Is pro soccer a risk factor for ALS?

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Mon, 04/29/2019 - 09:40

 

Professional soccer players may be at increased risk of amyotrophic lateral sclerosis (ALS), according to Italian researchers who reviewed trading cards of about 25,000 male professional soccer players who played in Italy. The researchers then scanned news reports to find which of those players developed the rare neurologic disease. Players who developed ALS were a much younger age at diagnosis when compared with the general population, according to the researchers, who will present their findings at the annual meeting of the American Academy of Neurology.

While the findings might implicate professional-level soccer in the development of ALS, there could be other factors at work, said lead author Ettore Beghi, MD, of the Mario Negri Institute for Pharmacological Research, Milan. “Repeated traumatic events, heavy physical exercise, and substance use could also be factors in the increased ALS risk among soccer players,” Dr. Beghi said in a news release. “In addition, genetics may play a role.”

The ALS-related deaths of several Italian pro soccer players sparked suggestions that the disease and the sport could be somehow linked, according to Dr. Beghi and colleagues. To determine whether professional soccer players are at increased ALS risk, they reviewed the archives of the country’s major soccer card publisher from the years 1959 to 2000, recording the name, date, and place of birth; field position; and team history for the tens of thousands of players they identified.

News reports revealed that 33 players in that cohort developed ALS, compared with 17.6 cases that would be expected based on Italian general population estimates, according to Dr. Beghi and colleagues.

The number of cases per 100,000 person-years was 1.9 for all the soccer players, and 4.7 for those who were younger than 45 years at diagnosis, researchers said. In general, soccer players were younger at diagnosis, with a median age of ALS onset of 43.3 years, versus 62.5 years in the general population, they added.

These findings cannot be applied to those who play soccer below the professional level, since only professional athletes were studied, Dr. Beghi said. Moreover, the results should not be construed to suggest that people avoid playing soccer, he said, adding that the researchers had few specific details on the players’ ALS diagnoses.

Patients with ALS more often report head injuries, compared with the general population, while links between exercise and ALS have been found in some studies, but not others, according to the researchers.

“Clinical and experimental observations suggest an association between ALS and use of nonsteroidal anti-inflammatory agents and dietary supplements, including branched chain amino acids,” researchers added in the abstract for their report.

The study by Dr. Beghi and colleagues was supported by the Mario Negri Institute in Milan.

Source: Beghi E et al. AAN 2019, Abstract S1.001.

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Professional soccer players may be at increased risk of amyotrophic lateral sclerosis (ALS), according to Italian researchers who reviewed trading cards of about 25,000 male professional soccer players who played in Italy. The researchers then scanned news reports to find which of those players developed the rare neurologic disease. Players who developed ALS were a much younger age at diagnosis when compared with the general population, according to the researchers, who will present their findings at the annual meeting of the American Academy of Neurology.

While the findings might implicate professional-level soccer in the development of ALS, there could be other factors at work, said lead author Ettore Beghi, MD, of the Mario Negri Institute for Pharmacological Research, Milan. “Repeated traumatic events, heavy physical exercise, and substance use could also be factors in the increased ALS risk among soccer players,” Dr. Beghi said in a news release. “In addition, genetics may play a role.”

The ALS-related deaths of several Italian pro soccer players sparked suggestions that the disease and the sport could be somehow linked, according to Dr. Beghi and colleagues. To determine whether professional soccer players are at increased ALS risk, they reviewed the archives of the country’s major soccer card publisher from the years 1959 to 2000, recording the name, date, and place of birth; field position; and team history for the tens of thousands of players they identified.

News reports revealed that 33 players in that cohort developed ALS, compared with 17.6 cases that would be expected based on Italian general population estimates, according to Dr. Beghi and colleagues.

The number of cases per 100,000 person-years was 1.9 for all the soccer players, and 4.7 for those who were younger than 45 years at diagnosis, researchers said. In general, soccer players were younger at diagnosis, with a median age of ALS onset of 43.3 years, versus 62.5 years in the general population, they added.

These findings cannot be applied to those who play soccer below the professional level, since only professional athletes were studied, Dr. Beghi said. Moreover, the results should not be construed to suggest that people avoid playing soccer, he said, adding that the researchers had few specific details on the players’ ALS diagnoses.

Patients with ALS more often report head injuries, compared with the general population, while links between exercise and ALS have been found in some studies, but not others, according to the researchers.

“Clinical and experimental observations suggest an association between ALS and use of nonsteroidal anti-inflammatory agents and dietary supplements, including branched chain amino acids,” researchers added in the abstract for their report.

The study by Dr. Beghi and colleagues was supported by the Mario Negri Institute in Milan.

Source: Beghi E et al. AAN 2019, Abstract S1.001.

 

Professional soccer players may be at increased risk of amyotrophic lateral sclerosis (ALS), according to Italian researchers who reviewed trading cards of about 25,000 male professional soccer players who played in Italy. The researchers then scanned news reports to find which of those players developed the rare neurologic disease. Players who developed ALS were a much younger age at diagnosis when compared with the general population, according to the researchers, who will present their findings at the annual meeting of the American Academy of Neurology.

While the findings might implicate professional-level soccer in the development of ALS, there could be other factors at work, said lead author Ettore Beghi, MD, of the Mario Negri Institute for Pharmacological Research, Milan. “Repeated traumatic events, heavy physical exercise, and substance use could also be factors in the increased ALS risk among soccer players,” Dr. Beghi said in a news release. “In addition, genetics may play a role.”

The ALS-related deaths of several Italian pro soccer players sparked suggestions that the disease and the sport could be somehow linked, according to Dr. Beghi and colleagues. To determine whether professional soccer players are at increased ALS risk, they reviewed the archives of the country’s major soccer card publisher from the years 1959 to 2000, recording the name, date, and place of birth; field position; and team history for the tens of thousands of players they identified.

News reports revealed that 33 players in that cohort developed ALS, compared with 17.6 cases that would be expected based on Italian general population estimates, according to Dr. Beghi and colleagues.

The number of cases per 100,000 person-years was 1.9 for all the soccer players, and 4.7 for those who were younger than 45 years at diagnosis, researchers said. In general, soccer players were younger at diagnosis, with a median age of ALS onset of 43.3 years, versus 62.5 years in the general population, they added.

These findings cannot be applied to those who play soccer below the professional level, since only professional athletes were studied, Dr. Beghi said. Moreover, the results should not be construed to suggest that people avoid playing soccer, he said, adding that the researchers had few specific details on the players’ ALS diagnoses.

Patients with ALS more often report head injuries, compared with the general population, while links between exercise and ALS have been found in some studies, but not others, according to the researchers.

“Clinical and experimental observations suggest an association between ALS and use of nonsteroidal anti-inflammatory agents and dietary supplements, including branched chain amino acids,” researchers added in the abstract for their report.

The study by Dr. Beghi and colleagues was supported by the Mario Negri Institute in Milan.

Source: Beghi E et al. AAN 2019, Abstract S1.001.

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Idelalisib shows long-term safety, efficacy for relapsed CLL

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Fri, 12/16/2022 - 11:33

 

For patients with relapsed/refractory chronic lymphocytic leukemia (CLL), long-term treatment with the phosphoinositol 3-kinase inhibitor idelalisib appears safe and effective, according to investigators.

Final results from a phase 3 trial confirmed survival advantages when idelalisib is used in combination with rituximab, reported lead author Jeff P. Sharman, MD, of Willamette Valley Cancer Institute and Research Center in Springfield, Ore., and colleagues.

During follow-up, which exceeded 5 years in some patients, no new idelalisib-related adverse events were encountered, supporting the safety of long-term use, the investigators noted. The report is in the Journal of Clinical Oncology.

This study was “pivotal” for treating elderly patients with relapsed CLL, the investigators wrote, as these patients previously had few treatment options beyond supportive or palliative care.

Earlier results from the study showed that adding idelalisib to rituximab raised overall response rates from about 15.5% to 83.6% and median progression-free survival from 6.5 months to 19.4 months, resulting in “significantly better clinical outcomes compared with those seen with rituximab alone,” leading to approval by the Food and Drug Administration.

During the primary study, 110 patients received a combination of idelalisib and rituximab, while 108 patients received rituximab and placebo. The median patient age was 71 years, with a median of three lines of prior therapy. The present analysis focused on the 110 patients in the combination group who received at least one dose of idelalisib, whether or not they elected to participate in the extension phase.

After a median follow-up of 18 months, ranging from 0.3 months to 67.6 months, the overall response rate was 85.5% and the median progression-free survival was 20.3 months, both of which are similar to earlier findings. Median overall survival was 40.6 months.

With a median duration of exposure of 16.2 months, the safety analysis revealed no new idelalisib-related adverse events.

However, the investigators pointed out that prolonged therapy often led to diarrhea, which ultimately occurred in about half of patients (46.4%). Roughly equal amounts of patients experienced grade 2 (17.3%) or grade 3 or greater diarrhea (16.4%). In cases of grade 3 or greater diarrhea, steroid therapy was recommended, typically resulting in symptom resolution within 2 weeks; however, “there were insufficient numbers of patients to determine if steroid therapy affected the duration of symptoms,” the investigators wrote.

“The longer-term data presented here confirm the previously reported efficacy of targeting PI3K with idelalisib in patients with relapsed/refractory CLL and support the use of [idelalisib and rituximab] in this patient population with careful management of potential [adverse events],” they wrote.

Gilead Sciences funded the study. Dr. Sharman reported financial relationships with Gilead and other companies.

SOURCE: Sharman JP et al. J Clin Oncol. 2019 Apr 17. doi: 10.1200/JCO.18.01460.

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For patients with relapsed/refractory chronic lymphocytic leukemia (CLL), long-term treatment with the phosphoinositol 3-kinase inhibitor idelalisib appears safe and effective, according to investigators.

Final results from a phase 3 trial confirmed survival advantages when idelalisib is used in combination with rituximab, reported lead author Jeff P. Sharman, MD, of Willamette Valley Cancer Institute and Research Center in Springfield, Ore., and colleagues.

During follow-up, which exceeded 5 years in some patients, no new idelalisib-related adverse events were encountered, supporting the safety of long-term use, the investigators noted. The report is in the Journal of Clinical Oncology.

This study was “pivotal” for treating elderly patients with relapsed CLL, the investigators wrote, as these patients previously had few treatment options beyond supportive or palliative care.

Earlier results from the study showed that adding idelalisib to rituximab raised overall response rates from about 15.5% to 83.6% and median progression-free survival from 6.5 months to 19.4 months, resulting in “significantly better clinical outcomes compared with those seen with rituximab alone,” leading to approval by the Food and Drug Administration.

During the primary study, 110 patients received a combination of idelalisib and rituximab, while 108 patients received rituximab and placebo. The median patient age was 71 years, with a median of three lines of prior therapy. The present analysis focused on the 110 patients in the combination group who received at least one dose of idelalisib, whether or not they elected to participate in the extension phase.

After a median follow-up of 18 months, ranging from 0.3 months to 67.6 months, the overall response rate was 85.5% and the median progression-free survival was 20.3 months, both of which are similar to earlier findings. Median overall survival was 40.6 months.

With a median duration of exposure of 16.2 months, the safety analysis revealed no new idelalisib-related adverse events.

