. By no means will we move to CAR-T therapy for every patient at first relapse. However, based on their MyCARe score and other risk factors, there may be patients we prioritize for CAR-T first versus CAR-T with maintenance versus clinical trials.”

Dr. Gagelmann reported relationships with BMS, Pfizer, Stemline, MorphoSys, and Kite. Dr. Banerjee disclosed ties with BMS, Caribou Biosciences, Genentech, Janssen, Karyopharm, Pfizer, Sanofi, SparkCures, Novartis, and Pack Health.

A simple prediction model developed with US and European cohorts shows accuracy in identifying patients with relapsed/refractory multiple myeloma (RRMM) who are or are not at high risk for relapsing after treatment with anti–B-cell maturation antigen (BCMA) chimeric antigen receptor T (CAR-T) therapy.

“To our knowledge, this large multicenter study is the first report to identify patients with RRMM at high risk of early relapse after CAR-T,” the authors report in the study, published February 15 in the Journal of Clinical Oncology.

“We saw that early relapse within 5 months from infusion was significantly associated with very poor outcomes, and disease-, treatment-, and inflammation-specific variables were independent predictors of early relapse,” first author Nico Gagelmann, MD, of the University Medical Center Hamburg-Eppendorf, in Hamburg, Germany, explained in presenting the findings at the 6th European CAR T-cell Meeting jointly sponsored by the European Society for Blood and Marrow Transplantation and the European Hematology Association. CAR-T therapy has revolutionized the treatment of RRMM, with the idecabtagene vicleucel (ide-cel) and ciltacabtagene autoleucel (cilta-cel) CAR-T therapies approved for the condition. However, the treatment is far from a cure, with nearly 50% of patients relapsing and having progression of disease within the first year after infusion, prompting a need to better understand the risk factors for who may or may not progress.

With a lack of a universal model to help with those predictions across products and populations, Dr. Gagelmann and colleagues conducted a retrospective observational study utilizing data from 136 patients at seven CAR-T centers in Europe and 133 patients at three centers in the US who had received either commercial or academically produced anti-BCMA CAR-T.

Of the patients, 171 were infused with ide-cel, 38 with cilta-cel, and 60 with an academic CAR-T therapy. The patients had a median age of 63, and extramedullary disease was more common in the US cohort (48%) versus European (35%; P = .04).

Notably, the response rates between the European and US cohorts were similar, despite various differences between the cohorts, including differences in ethnicities and a lower body mass index (BMI) in the European cohort versus US (BMI 25 vs 28, respectively; P < .001). There were also no significant differences in responses between the CAR-T treatments.

The overall response rate was 87% and was comparable between the European and US groups, with complete responses occurring among 48% of patients in Europe and 49% in the US group.

Their measurable residual disease (MRD) negativity rate at any time was 29% and 37%, respectively, and rates of complete response at day 30 were 29% and 26%, respectively. The rate of progression-free survival at 12 months was 40% for the entire cohort, with a rate of 45% in the European group and 34% in the US group (P = .09). Overall survival rates at 12 months were 79% and 65%, respectively (P = .11).

The patients had a median time to relapse of 5 months, and the 5-month incidence of relapse was identical, at 24% in each cohort.

Of those patients, overall survival at 12 months was low, at 30% in the European cohort and 14% in the US group.

“Early relapse within the first 5 months clearly identified patients with poor survival across the cohort,” Dr. Gagelmann said.

Key Risk Factors Identified

Key factors found after multivariate adjustment to be independently predictive of early relapse or progression included extramedullary disease or plasma cell leukemia, being refractory to lenalidomide, having high-risk cytogenetics, and having increased age- and sex-adjusted ferritin at the time of lymphodepletion.

With each of the risk factors valued at 1 point, the MyCARe model ranked scores of 0-1 points as low-risk, 2-3 as intermediate risk, and a score above 4 was considered high-risk.

Based on the model, the risk of early relapse within 5 months among those scored as low risk was 7%, for intermediate risk, 27% (hazard ratio [HR], 3.27 vs low-risk; P < .001), and for high risk, 53% (HR, 7.89 vs low-risk; P < .001), with outcomes overall comparable between the two geographic groups. Importantly, the model maintained utility for patients who did and did not receive salvage therapies; however, “more studies are needed to identify the optimal post–CAR-T approach,” the authors write.

