Aggressive Lymphomas

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.

SAN DIEGO — Median progression-free survival (PFS) improved by about 10 months in patients with relapsed/refractory mantle cell lymphoma (MCL) who were treated with both ibrutinib (Imbruvica) and venetoclax (Venclexta) vs. ibrutinib alone, an interim analysis of a new study finds. However, there was a statistically significant difference in overall survival between the groups.

Still, “in the countries where ibrutinib is indicated, this combination should be a new standard therapy for relapsed/refractory mantle cell lymphoma,” Michael Wang, MD, of the University of Texas MD Anderson Cancer Center, Houston, said in a media briefing at the annual meeting of the American Society of Hematology.

Its use would be off label, according to the authors of the industry-funded trial, because no nation has approved the combination therapy for MCL, a rare, aggressive form of non-Hodgkin lymphoma.

As Dr. Wang noted, ibrutinib (a Bruton tyrosine kinase inhibitor) is approved by the Food and Drug Administration to treat MCL, while venetoclax (a BCL-2 inhibitor) is approved for chronic lymphocytic leukemia and previously untreated acute myeloid leukemia. “The combination of these two agents leverages complementary modes of action and has demonstrated synergistic anti-tumor activity in preclinical models of mantle cell lymphoma,” he said. And “in patients with relapsed/refractory mantle cell lymphoma, promising clinical activity has also been observed in early-phase studies.”

For the multinational, randomized, phase 3, double-blind SYMPATICO study, researchers assigned 267 adults with relapsed/refractory MCL after 1-5 prior therapies 1:1 to receive oral ibrutinib 560 mg daily with oral venetoclax (standard 5-wk ramp-up to a target dose of 400 mg once daily) or placebo for 2 years. Then they continued with ibrutinib alone until progressive disease or unacceptable toxicity.

The study began in 2017. The median age of patients was 68, and the numbers of patients in each group were 134 (both drugs) and 133 (ibrutinib plus placebo).

At a median of 51.2 months, median PFS — the primary endpoint — was higher in the combination group vs. ibrutinib alone (31.9 vs. 22.1 months, hazard ratio [HR]=0.65, 95% CI, 0.47–0.88, P = .0052). While overall survival was higher in the combination group vs. ibrutinib alone, an interim analysis found that the difference was not statistically significant (44.9 months vs. 38.6 months, 95% CI, HR = 0.85, 0.62-1.19, P = .3465).

When questioned about this finding at the ASH news briefing, Dr. Wang said that 170 events are needed for a full overall survival analysis, and there are just 144 now. The study may reach that point in early 2025, he said.

Over a median treatment duration of 22.0 months for the combination treatment and 17.7 months for ibrutinib alone, grade ≥ 3 adverse events occurred in 84% and 76% of patients, respectively. At 60%, the level of serious adverse events was the same in both groups.

In an interview, Brian T. Hill, MD, PhD, of Cleveland Clinic, noted that in general, MCL “has a pretty relentless pattern of relapses and disease progression without an easy cure in the vast majority of patients.”

Ibrutinib has revolutionized treatment over the past decade with generally manageable side effects, and clinicians are now turning to other Bruton tyrosine kinase inhibitors, he said. Still, “there is a need for improving the durability and the response rates second-line treatment or beyond,” Dr. Hill said.

The new study is important since it’s the first randomized trial “that demonstrates that additional venetoclax significantly improves not only response rates, but also progression-free survival with a trend toward overall survival,” he said. “The toxicity profile doesn’t really seem to be significantly more worse than what we might expect with each agent given individually.”

However, Dr. Hill noted that “it’s a relatively small study and relatively short follow-up.”

It may be difficult to get an ibrutinib-venetoclax combination approved today since ibrutinib is no longer the preferred Bruton tyrosine kinase inhibitor for clinicians, he said.

Pharmacyclics, maker of ibrutinib, is the study sponsor and Janssen is a collaborator.

Dr. Wang reports research funding Acerta Pharma, AstraZeneca, BeiGene, BioInvent, Celgene, Genentech, Innocare, Janssen, Juno Therapeutics, Kite Pharma, Lilly, Loxo Oncology, Molecular Templates, Oncternal, Pharmacyclics, and VelosBio. Other authors report multiple and various relationships with industry. Dr. Hill discloses research funding and consulting relationships with Pharmacyclics, AbbVie, BeiGene, and AstraZeneca.

SAN DIEGO — Median progression-free survival (PFS) improved by about 10 months in patients with relapsed/refractory mantle cell lymphoma (MCL) who were treated with both ibrutinib (Imbruvica) and venetoclax (Venclexta) vs. ibrutinib alone, an interim analysis of a new study finds. However, there was a statistically significant difference in overall survival between the groups.

Still, “in the countries where ibrutinib is indicated, this combination should be a new standard therapy for relapsed/refractory mantle cell lymphoma,” Michael Wang, MD, of the University of Texas MD Anderson Cancer Center, Houston, said in a media briefing at the annual meeting of the American Society of Hematology.

Its use would be off label, according to the authors of the industry-funded trial, because no nation has approved the combination therapy for MCL, a rare, aggressive form of non-Hodgkin lymphoma.

As Dr. Wang noted, ibrutinib (a Bruton tyrosine kinase inhibitor) is approved by the Food and Drug Administration to treat MCL, while venetoclax (a BCL-2 inhibitor) is approved for chronic lymphocytic leukemia and previously untreated acute myeloid leukemia. “The combination of these two agents leverages complementary modes of action and has demonstrated synergistic anti-tumor activity in preclinical models of mantle cell lymphoma,” he said. And “in patients with relapsed/refractory mantle cell lymphoma, promising clinical activity has also been observed in early-phase studies.”

For the multinational, randomized, phase 3, double-blind SYMPATICO study, researchers assigned 267 adults with relapsed/refractory MCL after 1-5 prior therapies 1:1 to receive oral ibrutinib 560 mg daily with oral venetoclax (standard 5-wk ramp-up to a target dose of 400 mg once daily) or placebo for 2 years. Then they continued with ibrutinib alone until progressive disease or unacceptable toxicity.

The study began in 2017. The median age of patients was 68, and the numbers of patients in each group were 134 (both drugs) and 133 (ibrutinib plus placebo).

At a median of 51.2 months, median PFS — the primary endpoint — was higher in the combination group vs. ibrutinib alone (31.9 vs. 22.1 months, hazard ratio [HR]=0.65, 95% CI, 0.47–0.88, P = .0052). While overall survival was higher in the combination group vs. ibrutinib alone, an interim analysis found that the difference was not statistically significant (44.9 months vs. 38.6 months, 95% CI, HR = 0.85, 0.62-1.19, P = .3465).

When questioned about this finding at the ASH news briefing, Dr. Wang said that 170 events are needed for a full overall survival analysis, and there are just 144 now. The study may reach that point in early 2025, he said.

Over a median treatment duration of 22.0 months for the combination treatment and 17.7 months for ibrutinib alone, grade ≥ 3 adverse events occurred in 84% and 76% of patients, respectively. At 60%, the level of serious adverse events was the same in both groups.

In an interview, Brian T. Hill, MD, PhD, of Cleveland Clinic, noted that in general, MCL “has a pretty relentless pattern of relapses and disease progression without an easy cure in the vast majority of patients.”

Ibrutinib has revolutionized treatment over the past decade with generally manageable side effects, and clinicians are now turning to other Bruton tyrosine kinase inhibitors, he said. Still, “there is a need for improving the durability and the response rates second-line treatment or beyond,” Dr. Hill said.

The new study is important since it’s the first randomized trial “that demonstrates that additional venetoclax significantly improves not only response rates, but also progression-free survival with a trend toward overall survival,” he said. “The toxicity profile doesn’t really seem to be significantly more worse than what we might expect with each agent given individually.”

However, Dr. Hill noted that “it’s a relatively small study and relatively short follow-up.”

It may be difficult to get an ibrutinib-venetoclax combination approved today since ibrutinib is no longer the preferred Bruton tyrosine kinase inhibitor for clinicians, he said.

Pharmacyclics, maker of ibrutinib, is the study sponsor and Janssen is a collaborator.

Dr. Wang reports research funding Acerta Pharma, AstraZeneca, BeiGene, BioInvent, Celgene, Genentech, Innocare, Janssen, Juno Therapeutics, Kite Pharma, Lilly, Loxo Oncology, Molecular Templates, Oncternal, Pharmacyclics, and VelosBio. Other authors report multiple and various relationships with industry. Dr. Hill discloses research funding and consulting relationships with Pharmacyclics, AbbVie, BeiGene, and AstraZeneca.

SAN DIEGO — Median progression-free survival (PFS) improved by about 10 months in patients with relapsed/refractory mantle cell lymphoma (MCL) who were treated with both ibrutinib (Imbruvica) and venetoclax (Venclexta) vs. ibrutinib alone, an interim analysis of a new study finds. However, there was a statistically significant difference in overall survival between the groups.

Still, “in the countries where ibrutinib is indicated, this combination should be a new standard therapy for relapsed/refractory mantle cell lymphoma,” Michael Wang, MD, of the University of Texas MD Anderson Cancer Center, Houston, said in a media briefing at the annual meeting of the American Society of Hematology.

Its use would be off label, according to the authors of the industry-funded trial, because no nation has approved the combination therapy for MCL, a rare, aggressive form of non-Hodgkin lymphoma.

As Dr. Wang noted, ibrutinib (a Bruton tyrosine kinase inhibitor) is approved by the Food and Drug Administration to treat MCL, while venetoclax (a BCL-2 inhibitor) is approved for chronic lymphocytic leukemia and previously untreated acute myeloid leukemia. “The combination of these two agents leverages complementary modes of action and has demonstrated synergistic anti-tumor activity in preclinical models of mantle cell lymphoma,” he said. And “in patients with relapsed/refractory mantle cell lymphoma, promising clinical activity has also been observed in early-phase studies.”

For the multinational, randomized, phase 3, double-blind SYMPATICO study, researchers assigned 267 adults with relapsed/refractory MCL after 1-5 prior therapies 1:1 to receive oral ibrutinib 560 mg daily with oral venetoclax (standard 5-wk ramp-up to a target dose of 400 mg once daily) or placebo for 2 years. Then they continued with ibrutinib alone until progressive disease or unacceptable toxicity.

The study began in 2017. The median age of patients was 68, and the numbers of patients in each group were 134 (both drugs) and 133 (ibrutinib plus placebo).

At a median of 51.2 months, median PFS — the primary endpoint — was higher in the combination group vs. ibrutinib alone (31.9 vs. 22.1 months, hazard ratio [HR]=0.65, 95% CI, 0.47–0.88, P = .0052). While overall survival was higher in the combination group vs. ibrutinib alone, an interim analysis found that the difference was not statistically significant (44.9 months vs. 38.6 months, 95% CI, HR = 0.85, 0.62-1.19, P = .3465).

When questioned about this finding at the ASH news briefing, Dr. Wang said that 170 events are needed for a full overall survival analysis, and there are just 144 now. The study may reach that point in early 2025, he said.

Over a median treatment duration of 22.0 months for the combination treatment and 17.7 months for ibrutinib alone, grade ≥ 3 adverse events occurred in 84% and 76% of patients, respectively. At 60%, the level of serious adverse events was the same in both groups.

In an interview, Brian T. Hill, MD, PhD, of Cleveland Clinic, noted that in general, MCL “has a pretty relentless pattern of relapses and disease progression without an easy cure in the vast majority of patients.”

Ibrutinib has revolutionized treatment over the past decade with generally manageable side effects, and clinicians are now turning to other Bruton tyrosine kinase inhibitors, he said. Still, “there is a need for improving the durability and the response rates second-line treatment or beyond,” Dr. Hill said.

The new study is important since it’s the first randomized trial “that demonstrates that additional venetoclax significantly improves not only response rates, but also progression-free survival with a trend toward overall survival,” he said. “The toxicity profile doesn’t really seem to be significantly more worse than what we might expect with each agent given individually.”

However, Dr. Hill noted that “it’s a relatively small study and relatively short follow-up.”

It may be difficult to get an ibrutinib-venetoclax combination approved today since ibrutinib is no longer the preferred Bruton tyrosine kinase inhibitor for clinicians, he said.

Pharmacyclics, maker of ibrutinib, is the study sponsor and Janssen is a collaborator.

Dr. Wang reports research funding Acerta Pharma, AstraZeneca, BeiGene, BioInvent, Celgene, Genentech, Innocare, Janssen, Juno Therapeutics, Kite Pharma, Lilly, Loxo Oncology, Molecular Templates, Oncternal, Pharmacyclics, and VelosBio. Other authors report multiple and various relationships with industry. Dr. Hill discloses research funding and consulting relationships with Pharmacyclics, AbbVie, BeiGene, and AstraZeneca.

The Food and Drug Administration approved a new colony-stimulating factor, efbemalenograstim alfa (Ryzneuta, Evive Biotech), to decrease the incidence of infection, as manifested by febrile neutropenia, in adults with nonmyeloid malignancies receiving myelosuppressive anticancer drugs.

Efbemalenograstim joins other agents already on the U.S. market, including pegfilgrastim (Neulasta), that aim to reduce the incidence of chemotherapy-induced febrile neutropenia.