However, the investigators pointed out that prolonged therapy often led to diarrhea, which ultimately occurred in about half of patients (46.4%). Roughly equal amounts of patients experienced grade 2 (17.3%) or grade 3 or greater diarrhea (16.4%). In cases of grade 3 or greater diarrhea, steroid therapy was recommended, typically resulting in symptom resolution within 2 weeks; however, “there were insufficient numbers of patients to determine if steroid therapy affected the duration of symptoms,” the investigators wrote.

“The longer-term data presented here confirm the previously reported efficacy of targeting PI3K with idelalisib in patients with relapsed/refractory CLL and support the use of [idelalisib and rituximab] in this patient population with careful management of potential [adverse events],” they wrote.

Gilead Sciences funded the study. Dr. Sharman reported financial relationships with Gilead and other companies.

SOURCE: Sharman JP et al. J Clin Oncol. 2019 Apr 17. doi: 10.1200/JCO.18.01460.

 

For patients with relapsed/refractory chronic lymphocytic leukemia (CLL), long-term treatment with the phosphoinositol 3-kinase inhibitor idelalisib appears safe and effective, according to investigators.

Final results from a phase 3 trial confirmed survival advantages when idelalisib is used in combination with rituximab, reported lead author Jeff P. Sharman, MD, of Willamette Valley Cancer Institute and Research Center in Springfield, Ore., and colleagues.

During follow-up, which exceeded 5 years in some patients, no new idelalisib-related adverse events were encountered, supporting the safety of long-term use, the investigators noted. The report is in the Journal of Clinical Oncology.

This study was “pivotal” for treating elderly patients with relapsed CLL, the investigators wrote, as these patients previously had few treatment options beyond supportive or palliative care.

Earlier results from the study showed that adding idelalisib to rituximab raised overall response rates from about 15.5% to 83.6% and median progression-free survival from 6.5 months to 19.4 months, resulting in “significantly better clinical outcomes compared with those seen with rituximab alone,” leading to approval by the Food and Drug Administration.

During the primary study, 110 patients received a combination of idelalisib and rituximab, while 108 patients received rituximab and placebo. The median patient age was 71 years, with a median of three lines of prior therapy. The present analysis focused on the 110 patients in the combination group who received at least one dose of idelalisib, whether or not they elected to participate in the extension phase.

After a median follow-up of 18 months, ranging from 0.3 months to 67.6 months, the overall response rate was 85.5% and the median progression-free survival was 20.3 months, both of which are similar to earlier findings. Median overall survival was 40.6 months.

With a median duration of exposure of 16.2 months, the safety analysis revealed no new idelalisib-related adverse events.

However, the investigators pointed out that prolonged therapy often led to diarrhea, which ultimately occurred in about half of patients (46.4%). Roughly equal amounts of patients experienced grade 2 (17.3%) or grade 3 or greater diarrhea (16.4%). In cases of grade 3 or greater diarrhea, steroid therapy was recommended, typically resulting in symptom resolution within 2 weeks; however, “there were insufficient numbers of patients to determine if steroid therapy affected the duration of symptoms,” the investigators wrote.

“The longer-term data presented here confirm the previously reported efficacy of targeting PI3K with idelalisib in patients with relapsed/refractory CLL and support the use of [idelalisib and rituximab] in this patient population with careful management of potential [adverse events],” they wrote.

Gilead Sciences funded the study. Dr. Sharman reported financial relationships with Gilead and other companies.

SOURCE: Sharman JP et al. J Clin Oncol. 2019 Apr 17. doi: 10.1200/JCO.18.01460.

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Use of levoketoconazole improved several clinical features of Cushing’s disease

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Fri, 04/26/2019 - 08:18

Following 6 months of treatment with the investigational agent levoketoconazole, several clinical signs and symptoms of Cushing’s disease improved, including acne, hirsutism, and peripheral edema, as did patient-reported quality of life and symptoms of depression.

Dr. Maria Fleseriu

The findings come from an analysis of secondary endpoints among patients enrolled in SONICS, an open-label, phase 3 study of levoketoconazole as a treatment for endogenous Cushing’s disease (CD) that enrolled 94 patients at centers in North America, Europe and the Middle East. An investigational cortisol synthesis inhibitor, levoketoconazole is being developed by Strongbridge Biopharma and is not yet approved by the Food and Drug Administration.

“Despite the availability of approved treatments, the medical needs in Cushing’s [disease] remain very high,” the study’s principal investigator, Maria Fleseriu, MD, FACE, said in an interview in advance of the annual scientific and clinical congress of the American Association of Clinical Endocrinologists, where the data were presented. “This study demonstrates that levoketoconazole has the potential to address several clinical features of Cushing’s, owing to its clinically translated novel mechanism of action to suppress both cortisol and androgen syntheses (the latter elevated in many women with CD). Interestingly, there was no evidence of clinically important free-T reduction in men, and more studies are needed to elucidate this mechanism.”

In SONICS, adults with confirmed CD and mean 24-hour urinary free-cortisol (mUFC) value at least 1.5 times the upper limit of normal were treated with levoketoconazole in three phases: 2- to 21-week dose-titration phase (150-600 mg BID, as needed, to target mUFC normalization); 6-month maintenance phase (primary endpoint); and 6-month extended evaluation phase. The end of maintenance phase findings that focused on reductions in mUFC and safety had been previously reported. The current analysis focused on secondary endpoints, including changes from baseline to end of maintenance in investigator-assessed CD clinical signs and symptoms (acne score [range: 0-44]; hirsutism score [women only; range: 0-36]; and peripheral edema score [range: 0-12]), and patient-reported outcomes of quality of life (Cushing QoL questionnaire score [range: 0-100]) and depression (Beck Depression Inventory II score [range: 0-63]). The researchers also assessed hormones including free testosterone levels, and they used paired t-tests to infer statistical significance of the mean changes from baseline to end of maintenance for all measures.

Of the 94 patients enrolled in SONICS, 77 entered the maintenance phase, said Dr. Fleseriu, professor of medicine and neurological surgery and director of the pituitary center at Oregon Health and Science University, Portland. The patients’ mean age was 44 years and mean baseline mUFC was 243.3 mcg/day; 82% of patients were female, and 96% were white. Between baseline and the end of maintenance, the researchers observed significant mean improvements in acne scores (from 2.8 to –1.8, respectively; P = .0063), hirsutism scores (women only, from 7.8 to –2.6; P = .0008), and peripheral edema scores (from 1.0 to –0.4; P = .0295). They also observed significant mean improvements in quality of life and depression scores between baseline and end of maintenance (P less than .0001 and P = .0043, respectively). Mean free-testosterone levels increased nonsignificantly between baseline and end of maintenance in men (from 5.1 to 5.8 ng/dL) yet decreased significantly in women (from 0.3 to 0.1 ng/dL; P less than 0.0001; reference). Overall, 33 patients (35%) discontinued taking levoketoconazole by the end of the maintenance phase. Twelve (13%) discontinued because of adverse events.

“I wasn’t necessarily surprised with any of the data in this poster as I had experience with the drug in clinical trials, but I was definitely pleased to see overall significant improvements in acne score, hirsutism score in women, and peripheral edema score,” Dr. Fleseriu said. “Those are benefits that could potentially increase long-term adherence to treatment and quality-of-life improvements, particularly in women. It’s also exciting to see that quality of life and depression improved in these patients as well.”

These types of patient-reported outcomes are so important to how our patients feel about their disease and should be more of a focus for us physicians; it’s important to look at efficacy, safety and patient reported outcomes when we decide for an individualized treatment for each patient,” she noted.

Dr. Fleseriu reported that she has received research funding for Oregon Health and Science University from Novartis, Millendo, and Strongbridge. She has also received scientific consulting fees from Novartis and Strongbridge.

 

 

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Following 6 months of treatment with the investigational agent levoketoconazole, several clinical signs and symptoms of Cushing’s disease improved, including acne, hirsutism, and peripheral edema, as did patient-reported quality of life and symptoms of depression.

Dr. Maria Fleseriu

The findings come from an analysis of secondary endpoints among patients enrolled in SONICS, an open-label, phase 3 study of levoketoconazole as a treatment for endogenous Cushing’s disease (CD) that enrolled 94 patients at centers in North America, Europe and the Middle East. An investigational cortisol synthesis inhibitor, levoketoconazole is being developed by Strongbridge Biopharma and is not yet approved by the Food and Drug Administration.

“Despite the availability of approved treatments, the medical needs in Cushing’s [disease] remain very high,” the study’s principal investigator, Maria Fleseriu, MD, FACE, said in an interview in advance of the annual scientific and clinical congress of the American Association of Clinical Endocrinologists, where the data were presented. “This study demonstrates that levoketoconazole has the potential to address several clinical features of Cushing’s, owing to its clinically translated novel mechanism of action to suppress both cortisol and androgen syntheses (the latter elevated in many women with CD). Interestingly, there was no evidence of clinically important free-T reduction in men, and more studies are needed to elucidate this mechanism.”

In SONICS, adults with confirmed CD and mean 24-hour urinary free-cortisol (mUFC) value at least 1.5 times the upper limit of normal were treated with levoketoconazole in three phases: 2- to 21-week dose-titration phase (150-600 mg BID, as needed, to target mUFC normalization); 6-month maintenance phase (primary endpoint); and 6-month extended evaluation phase. The end of maintenance phase findings that focused on reductions in mUFC and safety had been previously reported. The current analysis focused on secondary endpoints, including changes from baseline to end of maintenance in investigator-assessed CD clinical signs and symptoms (acne score [range: 0-44]; hirsutism score [women only; range: 0-36]; and peripheral edema score [range: 0-12]), and patient-reported outcomes of quality of life (Cushing QoL questionnaire score [range: 0-100]) and depression (Beck Depression Inventory II score [range: 0-63]). The researchers also assessed hormones including free testosterone levels, and they used paired t-tests to infer statistical significance of the mean changes from baseline to end of maintenance for all measures.

Of the 94 patients enrolled in SONICS, 77 entered the maintenance phase, said Dr. Fleseriu, professor of medicine and neurological surgery and director of the pituitary center at Oregon Health and Science University, Portland. The patients’ mean age was 44 years and mean baseline mUFC was 243.3 mcg/day; 82% of patients were female, and 96% were white. Between baseline and the end of maintenance, the researchers observed significant mean improvements in acne scores (from 2.8 to –1.8, respectively; P = .0063), hirsutism scores (women only, from 7.8 to –2.6; P = .0008), and peripheral edema scores (from 1.0 to –0.4; P = .0295). They also observed significant mean improvements in quality of life and depression scores between baseline and end of maintenance (P less than .0001 and P = .0043, respectively). Mean free-testosterone levels increased nonsignificantly between baseline and end of maintenance in men (from 5.1 to 5.8 ng/dL) yet decreased significantly in women (from 0.3 to 0.1 ng/dL; P less than 0.0001; reference). Overall, 33 patients (35%) discontinued taking levoketoconazole by the end of the maintenance phase. Twelve (13%) discontinued because of adverse events.

“I wasn’t necessarily surprised with any of the data in this poster as I had experience with the drug in clinical trials, but I was definitely pleased to see overall significant improvements in acne score, hirsutism score in women, and peripheral edema score,” Dr. Fleseriu said. “Those are benefits that could potentially increase long-term adherence to treatment and quality-of-life improvements, particularly in women. It’s also exciting to see that quality of life and depression improved in these patients as well.”

These types of patient-reported outcomes are so important to how our patients feel about their disease and should be more of a focus for us physicians; it’s important to look at efficacy, safety and patient reported outcomes when we decide for an individualized treatment for each patient,” she noted.