Dr. Gagelmann added that older age was significantly associated with improved progression-free survival in the US cohort, with a 12-month progression-free survival of 27% among patients under 65 versus 43% for those over 65 (P = .03). However, age was not found to be associated with similar outcomes in the European cohort.

The authors note that the MyCARe model outperformed the CAR-HEMATOTOX and more recent disease-specific R2-ISS risk-stratification tools regarding prediction of relapse/progression and progression-free survival.

However, with CAR-HEMATOTOX developed to predict side effects and non-relapse mortality, “our results demonstrate that both scores independently predict different outcomes after anti–BCMA CAR-T in RRMM,” the authors report. Therefore, “they can be used complimentarily to predict complications (CAR-HEMATOTOX) and relapse/progression-free survival (MyCARe model).”

Importantly, the authors add that the tool may help in patient selection for earlier treatment.

“As ide-cel and cilta-cel have shown astonishing efficacy for earlier treatment lines, our model might also be validated for such patients,” the authors note in the study. They conclude that the study provides “the first Euro-American cartography of the efficacy and safety profile of current CAR-T, showing comparable results.”

“We also built the MyCARe model, which can predict early relapse, response, and survival and may facilitate patient selection in this very challenging setting,” the authors report.
 

Hope for Interventions Based on Patients’ Risk

Commenting on the study, Rahul Banerjee, MD, an assistant professor with the Division of Hematology and Oncology, University of Washington, Seattle, underscored that “we need more cross-border research like this in the myeloma field.”

“Clinically, my hope that this will help us tailor post–CAR-T interventions according to each patient’s risk profile,” he said.

Risk factors such as the presence of extramedullary disease, plasma cell leukemia, or high-risk cytogenetics are expected; however, Dr. Banerjee said the inclusion of increased ferritin before CAR-T was “an interesting new risk factor that we’ve also heard about from our colleagues in the lymphoma space.”

Ferritin perturbations can indicate many things, but high ferritin can be a sign of elevated inflammation at baseline,” he explained. “These patients may have a hyperinflammatory phenotype of their myeloma which can predispose T-cells to exhaustion,” Dr. Banerjee said.

“Exhausted T-cells at collection mean exhausted CAR T-cells at infusion, and so the negative prognostic significance of elevated ferritin — which we don’t always check before CAR-T — makes sense.”

While the authors suggest a potential benefit of the MyCAR3 model in identifying patients who could benefit from other novel therapies at relapse, Dr. Banerjee suggests another possibility. “I’d take this a step further and suggest future studies of this MyCARe model to identify patients who might benefit from post–CAR-T maintenance,” he said.

“The ‘one-and-done’ nature of CAR-T in terms of not requiring further myeloma therapy after infusion is a powerful benefit for patients, but there are some patients who may benefit from low-dose pomalidomide or iberdomide/mezigdomide maintenance to help keep the myeloma at bay and to promote T-cell fitness,” Dr. Banerjee explained. “This risk model may identify patients to prioritize for such types of clinical trials in the future.”

Caveats include that factors beyond the baseline features (used for the risk model) can further influence outcomes,” Dr. Banerjee noted.

“Risk stratification is inherently a dynamic process over time,” he said, questioning, for instance, “what about patients who achieve measurable residual disease negativity [MRD] at day +28 after CAR-T cell? Does the achievement of MRD negativity ‘erase’ a high-risk MyCARe score? We’ll need future studies to tell.”

An overriding take-home message for clinicians should be to simply refer eligible patients to a CAR-T capable center as soon as possible for evaluation.

“In the lymphoma world, they have a nice adage for this: ‘If they recur, you should refer,’ ” he said. “I’d suggest the same here. By no means will we move to CAR-T therapy for every patient at first relapse. However, based on their MyCARe score and other risk factors, there may be patients we prioritize for CAR-T first versus CAR-T with maintenance versus clinical trials.”

Dr. Gagelmann reported relationships with BMS, Pfizer, Stemline, MorphoSys, and Kite. Dr. Banerjee disclosed ties with BMS, Caribou Biosciences, Genentech, Janssen, Karyopharm, Pfizer, Sanofi, SparkCures, Novartis, and Pack Health.

This article was originally published on February 10 in Eric Topol’s substack “Ground Truths.”