The approval of efbemalenograstim was based on two randomized trials. The first included 122 women with either metastatic or nonmetastatic breast cancer who were receiving doxorubicin and docetaxel. These patients were randomly assigned to receive either one subcutaneous injection of efbemalenograstim or placebo on the second day of their first chemotherapy cycle. All patients received efbemalenograstim on the second day of cycles two through four.

The mean duration of grade 4 neutropenia in the first cycle was 1.4 days with efbemalenograstim versus 4.3 days with placebo. Only 4.8% of patients who received efbemalenograstim experienced chemotherapy-induced febrile neutropenia, compared with 25.6% who received the placebo.

The new agent went up against pegfilgrastim in the second trial, which included 393 women who received docetaxel and cyclophosphamide as treatment for nonmetastatic breast cancer. These patients were randomly assigned to receive either a single subcutaneous injection of efbemalenograstim or pegfilgrastim on the second day of each cycle.

During the first cycle, patients in both arms of the trial experienced a mean of 0.2 days of grade 4 neutropenia.

The most common side effects associated with efbemalenograstim were nausea, anemia, and thrombocytopenia. Similar to pegfilgrastim’s label, efbemalenograstim’s label warns of possible splenic rupture, respiratory distress syndrome, sickle cell crisis, and other serious adverse events.

The FDA recommends a dose of 20 mg subcutaneous once per chemotherapy cycle.

A version of this article first appeared on Medscape.com.

The Food and Drug Administration approved a new colony-stimulating factor, efbemalenograstim alfa (Ryzneuta, Evive Biotech), to decrease the incidence of infection, as manifested by febrile neutropenia, in adults with nonmyeloid malignancies receiving myelosuppressive anticancer drugs.

Efbemalenograstim joins other agents already on the U.S. market, including pegfilgrastim (Neulasta), that aim to reduce the incidence of chemotherapy-induced febrile neutropenia.

The approval of efbemalenograstim was based on two randomized trials. The first included 122 women with either metastatic or nonmetastatic breast cancer who were receiving doxorubicin and docetaxel. These patients were randomly assigned to receive either one subcutaneous injection of efbemalenograstim or placebo on the second day of their first chemotherapy cycle. All patients received efbemalenograstim on the second day of cycles two through four.

The mean duration of grade 4 neutropenia in the first cycle was 1.4 days with efbemalenograstim versus 4.3 days with placebo. Only 4.8% of patients who received efbemalenograstim experienced chemotherapy-induced febrile neutropenia, compared with 25.6% who received the placebo.

The new agent went up against pegfilgrastim in the second trial, which included 393 women who received docetaxel and cyclophosphamide as treatment for nonmetastatic breast cancer. These patients were randomly assigned to receive either a single subcutaneous injection of efbemalenograstim or pegfilgrastim on the second day of each cycle.

During the first cycle, patients in both arms of the trial experienced a mean of 0.2 days of grade 4 neutropenia.

The most common side effects associated with efbemalenograstim were nausea, anemia, and thrombocytopenia. Similar to pegfilgrastim’s label, efbemalenograstim’s label warns of possible splenic rupture, respiratory distress syndrome, sickle cell crisis, and other serious adverse events.

The FDA recommends a dose of 20 mg subcutaneous once per chemotherapy cycle.

A version of this article first appeared on Medscape.com.

The Food and Drug Administration approved a new colony-stimulating factor, efbemalenograstim alfa (Ryzneuta, Evive Biotech), to decrease the incidence of infection, as manifested by febrile neutropenia, in adults with nonmyeloid malignancies receiving myelosuppressive anticancer drugs.

Efbemalenograstim joins other agents already on the U.S. market, including pegfilgrastim (Neulasta), that aim to reduce the incidence of chemotherapy-induced febrile neutropenia.

The approval of efbemalenograstim was based on two randomized trials. The first included 122 women with either metastatic or nonmetastatic breast cancer who were receiving doxorubicin and docetaxel. These patients were randomly assigned to receive either one subcutaneous injection of efbemalenograstim or placebo on the second day of their first chemotherapy cycle. All patients received efbemalenograstim on the second day of cycles two through four.

The mean duration of grade 4 neutropenia in the first cycle was 1.4 days with efbemalenograstim versus 4.3 days with placebo. Only 4.8% of patients who received efbemalenograstim experienced chemotherapy-induced febrile neutropenia, compared with 25.6% who received the placebo.

The new agent went up against pegfilgrastim in the second trial, which included 393 women who received docetaxel and cyclophosphamide as treatment for nonmetastatic breast cancer. These patients were randomly assigned to receive either a single subcutaneous injection of efbemalenograstim or pegfilgrastim on the second day of each cycle.

During the first cycle, patients in both arms of the trial experienced a mean of 0.2 days of grade 4 neutropenia.

The most common side effects associated with efbemalenograstim were nausea, anemia, and thrombocytopenia. Similar to pegfilgrastim’s label, efbemalenograstim’s label warns of possible splenic rupture, respiratory distress syndrome, sickle cell crisis, and other serious adverse events.

The FDA recommends a dose of 20 mg subcutaneous once per chemotherapy cycle.

A version of this article first appeared on Medscape.com.

U.S. government advisers expressed discomfort with Acrotech Biopharma’s 2030 target completion date for a study meant to prove the clinical benefits of two lymphoma drugs that the company has been selling for years.

At a Nov. 16 meeting, the Oncologic Drugs Advisory Committee of the Food and Drug Administration reviewed the reasons for delays in confirmatory trials for pralatrexate (Folotyn) and belinostat (Beleodaq), both now owned by East Windsor, N.J.–based Acrotech. The FDA granted accelerated approval for pralatrexate in 2009 and belinostat in 2014.

“The consensus of the advisory committee is that we have significant concerns about the very prolonged delay and getting these confirmatory studies underway,” said Andy Chen, MD, PhD, of Oregon Health & Science University, Portland, who served as acting ODAC chair for the meeting.

Corporate ownership changes were among the reasons Acrotech cited for the long delays in producing the confirmatory research on pralatrexate and belinostat. Allos Therapeutics won the FDA approval of pralatrexate in 2009. In 2012, Spectrum Pharmaceuticals acquired Acrotech. Spectrum won approval of belinostat in 2014. Acrotech acquired Spectrum in 2019.

The FDA didn’t ask ODAC to take votes on any questions at the meeting. Instead, the FDA sought its expert feedback about how to address the prolonged delays with pralatrexate and belinostat research and, in general, how to promote more timely completion of confirmatory trials for drugs cleared by accelerated approval.

Pralatrexate and belinostat are both used to treat relapsed or refractory peripheral T-cell lymphoma, a rare and aggressive disease affecting about 10,000-15,000 people annually in the United States.

Through the accelerated approval process, the FDA seeks to speed medicines to people with fatal and serious conditions based on promising signs in clinical testing.

The initial pralatrexate and belinostat were based on phase 2, single-arm, monotherapy studies, with about 109 evaluable patients in the key pralatrexate study and 120 evaluable patients in the belinostat study. As is common, these phase 2 tests used measurements of cancer progression, known as the overall response rate.

The FDA then expects companies to show through more extensive testing that medicines cleared with accelerated approvals can deliver significant benefits, such as extending lives. When there are delays in confirmatory trials, patients can be exposed to medicines, often with significant side effects, that are unlikely to benefit them.

For example, the FDA granted an accelerated approval in 2011 for romidepsin for this use for peripheral T-cell lymphoma, the same condition for which pralatrexate and belinostat are used. But in 2021, Bristol-Myers Squibb withdrew the approval for that use of romidepsin when a confirmatory trial failed to meet the primary efficacy endpoint of progression free survival.

At the meeting, Richard Pazdur, MD, who leads oncology medicine at the FDA, urged Acrotech to shorten the time needed to determine whether its medicines deliver significant benefits to patients and thus merit full approval, or whether they too may fall short.

“We’re really in a situation where patients are caught in the middle here,” Dr. Pazdur said. “I feel very bad for that situation and very bad for the patients that they don’t have this information.”
 

‘Dangerous precedent’

The FDA in recent years has stepped up its efforts to get companies to complete their required studies on drugs cleared by accelerated approvals. The FDA has granted a total of 187 accelerated approvals for cancer drugs. Many of these cover new uses of established drugs and others serve to allow the introduction of new medicines.

For more than half of these cases, 96 of 187, the FDA already has learned that it made the right call in allowing early access to medicines. Companies have presented study results that confirmed the benefit of drugs and thus been able to convert accelerated approvals to traditional approvals.

But 27 of the 187 oncology accelerated approvals have been withdrawn. In these cases, subsequent research failed to establish the expected benefits of these cancer drugs.

And in 95 cases, the FDA and companies are still waiting for the results of studies to confirm the expected benefit of drugs granted accelerated approvals. The FDA classifies these as ongoing accelerated approvals. About 85% of these ongoing approvals were granted in the past 5 years, in contrast to 14 years for pralatrexate and 9 for belinostat.

“It sets a dangerous precedent for the other sponsors and drug companies to have such outliers from the same company,” said ODAC member Toni K. Choueiri, MD, of Harvard Medical School and the Dana-Farber Cancer Institute, both in Boston.

The current agreement between the FDA and Acrotech focuses on a phase 3 trial, SPI-BEL-301 as the confirmatory study. Acrotech’s plan is to start with dose optimization studies in part 1 of the trial, with part 2 meant to see if its medicines provide a significant benefit as measured by progression-free survival.

The plan is to compare treatments. One group of patients would get belinostat plus a common cancer regimen known as CHOP, another group would get pralatrexate plus the COP cancer regimen, which is CHOP without doxorubicin, and a third group would get CHOP.

Acrotech’s current time line is for part 1, which began in October, to finish by December 2025. Then the part 2 timeline would run from 2026 to 2030, with interim progression-free survival possible by 2028.

ODAC member Ashley Rosko, MD, a hematologist from Ohio State University, Columbus, asked Acrotech what steps it will take to try to speed recruitment for the study.

“We are going to implement many strategies,” including what’s called digital amplification, replied Ashish Anvekar, president of Acrotech. This will help identify patients and channel them toward participating clinical sites.

Alexander A. Vinks, PhD, PharmD, who served as a temporary member of ODAC for the Nov. 16 meeting, said many clinicians will not be excited about enrolling patients in this kind of large, traditionally designed study.

Dr. Vinks, who is professor emeritus at Cincinnati Children’s Hospital Medical Center and University of Cincinnati, now works with consultant group NDA, a firm that advises companies on developing drugs.

Dr. Vinks advised Acrotech should try “to pin down what is most likely a smaller study that could be simpler, but still give robust, informative data.”

U.S. government advisers expressed discomfort with Acrotech Biopharma’s 2030 target completion date for a study meant to prove the clinical benefits of two lymphoma drugs that the company has been selling for years.

At a Nov. 16 meeting, the Oncologic Drugs Advisory Committee of the Food and Drug Administration reviewed the reasons for delays in confirmatory trials for pralatrexate (Folotyn) and belinostat (Beleodaq), both now owned by East Windsor, N.J.–based Acrotech. The FDA granted accelerated approval for pralatrexate in 2009 and belinostat in 2014.

“The consensus of the advisory committee is that we have significant concerns about the very prolonged delay and getting these confirmatory studies underway,” said Andy Chen, MD, PhD, of Oregon Health & Science University, Portland, who served as acting ODAC chair for the meeting.

Corporate ownership changes were among the reasons Acrotech cited for the long delays in producing the confirmatory research on pralatrexate and belinostat. Allos Therapeutics won the FDA approval of pralatrexate in 2009. In 2012, Spectrum Pharmaceuticals acquired Acrotech. Spectrum won approval of belinostat in 2014. Acrotech acquired Spectrum in 2019.

The FDA didn’t ask ODAC to take votes on any questions at the meeting. Instead, the FDA sought its expert feedback about how to address the prolonged delays with pralatrexate and belinostat research and, in general, how to promote more timely completion of confirmatory trials for drugs cleared by accelerated approval.

Pralatrexate and belinostat are both used to treat relapsed or refractory peripheral T-cell lymphoma, a rare and aggressive disease affecting about 10,000-15,000 people annually in the United States.

Through the accelerated approval process, the FDA seeks to speed medicines to people with fatal and serious conditions based on promising signs in clinical testing.

The initial pralatrexate and belinostat were based on phase 2, single-arm, monotherapy studies, with about 109 evaluable patients in the key pralatrexate study and 120 evaluable patients in the belinostat study. As is common, these phase 2 tests used measurements of cancer progression, known as the overall response rate.

The FDA then expects companies to show through more extensive testing that medicines cleared with accelerated approvals can deliver significant benefits, such as extending lives. When there are delays in confirmatory trials, patients can be exposed to medicines, often with significant side effects, that are unlikely to benefit them.

For example, the FDA granted an accelerated approval in 2011 for romidepsin for this use for peripheral T-cell lymphoma, the same condition for which pralatrexate and belinostat are used. But in 2021, Bristol-Myers Squibb withdrew the approval for that use of romidepsin when a confirmatory trial failed to meet the primary efficacy endpoint of progression free survival.

At the meeting, Richard Pazdur, MD, who leads oncology medicine at the FDA, urged Acrotech to shorten the time needed to determine whether its medicines deliver significant benefits to patients and thus merit full approval, or whether they too may fall short.

“We’re really in a situation where patients are caught in the middle here,” Dr. Pazdur said. “I feel very bad for that situation and very bad for the patients that they don’t have this information.”
 