Dr. Fleseriu reported that she has received research funding for Oregon Health and Science University from Novartis, Millendo, and Strongbridge. She has also received scientific consulting fees from Novartis and Strongbridge.

 

 

Following 6 months of treatment with the investigational agent levoketoconazole, several clinical signs and symptoms of Cushing’s disease improved, including acne, hirsutism, and peripheral edema, as did patient-reported quality of life and symptoms of depression.

Dr. Maria Fleseriu

The findings come from an analysis of secondary endpoints among patients enrolled in SONICS, an open-label, phase 3 study of levoketoconazole as a treatment for endogenous Cushing’s disease (CD) that enrolled 94 patients at centers in North America, Europe and the Middle East. An investigational cortisol synthesis inhibitor, levoketoconazole is being developed by Strongbridge Biopharma and is not yet approved by the Food and Drug Administration.

“Despite the availability of approved treatments, the medical needs in Cushing’s [disease] remain very high,” the study’s principal investigator, Maria Fleseriu, MD, FACE, said in an interview in advance of the annual scientific and clinical congress of the American Association of Clinical Endocrinologists, where the data were presented. “This study demonstrates that levoketoconazole has the potential to address several clinical features of Cushing’s, owing to its clinically translated novel mechanism of action to suppress both cortisol and androgen syntheses (the latter elevated in many women with CD). Interestingly, there was no evidence of clinically important free-T reduction in men, and more studies are needed to elucidate this mechanism.”

In SONICS, adults with confirmed CD and mean 24-hour urinary free-cortisol (mUFC) value at least 1.5 times the upper limit of normal were treated with levoketoconazole in three phases: 2- to 21-week dose-titration phase (150-600 mg BID, as needed, to target mUFC normalization); 6-month maintenance phase (primary endpoint); and 6-month extended evaluation phase. The end of maintenance phase findings that focused on reductions in mUFC and safety had been previously reported. The current analysis focused on secondary endpoints, including changes from baseline to end of maintenance in investigator-assessed CD clinical signs and symptoms (acne score [range: 0-44]; hirsutism score [women only; range: 0-36]; and peripheral edema score [range: 0-12]), and patient-reported outcomes of quality of life (Cushing QoL questionnaire score [range: 0-100]) and depression (Beck Depression Inventory II score [range: 0-63]). The researchers also assessed hormones including free testosterone levels, and they used paired t-tests to infer statistical significance of the mean changes from baseline to end of maintenance for all measures.

Of the 94 patients enrolled in SONICS, 77 entered the maintenance phase, said Dr. Fleseriu, professor of medicine and neurological surgery and director of the pituitary center at Oregon Health and Science University, Portland. The patients’ mean age was 44 years and mean baseline mUFC was 243.3 mcg/day; 82% of patients were female, and 96% were white. Between baseline and the end of maintenance, the researchers observed significant mean improvements in acne scores (from 2.8 to –1.8, respectively; P = .0063), hirsutism scores (women only, from 7.8 to –2.6; P = .0008), and peripheral edema scores (from 1.0 to –0.4; P = .0295). They also observed significant mean improvements in quality of life and depression scores between baseline and end of maintenance (P less than .0001 and P = .0043, respectively). Mean free-testosterone levels increased nonsignificantly between baseline and end of maintenance in men (from 5.1 to 5.8 ng/dL) yet decreased significantly in women (from 0.3 to 0.1 ng/dL; P less than 0.0001; reference). Overall, 33 patients (35%) discontinued taking levoketoconazole by the end of the maintenance phase. Twelve (13%) discontinued because of adverse events.

“I wasn’t necessarily surprised with any of the data in this poster as I had experience with the drug in clinical trials, but I was definitely pleased to see overall significant improvements in acne score, hirsutism score in women, and peripheral edema score,” Dr. Fleseriu said. “Those are benefits that could potentially increase long-term adherence to treatment and quality-of-life improvements, particularly in women. It’s also exciting to see that quality of life and depression improved in these patients as well.”

These types of patient-reported outcomes are so important to how our patients feel about their disease and should be more of a focus for us physicians; it’s important to look at efficacy, safety and patient reported outcomes when we decide for an individualized treatment for each patient,” she noted.

Dr. Fleseriu reported that she has received research funding for Oregon Health and Science University from Novartis, Millendo, and Strongbridge. She has also received scientific consulting fees from Novartis and Strongbridge.

 

 

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Key clinical point: Several clinical features of Cushing’s disease improved following 6 months of treatment with the investigational agent levoketoconazole.

Major finding: Between baseline and the end of maintenance, the researchers observed significant mean improvements in acne scores (from 2.8 to –1.8, respectively; P = .0063), hirsutism scores (women only, from 7.8 to –2.6; P = .0008), and peripheral edema scores (from 1.0 to –0.4; P = .0295).

Study details: An analysis of secondary endpoints among 77 patients enrolled in SONICS.

Disclosures: Dr. Fleseriu reported that she has received research funding for Oregon Health and Science University from Novartis, Millendo, and Strongbridge. She has also received scientific consulting fees from Novartis and Strongbridge.

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Three-drug regimen shows promise for refractory primary biliary cholangitis

Triple therapy already gets used
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Tue, 07/21/2020 - 14:18

 

Patients with persistent liver abnormalities from primary biliary cholangitis despite combined treatment with ursodeoxycholic acid and obeticholic acid often responded to additional treatment with bezafibrate in a single-center study of 10 patients treated for 6 months.

Mitchel L. Zoler/MDedge News
Lena Smets

In addition to producing drops in levels of alkaline phosphatase and bilirubin, key surrogate markers for ultimate clinical benefit, the addition of bezafibrate also led to reduced pruritis among five of eight patients who had this symptom when they started on bezafibrate, Lena Smets said at the meeting, sponsored by the European Association for the Study of the Liver. Pruritis is a bothersome adverse effect from obeticholic acid (OCA) treatment that also occurs in patients with untreated primary biliary cholangitis (PBC), so the drop in pruritis in patients who started bezafibrate was notable. Overall, the triple regimen of ursodeoxycholic acid (UDCA), OCA, and bezafibrate was “well tolerated,” said Ms. Smets, a researcher at KU Leuven, Belgium.

Bezafibrate is available in Europe as a lipid-lowering treatment, especially for lowering triglycerides, so there might be a temptation to use it off label in routine practice as an add-on to UDCA and OCA in PBC patients who are not fully responsive to this dual therapy, Ms. Smets acknowledged. But she stressed that what’s needed now is a multicenter, randomized trial of bezafibrate as part of triple-therapy regimen with many more than the 10 patients included in her review.

Both UDCA and OCA have Food and Drug Administration approval for U.S. treatment of PBC. Bezafibrate is not approved for U.S. marketing, but the related agent fenofibrate has FDA approval and has shown preliminary evidence of acting like bezafibrate in PBC patients in small pilot studies or case reports, showing that “growing evidence supports the use of fibrates, but their safety has not been firmly established, and caution should be used,” according to a recent review by clinicians from the University of California, Davis (Gastroenterol Hepatol [NY]. 2018 March;14[3]:154-63).

The series of 10 PBC patients who received triple therapy at KU Leuven began as part of a cohort of 16 PBC patients treated at that center with UDCA monotherapy for an average of 6 years before entering the POISE (Phase 3 Study of Obeticholic Acid in Patients With Primary Biliary Cirrhosis) phase 3 trial that ran at KU Leuven and 57 other sites in 13 countries. POISE randomized 216 PBC patients with persistently elevated alkaline phosphatase and bilirubin levels despite UDCA treatment to added treatment with OCA. The results showed incremental benefit to these patients from a tolerable OCA acid regimen (N Engl J Med. 2016 Aug 18;375[7]631-43). The findings helped OCA (Ocaliva) get FDA marketing approval in 2016 for treatment of PBC when added to UDCA in patients not fully responsive to UDCA monotherapy.



The case for bezafibrate as an add-on to UDCA for refractory PBC patients was documented by a 2018 report from the BEZURSO (Phase 3 Study of Bezafibrate in Combination With Ursodeoxycholic Acid in Primary Biliary Cirrhosis) trial. Run at multiple centers in France, the trial randomized 100 patients on UDCA treatment to added bezafibrate or placebo, and showed that bezafibrate produced significant incremental decreases in and normalizations of alkaline phosphatase and bilirubin levels. It also had the expected effect of increasing serum creatinine level by an average of 5% (N Engl J Med. 2018 June 7;378[23]:2171-81).

Among the 16 participants in the POISE trial at KU Leuven, 13 completed that trial and then agreed to start on a triple regimen with bezafibrate added because of persistent elevations in alkaline phosphatase, and 10 patients completed 6 months on triple treatment. After 6 months, alkaline phosphatase levels reached the normal range in 5 of these 10 patients, Ms. Smets reported. Bilirubin levels also decreased in each of the 10 patients, although bilirubin had already been at a normal level in 9 of the 10 patients at the start of bezafibrate treatment, and this rate remained at 9 of 10 after 6 months. Eight of the 10 had pruritis when they started bezafibrate, and five of these eight reported decreased symptoms on treatment. Patients also showed no biochemical evidence of hepatotoxicity on the triple regimen, Ms. Smets said.

Guidelines published in 2017 from the European Association for the Study of the Liver cited evidence from small studies showing possible efficacy of fibrates as an add-on for PBC patients refractory to UDCA monotherapy, but stopped short of any endorsement of their use (J Hepatol. 2017 July;67[1]:145-72). However, guidelines from the American Association for the Study of Liver Diseases, released several months later and after publication of the BEZURSO results, said that “fibrates can be considered as off-label alternatives for patients with PBC and inadequate response to UDCA,” but also warned that “use of OCA and fibrates is discouraged in patients with decompensated liver disease (Child Pugh–Turcotte B or C)” (Hepatology. 2018 Jan;69[1]:394-419).

SOURCE: Smets L et al. J Hepatol. 2019 April;70[1]:e130.

Body

 

Clinicians in Europe already use this triple therapy in appropriate patients. Bezafibrate is cheap, it has been used since the 1970s to lower triglyceride levels, and it is generally safe. Following the report of results from the BEZURSO trial in 2018, guidelines changed to accept the option of adding a fibrate to ursodeoxycholic acid and obeticholic acid.

Mitchel L. Zoler/MDedge News
Dr. Thomas Berg
In my own practice I follow the steps used by the KU Leuven group, going from monotherapy with ursodeoxycholic acid to combination treatment with obeticholic acid, and then we routinely add bezafibrate when patients don’t have a full response to the dual regimen, or if they have ongoing complaints of pruritis. I will sometimes start a fibrate even in patients with a complete biochemical response to dual therapy if pruritis remains a problem. Not all patients have relief of their itching when a fibrate is added, but many do.
 

Thomas Berg, MD, is professor and head of hepatology at University Hospital in Leipzig, Germany. He has received personal fees and research support from several companies including Intercept, the company that markets obeticholic acid (Ocaliva). He made these comments in an interview.

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Clinicians in Europe already use this triple therapy in appropriate patients. Bezafibrate is cheap, it has been used since the 1970s to lower triglyceride levels, and it is generally safe. Following the report of results from the BEZURSO trial in 2018, guidelines changed to accept the option of adding a fibrate to ursodeoxycholic acid and obeticholic acid.