It’s astounding how devious cancer cells and tumor tissue can be. This week in Science we learned how certain lung cancer cells can function like “Catch Me If You Can” — changing their driver mutation and cell identity to escape targeted therapy. This histologic transformation, as seen in an experimental model, is just one of so many cancer tricks that we are learning about.

Recently, as shown by single-cell sequencing, cancer cells can steal the mitochondria from T cells, a double whammy that turbocharges cancer cells with the hijacked fuel supply and, at the same time, dismantles the immune response.

Last week, we saw how tumor cells can release a virus-like protein that unleashes a vicious autoimmune response.

And then there’s the finding that cancer cell spread predominantly is occurring while we sleep.

As I previously reviewed, the ability for cancer cells to hijack neurons and neural circuits is now well established, no less their ability to reprogram neurons to become adrenergic and stimulate tumor progression, and interfere with the immune response. Stay tuned on that for a new Ground Truths podcast with Prof Michelle Monje, a leader in cancer neuroscience, which will post soon.

Add advancing age’s immunosenescence as yet another challenge to the long and growing list of formidable ways that cancer cells, and the tumor microenvironment, evade our immune response.

An Ever-Expanding Armamentarium

All of this is telling us how we need to ramp up our game if we are going to be able to use our immune system to quash a cancer. Fortunately, we have abundant and ever-growing capabilities for doing just that.

Immune Checkpoint Inhibitors

The field of immunotherapies took off with the immune checkpoint inhibitors, first approved by the FDA in 2011, that take the brakes off of T cells, with the programmed death-1 (PD-1), PD-ligand1, and anti-CTLA-4 monoclonal antibodies.

But we’re clearly learning they are not enough to prevail over cancer with common recurrences, only short term success in most patients, with some notable exceptions. Adding other immune response strategies, such as a vaccine, or antibody-drug conjugates, or engineered T cells, are showing improved chances for success.

Therapeutic Cancer Vaccines

There are many therapeutic cancer vaccines in the works, as reviewed in depth here.

Here’s a list of ongoing clinical trials of cancer vaccines. You’ll note most of these are on top of a checkpoint inhibitor and use personalized neoantigens (cancer cell surface proteins) derived from sequencing (whole-exome or whole genome, RNA-sequencing and HLA-profiling) the patient’s tumor.

An example of positive findings is with the combination of an mRNA-nanoparticle vaccine with up to 34 personalized neoantigens and pembrolizumab (Keytruda) vs pembrolizumab alone in advanced melanoma after resection, with improved outcomes at 3-year follow-up, cutting death or relapse rate in half.

Antibody-Drug Conjugates (ADC)

There is considerable excitement about antibody-drug conjugates (ADC) whereby a linker is used to attach a chemotherapy agent to the checkpoint inhibitor antibody, specifically targeting the cancer cell and facilitating entry of the chemotherapy into the cell. Akin to these are bispecific antibodies (BiTEs, binding to a tumor antigen and T cell receptor simultaneously), both of these conjugates acting as “biologic” or “guided” missiles.

A very good example of the potency of an ADC was seen in a “HER2-low” breast cancer randomized trial. The absence or very low expression or amplification of the HER2 receptor is common in breast cancer and successful treatment has been elusive. A randomized trial of an ADC (trastuzumab deruxtecan) compared to physician’s choice therapy demonstrated a marked success for progression-free survival in HER2-low patients, which was characterized as “unheard-of success” by media coverage.

This strategy is being used to target some of the most difficult cancer driver mutations such as TP53 and KRAS.

Oncolytic Viruses

Modifying viruses to infect the tumor and make it more visible to the immune system, potentiating anti-tumor responses, known as oncolytic viruses, have been proposed as a way to rev up the immune response for a long time but without positive Phase 3 clinical trials.

After decades of failure, a recent trial in refractory bladder cancer showed marked success, along with others, summarized here, now providing very encouraging results. It looks like oncolytic viruses are on a comeback path.

Engineering T Cells (Chimeric Antigen Receptor [CAR-T])

As I recently reviewed, there are over 500 ongoing clinical trials to build on the success of the first CAR-T approval for leukemia 7 years ago. I won’t go through that all again here, but to reiterate most of the success to date has been in “liquid” blood (leukemia and lymphoma) cancer tumors. This week in Nature is the discovery of a T cell cancer mutation, a gene fusion CARD11-PIK3R3, from a T cell lymphoma that can potentially be used to augment CAR-T efficacy. It has pronounced and prolonged effects in the experimental model. Instead of 1 million cells needed for treatment, even 20,000 were enough to melt the tumor. This is a noteworthy discovery since CAR-T work to date has largely not exploited such naturally occurring mutations, while instead concentrating on those seen in the patient’s set of key tumor mutations.