‘Dangerous precedent’

The FDA in recent years has stepped up its efforts to get companies to complete their required studies on drugs cleared by accelerated approvals. The FDA has granted a total of 187 accelerated approvals for cancer drugs. Many of these cover new uses of established drugs and others serve to allow the introduction of new medicines.

For more than half of these cases, 96 of 187, the FDA already has learned that it made the right call in allowing early access to medicines. Companies have presented study results that confirmed the benefit of drugs and thus been able to convert accelerated approvals to traditional approvals.

But 27 of the 187 oncology accelerated approvals have been withdrawn. In these cases, subsequent research failed to establish the expected benefits of these cancer drugs.

And in 95 cases, the FDA and companies are still waiting for the results of studies to confirm the expected benefit of drugs granted accelerated approvals. The FDA classifies these as ongoing accelerated approvals. About 85% of these ongoing approvals were granted in the past 5 years, in contrast to 14 years for pralatrexate and 9 for belinostat.

“It sets a dangerous precedent for the other sponsors and drug companies to have such outliers from the same company,” said ODAC member Toni K. Choueiri, MD, of Harvard Medical School and the Dana-Farber Cancer Institute, both in Boston.

The current agreement between the FDA and Acrotech focuses on a phase 3 trial, SPI-BEL-301 as the confirmatory study. Acrotech’s plan is to start with dose optimization studies in part 1 of the trial, with part 2 meant to see if its medicines provide a significant benefit as measured by progression-free survival.

The plan is to compare treatments. One group of patients would get belinostat plus a common cancer regimen known as CHOP, another group would get pralatrexate plus the COP cancer regimen, which is CHOP without doxorubicin, and a third group would get CHOP.

Acrotech’s current time line is for part 1, which began in October, to finish by December 2025. Then the part 2 timeline would run from 2026 to 2030, with interim progression-free survival possible by 2028.

ODAC member Ashley Rosko, MD, a hematologist from Ohio State University, Columbus, asked Acrotech what steps it will take to try to speed recruitment for the study.

“We are going to implement many strategies,” including what’s called digital amplification, replied Ashish Anvekar, president of Acrotech. This will help identify patients and channel them toward participating clinical sites.

Alexander A. Vinks, PhD, PharmD, who served as a temporary member of ODAC for the Nov. 16 meeting, said many clinicians will not be excited about enrolling patients in this kind of large, traditionally designed study.

Dr. Vinks, who is professor emeritus at Cincinnati Children’s Hospital Medical Center and University of Cincinnati, now works with consultant group NDA, a firm that advises companies on developing drugs.

Dr. Vinks advised Acrotech should try “to pin down what is most likely a smaller study that could be simpler, but still give robust, informative data.”

U.S. government advisers expressed discomfort with Acrotech Biopharma’s 2030 target completion date for a study meant to prove the clinical benefits of two lymphoma drugs that the company has been selling for years.

At a Nov. 16 meeting, the Oncologic Drugs Advisory Committee of the Food and Drug Administration reviewed the reasons for delays in confirmatory trials for pralatrexate (Folotyn) and belinostat (Beleodaq), both now owned by East Windsor, N.J.–based Acrotech. The FDA granted accelerated approval for pralatrexate in 2009 and belinostat in 2014.

“The consensus of the advisory committee is that we have significant concerns about the very prolonged delay and getting these confirmatory studies underway,” said Andy Chen, MD, PhD, of Oregon Health & Science University, Portland, who served as acting ODAC chair for the meeting.

Corporate ownership changes were among the reasons Acrotech cited for the long delays in producing the confirmatory research on pralatrexate and belinostat. Allos Therapeutics won the FDA approval of pralatrexate in 2009. In 2012, Spectrum Pharmaceuticals acquired Acrotech. Spectrum won approval of belinostat in 2014. Acrotech acquired Spectrum in 2019.

The FDA didn’t ask ODAC to take votes on any questions at the meeting. Instead, the FDA sought its expert feedback about how to address the prolonged delays with pralatrexate and belinostat research and, in general, how to promote more timely completion of confirmatory trials for drugs cleared by accelerated approval.

Pralatrexate and belinostat are both used to treat relapsed or refractory peripheral T-cell lymphoma, a rare and aggressive disease affecting about 10,000-15,000 people annually in the United States.

Through the accelerated approval process, the FDA seeks to speed medicines to people with fatal and serious conditions based on promising signs in clinical testing.

The initial pralatrexate and belinostat were based on phase 2, single-arm, monotherapy studies, with about 109 evaluable patients in the key pralatrexate study and 120 evaluable patients in the belinostat study. As is common, these phase 2 tests used measurements of cancer progression, known as the overall response rate.

The FDA then expects companies to show through more extensive testing that medicines cleared with accelerated approvals can deliver significant benefits, such as extending lives. When there are delays in confirmatory trials, patients can be exposed to medicines, often with significant side effects, that are unlikely to benefit them.

For example, the FDA granted an accelerated approval in 2011 for romidepsin for this use for peripheral T-cell lymphoma, the same condition for which pralatrexate and belinostat are used. But in 2021, Bristol-Myers Squibb withdrew the approval for that use of romidepsin when a confirmatory trial failed to meet the primary efficacy endpoint of progression free survival.

At the meeting, Richard Pazdur, MD, who leads oncology medicine at the FDA, urged Acrotech to shorten the time needed to determine whether its medicines deliver significant benefits to patients and thus merit full approval, or whether they too may fall short.

“We’re really in a situation where patients are caught in the middle here,” Dr. Pazdur said. “I feel very bad for that situation and very bad for the patients that they don’t have this information.”
 

‘Dangerous precedent’

The FDA in recent years has stepped up its efforts to get companies to complete their required studies on drugs cleared by accelerated approvals. The FDA has granted a total of 187 accelerated approvals for cancer drugs. Many of these cover new uses of established drugs and others serve to allow the introduction of new medicines.

For more than half of these cases, 96 of 187, the FDA already has learned that it made the right call in allowing early access to medicines. Companies have presented study results that confirmed the benefit of drugs and thus been able to convert accelerated approvals to traditional approvals.

But 27 of the 187 oncology accelerated approvals have been withdrawn. In these cases, subsequent research failed to establish the expected benefits of these cancer drugs.

And in 95 cases, the FDA and companies are still waiting for the results of studies to confirm the expected benefit of drugs granted accelerated approvals. The FDA classifies these as ongoing accelerated approvals. About 85% of these ongoing approvals were granted in the past 5 years, in contrast to 14 years for pralatrexate and 9 for belinostat.

“It sets a dangerous precedent for the other sponsors and drug companies to have such outliers from the same company,” said ODAC member Toni K. Choueiri, MD, of Harvard Medical School and the Dana-Farber Cancer Institute, both in Boston.

The current agreement between the FDA and Acrotech focuses on a phase 3 trial, SPI-BEL-301 as the confirmatory study. Acrotech’s plan is to start with dose optimization studies in part 1 of the trial, with part 2 meant to see if its medicines provide a significant benefit as measured by progression-free survival.

The plan is to compare treatments. One group of patients would get belinostat plus a common cancer regimen known as CHOP, another group would get pralatrexate plus the COP cancer regimen, which is CHOP without doxorubicin, and a third group would get CHOP.

Acrotech’s current time line is for part 1, which began in October, to finish by December 2025. Then the part 2 timeline would run from 2026 to 2030, with interim progression-free survival possible by 2028.

ODAC member Ashley Rosko, MD, a hematologist from Ohio State University, Columbus, asked Acrotech what steps it will take to try to speed recruitment for the study.

“We are going to implement many strategies,” including what’s called digital amplification, replied Ashish Anvekar, president of Acrotech. This will help identify patients and channel them toward participating clinical sites.

Alexander A. Vinks, PhD, PharmD, who served as a temporary member of ODAC for the Nov. 16 meeting, said many clinicians will not be excited about enrolling patients in this kind of large, traditionally designed study.

Dr. Vinks, who is professor emeritus at Cincinnati Children’s Hospital Medical Center and University of Cincinnati, now works with consultant group NDA, a firm that advises companies on developing drugs.

Dr. Vinks advised Acrotech should try “to pin down what is most likely a smaller study that could be simpler, but still give robust, informative data.”

SAN DIEGO – The Food and Drug Administration has launched Project Optimus to dramatically overhaul how oncology therapies are developed in clinical trials, with investigational blood cancer drugs taking center stage in this effort.

The goal is “to better identify and characterize optimized doses” in early stages of research and move away from the default of the traditional maximum tolerated dose strategy, hematologist-oncologist Marc R. Theoret, MD, deputy director of the FDA’s Oncology Center of Excellence, said in a presentation at the 2023 Society for Immunotherapy of Cancer annual meeting.

Earlier this year, the FDA released a draft guidance regarding the changes it hopes to see. The agency supported randomized, parallel dose-response trials when feasible, and “strong rationale for choice of dosage should be provided before initiating a registration trial(s) to support a subsequent indication and usage.”

The goal of controlling toxicity is “very highly important” in hematology research since blood cancer drugs can cause significant adverse effects in areas such as the lungs and heart, said Cecilia Yeung, MD, who led the SITC session about Project Optimus. Dr. Yeung is a clinical pathologist who works on investigational trials at Fred Hutchinson Cancer Research Center in Seattle.

In an interview, Dr. Yeung, who has a subspecialty in hematopathology, explained why the foundations of cancer research are changing and what hematologist-oncologists can expect to see on the horizon.
 

Q: Project Optimus aims to move beyond the traditional dose-escalation approach to the development of cancer drugs. How does that strategy work?

Dr. Yeung: Prior to Project Optimus, they’d use a 3+3 strategy in phase 1 trials: They’d give a dose to three fairly healthy patients, then they’d go up by escalating doses in more patients. They’d keep going up until two-thirds of patients at a specific dose suffered from bad side effects, then they’d back off to the last dose.

Q: This approach, which aims to identify the “maximum tolerated dose,” seemed to work well over decades of research into chemotherapy drugs. But worries arose as targeted therapies appeared in oncology areas such as blood cancer. Why did things change?

Dr. Yeung: With 3+3, you could tell pretty quickly how toxic chemotherapy was. But in targeted therapy, we were finding that these studies are not representative of actual toxicity. You’re not treating these patients for a very long time in phase 1, while patients on targeted therapy may be on these drugs for years. Concerns actually started with the first targeted drugs to treat leukemias and lymphomas. They were shown to have unexpected toxicity. A 2016 study found that drug developers had to reduce the original phase 1 dose in 45% of phase 3 trials [of small molecule and monoclonal antibody targeted agents] approved by the FDA over 12 years because of toxicity.

Q: What is FDA’s goal for Project Optimus?

Dr. Yeung: They want to have a second piece, to balance that maximum tolerated dose with a safe and tolerable dose for most people.

Q: What kind of resistance is the FDA getting from drug companies?

Dr. Yeung: The FDA makes a good argument that the system wasn’t working. But drug companies say this will drive up the cost of clinical trials and won’t allow them to treat patients with the maximal doses they could give them. I see arguments from both sides. There has to be a balance between the two.

Q: How will all this affect drug development?

Dr. Yeung: Drugs may become more expensive because much more testing will happen during clinical trials.

Q: Could this reduce the number of investigational drugs?

Dr. Yeung: Hopefully not, but this is huge endeavor for smaller companies that are strapped for funding.

Q: What do you think the future holds?

Dr. Yeung: Ultimately, this is a good thing because if everything works out, we’ll have fewer toxic side effects. But we’re going to have to go through a period of growing pains.

SAN DIEGO – The Food and Drug Administration has launched Project Optimus to dramatically overhaul how oncology therapies are developed in clinical trials, with investigational blood cancer drugs taking center stage in this effort.

The goal is “to better identify and characterize optimized doses” in early stages of research and move away from the default of the traditional maximum tolerated dose strategy, hematologist-oncologist Marc R. Theoret, MD, deputy director of the FDA’s Oncology Center of Excellence, said in a presentation at the 2023 Society for Immunotherapy of Cancer annual meeting.

Earlier this year, the FDA released a draft guidance regarding the changes it hopes to see. The agency supported randomized, parallel dose-response trials when feasible, and “strong rationale for choice of dosage should be provided before initiating a registration trial(s) to support a subsequent indication and usage.”

The goal of controlling toxicity is “very highly important” in hematology research since blood cancer drugs can cause significant adverse effects in areas such as the lungs and heart, said Cecilia Yeung, MD, who led the SITC session about Project Optimus. Dr. Yeung is a clinical pathologist who works on investigational trials at Fred Hutchinson Cancer Research Center in Seattle.

In an interview, Dr. Yeung, who has a subspecialty in hematopathology, explained why the foundations of cancer research are changing and what hematologist-oncologists can expect to see on the horizon.
 

Q: Project Optimus aims to move beyond the traditional dose-escalation approach to the development of cancer drugs. How does that strategy work?

Dr. Yeung: Prior to Project Optimus, they’d use a 3+3 strategy in phase 1 trials: They’d give a dose to three fairly healthy patients, then they’d go up by escalating doses in more patients. They’d keep going up until two-thirds of patients at a specific dose suffered from bad side effects, then they’d back off to the last dose.

Q: This approach, which aims to identify the “maximum tolerated dose,” seemed to work well over decades of research into chemotherapy drugs. But worries arose as targeted therapies appeared in oncology areas such as blood cancer. Why did things change?