Mitchel L. Zoler/MDedge News
Dr. Thomas Berg
In my own practice I follow the steps used by the KU Leuven group, going from monotherapy with ursodeoxycholic acid to combination treatment with obeticholic acid, and then we routinely add bezafibrate when patients don’t have a full response to the dual regimen, or if they have ongoing complaints of pruritis. I will sometimes start a fibrate even in patients with a complete biochemical response to dual therapy if pruritis remains a problem. Not all patients have relief of their itching when a fibrate is added, but many do.
 

Thomas Berg, MD, is professor and head of hepatology at University Hospital in Leipzig, Germany. He has received personal fees and research support from several companies including Intercept, the company that markets obeticholic acid (Ocaliva). He made these comments in an interview.

Body

 

Clinicians in Europe already use this triple therapy in appropriate patients. Bezafibrate is cheap, it has been used since the 1970s to lower triglyceride levels, and it is generally safe. Following the report of results from the BEZURSO trial in 2018, guidelines changed to accept the option of adding a fibrate to ursodeoxycholic acid and obeticholic acid.

Mitchel L. Zoler/MDedge News
Dr. Thomas Berg
In my own practice I follow the steps used by the KU Leuven group, going from monotherapy with ursodeoxycholic acid to combination treatment with obeticholic acid, and then we routinely add bezafibrate when patients don’t have a full response to the dual regimen, or if they have ongoing complaints of pruritis. I will sometimes start a fibrate even in patients with a complete biochemical response to dual therapy if pruritis remains a problem. Not all patients have relief of their itching when a fibrate is added, but many do.
 

Thomas Berg, MD, is professor and head of hepatology at University Hospital in Leipzig, Germany. He has received personal fees and research support from several companies including Intercept, the company that markets obeticholic acid (Ocaliva). He made these comments in an interview.

Title
Triple therapy already gets used
Triple therapy already gets used

 

Patients with persistent liver abnormalities from primary biliary cholangitis despite combined treatment with ursodeoxycholic acid and obeticholic acid often responded to additional treatment with bezafibrate in a single-center study of 10 patients treated for 6 months.

Mitchel L. Zoler/MDedge News
Lena Smets

In addition to producing drops in levels of alkaline phosphatase and bilirubin, key surrogate markers for ultimate clinical benefit, the addition of bezafibrate also led to reduced pruritis among five of eight patients who had this symptom when they started on bezafibrate, Lena Smets said at the meeting, sponsored by the European Association for the Study of the Liver. Pruritis is a bothersome adverse effect from obeticholic acid (OCA) treatment that also occurs in patients with untreated primary biliary cholangitis (PBC), so the drop in pruritis in patients who started bezafibrate was notable. Overall, the triple regimen of ursodeoxycholic acid (UDCA), OCA, and bezafibrate was “well tolerated,” said Ms. Smets, a researcher at KU Leuven, Belgium.

Bezafibrate is available in Europe as a lipid-lowering treatment, especially for lowering triglycerides, so there might be a temptation to use it off label in routine practice as an add-on to UDCA and OCA in PBC patients who are not fully responsive to this dual therapy, Ms. Smets acknowledged. But she stressed that what’s needed now is a multicenter, randomized trial of bezafibrate as part of triple-therapy regimen with many more than the 10 patients included in her review.

Both UDCA and OCA have Food and Drug Administration approval for U.S. treatment of PBC. Bezafibrate is not approved for U.S. marketing, but the related agent fenofibrate has FDA approval and has shown preliminary evidence of acting like bezafibrate in PBC patients in small pilot studies or case reports, showing that “growing evidence supports the use of fibrates, but their safety has not been firmly established, and caution should be used,” according to a recent review by clinicians from the University of California, Davis (Gastroenterol Hepatol [NY]. 2018 March;14[3]:154-63).

The series of 10 PBC patients who received triple therapy at KU Leuven began as part of a cohort of 16 PBC patients treated at that center with UDCA monotherapy for an average of 6 years before entering the POISE (Phase 3 Study of Obeticholic Acid in Patients With Primary Biliary Cirrhosis) phase 3 trial that ran at KU Leuven and 57 other sites in 13 countries. POISE randomized 216 PBC patients with persistently elevated alkaline phosphatase and bilirubin levels despite UDCA treatment to added treatment with OCA. The results showed incremental benefit to these patients from a tolerable OCA acid regimen (N Engl J Med. 2016 Aug 18;375[7]631-43). The findings helped OCA (Ocaliva) get FDA marketing approval in 2016 for treatment of PBC when added to UDCA in patients not fully responsive to UDCA monotherapy.



The case for bezafibrate as an add-on to UDCA for refractory PBC patients was documented by a 2018 report from the BEZURSO (Phase 3 Study of Bezafibrate in Combination With Ursodeoxycholic Acid in Primary Biliary Cirrhosis) trial. Run at multiple centers in France, the trial randomized 100 patients on UDCA treatment to added bezafibrate or placebo, and showed that bezafibrate produced significant incremental decreases in and normalizations of alkaline phosphatase and bilirubin levels. It also had the expected effect of increasing serum creatinine level by an average of 5% (N Engl J Med. 2018 June 7;378[23]:2171-81).

Among the 16 participants in the POISE trial at KU Leuven, 13 completed that trial and then agreed to start on a triple regimen with bezafibrate added because of persistent elevations in alkaline phosphatase, and 10 patients completed 6 months on triple treatment. After 6 months, alkaline phosphatase levels reached the normal range in 5 of these 10 patients, Ms. Smets reported. Bilirubin levels also decreased in each of the 10 patients, although bilirubin had already been at a normal level in 9 of the 10 patients at the start of bezafibrate treatment, and this rate remained at 9 of 10 after 6 months. Eight of the 10 had pruritis when they started bezafibrate, and five of these eight reported decreased symptoms on treatment. Patients also showed no biochemical evidence of hepatotoxicity on the triple regimen, Ms. Smets said.

Guidelines published in 2017 from the European Association for the Study of the Liver cited evidence from small studies showing possible efficacy of fibrates as an add-on for PBC patients refractory to UDCA monotherapy, but stopped short of any endorsement of their use (J Hepatol. 2017 July;67[1]:145-72). However, guidelines from the American Association for the Study of Liver Diseases, released several months later and after publication of the BEZURSO results, said that “fibrates can be considered as off-label alternatives for patients with PBC and inadequate response to UDCA,” but also warned that “use of OCA and fibrates is discouraged in patients with decompensated liver disease (Child Pugh–Turcotte B or C)” (Hepatology. 2018 Jan;69[1]:394-419).

SOURCE: Smets L et al. J Hepatol. 2019 April;70[1]:e130.

 

Patients with persistent liver abnormalities from primary biliary cholangitis despite combined treatment with ursodeoxycholic acid and obeticholic acid often responded to additional treatment with bezafibrate in a single-center study of 10 patients treated for 6 months.

Mitchel L. Zoler/MDedge News
Lena Smets

In addition to producing drops in levels of alkaline phosphatase and bilirubin, key surrogate markers for ultimate clinical benefit, the addition of bezafibrate also led to reduced pruritis among five of eight patients who had this symptom when they started on bezafibrate, Lena Smets said at the meeting, sponsored by the European Association for the Study of the Liver. Pruritis is a bothersome adverse effect from obeticholic acid (OCA) treatment that also occurs in patients with untreated primary biliary cholangitis (PBC), so the drop in pruritis in patients who started bezafibrate was notable. Overall, the triple regimen of ursodeoxycholic acid (UDCA), OCA, and bezafibrate was “well tolerated,” said Ms. Smets, a researcher at KU Leuven, Belgium.

Bezafibrate is available in Europe as a lipid-lowering treatment, especially for lowering triglycerides, so there might be a temptation to use it off label in routine practice as an add-on to UDCA and OCA in PBC patients who are not fully responsive to this dual therapy, Ms. Smets acknowledged. But she stressed that what’s needed now is a multicenter, randomized trial of bezafibrate as part of triple-therapy regimen with many more than the 10 patients included in her review.

Both UDCA and OCA have Food and Drug Administration approval for U.S. treatment of PBC. Bezafibrate is not approved for U.S. marketing, but the related agent fenofibrate has FDA approval and has shown preliminary evidence of acting like bezafibrate in PBC patients in small pilot studies or case reports, showing that “growing evidence supports the use of fibrates, but their safety has not been firmly established, and caution should be used,” according to a recent review by clinicians from the University of California, Davis (Gastroenterol Hepatol [NY]. 2018 March;14[3]:154-63).

The series of 10 PBC patients who received triple therapy at KU Leuven began as part of a cohort of 16 PBC patients treated at that center with UDCA monotherapy for an average of 6 years before entering the POISE (Phase 3 Study of Obeticholic Acid in Patients With Primary Biliary Cirrhosis) phase 3 trial that ran at KU Leuven and 57 other sites in 13 countries. POISE randomized 216 PBC patients with persistently elevated alkaline phosphatase and bilirubin levels despite UDCA treatment to added treatment with OCA. The results showed incremental benefit to these patients from a tolerable OCA acid regimen (N Engl J Med. 2016 Aug 18;375[7]631-43). The findings helped OCA (Ocaliva) get FDA marketing approval in 2016 for treatment of PBC when added to UDCA in patients not fully responsive to UDCA monotherapy.



The case for bezafibrate as an add-on to UDCA for refractory PBC patients was documented by a 2018 report from the BEZURSO (Phase 3 Study of Bezafibrate in Combination With Ursodeoxycholic Acid in Primary Biliary Cirrhosis) trial. Run at multiple centers in France, the trial randomized 100 patients on UDCA treatment to added bezafibrate or placebo, and showed that bezafibrate produced significant incremental decreases in and normalizations of alkaline phosphatase and bilirubin levels. It also had the expected effect of increasing serum creatinine level by an average of 5% (N Engl J Med. 2018 June 7;378[23]:2171-81).

Among the 16 participants in the POISE trial at KU Leuven, 13 completed that trial and then agreed to start on a triple regimen with bezafibrate added because of persistent elevations in alkaline phosphatase, and 10 patients completed 6 months on triple treatment. After 6 months, alkaline phosphatase levels reached the normal range in 5 of these 10 patients, Ms. Smets reported. Bilirubin levels also decreased in each of the 10 patients, although bilirubin had already been at a normal level in 9 of the 10 patients at the start of bezafibrate treatment, and this rate remained at 9 of 10 after 6 months. Eight of the 10 had pruritis when they started bezafibrate, and five of these eight reported decreased symptoms on treatment. Patients also showed no biochemical evidence of hepatotoxicity on the triple regimen, Ms. Smets said.

Guidelines published in 2017 from the European Association for the Study of the Liver cited evidence from small studies showing possible efficacy of fibrates as an add-on for PBC patients refractory to UDCA monotherapy, but stopped short of any endorsement of their use (J Hepatol. 2017 July;67[1]:145-72). However, guidelines from the American Association for the Study of Liver Diseases, released several months later and after publication of the BEZURSO results, said that “fibrates can be considered as off-label alternatives for patients with PBC and inadequate response to UDCA,” but also warned that “use of OCA and fibrates is discouraged in patients with decompensated liver disease (Child Pugh–Turcotte B or C)” (Hepatology. 2018 Jan;69[1]:394-419).

SOURCE: Smets L et al. J Hepatol. 2019 April;70[1]:e130.

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TTP death linked to elevated troponin and neurological signs

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Neurological abnormalities and elevated troponin predict mortality in patients with thrombotic thrombocytopenic purpura (TTP), according to retrospective analysis of 475 patients from the United Kingdom TTP registry.