As currently conceived, CAR-T, and what is being referred to more broadly as adoptive cell therapies, involves removing T cells from the patient’s body and engineering their activation, then reintroducing them back to the patient. This is laborious, technically difficult, and very expensive. Recently, the idea of achieving all of this via an injection of virus that specifically infects T cells and inserts the genes needed, was advanced by two biotech companies with preclinical results, one in non-human primates.

Gearing up to meet the challenge of solid tumor CAR-T intervention, there’s more work using CRISPR genome editing of T cell receptors. A.I. is increasingly being exploited to process the data from sequencing and identify optimal neoantigens.

Instead of just CAR-T, we’re seeing the emergence of CAR-macrophage and CAR-natural killer (NK) cells strategies, and rapidly expanding potential combinations of all the strategies I’ve mentioned. No less, there’s been maturation of on-off suicide switches programmed in, to limit cytokine release and promote safety of these interventions. Overall, major side effects of immunotherapies are not only cytokine release syndromes, but also include interstitial pneumonitis and neurotoxicity.

Summary

Given the multitude of ways cancer cells and tumor tissue can evade our immune response, durably successful treatment remains a daunting challenge. But the ingenuity of so many different approaches to unleash our immune response, and their combinations, provides considerable hope that we’ll increasingly meet the challenge in the years ahead. We have clearly learned that combining different immunotherapy strategies will be essential for many patients with the most resilient solid tumors.

Of concern, as noted by a recent editorial in The Lancet, entitled “Cancer Research Equity: Innovations For The Many, Not The Few,” is that these individualized, sophisticated strategies are not scalable; they will have limited reach and benefit. The movement towards “off the shelf” CAR-T and inexpensive, orally active checkpoint inhibitors may help mitigate this issue.

Notwithstanding this important concern, we’re seeing an array of diverse and potent immunotherapy strategies that are providing highly encouraging results, engendering more excitement than we’ve seen in this space for some time. These should propel substantial improvements in outcomes for patients in the years ahead. It can’t happen soon enough.

Thanks for reading this edition of Ground Truths. If you found it informative, please share it with your colleagues.

Dr. Topol has disclosed the following relevant financial relationships: Serve(d) as a director, officer, partner, employee, advisor, consultant, or trustee for Dexcom; Illumina; Molecular Stethoscope; Quest Diagnostics; Blue Cross Blue Shield Association. Received research grant from National Institutes of Health.

A version of this article appeared on Medscape.com.

This article was originally published on February 10 in Eric Topol’s substack “Ground Truths.”

It’s astounding how devious cancer cells and tumor tissue can be. This week in Science we learned how certain lung cancer cells can function like “Catch Me If You Can” — changing their driver mutation and cell identity to escape targeted therapy. This histologic transformation, as seen in an experimental model, is just one of so many cancer tricks that we are learning about.

Recently, as shown by single-cell sequencing, cancer cells can steal the mitochondria from T cells, a double whammy that turbocharges cancer cells with the hijacked fuel supply and, at the same time, dismantles the immune response.

Last week, we saw how tumor cells can release a virus-like protein that unleashes a vicious autoimmune response.

And then there’s the finding that cancer cell spread predominantly is occurring while we sleep.

As I previously reviewed, the ability for cancer cells to hijack neurons and neural circuits is now well established, no less their ability to reprogram neurons to become adrenergic and stimulate tumor progression, and interfere with the immune response. Stay tuned on that for a new Ground Truths podcast with Prof Michelle Monje, a leader in cancer neuroscience, which will post soon.

Add advancing age’s immunosenescence as yet another challenge to the long and growing list of formidable ways that cancer cells, and the tumor microenvironment, evade our immune response.

An Ever-Expanding Armamentarium

All of this is telling us how we need to ramp up our game if we are going to be able to use our immune system to quash a cancer. Fortunately, we have abundant and ever-growing capabilities for doing just that.