Dr. Yeung: With 3+3, you could tell pretty quickly how toxic chemotherapy was. But in targeted therapy, we were finding that these studies are not representative of actual toxicity. You’re not treating these patients for a very long time in phase 1, while patients on targeted therapy may be on these drugs for years. Concerns actually started with the first targeted drugs to treat leukemias and lymphomas. They were shown to have unexpected toxicity. A 2016 study found that drug developers had to reduce the original phase 1 dose in 45% of phase 3 trials [of small molecule and monoclonal antibody targeted agents] approved by the FDA over 12 years because of toxicity.

Q: What is FDA’s goal for Project Optimus?

Dr. Yeung: They want to have a second piece, to balance that maximum tolerated dose with a safe and tolerable dose for most people.

Q: What kind of resistance is the FDA getting from drug companies?

Dr. Yeung: The FDA makes a good argument that the system wasn’t working. But drug companies say this will drive up the cost of clinical trials and won’t allow them to treat patients with the maximal doses they could give them. I see arguments from both sides. There has to be a balance between the two.

Q: How will all this affect drug development?

Dr. Yeung: Drugs may become more expensive because much more testing will happen during clinical trials.

Q: Could this reduce the number of investigational drugs?

Dr. Yeung: Hopefully not, but this is huge endeavor for smaller companies that are strapped for funding.

Q: What do you think the future holds?

Dr. Yeung: Ultimately, this is a good thing because if everything works out, we’ll have fewer toxic side effects. But we’re going to have to go through a period of growing pains.

SAN DIEGO – The Food and Drug Administration has launched Project Optimus to dramatically overhaul how oncology therapies are developed in clinical trials, with investigational blood cancer drugs taking center stage in this effort.

The goal is “to better identify and characterize optimized doses” in early stages of research and move away from the default of the traditional maximum tolerated dose strategy, hematologist-oncologist Marc R. Theoret, MD, deputy director of the FDA’s Oncology Center of Excellence, said in a presentation at the 2023 Society for Immunotherapy of Cancer annual meeting.

Earlier this year, the FDA released a draft guidance regarding the changes it hopes to see. The agency supported randomized, parallel dose-response trials when feasible, and “strong rationale for choice of dosage should be provided before initiating a registration trial(s) to support a subsequent indication and usage.”

The goal of controlling toxicity is “very highly important” in hematology research since blood cancer drugs can cause significant adverse effects in areas such as the lungs and heart, said Cecilia Yeung, MD, who led the SITC session about Project Optimus. Dr. Yeung is a clinical pathologist who works on investigational trials at Fred Hutchinson Cancer Research Center in Seattle.

In an interview, Dr. Yeung, who has a subspecialty in hematopathology, explained why the foundations of cancer research are changing and what hematologist-oncologists can expect to see on the horizon.
 

Q: Project Optimus aims to move beyond the traditional dose-escalation approach to the development of cancer drugs. How does that strategy work?

Dr. Yeung: Prior to Project Optimus, they’d use a 3+3 strategy in phase 1 trials: They’d give a dose to three fairly healthy patients, then they’d go up by escalating doses in more patients. They’d keep going up until two-thirds of patients at a specific dose suffered from bad side effects, then they’d back off to the last dose.

Q: This approach, which aims to identify the “maximum tolerated dose,” seemed to work well over decades of research into chemotherapy drugs. But worries arose as targeted therapies appeared in oncology areas such as blood cancer. Why did things change?

Dr. Yeung: With 3+3, you could tell pretty quickly how toxic chemotherapy was. But in targeted therapy, we were finding that these studies are not representative of actual toxicity. You’re not treating these patients for a very long time in phase 1, while patients on targeted therapy may be on these drugs for years. Concerns actually started with the first targeted drugs to treat leukemias and lymphomas. They were shown to have unexpected toxicity. A 2016 study found that drug developers had to reduce the original phase 1 dose in 45% of phase 3 trials [of small molecule and monoclonal antibody targeted agents] approved by the FDA over 12 years because of toxicity.

Q: What is FDA’s goal for Project Optimus?

Dr. Yeung: They want to have a second piece, to balance that maximum tolerated dose with a safe and tolerable dose for most people.

Q: What kind of resistance is the FDA getting from drug companies?

Dr. Yeung: The FDA makes a good argument that the system wasn’t working. But drug companies say this will drive up the cost of clinical trials and won’t allow them to treat patients with the maximal doses they could give them. I see arguments from both sides. There has to be a balance between the two.

Q: How will all this affect drug development?

Dr. Yeung: Drugs may become more expensive because much more testing will happen during clinical trials.

Q: Could this reduce the number of investigational drugs?

Dr. Yeung: Hopefully not, but this is huge endeavor for smaller companies that are strapped for funding.

Q: What do you think the future holds?

Dr. Yeung: Ultimately, this is a good thing because if everything works out, we’ll have fewer toxic side effects. But we’re going to have to go through a period of growing pains.

SAN DIEGO – Radiation has become a crucial component of treatment for diffuse large B cell lymphoma (DLBCL) over the past 25 years. But radiologists presenting at an annual conference cautioned colleagues to keep the limitations of radiology in mind and not to assume that it’s always a necessary adjunct to chemotherapy.

For example, radiation may not be needed for advanced-stage patients who’ve received at least four cycles of R-CHOP chemotherapy (cyclophosphamide, doxorubicin, vincristine, and prednisolone plus rituximab), and whose PET scans show no sign of disease at interim or end-of treatment phases, said Joanna Yang, MD, MPH, of Washington University in St. Louis, in a presentation at the annual meeting of the American Society for Radiation Oncology.

These patients “may be able to omit radiotherapy without sacrificing good outcomes,” Dr. Yang said. In contrast, those whose PET scans show signs of disease at interim and end-of-treatment points may benefit from radiotherapy to selected sites, she said.

Dr. Yang highlighted a 2021 study in Blood that tracked 723 patients with advanced-stage DLBCL who were diagnosed from 2005 to 2017. All were treated with R-CHOP, and some of those who were PET-positive – that is, showing signs of malignant disease – were treated with radiotherapy.

Over a mean follow-up of 4.3 years, the study reported “time to progression and overall survival at 3 years were 83% vs. 56% and 87% vs. 64% in patients with PET-NEG and PET-POS scans, respectively.”

These findings aren’t surprising, Dr. Yang said. But “the PET-positive patients who got radiation actually had outcomes that came close to the outcomes that the PET-negative patients were able to achieve.” Their 3-year overall survival was 80% vs. 87% in the PET-negative, no-radiation group vs. 44% in the PET-positive, no-radiation group.

Dr. Yang cautioned, however, that withholding radiation in PET-negative patients isn’t right for everyone: “This doesn’t mean this should be the approach for every single patient.”

What about early-stage DLBCL? In patients without risk factors, Dr. Yang recommends PET scans after four treatments with R-CHOP. “Getting that end-of-treatment PET is going to be super-critical because that’s going to help guide you in terms of the patients who you may feel comfortable omitting radiation versus the patients who remain PET-positive at the end of chemotherapy. Many places will also add an interim PET as well.”

According to her, radiotherapy is appropriate in patients who are PET-positive, based on the findings of the FLYER and LYSA-GOELAMS 02-03 trials.

In early-stage patients who have risk factors such as advanced age or bulky or extra-nodal disease, Dr. Yang suggests examining interim PET scans after three treatments with R-CHOP. If they are negative, another R-CHOP treatment is appropriate – with or without radiotherapy.

“There’s a lot that goes into that decision. The first thing I think about in patients who have risk factors is: What salvage options are available for my patient? Can they tolerate these salvage option? If they’re older, they might not be eligible for auto [autologous hematopoietic cell transplantation]. If they’re frail, they might not be eligible for auto or CAR T cells. If they have bulk, it’s certainly an area of concern. It seems like radiation does help control disease in areas of bulk for patients with DLBCL.”

If these patients are PET-positive, go directly to radiotherapy, Dr. Yang advised. Trials that support this approach include S1001, LYSA-GOELAMS 02-03, and RICOVER-noRTH, she said.

What about double-hit and triple-hit lymphomas, which are especially aggressive due to genetic variations? Research suggests that “even if double hit/triple hit is not responding to chemo, it still responds to radiation,” Dr. Yang said.

In regard to advanced-stage disease, “if patients are receiving full-dose chemo for least six cycles, I use that end-of-treatment PET to help guide me. And then I make an individualized decision based on how bulky that disease is, where the location is, how morbid a relapse would be. If they’re older or receiving reduced-dose chemotherapy, then I’ll more seriously consider radiation just because there are limited options for these patients. And we know that DLCBL is most commonly a disease of the elderly.”

In an adjoining presentation at ASTRO, Andrea Ng, MD, MPH, of Harvard Medical School/Dana-Farber Brigham Cancer Center, Boston, discussed which patients with incomplete response or refractory/relapsed DLCBL can benefit from radiotherapy.

She highlighted patients with good partial response and end-of-treatment PET-positive with evidence of residual 18F-fluorodeoxyglucose activity via PET scan (Deauville 4/5) – a group that “we’re increasingly seeing.” In these patients, “radiation can be quite effective” at doses of 36-45 Gy. She highlighted a study from 2011 that linked consolidation radiotherapy to 5-year event-free survival in 65% of patients.

As for relapsed/refractory disease in patients who aren’t candidates for further systemic therapy – the “frail without good options” – Dr. Ng said data about salvage radiotherapy is limited. However, a 2015 study tracked 65 patients who were treated with a median dose of 40 Gy with “curative” intent. Local control was “not great” at 72% at 2 years, Dr. Ng said, while overall survival was 60% and progress-free survival was 46%.

Dr. Ng, who was one of this study’s authors, said several groups did better: Those with refractory vs. relapsed disease and those who were responsive to chemotherapy vs. those who were not.

She also highlighted a similar 2019 study of 32 patients with refractory/relapsed disease treated with salvage radiotherapy (median dose of 42.7 Gy) found that 61.8% reached progress-free survival at 5 years – a better outcome.

Dr. Yang has no disclosures. Dr. Ng discloses royalties from UpToDate and Elsevier.
 

SAN DIEGO – Radiation has become a crucial component of treatment for diffuse large B cell lymphoma (DLBCL) over the past 25 years. But radiologists presenting at an annual conference cautioned colleagues to keep the limitations of radiology in mind and not to assume that it’s always a necessary adjunct to chemotherapy.

For example, radiation may not be needed for advanced-stage patients who’ve received at least four cycles of R-CHOP chemotherapy (cyclophosphamide, doxorubicin, vincristine, and prednisolone plus rituximab), and whose PET scans show no sign of disease at interim or end-of treatment phases, said Joanna Yang, MD, MPH, of Washington University in St. Louis, in a presentation at the annual meeting of the American Society for Radiation Oncology.

These patients “may be able to omit radiotherapy without sacrificing good outcomes,” Dr. Yang said. In contrast, those whose PET scans show signs of disease at interim and end-of-treatment points may benefit from radiotherapy to selected sites, she said.

Dr. Yang highlighted a 2021 study in Blood that tracked 723 patients with advanced-stage DLBCL who were diagnosed from 2005 to 2017. All were treated with R-CHOP, and some of those who were PET-positive – that is, showing signs of malignant disease – were treated with radiotherapy.

Over a mean follow-up of 4.3 years, the study reported “time to progression and overall survival at 3 years were 83% vs. 56% and 87% vs. 64% in patients with PET-NEG and PET-POS scans, respectively.”

These findings aren’t surprising, Dr. Yang said. But “the PET-positive patients who got radiation actually had outcomes that came close to the outcomes that the PET-negative patients were able to achieve.” Their 3-year overall survival was 80% vs. 87% in the PET-negative, no-radiation group vs. 44% in the PET-positive, no-radiation group.

Dr. Yang cautioned, however, that withholding radiation in PET-negative patients isn’t right for everyone: “This doesn’t mean this should be the approach for every single patient.”

What about early-stage DLBCL? In patients without risk factors, Dr. Yang recommends PET scans after four treatments with R-CHOP. “Getting that end-of-treatment PET is going to be super-critical because that’s going to help guide you in terms of the patients who you may feel comfortable omitting radiation versus the patients who remain PET-positive at the end of chemotherapy. Many places will also add an interim PET as well.”

According to her, radiotherapy is appropriate in patients who are PET-positive, based on the findings of the FLYER and LYSA-GOELAMS 02-03 trials.

In early-stage patients who have risk factors such as advanced age or bulky or extra-nodal disease, Dr. Yang suggests examining interim PET scans after three treatments with R-CHOP. If they are negative, another R-CHOP treatment is appropriate – with or without radiotherapy.

“There’s a lot that goes into that decision. The first thing I think about in patients who have risk factors is: What salvage options are available for my patient? Can they tolerate these salvage option? If they’re older, they might not be eligible for auto [autologous hematopoietic cell transplantation]. If they’re frail, they might not be eligible for auto or CAR T cells. If they have bulk, it’s certainly an area of concern. It seems like radiation does help control disease in areas of bulk for patients with DLBCL.”

If these patients are PET-positive, go directly to radiotherapy, Dr. Yang advised. Trials that support this approach include S1001, LYSA-GOELAMS 02-03, and RICOVER-noRTH, she said.

What about double-hit and triple-hit lymphomas, which are especially aggressive due to genetic variations? Research suggests that “even if double hit/triple hit is not responding to chemo, it still responds to radiation,” Dr. Yang said.