Will Pass/MDedge News
Dr. Jin-Sup Shin

In addition, low ADAMTS13 activity (less than 10%) was present in 92% of immune-mediated of TTP upon acute presentation, reported lead author Jin-Sup Shin, MD, of University College London Hospital, and colleagues.

Presenting at the annual meeting of the British Society for Haematology, Dr. Shin provided some background on TTP, a condition that most clinicians encounter infrequently.

“As recently as the 1980s and 90s, when etiology was not that well understood, TTP was associated with an untreated mortality of up to 90%,” Dr. Shin said. “However, based on improved understanding of pathophysiology, and through the creation of TTP registries worldwide, there have been major advances in diagnosis, treatment, and outcomes.”

To gain insight into diagnostic and prognostic characteristics of TTP, the investigators turned to data from 602 patients with clinically suspected TTP, based on an ADAMTS13 activity level less than 10% of normal and associated clinical signs. Out of these 602 patients, 475 consented to registry participation and data analysis.

The analysis revealed a mortality rate of 4%, although Dr. Shin said that “this is probably an underestimate of the true figure,” as it excludes those who died before treatment could be initiated.

Nearly three-quarters of patients were female. The median age at presentation was 43 years, with a range of 1-93 years. The most commonly represented racial/ethnic groups were white (60%) and Afro-Caribbean (22%). Some cases were congenital (16%), but the majority were immune mediated (84%).

The immune-mediated group was the primary focus of Dr. Shin’s report. In this cohort, 76% of cases were idiopathic, while the remainder had a defined precipitant; most common were infection, autoimmune disease, pregnancy, and HIV. The relapse rate among those with immune-mediated TTP was 19%, after a median time to relapse of 26 months.

In total, 71% of patients presented with neurological abnormalities, while slightly less than half (48%) had symptomatic thrombocytopenia (bleeding/petechiae).

Diagnostic tools showed that 64% of patients had an elevated troponin level, 92% had ADAMTS13 activity less than 10%, and 25% had a platelet count lower than 10 x 109/L.

Median platelet count upon presentation was 15 x 109/L, and median lactate dehydrogenase (LDH) exceeded 1,000 units/L. After 7 days of therapy, 58% of patients were still severely deficient in ADAMTS13 activity and 36% of patients still had a platelet count lower than 150 x 109/L.

Where information was available, 30% of patients had positive auto-antibody screens, although not necessarily with signs or symptoms of autoimmune disease. A total of 93% of patients had elevated ADAMTS13 IgG antibody upon presentation. The median ADAMTS13 IgG antibody level at presentation was 37%, with a normal value being less than 6%.

Nearly half of patients with immune-mediated TTP (45%) required intensive care, and 10% of these patients were intubated and ventilated. Most patients were treated with steroids upon admission (81%). On average, 11 plasma exchanges (PEXs) were required before remission.

The investigators noted that “[t]he number of PEXs to remission appears to have decreased over the years.” As an example, a median of 14 PEXs were needed from 2009 to 2010, compared with 8 from 2017 to 2018.

Although rituximab usage in the acute setting held steady over the 10-year period, elective use increased. Out of 89 instances of subacute relapse, elective rituximab was given twice from 2009 to 2010, compared with 26 times from 2017 to 2018.

Comparing features of survival, the investigators found that the median ADAMTS13 IgG antibody level was higher among those who died. Other factors related to increased mortality risk included raised troponin (sevenfold increased risk) and neurological abnormalities, defined by reduced Glasgow Coma Scale score (sixfold increased risk).

“Our data confirm other registries worldwide; in particular, increased susceptibility in women, the Afro-Caribbean population, and those who are middle-aged,” Dr. Shin said. “Our data also show that elevated cardiac troponin and neurological involvement are indicators of poor prognosis. Also, raised antibody levels appear to be associated with a worse clinical outcome and increased mortality rate. These are clearly valuable markers in clinical practice, allowing for intensive care of high-risk patients.”

The investigators reported having no conflicts of interest.
 

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Neurological abnormalities and elevated troponin predict mortality in patients with thrombotic thrombocytopenic purpura (TTP), according to retrospective analysis of 475 patients from the United Kingdom TTP registry.

Will Pass/MDedge News
Dr. Jin-Sup Shin

In addition, low ADAMTS13 activity (less than 10%) was present in 92% of immune-mediated of TTP upon acute presentation, reported lead author Jin-Sup Shin, MD, of University College London Hospital, and colleagues.

Presenting at the annual meeting of the British Society for Haematology, Dr. Shin provided some background on TTP, a condition that most clinicians encounter infrequently.

“As recently as the 1980s and 90s, when etiology was not that well understood, TTP was associated with an untreated mortality of up to 90%,” Dr. Shin said. “However, based on improved understanding of pathophysiology, and through the creation of TTP registries worldwide, there have been major advances in diagnosis, treatment, and outcomes.”

To gain insight into diagnostic and prognostic characteristics of TTP, the investigators turned to data from 602 patients with clinically suspected TTP, based on an ADAMTS13 activity level less than 10% of normal and associated clinical signs. Out of these 602 patients, 475 consented to registry participation and data analysis.

The analysis revealed a mortality rate of 4%, although Dr. Shin said that “this is probably an underestimate of the true figure,” as it excludes those who died before treatment could be initiated.

Nearly three-quarters of patients were female. The median age at presentation was 43 years, with a range of 1-93 years. The most commonly represented racial/ethnic groups were white (60%) and Afro-Caribbean (22%). Some cases were congenital (16%), but the majority were immune mediated (84%).

The immune-mediated group was the primary focus of Dr. Shin’s report. In this cohort, 76% of cases were idiopathic, while the remainder had a defined precipitant; most common were infection, autoimmune disease, pregnancy, and HIV. The relapse rate among those with immune-mediated TTP was 19%, after a median time to relapse of 26 months.

In total, 71% of patients presented with neurological abnormalities, while slightly less than half (48%) had symptomatic thrombocytopenia (bleeding/petechiae).

Diagnostic tools showed that 64% of patients had an elevated troponin level, 92% had ADAMTS13 activity less than 10%, and 25% had a platelet count lower than 10 x 109/L.

Median platelet count upon presentation was 15 x 109/L, and median lactate dehydrogenase (LDH) exceeded 1,000 units/L. After 7 days of therapy, 58% of patients were still severely deficient in ADAMTS13 activity and 36% of patients still had a platelet count lower than 150 x 109/L.

Where information was available, 30% of patients had positive auto-antibody screens, although not necessarily with signs or symptoms of autoimmune disease. A total of 93% of patients had elevated ADAMTS13 IgG antibody upon presentation. The median ADAMTS13 IgG antibody level at presentation was 37%, with a normal value being less than 6%.

Nearly half of patients with immune-mediated TTP (45%) required intensive care, and 10% of these patients were intubated and ventilated. Most patients were treated with steroids upon admission (81%). On average, 11 plasma exchanges (PEXs) were required before remission.

The investigators noted that “[t]he number of PEXs to remission appears to have decreased over the years.” As an example, a median of 14 PEXs were needed from 2009 to 2010, compared with 8 from 2017 to 2018.

Although rituximab usage in the acute setting held steady over the 10-year period, elective use increased. Out of 89 instances of subacute relapse, elective rituximab was given twice from 2009 to 2010, compared with 26 times from 2017 to 2018.

Comparing features of survival, the investigators found that the median ADAMTS13 IgG antibody level was higher among those who died. Other factors related to increased mortality risk included raised troponin (sevenfold increased risk) and neurological abnormalities, defined by reduced Glasgow Coma Scale score (sixfold increased risk).

“Our data confirm other registries worldwide; in particular, increased susceptibility in women, the Afro-Caribbean population, and those who are middle-aged,” Dr. Shin said. “Our data also show that elevated cardiac troponin and neurological involvement are indicators of poor prognosis. Also, raised antibody levels appear to be associated with a worse clinical outcome and increased mortality rate. These are clearly valuable markers in clinical practice, allowing for intensive care of high-risk patients.”

The investigators reported having no conflicts of interest.
 

Neurological abnormalities and elevated troponin predict mortality in patients with thrombotic thrombocytopenic purpura (TTP), according to retrospective analysis of 475 patients from the United Kingdom TTP registry.

Will Pass/MDedge News
Dr. Jin-Sup Shin

In addition, low ADAMTS13 activity (less than 10%) was present in 92% of immune-mediated of TTP upon acute presentation, reported lead author Jin-Sup Shin, MD, of University College London Hospital, and colleagues.

Presenting at the annual meeting of the British Society for Haematology, Dr. Shin provided some background on TTP, a condition that most clinicians encounter infrequently.

“As recently as the 1980s and 90s, when etiology was not that well understood, TTP was associated with an untreated mortality of up to 90%,” Dr. Shin said. “However, based on improved understanding of pathophysiology, and through the creation of TTP registries worldwide, there have been major advances in diagnosis, treatment, and outcomes.”

To gain insight into diagnostic and prognostic characteristics of TTP, the investigators turned to data from 602 patients with clinically suspected TTP, based on an ADAMTS13 activity level less than 10% of normal and associated clinical signs. Out of these 602 patients, 475 consented to registry participation and data analysis.

The analysis revealed a mortality rate of 4%, although Dr. Shin said that “this is probably an underestimate of the true figure,” as it excludes those who died before treatment could be initiated.

Nearly three-quarters of patients were female. The median age at presentation was 43 years, with a range of 1-93 years. The most commonly represented racial/ethnic groups were white (60%) and Afro-Caribbean (22%). Some cases were congenital (16%), but the majority were immune mediated (84%).

The immune-mediated group was the primary focus of Dr. Shin’s report. In this cohort, 76% of cases were idiopathic, while the remainder had a defined precipitant; most common were infection, autoimmune disease, pregnancy, and HIV. The relapse rate among those with immune-mediated TTP was 19%, after a median time to relapse of 26 months.

In total, 71% of patients presented with neurological abnormalities, while slightly less than half (48%) had symptomatic thrombocytopenia (bleeding/petechiae).

Diagnostic tools showed that 64% of patients had an elevated troponin level, 92% had ADAMTS13 activity less than 10%, and 25% had a platelet count lower than 10 x 109/L.

Median platelet count upon presentation was 15 x 109/L, and median lactate dehydrogenase (LDH) exceeded 1,000 units/L. After 7 days of therapy, 58% of patients were still severely deficient in ADAMTS13 activity and 36% of patients still had a platelet count lower than 150 x 109/L.

Where information was available, 30% of patients had positive auto-antibody screens, although not necessarily with signs or symptoms of autoimmune disease. A total of 93% of patients had elevated ADAMTS13 IgG antibody upon presentation. The median ADAMTS13 IgG antibody level at presentation was 37%, with a normal value being less than 6%.

Nearly half of patients with immune-mediated TTP (45%) required intensive care, and 10% of these patients were intubated and ventilated. Most patients were treated with steroids upon admission (81%). On average, 11 plasma exchanges (PEXs) were required before remission.

The investigators noted that “[t]he number of PEXs to remission appears to have decreased over the years.” As an example, a median of 14 PEXs were needed from 2009 to 2010, compared with 8 from 2017 to 2018.

Although rituximab usage in the acute setting held steady over the 10-year period, elective use increased. Out of 89 instances of subacute relapse, elective rituximab was given twice from 2009 to 2010, compared with 26 times from 2017 to 2018.