Immune Checkpoint Inhibitors

The field of immunotherapies took off with the immune checkpoint inhibitors, first approved by the FDA in 2011, that take the brakes off of T cells, with the programmed death-1 (PD-1), PD-ligand1, and anti-CTLA-4 monoclonal antibodies.

But we’re clearly learning they are not enough to prevail over cancer with common recurrences, only short term success in most patients, with some notable exceptions. Adding other immune response strategies, such as a vaccine, or antibody-drug conjugates, or engineered T cells, are showing improved chances for success.

Therapeutic Cancer Vaccines

There are many therapeutic cancer vaccines in the works, as reviewed in depth here.

Here’s a list of ongoing clinical trials of cancer vaccines. You’ll note most of these are on top of a checkpoint inhibitor and use personalized neoantigens (cancer cell surface proteins) derived from sequencing (whole-exome or whole genome, RNA-sequencing and HLA-profiling) the patient’s tumor.

An example of positive findings is with the combination of an mRNA-nanoparticle vaccine with up to 34 personalized neoantigens and pembrolizumab (Keytruda) vs pembrolizumab alone in advanced melanoma after resection, with improved outcomes at 3-year follow-up, cutting death or relapse rate in half.

Antibody-Drug Conjugates (ADC)

There is considerable excitement about antibody-drug conjugates (ADC) whereby a linker is used to attach a chemotherapy agent to the checkpoint inhibitor antibody, specifically targeting the cancer cell and facilitating entry of the chemotherapy into the cell. Akin to these are bispecific antibodies (BiTEs, binding to a tumor antigen and T cell receptor simultaneously), both of these conjugates acting as “biologic” or “guided” missiles.

A very good example of the potency of an ADC was seen in a “HER2-low” breast cancer randomized trial. The absence or very low expression or amplification of the HER2 receptor is common in breast cancer and successful treatment has been elusive. A randomized trial of an ADC (trastuzumab deruxtecan) compared to physician’s choice therapy demonstrated a marked success for progression-free survival in HER2-low patients, which was characterized as “unheard-of success” by media coverage.

This strategy is being used to target some of the most difficult cancer driver mutations such as TP53 and KRAS.

Oncolytic Viruses

Modifying viruses to infect the tumor and make it more visible to the immune system, potentiating anti-tumor responses, known as oncolytic viruses, have been proposed as a way to rev up the immune response for a long time but without positive Phase 3 clinical trials.

After decades of failure, a recent trial in refractory bladder cancer showed marked success, along with others, summarized here, now providing very encouraging results. It looks like oncolytic viruses are on a comeback path.

Engineering T Cells (Chimeric Antigen Receptor [CAR-T])

As I recently reviewed, there are over 500 ongoing clinical trials to build on the success of the first CAR-T approval for leukemia 7 years ago. I won’t go through that all again here, but to reiterate most of the success to date has been in “liquid” blood (leukemia and lymphoma) cancer tumors. This week in Nature is the discovery of a T cell cancer mutation, a gene fusion CARD11-PIK3R3, from a T cell lymphoma that can potentially be used to augment CAR-T efficacy. It has pronounced and prolonged effects in the experimental model. Instead of 1 million cells needed for treatment, even 20,000 were enough to melt the tumor. This is a noteworthy discovery since CAR-T work to date has largely not exploited such naturally occurring mutations, while instead concentrating on those seen in the patient’s set of key tumor mutations.

As currently conceived, CAR-T, and what is being referred to more broadly as adoptive cell therapies, involves removing T cells from the patient’s body and engineering their activation, then reintroducing them back to the patient. This is laborious, technically difficult, and very expensive. Recently, the idea of achieving all of this via an injection of virus that specifically infects T cells and inserts the genes needed, was advanced by two biotech companies with preclinical results, one in non-human primates.

Gearing up to meet the challenge of solid tumor CAR-T intervention, there’s more work using CRISPR genome editing of T cell receptors. A.I. is increasingly being exploited to process the data from sequencing and identify optimal neoantigens.

Instead of just CAR-T, we’re seeing the emergence of CAR-macrophage and CAR-natural killer (NK) cells strategies, and rapidly expanding potential combinations of all the strategies I’ve mentioned. No less, there’s been maturation of on-off suicide switches programmed in, to limit cytokine release and promote safety of these interventions. Overall, major side effects of immunotherapies are not only cytokine release syndromes, but also include interstitial pneumonitis and neurotoxicity.