In regard to advanced-stage disease, “if patients are receiving full-dose chemo for least six cycles, I use that end-of-treatment PET to help guide me. And then I make an individualized decision based on how bulky that disease is, where the location is, how morbid a relapse would be. If they’re older or receiving reduced-dose chemotherapy, then I’ll more seriously consider radiation just because there are limited options for these patients. And we know that DLCBL is most commonly a disease of the elderly.”

In an adjoining presentation at ASTRO, Andrea Ng, MD, MPH, of Harvard Medical School/Dana-Farber Brigham Cancer Center, Boston, discussed which patients with incomplete response or refractory/relapsed DLCBL can benefit from radiotherapy.

She highlighted patients with good partial response and end-of-treatment PET-positive with evidence of residual 18F-fluorodeoxyglucose activity via PET scan (Deauville 4/5) – a group that “we’re increasingly seeing.” In these patients, “radiation can be quite effective” at doses of 36-45 Gy. She highlighted a study from 2011 that linked consolidation radiotherapy to 5-year event-free survival in 65% of patients.

As for relapsed/refractory disease in patients who aren’t candidates for further systemic therapy – the “frail without good options” – Dr. Ng said data about salvage radiotherapy is limited. However, a 2015 study tracked 65 patients who were treated with a median dose of 40 Gy with “curative” intent. Local control was “not great” at 72% at 2 years, Dr. Ng said, while overall survival was 60% and progress-free survival was 46%.

Dr. Ng, who was one of this study’s authors, said several groups did better: Those with refractory vs. relapsed disease and those who were responsive to chemotherapy vs. those who were not.

She also highlighted a similar 2019 study of 32 patients with refractory/relapsed disease treated with salvage radiotherapy (median dose of 42.7 Gy) found that 61.8% reached progress-free survival at 5 years – a better outcome.

Dr. Yang has no disclosures. Dr. Ng discloses royalties from UpToDate and Elsevier.
 

SAN DIEGO – Radiation has become a crucial component of treatment for diffuse large B cell lymphoma (DLBCL) over the past 25 years. But radiologists presenting at an annual conference cautioned colleagues to keep the limitations of radiology in mind and not to assume that it’s always a necessary adjunct to chemotherapy.

For example, radiation may not be needed for advanced-stage patients who’ve received at least four cycles of R-CHOP chemotherapy (cyclophosphamide, doxorubicin, vincristine, and prednisolone plus rituximab), and whose PET scans show no sign of disease at interim or end-of treatment phases, said Joanna Yang, MD, MPH, of Washington University in St. Louis, in a presentation at the annual meeting of the American Society for Radiation Oncology.

These patients “may be able to omit radiotherapy without sacrificing good outcomes,” Dr. Yang said. In contrast, those whose PET scans show signs of disease at interim and end-of-treatment points may benefit from radiotherapy to selected sites, she said.

Dr. Yang highlighted a 2021 study in Blood that tracked 723 patients with advanced-stage DLBCL who were diagnosed from 2005 to 2017. All were treated with R-CHOP, and some of those who were PET-positive – that is, showing signs of malignant disease – were treated with radiotherapy.

Over a mean follow-up of 4.3 years, the study reported “time to progression and overall survival at 3 years were 83% vs. 56% and 87% vs. 64% in patients with PET-NEG and PET-POS scans, respectively.”

These findings aren’t surprising, Dr. Yang said. But “the PET-positive patients who got radiation actually had outcomes that came close to the outcomes that the PET-negative patients were able to achieve.” Their 3-year overall survival was 80% vs. 87% in the PET-negative, no-radiation group vs. 44% in the PET-positive, no-radiation group.

Dr. Yang cautioned, however, that withholding radiation in PET-negative patients isn’t right for everyone: “This doesn’t mean this should be the approach for every single patient.”

What about early-stage DLBCL? In patients without risk factors, Dr. Yang recommends PET scans after four treatments with R-CHOP. “Getting that end-of-treatment PET is going to be super-critical because that’s going to help guide you in terms of the patients who you may feel comfortable omitting radiation versus the patients who remain PET-positive at the end of chemotherapy. Many places will also add an interim PET as well.”

According to her, radiotherapy is appropriate in patients who are PET-positive, based on the findings of the FLYER and LYSA-GOELAMS 02-03 trials.

In early-stage patients who have risk factors such as advanced age or bulky or extra-nodal disease, Dr. Yang suggests examining interim PET scans after three treatments with R-CHOP. If they are negative, another R-CHOP treatment is appropriate – with or without radiotherapy.

“There’s a lot that goes into that decision. The first thing I think about in patients who have risk factors is: What salvage options are available for my patient? Can they tolerate these salvage option? If they’re older, they might not be eligible for auto [autologous hematopoietic cell transplantation]. If they’re frail, they might not be eligible for auto or CAR T cells. If they have bulk, it’s certainly an area of concern. It seems like radiation does help control disease in areas of bulk for patients with DLBCL.”

If these patients are PET-positive, go directly to radiotherapy, Dr. Yang advised. Trials that support this approach include S1001, LYSA-GOELAMS 02-03, and RICOVER-noRTH, she said.

What about double-hit and triple-hit lymphomas, which are especially aggressive due to genetic variations? Research suggests that “even if double hit/triple hit is not responding to chemo, it still responds to radiation,” Dr. Yang said.

In regard to advanced-stage disease, “if patients are receiving full-dose chemo for least six cycles, I use that end-of-treatment PET to help guide me. And then I make an individualized decision based on how bulky that disease is, where the location is, how morbid a relapse would be. If they’re older or receiving reduced-dose chemotherapy, then I’ll more seriously consider radiation just because there are limited options for these patients. And we know that DLCBL is most commonly a disease of the elderly.”

In an adjoining presentation at ASTRO, Andrea Ng, MD, MPH, of Harvard Medical School/Dana-Farber Brigham Cancer Center, Boston, discussed which patients with incomplete response or refractory/relapsed DLCBL can benefit from radiotherapy.

She highlighted patients with good partial response and end-of-treatment PET-positive with evidence of residual 18F-fluorodeoxyglucose activity via PET scan (Deauville 4/5) – a group that “we’re increasingly seeing.” In these patients, “radiation can be quite effective” at doses of 36-45 Gy. She highlighted a study from 2011 that linked consolidation radiotherapy to 5-year event-free survival in 65% of patients.

As for relapsed/refractory disease in patients who aren’t candidates for further systemic therapy – the “frail without good options” – Dr. Ng said data about salvage radiotherapy is limited. However, a 2015 study tracked 65 patients who were treated with a median dose of 40 Gy with “curative” intent. Local control was “not great” at 72% at 2 years, Dr. Ng said, while overall survival was 60% and progress-free survival was 46%.

Dr. Ng, who was one of this study’s authors, said several groups did better: Those with refractory vs. relapsed disease and those who were responsive to chemotherapy vs. those who were not.

She also highlighted a similar 2019 study of 32 patients with refractory/relapsed disease treated with salvage radiotherapy (median dose of 42.7 Gy) found that 61.8% reached progress-free survival at 5 years – a better outcome.

Dr. Yang has no disclosures. Dr. Ng discloses royalties from UpToDate and Elsevier.
 

FROM SOHO 2023

It may be possible for patients with Hodgkin lymphoma to safely skip their interim PET-CT scan (PET2) following two cycles of frontline brentuximab vedotin (Adcetris), according to research presented at the annual meeting of the Society of Hematologic Oncology in Houston.

Data from four recent studies indicate that adding frontline brentuximab vedotin to AVD chemotherapy (doxorubicin, vinblastine, dacarbazine) improves outcomes for patients, regardless of PET2 scan results, according to lead investigator Ravand Samaeekia, MD, MSc, from Loma Linda (Calif.) University Medical Center.

These studies, including one conducted by Dr. Samaeekia’s team, provide “evidence for the safe omission of PET2 in treatment regimens that contain brentuximab vedotin,” Dr. Samaeekia, who presented the data, concluded.

Performing an interim PET-CT scan after two cycles of chemotherapy can help oncologists adapt treatment protocols for patients with Hodgkin lymphoma and has become the standard of care for these patients.

However, “there are obviously challenges associated with implementing a PET-guided approach,” said Dr. Samaeekia. Additional PET-CT scans can be costly, time consuming, and increase patients’ risk for toxicities when treatment is escalated based on the scan results.

Given these caveats, Dr. Samaeekia reviewed data exploring whether PET2 has predictive value for patients who receive the anti-CD30 antibody-drug conjugate, brentuximab vedotin, as part of first-line treatment alongside AVD chemotherapy.

Dr. Samaeekia’s team analyzed findings from three trials – ECHELON-1, AHOD1331, and BREACH – which assessed frontline standard of care chemotherapy with or without brentuximab. The team found that incorporating brentuximab into frontline treatment resulted in superior efficacy, and PET2 scans results generally did not change how patients were managed.

In ECHELON-1, 6-year overall survival favored patients with advanced Hodgkin lymphoma who received brentuximab and were PET2 negative (94.9% vs. 90.6%; hazard ratio for death, 0.54) as well as those who were PET2 positive (95% vs. 77%; HR, 0.16). Overall, just over 2% of patients who received the brentuximab regimen switched to an alternative chemotherapy and even fewer did so based on PET2 results.

In AHOD1331, 3-year event-free survival was significantly higher among adolescents and children with Hodgkin lymphoma who received brentuximab – 90.7% for those who had slow-responding lesions and 92.3% for those with rapid-responding lesions. Based on these results, the authors concluded that adding brentuximab “eliminated the predictive value of the interim PET assessment.” The BREACH trial echoed the findings from ECHELON-1 and AHOD1331.

Finally, in a retrospective study of 40 patients treated at Loma Linda with brentuximab vedotin plus AVD, Dr. Samaeekia and colleagues found that 24 were PET2 negative and 12 were PET2 positive. All patients who were PET2 negative remained negative on the end-of-treatment PET, indicating no cancer progression. Of the 12 PET2-positive patients, four (33%) remained PET positive at the end of treatment. Only one patient overall changed regimens following PET2.

Dr. Samaeekia’s team concluded that PET2 scan results “did not have any meaningful impact” on patient management or outcomes.

During the Q&A, Martin Hutchings, MD, PhD, challenged the idea that PET2 can be omitted. Dr. Hutchings, from the Rigshospitalet in Copenhagen, pointed out that 4 of the 12 PET2-positive patients treated at Loma Linda were still PET positive at the end of treatment.

Even so, Dr. Samaeekia explained, PET2 findings did not alter treatment for most patients, noting that doing a PET2 scan may make “us feel better,” but it ultimately doesn’t “make any difference in our management.”

In the AHOD1331 study, “the findings on the interim PET scan were not helpful in the ultimate outcome, whether it was either positive or negative,” added session comoderator Jonathan W. Friedberg, MD, MMSc, director of the James P. Wilmot Cancer Institute at the University of Rochester (N.Y.) Medical Center.

The study by Dr. Samaeekia and colleagues was internally funded. Dr. Samaeekia reports no relevant financial relationships. Dr. Hutchings has previously reported consultancy and research funding from numerous companies. Dr. Friedberg reports no relevant financial relationships.

A version of this article first appeared on Medscape.com.

FROM SOHO 2023

It may be possible for patients with Hodgkin lymphoma to safely skip their interim PET-CT scan (PET2) following two cycles of frontline brentuximab vedotin (Adcetris), according to research presented at the annual meeting of the Society of Hematologic Oncology in Houston.

Data from four recent studies indicate that adding frontline brentuximab vedotin to AVD chemotherapy (doxorubicin, vinblastine, dacarbazine) improves outcomes for patients, regardless of PET2 scan results, according to lead investigator Ravand Samaeekia, MD, MSc, from Loma Linda (Calif.) University Medical Center.

These studies, including one conducted by Dr. Samaeekia’s team, provide “evidence for the safe omission of PET2 in treatment regimens that contain brentuximab vedotin,” Dr. Samaeekia, who presented the data, concluded.

Performing an interim PET-CT scan after two cycles of chemotherapy can help oncologists adapt treatment protocols for patients with Hodgkin lymphoma and has become the standard of care for these patients.

However, “there are obviously challenges associated with implementing a PET-guided approach,” said Dr. Samaeekia. Additional PET-CT scans can be costly, time consuming, and increase patients’ risk for toxicities when treatment is escalated based on the scan results.

Given these caveats, Dr. Samaeekia reviewed data exploring whether PET2 has predictive value for patients who receive the anti-CD30 antibody-drug conjugate, brentuximab vedotin, as part of first-line treatment alongside AVD chemotherapy.

Dr. Samaeekia’s team analyzed findings from three trials – ECHELON-1, AHOD1331, and BREACH – which assessed frontline standard of care chemotherapy with or without brentuximab. The team found that incorporating brentuximab into frontline treatment resulted in superior efficacy, and PET2 scans results generally did not change how patients were managed.

In ECHELON-1, 6-year overall survival favored patients with advanced Hodgkin lymphoma who received brentuximab and were PET2 negative (94.9% vs. 90.6%; hazard ratio for death, 0.54) as well as those who were PET2 positive (95% vs. 77%; HR, 0.16). Overall, just over 2% of patients who received the brentuximab regimen switched to an alternative chemotherapy and even fewer did so based on PET2 results.