Comparing features of survival, the investigators found that the median ADAMTS13 IgG antibody level was higher among those who died. Other factors related to increased mortality risk included raised troponin (sevenfold increased risk) and neurological abnormalities, defined by reduced Glasgow Coma Scale score (sixfold increased risk).

“Our data confirm other registries worldwide; in particular, increased susceptibility in women, the Afro-Caribbean population, and those who are middle-aged,” Dr. Shin said. “Our data also show that elevated cardiac troponin and neurological involvement are indicators of poor prognosis. Also, raised antibody levels appear to be associated with a worse clinical outcome and increased mortality rate. These are clearly valuable markers in clinical practice, allowing for intensive care of high-risk patients.”

The investigators reported having no conflicts of interest.
 

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Key clinical point: Neurological abnormalities and elevated troponin predict mortality in patients with thrombotic thrombocytopenic purpura (TTP).

Major finding: ADAMTS13 IgG antibody level, elevated troponin, and neurological abnormalities were all linked to an increased mortality risk.

Study details: A retrospective analysis of 475 patients with clinically suspected thrombotic thrombocytopenic purpura (TTP) from the U.K. registry (2009-2018).

Disclosures: The investigators reported having no conflicts of interest.

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Tagraxofusp produces high response rate in BPDCN

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Wed, 04/24/2019 - 17:55

Tagraxofusp demonstrated efficacy in a phase 2 trial of patients with previously treated or untreated blastic plasmacytoid dendritic cell neoplasm (BPDCN).

The overall response rate was 90% in previously untreated patients who received the highest dose of tagraxofusp and 67% in patients with relapsed/refractory BPDCN.

The researchers wrote that capillary leak syndrome (CLS) was an important adverse event in this trial, as it caused two deaths. However, the researchers developed strategies that appear to mitigate the risk of CLS in patients taking tagraxofusp.

Naveen Pemmaraju, MD, of the University of Texas MD Anderson Cancer Center, Houston, and his colleagues conducted the trial and reported the results in the New England Journal of Medicine.

The trial included 47 patients – 32 with previously untreated BPDCN and 15 with relapsed/refractory BPDCN. The patients’ median age at baseline was 70 years and 83% were men.

Three patients (all previously untreated) received tagraxofusp at 7 mcg/kg per day, and 44 patients received a 12 mcg/kg per day dose. All patients were treated on days 1-5 of a 21-day cycle.

Response and survival

In the 29 previously untreated patients who received the 12 mcg/kg dose of tagraxofusp, the overall response rate was 90%. The rate of complete response plus clinical complete response in these patients was 72%.

In the 15 patients with relapsed/refractory BPDCN, the overall response rate was 67%, and the rate of complete response plus clinical complete response was 33%.

A total of 14 patients, 13 of whom had previously untreated BPDCN, went on to transplant.

In the 29 previously untreated patients, the median overall survival was not reached at a median follow-up of 25 months. The overall survival rate was 62% at 12 months, 59% at 18 months, and 52% at 24 months.

In the 15 previously treated patients, the median overall survival was 8.5 months.

Safety

Common adverse events in this trial were ALT increase (64%), AST increase (60%), hypoalbuminemia (55%), peripheral edema (51%), thrombocytopenia (49%), nausea (45%), pyrexia (45%), and fatigue (45%).

Among the 44 patients who received the 12 mcg/kg dose of tagraxofusp, 8 (18%) developed CLS. Six patients had grade 2 CLS, one had grade 4, and one had grade 5. There was an additional CLS-related death in a patient who received tagraxofusp at 7 mcg/kg.


After the first death, the trial protocol was amended to reduce CLS risk. Inclusion criteria were changed so that patients must have normal cardiac function, adequate kidney function, and serum albumin of at least 3.2 g/dL. Additionally, the researchers began monitoring patients’ weight, albumin levels, and kidney function. The team withheld tagraxofusp if patients experienced rapid weight gain or if their serum albumin or systolic blood pressure fell too low.

The trial was sponsored by Stemline Therapeutics. The researchers reported relationships with Stemline and other companies.

SOURCE: Pemmaraju N et al. N Engl J Med. 2019; 380:1628-37.

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Tagraxofusp demonstrated efficacy in a phase 2 trial of patients with previously treated or untreated blastic plasmacytoid dendritic cell neoplasm (BPDCN).

The overall response rate was 90% in previously untreated patients who received the highest dose of tagraxofusp and 67% in patients with relapsed/refractory BPDCN.

The researchers wrote that capillary leak syndrome (CLS) was an important adverse event in this trial, as it caused two deaths. However, the researchers developed strategies that appear to mitigate the risk of CLS in patients taking tagraxofusp.

Naveen Pemmaraju, MD, of the University of Texas MD Anderson Cancer Center, Houston, and his colleagues conducted the trial and reported the results in the New England Journal of Medicine.

The trial included 47 patients – 32 with previously untreated BPDCN and 15 with relapsed/refractory BPDCN. The patients’ median age at baseline was 70 years and 83% were men.

Three patients (all previously untreated) received tagraxofusp at 7 mcg/kg per day, and 44 patients received a 12 mcg/kg per day dose. All patients were treated on days 1-5 of a 21-day cycle.

Response and survival

In the 29 previously untreated patients who received the 12 mcg/kg dose of tagraxofusp, the overall response rate was 90%. The rate of complete response plus clinical complete response in these patients was 72%.

In the 15 patients with relapsed/refractory BPDCN, the overall response rate was 67%, and the rate of complete response plus clinical complete response was 33%.

A total of 14 patients, 13 of whom had previously untreated BPDCN, went on to transplant.

In the 29 previously untreated patients, the median overall survival was not reached at a median follow-up of 25 months. The overall survival rate was 62% at 12 months, 59% at 18 months, and 52% at 24 months.

In the 15 previously treated patients, the median overall survival was 8.5 months.

Safety

Common adverse events in this trial were ALT increase (64%), AST increase (60%), hypoalbuminemia (55%), peripheral edema (51%), thrombocytopenia (49%), nausea (45%), pyrexia (45%), and fatigue (45%).

Among the 44 patients who received the 12 mcg/kg dose of tagraxofusp, 8 (18%) developed CLS. Six patients had grade 2 CLS, one had grade 4, and one had grade 5. There was an additional CLS-related death in a patient who received tagraxofusp at 7 mcg/kg.


After the first death, the trial protocol was amended to reduce CLS risk. Inclusion criteria were changed so that patients must have normal cardiac function, adequate kidney function, and serum albumin of at least 3.2 g/dL. Additionally, the researchers began monitoring patients’ weight, albumin levels, and kidney function. The team withheld tagraxofusp if patients experienced rapid weight gain or if their serum albumin or systolic blood pressure fell too low.

The trial was sponsored by Stemline Therapeutics. The researchers reported relationships with Stemline and other companies.

SOURCE: Pemmaraju N et al. N Engl J Med. 2019; 380:1628-37.

Tagraxofusp demonstrated efficacy in a phase 2 trial of patients with previously treated or untreated blastic plasmacytoid dendritic cell neoplasm (BPDCN).

The overall response rate was 90% in previously untreated patients who received the highest dose of tagraxofusp and 67% in patients with relapsed/refractory BPDCN.

The researchers wrote that capillary leak syndrome (CLS) was an important adverse event in this trial, as it caused two deaths. However, the researchers developed strategies that appear to mitigate the risk of CLS in patients taking tagraxofusp.

Naveen Pemmaraju, MD, of the University of Texas MD Anderson Cancer Center, Houston, and his colleagues conducted the trial and reported the results in the New England Journal of Medicine.

The trial included 47 patients – 32 with previously untreated BPDCN and 15 with relapsed/refractory BPDCN. The patients’ median age at baseline was 70 years and 83% were men.

Three patients (all previously untreated) received tagraxofusp at 7 mcg/kg per day, and 44 patients received a 12 mcg/kg per day dose. All patients were treated on days 1-5 of a 21-day cycle.

Response and survival

In the 29 previously untreated patients who received the 12 mcg/kg dose of tagraxofusp, the overall response rate was 90%. The rate of complete response plus clinical complete response in these patients was 72%.

In the 15 patients with relapsed/refractory BPDCN, the overall response rate was 67%, and the rate of complete response plus clinical complete response was 33%.

A total of 14 patients, 13 of whom had previously untreated BPDCN, went on to transplant.

In the 29 previously untreated patients, the median overall survival was not reached at a median follow-up of 25 months. The overall survival rate was 62% at 12 months, 59% at 18 months, and 52% at 24 months.

In the 15 previously treated patients, the median overall survival was 8.5 months.

Safety

Common adverse events in this trial were ALT increase (64%), AST increase (60%), hypoalbuminemia (55%), peripheral edema (51%), thrombocytopenia (49%), nausea (45%), pyrexia (45%), and fatigue (45%).

Among the 44 patients who received the 12 mcg/kg dose of tagraxofusp, 8 (18%) developed CLS. Six patients had grade 2 CLS, one had grade 4, and one had grade 5. There was an additional CLS-related death in a patient who received tagraxofusp at 7 mcg/kg.


After the first death, the trial protocol was amended to reduce CLS risk. Inclusion criteria were changed so that patients must have normal cardiac function, adequate kidney function, and serum albumin of at least 3.2 g/dL. Additionally, the researchers began monitoring patients’ weight, albumin levels, and kidney function. The team withheld tagraxofusp if patients experienced rapid weight gain or if their serum albumin or systolic blood pressure fell too low.

The trial was sponsored by Stemline Therapeutics. The researchers reported relationships with Stemline and other companies.

SOURCE: Pemmaraju N et al. N Engl J Med. 2019; 380:1628-37.

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Key clinical point: Tagraxofusp produced responses in patients with blastic plasmacytoid dendritic cell neoplasm (BPDCN).

Major finding: The overall response rate was 90% in previously untreated patients who received the highest dose of tagraxofusp and 67% in patients with relapsed/refractory BPDCN.

Study details: A phase 2 trial of 47 patients, 32 with previously untreated BPDCN and 15 with relapsed/refractory BPDCN.

Disclosures: The trial was sponsored by Stemline Therapeutics. The researchers reported relationships with Stemline and other companies.

Source: Pemmaraju N et al. N Engl J Med. 2019;380:1628-37.

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High-dose MTX-based chemo is well tolerated in older PCNSL patients

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Wed, 01/11/2023 - 15:12

 

– Most older patients with primary central nervous system lymphoma (PCNSL) can tolerate high-dose methotrexate-based chemotherapy and achieve similar outcomes as younger and fitter patients, according to a retrospective analysis of 244 patients in the United Kingdom.

Will Pass/MDedge News
Dr. Edward Poynton

For older patients – at least 65 years old – who received methotrexate-based regimens, treatment-related mortality was 6.8%, which is comparable with rates seen in trials involving younger patients, reported lead author Edward Poynton, MD, of University College Hospital in London.

Specifically, Dr. Poynton cited the phase 2 IELSG32 trial, which had a treatment-related mortality rate of 6% among patients up to age 70 years. These patients were treated with the established protocol for younger patients: chemotherapy with methotrexate, cytarabine, thiotepa, and rituximab (MATRix) followed by autologous stem cell transplant or whole-brain radiotherapy.

Introducing Dr. Poynton’s presentation at the annual meeting of the British Society for Haematology, Simon Rule, MD, of the University of Plymouth (England), added historical context to the new findings.

Will Pass/MDedge News
Dr. Simon Rule

“When I started in hematology ... [PCNSL] was a universally fatal disease, pretty much,” Dr. Rule said. “And then we had methotrexate, and it worked occasionally. And then we had a randomized trial, which was randomization of methotrexate plus or minus high-dose cytarabine, showing benefit.”