Summary

Given the multitude of ways cancer cells and tumor tissue can evade our immune response, durably successful treatment remains a daunting challenge. But the ingenuity of so many different approaches to unleash our immune response, and their combinations, provides considerable hope that we’ll increasingly meet the challenge in the years ahead. We have clearly learned that combining different immunotherapy strategies will be essential for many patients with the most resilient solid tumors.

Of concern, as noted by a recent editorial in The Lancet, entitled “Cancer Research Equity: Innovations For The Many, Not The Few,” is that these individualized, sophisticated strategies are not scalable; they will have limited reach and benefit. The movement towards “off the shelf” CAR-T and inexpensive, orally active checkpoint inhibitors may help mitigate this issue.

Notwithstanding this important concern, we’re seeing an array of diverse and potent immunotherapy strategies that are providing highly encouraging results, engendering more excitement than we’ve seen in this space for some time. These should propel substantial improvements in outcomes for patients in the years ahead. It can’t happen soon enough.

Thanks for reading this edition of Ground Truths. If you found it informative, please share it with your colleagues.

Dr. Topol has disclosed the following relevant financial relationships: Serve(d) as a director, officer, partner, employee, advisor, consultant, or trustee for Dexcom; Illumina; Molecular Stethoscope; Quest Diagnostics; Blue Cross Blue Shield Association. Received research grant from National Institutes of Health.

A version of this article appeared on Medscape.com.

This article was originally published on February 10 in Eric Topol’s substack “Ground Truths.”

It’s astounding how devious cancer cells and tumor tissue can be. This week in Science we learned how certain lung cancer cells can function like “Catch Me If You Can” — changing their driver mutation and cell identity to escape targeted therapy. This histologic transformation, as seen in an experimental model, is just one of so many cancer tricks that we are learning about.

Recently, as shown by single-cell sequencing, cancer cells can steal the mitochondria from T cells, a double whammy that turbocharges cancer cells with the hijacked fuel supply and, at the same time, dismantles the immune response.

Last week, we saw how tumor cells can release a virus-like protein that unleashes a vicious autoimmune response.

And then there’s the finding that cancer cell spread predominantly is occurring while we sleep.

As I previously reviewed, the ability for cancer cells to hijack neurons and neural circuits is now well established, no less their ability to reprogram neurons to become adrenergic and stimulate tumor progression, and interfere with the immune response. Stay tuned on that for a new Ground Truths podcast with Prof Michelle Monje, a leader in cancer neuroscience, which will post soon.

Add advancing age’s immunosenescence as yet another challenge to the long and growing list of formidable ways that cancer cells, and the tumor microenvironment, evade our immune response.

An Ever-Expanding Armamentarium

All of this is telling us how we need to ramp up our game if we are going to be able to use our immune system to quash a cancer. Fortunately, we have abundant and ever-growing capabilities for doing just that.

Immune Checkpoint Inhibitors

The field of immunotherapies took off with the immune checkpoint inhibitors, first approved by the FDA in 2011, that take the brakes off of T cells, with the programmed death-1 (PD-1), PD-ligand1, and anti-CTLA-4 monoclonal antibodies.

But we’re clearly learning they are not enough to prevail over cancer with common recurrences, only short term success in most patients, with some notable exceptions. Adding other immune response strategies, such as a vaccine, or antibody-drug conjugates, or engineered T cells, are showing improved chances for success.

Therapeutic Cancer Vaccines

There are many therapeutic cancer vaccines in the works, as reviewed in depth here.

Here’s a list of ongoing clinical trials of cancer vaccines. You’ll note most of these are on top of a checkpoint inhibitor and use personalized neoantigens (cancer cell surface proteins) derived from sequencing (whole-exome or whole genome, RNA-sequencing and HLA-profiling) the patient’s tumor.

An example of positive findings is with the combination of an mRNA-nanoparticle vaccine with up to 34 personalized neoantigens and pembrolizumab (Keytruda) vs pembrolizumab alone in advanced melanoma after resection, with improved outcomes at 3-year follow-up, cutting death or relapse rate in half.

Antibody-Drug Conjugates (ADC)

There is considerable excitement about antibody-drug conjugates (ADC) whereby a linker is used to attach a chemotherapy agent to the checkpoint inhibitor antibody, specifically targeting the cancer cell and facilitating entry of the chemotherapy into the cell. Akin to these are bispecific antibodies (BiTEs, binding to a tumor antigen and T cell receptor simultaneously), both of these conjugates acting as “biologic” or “guided” missiles.