In AHOD1331, 3-year event-free survival was significantly higher among adolescents and children with Hodgkin lymphoma who received brentuximab – 90.7% for those who had slow-responding lesions and 92.3% for those with rapid-responding lesions. Based on these results, the authors concluded that adding brentuximab “eliminated the predictive value of the interim PET assessment.” The BREACH trial echoed the findings from ECHELON-1 and AHOD1331.

Finally, in a retrospective study of 40 patients treated at Loma Linda with brentuximab vedotin plus AVD, Dr. Samaeekia and colleagues found that 24 were PET2 negative and 12 were PET2 positive. All patients who were PET2 negative remained negative on the end-of-treatment PET, indicating no cancer progression. Of the 12 PET2-positive patients, four (33%) remained PET positive at the end of treatment. Only one patient overall changed regimens following PET2.

Dr. Samaeekia’s team concluded that PET2 scan results “did not have any meaningful impact” on patient management or outcomes.

During the Q&A, Martin Hutchings, MD, PhD, challenged the idea that PET2 can be omitted. Dr. Hutchings, from the Rigshospitalet in Copenhagen, pointed out that 4 of the 12 PET2-positive patients treated at Loma Linda were still PET positive at the end of treatment.

Even so, Dr. Samaeekia explained, PET2 findings did not alter treatment for most patients, noting that doing a PET2 scan may make “us feel better,” but it ultimately doesn’t “make any difference in our management.”

In the AHOD1331 study, “the findings on the interim PET scan were not helpful in the ultimate outcome, whether it was either positive or negative,” added session comoderator Jonathan W. Friedberg, MD, MMSc, director of the James P. Wilmot Cancer Institute at the University of Rochester (N.Y.) Medical Center.

The study by Dr. Samaeekia and colleagues was internally funded. Dr. Samaeekia reports no relevant financial relationships. Dr. Hutchings has previously reported consultancy and research funding from numerous companies. Dr. Friedberg reports no relevant financial relationships.

A version of this article first appeared on Medscape.com.

FROM SOHO 2023

It may be possible for patients with Hodgkin lymphoma to safely skip their interim PET-CT scan (PET2) following two cycles of frontline brentuximab vedotin (Adcetris), according to research presented at the annual meeting of the Society of Hematologic Oncology in Houston.

Data from four recent studies indicate that adding frontline brentuximab vedotin to AVD chemotherapy (doxorubicin, vinblastine, dacarbazine) improves outcomes for patients, regardless of PET2 scan results, according to lead investigator Ravand Samaeekia, MD, MSc, from Loma Linda (Calif.) University Medical Center.

These studies, including one conducted by Dr. Samaeekia’s team, provide “evidence for the safe omission of PET2 in treatment regimens that contain brentuximab vedotin,” Dr. Samaeekia, who presented the data, concluded.

Performing an interim PET-CT scan after two cycles of chemotherapy can help oncologists adapt treatment protocols for patients with Hodgkin lymphoma and has become the standard of care for these patients.

However, “there are obviously challenges associated with implementing a PET-guided approach,” said Dr. Samaeekia. Additional PET-CT scans can be costly, time consuming, and increase patients’ risk for toxicities when treatment is escalated based on the scan results.

Given these caveats, Dr. Samaeekia reviewed data exploring whether PET2 has predictive value for patients who receive the anti-CD30 antibody-drug conjugate, brentuximab vedotin, as part of first-line treatment alongside AVD chemotherapy.

Dr. Samaeekia’s team analyzed findings from three trials – ECHELON-1, AHOD1331, and BREACH – which assessed frontline standard of care chemotherapy with or without brentuximab. The team found that incorporating brentuximab into frontline treatment resulted in superior efficacy, and PET2 scans results generally did not change how patients were managed.

In ECHELON-1, 6-year overall survival favored patients with advanced Hodgkin lymphoma who received brentuximab and were PET2 negative (94.9% vs. 90.6%; hazard ratio for death, 0.54) as well as those who were PET2 positive (95% vs. 77%; HR, 0.16). Overall, just over 2% of patients who received the brentuximab regimen switched to an alternative chemotherapy and even fewer did so based on PET2 results.

In AHOD1331, 3-year event-free survival was significantly higher among adolescents and children with Hodgkin lymphoma who received brentuximab – 90.7% for those who had slow-responding lesions and 92.3% for those with rapid-responding lesions. Based on these results, the authors concluded that adding brentuximab “eliminated the predictive value of the interim PET assessment.” The BREACH trial echoed the findings from ECHELON-1 and AHOD1331.

Finally, in a retrospective study of 40 patients treated at Loma Linda with brentuximab vedotin plus AVD, Dr. Samaeekia and colleagues found that 24 were PET2 negative and 12 were PET2 positive. All patients who were PET2 negative remained negative on the end-of-treatment PET, indicating no cancer progression. Of the 12 PET2-positive patients, four (33%) remained PET positive at the end of treatment. Only one patient overall changed regimens following PET2.

Dr. Samaeekia’s team concluded that PET2 scan results “did not have any meaningful impact” on patient management or outcomes.

During the Q&A, Martin Hutchings, MD, PhD, challenged the idea that PET2 can be omitted. Dr. Hutchings, from the Rigshospitalet in Copenhagen, pointed out that 4 of the 12 PET2-positive patients treated at Loma Linda were still PET positive at the end of treatment.

Even so, Dr. Samaeekia explained, PET2 findings did not alter treatment for most patients, noting that doing a PET2 scan may make “us feel better,” but it ultimately doesn’t “make any difference in our management.”

In the AHOD1331 study, “the findings on the interim PET scan were not helpful in the ultimate outcome, whether it was either positive or negative,” added session comoderator Jonathan W. Friedberg, MD, MMSc, director of the James P. Wilmot Cancer Institute at the University of Rochester (N.Y.) Medical Center.

The study by Dr. Samaeekia and colleagues was internally funded. Dr. Samaeekia reports no relevant financial relationships. Dr. Hutchings has previously reported consultancy and research funding from numerous companies. Dr. Friedberg reports no relevant financial relationships.

A version of this article first appeared on Medscape.com.

Early, intriguing research suggests that preventing acute graft-versus-host disease (GVHD) in the gut – a potentially life-threatening complication of allogeneic hematopoietic cell transplantation (allo-HCT) – could be accomplished by the administration of a single antibody that targets the anti-DLL4 Notch signaling pathway, without compromising the stem cell transplant.

“The major surprise was that none of the anti–DLL4-treated animals developed acute gastrointestinal GVHD for the entire duration of the study. This was a remarkable finding, given that intestinal GVHD is otherwise seen in the vast majority of nonhuman primate transplant recipients that receive either no prophylaxis, or prophylaxis with agents other than anti-DLL4 antibodies,” co–senior author Ivan Maillard, MD, PhD, a professor of medicine and vice chief for research in hematology-oncology at the University of Pennsylvania, Philadelphia, said in an interview.

“The timing was critical,” the authors noted in the study, recently published in Science Translational Medicine. “Intervening before any symptoms of GvHD appear made the long-term protection possible.”

While GVHD may be mild to moderate in chronic forms, acute cases can be serious, if not fatal, and nearly all severe acute GVHD prominently involves the gastrointestinal tract, which can drive activation of pathogenic T cells and potentially lead to tissue damage following allo-HCT.

Systemic corticosteroids are standard first-line treatment for acute GVHD. However, response rates generally range only from 40% to 60%, and there are concerns of side effects. Meanwhile, second-line treatments are of inconsistent benefit.

With previous studies on mice showing benefits of targeting Notch pathway inhibition, particularly DLL4, Dr. Maillard and colleagues further investigated the effects in nonhuman primates that were allo-HCT recipients, using the anti-DLL4 antibody REGN421, which has pharmacokinetic and toxicity information available from previous studies.

The nonhuman primates were treated with one of two dosing regimens: a single dose of REGN421 3 mg/kg at baseline, post HCT, (n = 7) or three weekly doses at days 0, 7 and 14, post transplant (n = 4). Those primates were compared with 11 primates receiving allo-HCT transplants that received supportive care only.

Primates receiving three weekly doses of REGN421 showed antibody concentrations of greater than 2 mcg/mL for more than 30 days post HCT. A single dose of REGN421 was associated with protection from acute GVHD at day 0, while three weekly doses showed protection at day 0, 7, and 14, consistent with an impact of REGN421 during the early phases of T-cell activation.

Compared with animals receiving only supportive care, prophylaxis with REGN421 was associated with delayed acute GVHD onset and lengthened survival.

Of the 11 primates treated with REGN421, none developed clinical signs of gastrointestinal acute GVHD, whereas the majority of those receiving standard care or other preventive interventions did.

“Detailed analysis of acute GVHD clinical presentations in REGN421-treated animals in comparison to no treatment controls revealed near complete protection from GI-acute GvHD with REGN421,” the authors reported.

Furthermore, pathology scores in the gastrointestinal tract were lower with REGN421 treatment, compared with the no-treatment cohort, and the scores matched those of healthy nontransplanted nonhuman primates.

The primates treated with REGN421 did ultimately develop other clinical and pathologic signs of skin, hepatic or pulmonary acute GVHD, but without gastrointestinal disease.

The treatment was not associated with any adverse effects on the allo-HCT, with primates receiving either a single dose or three weekly doses of REGN421 showing rapid donor engraftment after allo-HCT, including high bone marrow, whole blood, and T-cell donor chimerism.

“Reassuringly, short-term systemic DLL4 blockade with REGN421 did not trigger unexpected side effects in our nonhuman primate model, while preserving rapid engraftment as well hematopoietic and immune reconstitution.”

The mechanism preserving the engraftment, described as a “major surprise,” specifically involved DLL4 inhibition blocking the homing of pathogenic T cells to the gut while preserving homing of regulatory T cells that dampen the immune response, Dr. Maillard explained.

“This effect turned out to be at least in part through a posttranslational effect of DLL4/Notch blockade on integrin pairing at the T-cell surface,” he explained. “This was a novel and quite unexpected mechanism of action conserved from mice to nonhuman primates.”

The results are encouraging in terms of translating to humans because of their closer similarities in various physiological factors, Dr. Maillard said.

“The nonhuman primate model of transplantation [offers] a transplantation model very close to what is being performed in humans, as well as the opportunity to study an immune system very similar to that of humans in nonhuman primates,” he said.

Dr. Maillard noted that, while trials in humans are not underway yet, “we are in active discussions about it,” and the team is indeed interested in testing REGN421 itself, with the effects likely to be as a prophylactic strategy.

There are currently no approved anti-DLL4 antibody drugs for use in humans.

“Our approach is mostly promising as a preventive treatment, rather than as a secondary treatment for GVHD, because DLL4/Notch blockade seems most active when applied early after transplantation during the time of initial seeding of the gut by T cells (in mice, we had observed the critical time window for a successful intervention to be within 48 hours of transplantation),” Dr. Maillard said.“There remain questions about which other prophylactic treatments we should ideally combine anti-DLL4 antibodies with.”

Dr. Maillard has received research funding from Regeneron and Genentech and is a member of Garuda Therapeutics’s scientific advisory board.

Early, intriguing research suggests that preventing acute graft-versus-host disease (GVHD) in the gut – a potentially life-threatening complication of allogeneic hematopoietic cell transplantation (allo-HCT) – could be accomplished by the administration of a single antibody that targets the anti-DLL4 Notch signaling pathway, without compromising the stem cell transplant.

“The major surprise was that none of the anti–DLL4-treated animals developed acute gastrointestinal GVHD for the entire duration of the study. This was a remarkable finding, given that intestinal GVHD is otherwise seen in the vast majority of nonhuman primate transplant recipients that receive either no prophylaxis, or prophylaxis with agents other than anti-DLL4 antibodies,” co–senior author Ivan Maillard, MD, PhD, a professor of medicine and vice chief for research in hematology-oncology at the University of Pennsylvania, Philadelphia, said in an interview.

“The timing was critical,” the authors noted in the study, recently published in Science Translational Medicine. “Intervening before any symptoms of GvHD appear made the long-term protection possible.”

While GVHD may be mild to moderate in chronic forms, acute cases can be serious, if not fatal, and nearly all severe acute GVHD prominently involves the gastrointestinal tract, which can drive activation of pathogenic T cells and potentially lead to tissue damage following allo-HCT.

Systemic corticosteroids are standard first-line treatment for acute GVHD. However, response rates generally range only from 40% to 60%, and there are concerns of side effects. Meanwhile, second-line treatments are of inconsistent benefit.

With previous studies on mice showing benefits of targeting Notch pathway inhibition, particularly DLL4, Dr. Maillard and colleagues further investigated the effects in nonhuman primates that were allo-HCT recipients, using the anti-DLL4 antibody REGN421, which has pharmacokinetic and toxicity information available from previous studies.

The nonhuman primates were treated with one of two dosing regimens: a single dose of REGN421 3 mg/kg at baseline, post HCT, (n = 7) or three weekly doses at days 0, 7 and 14, post transplant (n = 4). Those primates were compared with 11 primates receiving allo-HCT transplants that received supportive care only.

Primates receiving three weekly doses of REGN421 showed antibody concentrations of greater than 2 mcg/mL for more than 30 days post HCT. A single dose of REGN421 was associated with protection from acute GVHD at day 0, while three weekly doses showed protection at day 0, 7, and 14, consistent with an impact of REGN421 during the early phases of T-cell activation.