This combination became the benchmark against which subsequent randomized trials were measured; however, such high-intensity regimens have raised concerns about safety and efficacy in older patients, Dr. Rule said, noting that the present study serves to inform clinicians about real-world outcomes in this population.

The retrospective analysis reviewed 244 patients who were aged at least 65 years when histologically diagnosed with PCNSL at 14 U.K. tertiary centers between 2012 and 2017. All patients received first-line care of any kind, ranging from best supportive care to clinical trial therapy. Patients were grouped into three treatment cohorts divided by level of frailty. Analysis showed that these divisions correlated with age, renal function, Eastern Cooperative Oncology Group performance status, and treatment intensity.

The frail group received palliative treatment consisting of whole-brain radiotherapy, an oral alkylator, or best supportive care. The less-fit group received methotrexate in combination with rituximab, an oral alkylator, or both. The fit group was most intensively treated, receiving high-dose methotrexate and cytarabine – with or without rituximab – or MATRix.

The primary objective was overall response rate, while the secondary objectives were median overall survival and progression-free survival.

The analysis showed that 79% of patients (n = 193) received methotrexate-based therapy of some kind, with 61% receiving three or more cycles of therapy and 30% requiring dose reductions. The overall response rate was 63%.

Dr. Poynton noted that about two-thirds of patients who achieved a partial response in early assessment went on to achieve a complete response. Patients in the fit group more often responded than those who were less fit (87% vs. 65%; P = .01) and more often received consolidation therapy (42% vs. 23%; P = .01).

Fitness level was also associated with median overall survival, which was longest in the fit group at 42 months. The other two groups had dramatically shorter survival times: 8 months in the less-fit group and just 2 months in the frail group.

A closer look at the data revealed some patterns, Dr. Poynton said.

“What we see is that age at diagnosis is significantly correlated with progression-free survival but not with overall survival,” he said, noting that, in contrast, performance status was associated with both survival measures.

Methotrexate dose also impacted both survival measures. Patients who received 75% or more of their induction dose over the course of treatment had better median overall survival and progression-free survival than those who received less than 75%. Similarly, consolidation therapy improved both survival measures.

Patients aged older than 70 years who received intensive chemotherapy had a treatment-related mortality rate of 4.8%, which is lower than the overall treatment-related mortality, Dr. Poynton reported.

Considering the correlation between methotrexate dose and survival, Dr. Poynton suggested that “dose reductions should be carefully considered.”

He also noted that patients in the fit cohort who received intensive chemotherapy had comparable outcomes with younger patients in prospective trials, and yet 44% of patients older than 65 years in the real world who received high-dose methotrexate with cytarabine would have been ineligible for the IELSG32 trial.

“We’ve been able to identify this cohort of patients retrospectively,” Dr. Poynton said. “They definitely exist, and I think we need to work harder at how are going to identify these patients prospectively in the future, so we know which of our patients who are older can benefit from intensive chemotherapy and which patients won’t.”

Dr. Poynton reported having no relevant financial disclosures. His coinvestigators reported relationships with AbbVie, Merck, Takeda, Jazz Pharmaceuticals, and others.

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– Most older patients with primary central nervous system lymphoma (PCNSL) can tolerate high-dose methotrexate-based chemotherapy and achieve similar outcomes as younger and fitter patients, according to a retrospective analysis of 244 patients in the United Kingdom.

Will Pass/MDedge News
Dr. Edward Poynton

For older patients – at least 65 years old – who received methotrexate-based regimens, treatment-related mortality was 6.8%, which is comparable with rates seen in trials involving younger patients, reported lead author Edward Poynton, MD, of University College Hospital in London.

Specifically, Dr. Poynton cited the phase 2 IELSG32 trial, which had a treatment-related mortality rate of 6% among patients up to age 70 years. These patients were treated with the established protocol for younger patients: chemotherapy with methotrexate, cytarabine, thiotepa, and rituximab (MATRix) followed by autologous stem cell transplant or whole-brain radiotherapy.

Introducing Dr. Poynton’s presentation at the annual meeting of the British Society for Haematology, Simon Rule, MD, of the University of Plymouth (England), added historical context to the new findings.

Will Pass/MDedge News
Dr. Simon Rule

“When I started in hematology ... [PCNSL] was a universally fatal disease, pretty much,” Dr. Rule said. “And then we had methotrexate, and it worked occasionally. And then we had a randomized trial, which was randomization of methotrexate plus or minus high-dose cytarabine, showing benefit.”

This combination became the benchmark against which subsequent randomized trials were measured; however, such high-intensity regimens have raised concerns about safety and efficacy in older patients, Dr. Rule said, noting that the present study serves to inform clinicians about real-world outcomes in this population.

The retrospective analysis reviewed 244 patients who were aged at least 65 years when histologically diagnosed with PCNSL at 14 U.K. tertiary centers between 2012 and 2017. All patients received first-line care of any kind, ranging from best supportive care to clinical trial therapy. Patients were grouped into three treatment cohorts divided by level of frailty. Analysis showed that these divisions correlated with age, renal function, Eastern Cooperative Oncology Group performance status, and treatment intensity.

The frail group received palliative treatment consisting of whole-brain radiotherapy, an oral alkylator, or best supportive care. The less-fit group received methotrexate in combination with rituximab, an oral alkylator, or both. The fit group was most intensively treated, receiving high-dose methotrexate and cytarabine – with or without rituximab – or MATRix.

The primary objective was overall response rate, while the secondary objectives were median overall survival and progression-free survival.

The analysis showed that 79% of patients (n = 193) received methotrexate-based therapy of some kind, with 61% receiving three or more cycles of therapy and 30% requiring dose reductions. The overall response rate was 63%.

Dr. Poynton noted that about two-thirds of patients who achieved a partial response in early assessment went on to achieve a complete response. Patients in the fit group more often responded than those who were less fit (87% vs. 65%; P = .01) and more often received consolidation therapy (42% vs. 23%; P = .01).

Fitness level was also associated with median overall survival, which was longest in the fit group at 42 months. The other two groups had dramatically shorter survival times: 8 months in the less-fit group and just 2 months in the frail group.

A closer look at the data revealed some patterns, Dr. Poynton said.

“What we see is that age at diagnosis is significantly correlated with progression-free survival but not with overall survival,” he said, noting that, in contrast, performance status was associated with both survival measures.

Methotrexate dose also impacted both survival measures. Patients who received 75% or more of their induction dose over the course of treatment had better median overall survival and progression-free survival than those who received less than 75%. Similarly, consolidation therapy improved both survival measures.

Patients aged older than 70 years who received intensive chemotherapy had a treatment-related mortality rate of 4.8%, which is lower than the overall treatment-related mortality, Dr. Poynton reported.

Considering the correlation between methotrexate dose and survival, Dr. Poynton suggested that “dose reductions should be carefully considered.”

He also noted that patients in the fit cohort who received intensive chemotherapy had comparable outcomes with younger patients in prospective trials, and yet 44% of patients older than 65 years in the real world who received high-dose methotrexate with cytarabine would have been ineligible for the IELSG32 trial.

“We’ve been able to identify this cohort of patients retrospectively,” Dr. Poynton said. “They definitely exist, and I think we need to work harder at how are going to identify these patients prospectively in the future, so we know which of our patients who are older can benefit from intensive chemotherapy and which patients won’t.”

Dr. Poynton reported having no relevant financial disclosures. His coinvestigators reported relationships with AbbVie, Merck, Takeda, Jazz Pharmaceuticals, and others.

 

– Most older patients with primary central nervous system lymphoma (PCNSL) can tolerate high-dose methotrexate-based chemotherapy and achieve similar outcomes as younger and fitter patients, according to a retrospective analysis of 244 patients in the United Kingdom.

Will Pass/MDedge News
Dr. Edward Poynton

For older patients – at least 65 years old – who received methotrexate-based regimens, treatment-related mortality was 6.8%, which is comparable with rates seen in trials involving younger patients, reported lead author Edward Poynton, MD, of University College Hospital in London.

Specifically, Dr. Poynton cited the phase 2 IELSG32 trial, which had a treatment-related mortality rate of 6% among patients up to age 70 years. These patients were treated with the established protocol for younger patients: chemotherapy with methotrexate, cytarabine, thiotepa, and rituximab (MATRix) followed by autologous stem cell transplant or whole-brain radiotherapy.

Introducing Dr. Poynton’s presentation at the annual meeting of the British Society for Haematology, Simon Rule, MD, of the University of Plymouth (England), added historical context to the new findings.

Will Pass/MDedge News
Dr. Simon Rule

“When I started in hematology ... [PCNSL] was a universally fatal disease, pretty much,” Dr. Rule said. “And then we had methotrexate, and it worked occasionally. And then we had a randomized trial, which was randomization of methotrexate plus or minus high-dose cytarabine, showing benefit.”

This combination became the benchmark against which subsequent randomized trials were measured; however, such high-intensity regimens have raised concerns about safety and efficacy in older patients, Dr. Rule said, noting that the present study serves to inform clinicians about real-world outcomes in this population.

The retrospective analysis reviewed 244 patients who were aged at least 65 years when histologically diagnosed with PCNSL at 14 U.K. tertiary centers between 2012 and 2017. All patients received first-line care of any kind, ranging from best supportive care to clinical trial therapy. Patients were grouped into three treatment cohorts divided by level of frailty. Analysis showed that these divisions correlated with age, renal function, Eastern Cooperative Oncology Group performance status, and treatment intensity.

The frail group received palliative treatment consisting of whole-brain radiotherapy, an oral alkylator, or best supportive care. The less-fit group received methotrexate in combination with rituximab, an oral alkylator, or both. The fit group was most intensively treated, receiving high-dose methotrexate and cytarabine – with or without rituximab – or MATRix.

The primary objective was overall response rate, while the secondary objectives were median overall survival and progression-free survival.

The analysis showed that 79% of patients (n = 193) received methotrexate-based therapy of some kind, with 61% receiving three or more cycles of therapy and 30% requiring dose reductions. The overall response rate was 63%.

Dr. Poynton noted that about two-thirds of patients who achieved a partial response in early assessment went on to achieve a complete response. Patients in the fit group more often responded than those who were less fit (87% vs. 65%; P = .01) and more often received consolidation therapy (42% vs. 23%; P = .01).

Fitness level was also associated with median overall survival, which was longest in the fit group at 42 months. The other two groups had dramatically shorter survival times: 8 months in the less-fit group and just 2 months in the frail group.

A closer look at the data revealed some patterns, Dr. Poynton said.

“What we see is that age at diagnosis is significantly correlated with progression-free survival but not with overall survival,” he said, noting that, in contrast, performance status was associated with both survival measures.

Methotrexate dose also impacted both survival measures. Patients who received 75% or more of their induction dose over the course of treatment had better median overall survival and progression-free survival than those who received less than 75%. Similarly, consolidation therapy improved both survival measures.

Patients aged older than 70 years who received intensive chemotherapy had a treatment-related mortality rate of 4.8%, which is lower than the overall treatment-related mortality, Dr. Poynton reported.

Considering the correlation between methotrexate dose and survival, Dr. Poynton suggested that “dose reductions should be carefully considered.”

He also noted that patients in the fit cohort who received intensive chemotherapy had comparable outcomes with younger patients in prospective trials, and yet 44% of patients older than 65 years in the real world who received high-dose methotrexate with cytarabine would have been ineligible for the IELSG32 trial.