A very good example of the potency of an ADC was seen in a “HER2-low” breast cancer randomized trial. The absence or very low expression or amplification of the HER2 receptor is common in breast cancer and successful treatment has been elusive. A randomized trial of an ADC (trastuzumab deruxtecan) compared to physician’s choice therapy demonstrated a marked success for progression-free survival in HER2-low patients, which was characterized as “unheard-of success” by media coverage.

This strategy is being used to target some of the most difficult cancer driver mutations such as TP53 and KRAS.

Oncolytic Viruses

Modifying viruses to infect the tumor and make it more visible to the immune system, potentiating anti-tumor responses, known as oncolytic viruses, have been proposed as a way to rev up the immune response for a long time but without positive Phase 3 clinical trials.

After decades of failure, a recent trial in refractory bladder cancer showed marked success, along with others, summarized here, now providing very encouraging results. It looks like oncolytic viruses are on a comeback path.

Engineering T Cells (Chimeric Antigen Receptor [CAR-T])

As I recently reviewed, there are over 500 ongoing clinical trials to build on the success of the first CAR-T approval for leukemia 7 years ago. I won’t go through that all again here, but to reiterate most of the success to date has been in “liquid” blood (leukemia and lymphoma) cancer tumors. This week in Nature is the discovery of a T cell cancer mutation, a gene fusion CARD11-PIK3R3, from a T cell lymphoma that can potentially be used to augment CAR-T efficacy. It has pronounced and prolonged effects in the experimental model. Instead of 1 million cells needed for treatment, even 20,000 were enough to melt the tumor. This is a noteworthy discovery since CAR-T work to date has largely not exploited such naturally occurring mutations, while instead concentrating on those seen in the patient’s set of key tumor mutations.

As currently conceived, CAR-T, and what is being referred to more broadly as adoptive cell therapies, involves removing T cells from the patient’s body and engineering their activation, then reintroducing them back to the patient. This is laborious, technically difficult, and very expensive. Recently, the idea of achieving all of this via an injection of virus that specifically infects T cells and inserts the genes needed, was advanced by two biotech companies with preclinical results, one in non-human primates.

Gearing up to meet the challenge of solid tumor CAR-T intervention, there’s more work using CRISPR genome editing of T cell receptors. A.I. is increasingly being exploited to process the data from sequencing and identify optimal neoantigens.

Instead of just CAR-T, we’re seeing the emergence of CAR-macrophage and CAR-natural killer (NK) cells strategies, and rapidly expanding potential combinations of all the strategies I’ve mentioned. No less, there’s been maturation of on-off suicide switches programmed in, to limit cytokine release and promote safety of these interventions. Overall, major side effects of immunotherapies are not only cytokine release syndromes, but also include interstitial pneumonitis and neurotoxicity.

Summary

Given the multitude of ways cancer cells and tumor tissue can evade our immune response, durably successful treatment remains a daunting challenge. But the ingenuity of so many different approaches to unleash our immune response, and their combinations, provides considerable hope that we’ll increasingly meet the challenge in the years ahead. We have clearly learned that combining different immunotherapy strategies will be essential for many patients with the most resilient solid tumors.

Of concern, as noted by a recent editorial in The Lancet, entitled “Cancer Research Equity: Innovations For The Many, Not The Few,” is that these individualized, sophisticated strategies are not scalable; they will have limited reach and benefit. The movement towards “off the shelf” CAR-T and inexpensive, orally active checkpoint inhibitors may help mitigate this issue.

Notwithstanding this important concern, we’re seeing an array of diverse and potent immunotherapy strategies that are providing highly encouraging results, engendering more excitement than we’ve seen in this space for some time. These should propel substantial improvements in outcomes for patients in the years ahead. It can’t happen soon enough.

Thanks for reading this edition of Ground Truths. If you found it informative, please share it with your colleagues.

Dr. Topol has disclosed the following relevant financial relationships: Serve(d) as a director, officer, partner, employee, advisor, consultant, or trustee for Dexcom; Illumina; Molecular Stethoscope; Quest Diagnostics; Blue Cross Blue Shield Association. Received research grant from National Institutes of Health.

A version of this article appeared on Medscape.com.