Compared with animals receiving only supportive care, prophylaxis with REGN421 was associated with delayed acute GVHD onset and lengthened survival.

Of the 11 primates treated with REGN421, none developed clinical signs of gastrointestinal acute GVHD, whereas the majority of those receiving standard care or other preventive interventions did.

“Detailed analysis of acute GVHD clinical presentations in REGN421-treated animals in comparison to no treatment controls revealed near complete protection from GI-acute GvHD with REGN421,” the authors reported.

Furthermore, pathology scores in the gastrointestinal tract were lower with REGN421 treatment, compared with the no-treatment cohort, and the scores matched those of healthy nontransplanted nonhuman primates.

The primates treated with REGN421 did ultimately develop other clinical and pathologic signs of skin, hepatic or pulmonary acute GVHD, but without gastrointestinal disease.

The treatment was not associated with any adverse effects on the allo-HCT, with primates receiving either a single dose or three weekly doses of REGN421 showing rapid donor engraftment after allo-HCT, including high bone marrow, whole blood, and T-cell donor chimerism.

“Reassuringly, short-term systemic DLL4 blockade with REGN421 did not trigger unexpected side effects in our nonhuman primate model, while preserving rapid engraftment as well hematopoietic and immune reconstitution.”

The mechanism preserving the engraftment, described as a “major surprise,” specifically involved DLL4 inhibition blocking the homing of pathogenic T cells to the gut while preserving homing of regulatory T cells that dampen the immune response, Dr. Maillard explained.

“This effect turned out to be at least in part through a posttranslational effect of DLL4/Notch blockade on integrin pairing at the T-cell surface,” he explained. “This was a novel and quite unexpected mechanism of action conserved from mice to nonhuman primates.”

The results are encouraging in terms of translating to humans because of their closer similarities in various physiological factors, Dr. Maillard said.

“The nonhuman primate model of transplantation [offers] a transplantation model very close to what is being performed in humans, as well as the opportunity to study an immune system very similar to that of humans in nonhuman primates,” he said.

Dr. Maillard noted that, while trials in humans are not underway yet, “we are in active discussions about it,” and the team is indeed interested in testing REGN421 itself, with the effects likely to be as a prophylactic strategy.

There are currently no approved anti-DLL4 antibody drugs for use in humans.

“Our approach is mostly promising as a preventive treatment, rather than as a secondary treatment for GVHD, because DLL4/Notch blockade seems most active when applied early after transplantation during the time of initial seeding of the gut by T cells (in mice, we had observed the critical time window for a successful intervention to be within 48 hours of transplantation),” Dr. Maillard said.“There remain questions about which other prophylactic treatments we should ideally combine anti-DLL4 antibodies with.”

Dr. Maillard has received research funding from Regeneron and Genentech and is a member of Garuda Therapeutics’s scientific advisory board.

Early, intriguing research suggests that preventing acute graft-versus-host disease (GVHD) in the gut – a potentially life-threatening complication of allogeneic hematopoietic cell transplantation (allo-HCT) – could be accomplished by the administration of a single antibody that targets the anti-DLL4 Notch signaling pathway, without compromising the stem cell transplant.

“The major surprise was that none of the anti–DLL4-treated animals developed acute gastrointestinal GVHD for the entire duration of the study. This was a remarkable finding, given that intestinal GVHD is otherwise seen in the vast majority of nonhuman primate transplant recipients that receive either no prophylaxis, or prophylaxis with agents other than anti-DLL4 antibodies,” co–senior author Ivan Maillard, MD, PhD, a professor of medicine and vice chief for research in hematology-oncology at the University of Pennsylvania, Philadelphia, said in an interview.

“The timing was critical,” the authors noted in the study, recently published in Science Translational Medicine. “Intervening before any symptoms of GvHD appear made the long-term protection possible.”

While GVHD may be mild to moderate in chronic forms, acute cases can be serious, if not fatal, and nearly all severe acute GVHD prominently involves the gastrointestinal tract, which can drive activation of pathogenic T cells and potentially lead to tissue damage following allo-HCT.

Systemic corticosteroids are standard first-line treatment for acute GVHD. However, response rates generally range only from 40% to 60%, and there are concerns of side effects. Meanwhile, second-line treatments are of inconsistent benefit.

With previous studies on mice showing benefits of targeting Notch pathway inhibition, particularly DLL4, Dr. Maillard and colleagues further investigated the effects in nonhuman primates that were allo-HCT recipients, using the anti-DLL4 antibody REGN421, which has pharmacokinetic and toxicity information available from previous studies.

The nonhuman primates were treated with one of two dosing regimens: a single dose of REGN421 3 mg/kg at baseline, post HCT, (n = 7) or three weekly doses at days 0, 7 and 14, post transplant (n = 4). Those primates were compared with 11 primates receiving allo-HCT transplants that received supportive care only.

Primates receiving three weekly doses of REGN421 showed antibody concentrations of greater than 2 mcg/mL for more than 30 days post HCT. A single dose of REGN421 was associated with protection from acute GVHD at day 0, while three weekly doses showed protection at day 0, 7, and 14, consistent with an impact of REGN421 during the early phases of T-cell activation.

Compared with animals receiving only supportive care, prophylaxis with REGN421 was associated with delayed acute GVHD onset and lengthened survival.

Of the 11 primates treated with REGN421, none developed clinical signs of gastrointestinal acute GVHD, whereas the majority of those receiving standard care or other preventive interventions did.

“Detailed analysis of acute GVHD clinical presentations in REGN421-treated animals in comparison to no treatment controls revealed near complete protection from GI-acute GvHD with REGN421,” the authors reported.

Furthermore, pathology scores in the gastrointestinal tract were lower with REGN421 treatment, compared with the no-treatment cohort, and the scores matched those of healthy nontransplanted nonhuman primates.

The primates treated with REGN421 did ultimately develop other clinical and pathologic signs of skin, hepatic or pulmonary acute GVHD, but without gastrointestinal disease.

The treatment was not associated with any adverse effects on the allo-HCT, with primates receiving either a single dose or three weekly doses of REGN421 showing rapid donor engraftment after allo-HCT, including high bone marrow, whole blood, and T-cell donor chimerism.

“Reassuringly, short-term systemic DLL4 blockade with REGN421 did not trigger unexpected side effects in our nonhuman primate model, while preserving rapid engraftment as well hematopoietic and immune reconstitution.”

The mechanism preserving the engraftment, described as a “major surprise,” specifically involved DLL4 inhibition blocking the homing of pathogenic T cells to the gut while preserving homing of regulatory T cells that dampen the immune response, Dr. Maillard explained.

“This effect turned out to be at least in part through a posttranslational effect of DLL4/Notch blockade on integrin pairing at the T-cell surface,” he explained. “This was a novel and quite unexpected mechanism of action conserved from mice to nonhuman primates.”

The results are encouraging in terms of translating to humans because of their closer similarities in various physiological factors, Dr. Maillard said.

“The nonhuman primate model of transplantation [offers] a transplantation model very close to what is being performed in humans, as well as the opportunity to study an immune system very similar to that of humans in nonhuman primates,” he said.

Dr. Maillard noted that, while trials in humans are not underway yet, “we are in active discussions about it,” and the team is indeed interested in testing REGN421 itself, with the effects likely to be as a prophylactic strategy.

There are currently no approved anti-DLL4 antibody drugs for use in humans.

“Our approach is mostly promising as a preventive treatment, rather than as a secondary treatment for GVHD, because DLL4/Notch blockade seems most active when applied early after transplantation during the time of initial seeding of the gut by T cells (in mice, we had observed the critical time window for a successful intervention to be within 48 hours of transplantation),” Dr. Maillard said.“There remain questions about which other prophylactic treatments we should ideally combine anti-DLL4 antibodies with.”

Dr. Maillard has received research funding from Regeneron and Genentech and is a member of Garuda Therapeutics’s scientific advisory board.

The European Society for Medical Oncology (ESMO), in collaboration with the European Hematology Association, has released a tool to help hematologists evaluate the magnitude of clinical benefit expected from new blood cancer treatments.

It consists of 11 2- to 3-page forms with checklists to grade treatment trials on the extent to which they meet efficacy and safety thresholds. Each of the 11 forms covers a specific trial scenario, such as a randomized controlled trial with curative intent or a trial of a therapy that is not likely to be curative with a primary endpoint of overall survival.

Treatments with curative intent are graded A, B, or C, while treatments in the noncurative setting are graded on a descending scale from 5 to 1. Scores of A and B in the curative setting and 5 and 4 in the noncurative setting represent substantial benefit.

On the form for RCTs with curative intent, for instance, a survival improvement of 5% or more garners an A but an improvement of less than 3% gets a C. Scores are also annotated for serious acute and/or persistent toxicity if present.

The tool, dubbed the ESMO-MCBS:H (European Society for Medical Oncology Magnitude of Clinical Benefit Scale: Hematology), is explained in an article published in Annals of Oncology. The evaluation forms are available online.

The idea behind the work is to help health care professionals and others to more “accurately assess the value of and prioritise therapies for patients with blood cancers. For clinicians, ESMO-MCBS:H will aid in their clinical decision-making and in the development of evidence-based practice and guidelines,” ESMO said in a press release.

To develop ESMO-MCBS:H, the group tailored its tool for evaluating solid tumor therapies, the ESMO-MCBS, to account for the sometimes different endpoints used in hematologic malignancy trials and the very indolent nature of some blood cancers, such as follicular lymphoma, which hampers development of mature data.

Specific changes include adding a new evaluation form to grade single-arm trials with curative intent, such as those used for CAR-T-cell therapies; incorporating molecular surrogate endpoints used in CML trials; and adding a way to grade outcomes for indolent cancers, among others.

The development process included applying the solid tumor tool to 80 blood cancer studies to identify shortcomings and improve its applicability. The final tool was field tested with 51 international experts from EHA and ESMO who largely agreed on the reasonableness of the trial scores.

ESMO said it expects ESMO-MCBS:H will be useful. The solid tumor tool, first published in 2015, is used by the World Health Organization to screen medications for its essential medicines list as well as by ESMO to generate guidelines and oncology centers across Europe to help with resource allocation decisions.

The European Society for Medical Oncology (ESMO), in collaboration with the European Hematology Association, has released a tool to help hematologists evaluate the magnitude of clinical benefit expected from new blood cancer treatments.

It consists of 11 2- to 3-page forms with checklists to grade treatment trials on the extent to which they meet efficacy and safety thresholds. Each of the 11 forms covers a specific trial scenario, such as a randomized controlled trial with curative intent or a trial of a therapy that is not likely to be curative with a primary endpoint of overall survival.

Treatments with curative intent are graded A, B, or C, while treatments in the noncurative setting are graded on a descending scale from 5 to 1. Scores of A and B in the curative setting and 5 and 4 in the noncurative setting represent substantial benefit.

On the form for RCTs with curative intent, for instance, a survival improvement of 5% or more garners an A but an improvement of less than 3% gets a C. Scores are also annotated for serious acute and/or persistent toxicity if present.

The tool, dubbed the ESMO-MCBS:H (European Society for Medical Oncology Magnitude of Clinical Benefit Scale: Hematology), is explained in an article published in Annals of Oncology. The evaluation forms are available online.

The idea behind the work is to help health care professionals and others to more “accurately assess the value of and prioritise therapies for patients with blood cancers. For clinicians, ESMO-MCBS:H will aid in their clinical decision-making and in the development of evidence-based practice and guidelines,” ESMO said in a press release.

To develop ESMO-MCBS:H, the group tailored its tool for evaluating solid tumor therapies, the ESMO-MCBS, to account for the sometimes different endpoints used in hematologic malignancy trials and the very indolent nature of some blood cancers, such as follicular lymphoma, which hampers development of mature data.

Specific changes include adding a new evaluation form to grade single-arm trials with curative intent, such as those used for CAR-T-cell therapies; incorporating molecular surrogate endpoints used in CML trials; and adding a way to grade outcomes for indolent cancers, among others.

The development process included applying the solid tumor tool to 80 blood cancer studies to identify shortcomings and improve its applicability. The final tool was field tested with 51 international experts from EHA and ESMO who largely agreed on the reasonableness of the trial scores.

ESMO said it expects ESMO-MCBS:H will be useful. The solid tumor tool, first published in 2015, is used by the World Health Organization to screen medications for its essential medicines list as well as by ESMO to generate guidelines and oncology centers across Europe to help with resource allocation decisions.

The European Society for Medical Oncology (ESMO), in collaboration with the European Hematology Association, has released a tool to help hematologists evaluate the magnitude of clinical benefit expected from new blood cancer treatments.

It consists of 11 2- to 3-page forms with checklists to grade treatment trials on the extent to which they meet efficacy and safety thresholds. Each of the 11 forms covers a specific trial scenario, such as a randomized controlled trial with curative intent or a trial of a therapy that is not likely to be curative with a primary endpoint of overall survival.

Treatments with curative intent are graded A, B, or C, while treatments in the noncurative setting are graded on a descending scale from 5 to 1. Scores of A and B in the curative setting and 5 and 4 in the noncurative setting represent substantial benefit.

On the form for RCTs with curative intent, for instance, a survival improvement of 5% or more garners an A but an improvement of less than 3% gets a C. Scores are also annotated for serious acute and/or persistent toxicity if present.

The tool, dubbed the ESMO-MCBS:H (European Society for Medical Oncology Magnitude of Clinical Benefit Scale: Hematology), is explained in an article published in Annals of Oncology. The evaluation forms are available online.

The idea behind the work is to help health care professionals and others to more “accurately assess the value of and prioritise therapies for patients with blood cancers. For clinicians, ESMO-MCBS:H will aid in their clinical decision-making and in the development of evidence-based practice and guidelines,” ESMO said in a press release.

To develop ESMO-MCBS:H, the group tailored its tool for evaluating solid tumor therapies, the ESMO-MCBS, to account for the sometimes different endpoints used in hematologic malignancy trials and the very indolent nature of some blood cancers, such as follicular lymphoma, which hampers development of mature data.

Specific changes include adding a new evaluation form to grade single-arm trials with curative intent, such as those used for CAR-T-cell therapies; incorporating molecular surrogate endpoints used in CML trials; and adding a way to grade outcomes for indolent cancers, among others.

The development process included applying the solid tumor tool to 80 blood cancer studies to identify shortcomings and improve its applicability. The final tool was field tested with 51 international experts from EHA and ESMO who largely agreed on the reasonableness of the trial scores.

ESMO said it expects ESMO-MCBS:H will be useful. The solid tumor tool, first published in 2015, is used by the World Health Organization to screen medications for its essential medicines list as well as by ESMO to generate guidelines and oncology centers across Europe to help with resource allocation decisions.

CHICAGO – Clinical trials are so White. Only a small percentage of eligible patients participate in clinical trials in the first place, and very few come from racial and ethnic minority groups.

For example, according to the Food and Drug Administration, in trials that resulted in drug approvals from 2017 to 2020, only 2%-5% of participants were Black patients.

When clinical trials lack diverse patient populations, those who are left out have fewer opportunities to get new therapies. Moreover, the scope of the research is limited by smaller phenotypic and genotypic samples, and the trial results are applicable only to more homogeneous patient groups.

There has been a push to include more underrepresented patients in clinical trials. One group reported its success in doing so here at the annual meeting of the American Society of Clinical Oncology.

Researchers from the Alliance for Clinical Trials in Oncology explained how a multifaceted approach resulted in a 75% relative improvement in trial enrollment from 2014 to 2022, a period that included a pandemic-induced hiatus in clinical trials in general.

Alliance member Electra D. Paskett, PhD, from the College of Public Health at the Ohio State University in Columbus, presented accrual data from 117 trials led by the Alliance from 2014 to 2022.

During this period, accrual of racial and ethnic minority patients increased from 13.6% to 25.3% for cancer treatment trials and from 13% to 21.5% for cancer control trials.

Overall, the recruitment program resulted in an absolute increase from 13.5 % to 23.6% of underrepresented populations, which translated into a relative 74.8% improvement.

“We’re focusing now on monitoring accrual of women, rural populations, younger AYAs [adolescents and young adults] and older patients, and we’ll see what strategies we need to implement,” Dr. Packett told this news organization.

The Alliance has implemented a real-time accrual dashboard on its website that allows individual sites to review accrual by trial and overall for all of the identified underrepresented populations, she noted.
 

Program to increase underrepresented patient accrual

The impetus for the program to increase enrollment of underrepresented patients came from the goal set by Monica M. Bertagnolli, MD, group chair of the Alliance from 2011 to 2022 and currently the director of the U.S. National Cancer Institute.

“Our leader, Dr. Bertagnolli, set out a group-wide goal for accrual of underrepresented minorities to our trials of 20%, and that gave us permission to implement a whole host of new strategies,” Dr. Paskett said in an interview.

“These strategies follow the Accrual of Clinical Trials framework, which essentially says that the interaction between the patient and the provider for going on a clinical trial is not just an interaction between the patient and provider but recognizes, for example, that the provider has coworkers and they have norms and beliefs and attitudes, and the patient comes from a family with their own values. And then there are system-level barriers, and there are community barriers that all relate to this interaction about going on a trial,” Dr. Packett said.
 

What works?

The study was presented as a poster at the meeting. During the poster discussion session, comoderator Victoria S. Blinder, MD, from Memorial Sloan Kettering Cancer Center in New York, asked Dr. Paskett, “If you had a certain amount of money and you really wanted to use that resource to focus on one area, where would you put that resource?”

“I’m going to violate the rules of your question,” Dr. Paskett replied.

“You cannot change this problem by focusing on one thing, and that’s what we showed in our Alliance poster, and what I’ve said is based on over 30 years of work in this area,” she said.

She cited what she considered as the two most important components for improving accrual of underrepresented populations: a commitment by leadership to a recruitment goal, and the development of protocols with specific accrual goals for minority populations.

Still, those are only two components of a comprehensive program that includes the aforementioned accrual goal set by Dr. Bertagnolli, as well as the following:

• Funding of minority junior investigators and research that focuses on issues of concern to underrepresented populations.
• Establishment of work groups that focus on specific populations with the Alliance health disparities committee.
• Translation of informational materials for patients.
• Opening studies at National Cancer Institute Community. Oncology Research Program–designated minority underserved sites.
• Real-time monitoring of accrual demographics by the Alliance and at the trial site.
• Closing protocol enrollment to majority populations.
• Increasing the study sample sizes to enroll additional minority participants and to allow for subgroup analyses.

The study was funded by the National Institutes of Health. Dr. Packett and Dr. Blinder reported no relevant financial relationships.

A version of this article originally appeared on Medscape.com.

CHICAGO – Clinical trials are so White. Only a small percentage of eligible patients participate in clinical trials in the first place, and very few come from racial and ethnic minority groups.

For example, according to the Food and Drug Administration, in trials that resulted in drug approvals from 2017 to 2020, only 2%-5% of participants were Black patients.

When clinical trials lack diverse patient populations, those who are left out have fewer opportunities to get new therapies. Moreover, the scope of the research is limited by smaller phenotypic and genotypic samples, and the trial results are applicable only to more homogeneous patient groups.

There has been a push to include more underrepresented patients in clinical trials. One group reported its success in doing so here at the annual meeting of the American Society of Clinical Oncology.

Researchers from the Alliance for Clinical Trials in Oncology explained how a multifaceted approach resulted in a 75% relative improvement in trial enrollment from 2014 to 2022, a period that included a pandemic-induced hiatus in clinical trials in general.

Alliance member Electra D. Paskett, PhD, from the College of Public Health at the Ohio State University in Columbus, presented accrual data from 117 trials led by the Alliance from 2014 to 2022.

During this period, accrual of racial and ethnic minority patients increased from 13.6% to 25.3% for cancer treatment trials and from 13% to 21.5% for cancer control trials.

Overall, the recruitment program resulted in an absolute increase from 13.5 % to 23.6% of underrepresented populations, which translated into a relative 74.8% improvement.

“We’re focusing now on monitoring accrual of women, rural populations, younger AYAs [adolescents and young adults] and older patients, and we’ll see what strategies we need to implement,” Dr. Packett told this news organization.

The Alliance has implemented a real-time accrual dashboard on its website that allows individual sites to review accrual by trial and overall for all of the identified underrepresented populations, she noted.
 

Program to increase underrepresented patient accrual

The impetus for the program to increase enrollment of underrepresented patients came from the goal set by Monica M. Bertagnolli, MD, group chair of the Alliance from 2011 to 2022 and currently the director of the U.S. National Cancer Institute.

“Our leader, Dr. Bertagnolli, set out a group-wide goal for accrual of underrepresented minorities to our trials of 20%, and that gave us permission to implement a whole host of new strategies,” Dr. Paskett said in an interview.

“These strategies follow the Accrual of Clinical Trials framework, which essentially says that the interaction between the patient and the provider for going on a clinical trial is not just an interaction between the patient and provider but recognizes, for example, that the provider has coworkers and they have norms and beliefs and attitudes, and the patient comes from a family with their own values. And then there are system-level barriers, and there are community barriers that all relate to this interaction about going on a trial,” Dr. Packett said.
 

What works?

The study was presented as a poster at the meeting. During the poster discussion session, comoderator Victoria S. Blinder, MD, from Memorial Sloan Kettering Cancer Center in New York, asked Dr. Paskett, “If you had a certain amount of money and you really wanted to use that resource to focus on one area, where would you put that resource?”

“I’m going to violate the rules of your question,” Dr. Paskett replied.

“You cannot change this problem by focusing on one thing, and that’s what we showed in our Alliance poster, and what I’ve said is based on over 30 years of work in this area,” she said.

She cited what she considered as the two most important components for improving accrual of underrepresented populations: a commitment by leadership to a recruitment goal, and the development of protocols with specific accrual goals for minority populations.

Still, those are only two components of a comprehensive program that includes the aforementioned accrual goal set by Dr. Bertagnolli, as well as the following:

• Funding of minority junior investigators and research that focuses on issues of concern to underrepresented populations.
• Establishment of work groups that focus on specific populations with the Alliance health disparities committee.
• Translation of informational materials for patients.
• Opening studies at National Cancer Institute Community. Oncology Research Program–designated minority underserved sites.
• Real-time monitoring of accrual demographics by the Alliance and at the trial site.
• Closing protocol enrollment to majority populations.
• Increasing the study sample sizes to enroll additional minority participants and to allow for subgroup analyses.

The study was funded by the National Institutes of Health. Dr. Packett and Dr. Blinder reported no relevant financial relationships.

A version of this article originally appeared on Medscape.com.

CHICAGO – Clinical trials are so White. Only a small percentage of eligible patients participate in clinical trials in the first place, and very few come from racial and ethnic minority groups.

For example, according to the Food and Drug Administration, in trials that resulted in drug approvals from 2017 to 2020, only 2%-5% of participants were Black patients.

When clinical trials lack diverse patient populations, those who are left out have fewer opportunities to get new therapies. Moreover, the scope of the research is limited by smaller phenotypic and genotypic samples, and the trial results are applicable only to more homogeneous patient groups.

There has been a push to include more underrepresented patients in clinical trials. One group reported its success in doing so here at the annual meeting of the American Society of Clinical Oncology.

Researchers from the Alliance for Clinical Trials in Oncology explained how a multifaceted approach resulted in a 75% relative improvement in trial enrollment from 2014 to 2022, a period that included a pandemic-induced hiatus in clinical trials in general.

Alliance member Electra D. Paskett, PhD, from the College of Public Health at the Ohio State University in Columbus, presented accrual data from 117 trials led by the Alliance from 2014 to 2022.

During this period, accrual of racial and ethnic minority patients increased from 13.6% to 25.3% for cancer treatment trials and from 13% to 21.5% for cancer control trials.

Overall, the recruitment program resulted in an absolute increase from 13.5 % to 23.6% of underrepresented populations, which translated into a relative 74.8% improvement.

“We’re focusing now on monitoring accrual of women, rural populations, younger AYAs [adolescents and young adults] and older patients, and we’ll see what strategies we need to implement,” Dr. Packett told this news organization.

The Alliance has implemented a real-time accrual dashboard on its website that allows individual sites to review accrual by trial and overall for all of the identified underrepresented populations, she noted.
 

Program to increase underrepresented patient accrual

The impetus for the program to increase enrollment of underrepresented patients came from the goal set by Monica M. Bertagnolli, MD, group chair of the Alliance from 2011 to 2022 and currently the director of the U.S. National Cancer Institute.

“Our leader, Dr. Bertagnolli, set out a group-wide goal for accrual of underrepresented minorities to our trials of 20%, and that gave us permission to implement a whole host of new strategies,” Dr. Paskett said in an interview.

“These strategies follow the Accrual of Clinical Trials framework, which essentially says that the interaction between the patient and the provider for going on a clinical trial is not just an interaction between the patient and provider but recognizes, for example, that the provider has coworkers and they have norms and beliefs and attitudes, and the patient comes from a family with their own values. And then there are system-level barriers, and there are community barriers that all relate to this interaction about going on a trial,” Dr. Packett said.
 

What works?

The study was presented as a poster at the meeting. During the poster discussion session, comoderator Victoria S. Blinder, MD, from Memorial Sloan Kettering Cancer Center in New York, asked Dr. Paskett, “If you had a certain amount of money and you really wanted to use that resource to focus on one area, where would you put that resource?”

“I’m going to violate the rules of your question,” Dr. Paskett replied.

“You cannot change this problem by focusing on one thing, and that’s what we showed in our Alliance poster, and what I’ve said is based on over 30 years of work in this area,” she said.

She cited what she considered as the two most important components for improving accrual of underrepresented populations: a commitment by leadership to a recruitment goal, and the development of protocols with specific accrual goals for minority populations.

Still, those are only two components of a comprehensive program that includes the aforementioned accrual goal set by Dr. Bertagnolli, as well as the following:

• Funding of minority junior investigators and research that focuses on issues of concern to underrepresented populations.
• Establishment of work groups that focus on specific populations with the Alliance health disparities committee.
• Translation of informational materials for patients.
• Opening studies at National Cancer Institute Community. Oncology Research Program–designated minority underserved sites.
• Real-time monitoring of accrual demographics by the Alliance and at the trial site.
• Closing protocol enrollment to majority populations.
• Increasing the study sample sizes to enroll additional minority participants and to allow for subgroup analyses.

The study was funded by the National Institutes of Health. Dr. Packett and Dr. Blinder reported no relevant financial relationships.

A version of this article originally appeared on Medscape.com.