“We’ve been able to identify this cohort of patients retrospectively,” Dr. Poynton said. “They definitely exist, and I think we need to work harder at how are going to identify these patients prospectively in the future, so we know which of our patients who are older can benefit from intensive chemotherapy and which patients won’t.”

Dr. Poynton reported having no relevant financial disclosures. His coinvestigators reported relationships with AbbVie, Merck, Takeda, Jazz Pharmaceuticals, and others.

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Ixekizumab posts positive results in phase 3 nr-axSpA trial

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Wed, 04/24/2019 - 15:35

 

Eli Lilly has announced positive results from COAST-X, a 52-week, placebo-controlled, phase 3 trial evaluating ixekizumab (Taltz) in biologic disease-modifying antirheumatic drug–naive patients with nonradiographic axial spondyloarthritis (nr-axSpA).

Ixekizumab met the primary endpoint of statistically significant improvement in nr-axSpA symptoms as measured by Assessment of Spondyloarthritis International Society 40 response at both week 16 and week 52, compared with patients who received placebo. The drug also met all secondary endpoints, including significant improvement in Ankylosing Spondylitis Disease Activity Score, significant improvement in Bath Ankylosing Spondylitis Disease Activity, proportion of patients achieving low disease activity, significant improvement in sacroiliac joint inflammation as assessed by MRI, and significant improvement in 36-Item Short Form Health Survey Physical Component Summary score.

The safety profile of ixekizumab was broadly similar to what has been seen in previous phase 3 trials; the most common adverse events include injection site reactions, upper respiratory tract infections, nausea, and tinea infections, the company said.

“Nonradiographic axSpA is a challenging diagnosis that is not only missed in clinics, but also has limited treatment options for physicians to offer patients. The COAST-X results offer compelling evidence that Taltz could provide a much-needed new alternative if approved for this patient population,” Atul A. Deodhar, MD, professor of medicine at Oregon Health & Science University, Portland, and clinical investigator for the COAST program, said in the press release.

Find the full press release on the Eli Lilly website.

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Eli Lilly has announced positive results from COAST-X, a 52-week, placebo-controlled, phase 3 trial evaluating ixekizumab (Taltz) in biologic disease-modifying antirheumatic drug–naive patients with nonradiographic axial spondyloarthritis (nr-axSpA).

Ixekizumab met the primary endpoint of statistically significant improvement in nr-axSpA symptoms as measured by Assessment of Spondyloarthritis International Society 40 response at both week 16 and week 52, compared with patients who received placebo. The drug also met all secondary endpoints, including significant improvement in Ankylosing Spondylitis Disease Activity Score, significant improvement in Bath Ankylosing Spondylitis Disease Activity, proportion of patients achieving low disease activity, significant improvement in sacroiliac joint inflammation as assessed by MRI, and significant improvement in 36-Item Short Form Health Survey Physical Component Summary score.

The safety profile of ixekizumab was broadly similar to what has been seen in previous phase 3 trials; the most common adverse events include injection site reactions, upper respiratory tract infections, nausea, and tinea infections, the company said.

“Nonradiographic axSpA is a challenging diagnosis that is not only missed in clinics, but also has limited treatment options for physicians to offer patients. The COAST-X results offer compelling evidence that Taltz could provide a much-needed new alternative if approved for this patient population,” Atul A. Deodhar, MD, professor of medicine at Oregon Health & Science University, Portland, and clinical investigator for the COAST program, said in the press release.

Find the full press release on the Eli Lilly website.

 

Eli Lilly has announced positive results from COAST-X, a 52-week, placebo-controlled, phase 3 trial evaluating ixekizumab (Taltz) in biologic disease-modifying antirheumatic drug–naive patients with nonradiographic axial spondyloarthritis (nr-axSpA).

Ixekizumab met the primary endpoint of statistically significant improvement in nr-axSpA symptoms as measured by Assessment of Spondyloarthritis International Society 40 response at both week 16 and week 52, compared with patients who received placebo. The drug also met all secondary endpoints, including significant improvement in Ankylosing Spondylitis Disease Activity Score, significant improvement in Bath Ankylosing Spondylitis Disease Activity, proportion of patients achieving low disease activity, significant improvement in sacroiliac joint inflammation as assessed by MRI, and significant improvement in 36-Item Short Form Health Survey Physical Component Summary score.

The safety profile of ixekizumab was broadly similar to what has been seen in previous phase 3 trials; the most common adverse events include injection site reactions, upper respiratory tract infections, nausea, and tinea infections, the company said.

“Nonradiographic axSpA is a challenging diagnosis that is not only missed in clinics, but also has limited treatment options for physicians to offer patients. The COAST-X results offer compelling evidence that Taltz could provide a much-needed new alternative if approved for this patient population,” Atul A. Deodhar, MD, professor of medicine at Oregon Health & Science University, Portland, and clinical investigator for the COAST program, said in the press release.

Find the full press release on the Eli Lilly website.

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Does Residential Mobility Affect Childhood Leukemia?

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Mon, 04/22/2019 - 03:33
A new study looks into the correlation between the dwelling of children and childhood leukemia.

Studies that look at the relationship between environment and childhood leukemia usually consider exposure at only a single residential address, such as the child’s home at birth or at time of diagnosis, say researchers from University of California and University of Southern California. But residential mobility, they contend, can have an impact on a number of relevant factors.

For instance, mobility can affect selection through the availability of data; cases are usually required to reside and be diagnosed in the same geographic area. It can affect exposure to electromagnetic fields and overhead power lines.  Residential mobility can also function as a marker for other risk factors for childhood leukemia, such as maternal place of birth and younger maternal age at birth, as well as increased exposure to viruses or other infections potentially linked to higher leukemia risk. Finally, the type of dwelling can affect not only exposure but exposure assessment. Mobile homes and apartments, for instance, are more likely to lead to poor geographic information system (GIS) matching of the residential address.

The researchers hoped with their study to “disentangle the effect of mobility.” Using the California Power Lines Study, they analyzed data from 4,879 childhood leukemia patients born in California and diagnosed between 1988 and 2008.

Many childhood leukemia cases were mobile, the researchers found: 2,982 (61%) children changed residence between birth and diagnosis. Of those who moved, 618 stayed within 2 km of their birth home; 1,992 moved outside of their birth neighborhood. Children who moved tended to be older, lived in housing other than single-family homes, had younger mothers and fewer siblings, and were of lower socioeconomic status.

However, the effects of distance to power lines and magnetic field exposure on childhood leukemia were similar for a subset of residentially stable cases, and overall results were unchanged when the researchers controlled for proxies of mobility (except for dwelling). They found an OR for childhood leukemia of 1.44 for those whose birth residence was within 50 m of a 200+ kV line, and an OR of 1.50 for the highest exposure of calculated fields, compared with 1.62 and 1.71, respectively, among children who stayed in place.

While they believe their findings on mobility are relevant to other environmental exposures and other childhood outcome studies, the researchers conclude that confounding by mobility is an unlikely explanation for the associations observed between power lines exposure and childhood leukemia.

 

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A new study looks into the correlation between the dwelling of children and childhood leukemia.
A new study looks into the correlation between the dwelling of children and childhood leukemia.

Studies that look at the relationship between environment and childhood leukemia usually consider exposure at only a single residential address, such as the child’s home at birth or at time of diagnosis, say researchers from University of California and University of Southern California. But residential mobility, they contend, can have an impact on a number of relevant factors.

For instance, mobility can affect selection through the availability of data; cases are usually required to reside and be diagnosed in the same geographic area. It can affect exposure to electromagnetic fields and overhead power lines.  Residential mobility can also function as a marker for other risk factors for childhood leukemia, such as maternal place of birth and younger maternal age at birth, as well as increased exposure to viruses or other infections potentially linked to higher leukemia risk. Finally, the type of dwelling can affect not only exposure but exposure assessment. Mobile homes and apartments, for instance, are more likely to lead to poor geographic information system (GIS) matching of the residential address.

The researchers hoped with their study to “disentangle the effect of mobility.” Using the California Power Lines Study, they analyzed data from 4,879 childhood leukemia patients born in California and diagnosed between 1988 and 2008.

Many childhood leukemia cases were mobile, the researchers found: 2,982 (61%) children changed residence between birth and diagnosis. Of those who moved, 618 stayed within 2 km of their birth home; 1,992 moved outside of their birth neighborhood. Children who moved tended to be older, lived in housing other than single-family homes, had younger mothers and fewer siblings, and were of lower socioeconomic status.

However, the effects of distance to power lines and magnetic field exposure on childhood leukemia were similar for a subset of residentially stable cases, and overall results were unchanged when the researchers controlled for proxies of mobility (except for dwelling). They found an OR for childhood leukemia of 1.44 for those whose birth residence was within 50 m of a 200+ kV line, and an OR of 1.50 for the highest exposure of calculated fields, compared with 1.62 and 1.71, respectively, among children who stayed in place.

While they believe their findings on mobility are relevant to other environmental exposures and other childhood outcome studies, the researchers conclude that confounding by mobility is an unlikely explanation for the associations observed between power lines exposure and childhood leukemia.

 

Studies that look at the relationship between environment and childhood leukemia usually consider exposure at only a single residential address, such as the child’s home at birth or at time of diagnosis, say researchers from University of California and University of Southern California. But residential mobility, they contend, can have an impact on a number of relevant factors.

For instance, mobility can affect selection through the availability of data; cases are usually required to reside and be diagnosed in the same geographic area. It can affect exposure to electromagnetic fields and overhead power lines.  Residential mobility can also function as a marker for other risk factors for childhood leukemia, such as maternal place of birth and younger maternal age at birth, as well as increased exposure to viruses or other infections potentially linked to higher leukemia risk. Finally, the type of dwelling can affect not only exposure but exposure assessment. Mobile homes and apartments, for instance, are more likely to lead to poor geographic information system (GIS) matching of the residential address.

The researchers hoped with their study to “disentangle the effect of mobility.” Using the California Power Lines Study, they analyzed data from 4,879 childhood leukemia patients born in California and diagnosed between 1988 and 2008.

Many childhood leukemia cases were mobile, the researchers found: 2,982 (61%) children changed residence between birth and diagnosis. Of those who moved, 618 stayed within 2 km of their birth home; 1,992 moved outside of their birth neighborhood. Children who moved tended to be older, lived in housing other than single-family homes, had younger mothers and fewer siblings, and were of lower socioeconomic status.

However, the effects of distance to power lines and magnetic field exposure on childhood leukemia were similar for a subset of residentially stable cases, and overall results were unchanged when the researchers controlled for proxies of mobility (except for dwelling). They found an OR for childhood leukemia of 1.44 for those whose birth residence was within 50 m of a 200+ kV line, and an OR of 1.50 for the highest exposure of calculated fields, compared with 1.62 and 1.71, respectively, among children who stayed in place.

While they believe their findings on mobility are relevant to other environmental exposures and other childhood outcome studies, the researchers conclude that confounding by mobility is an unlikely explanation for the associations observed between power lines exposure and childhood leukemia.

 

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Creating CAR T-cell therapies for T-cell malignancies

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NEWPORT BEACH, CALIF. – Preclinical research has revealed workarounds that may make chimeric antigen receptor (CAR) T-cell therapy feasible for patients with T-cell malignancies.

Researchers have found that using allogeneic cells for CAR T-cell therapy can eliminate contamination by malignant T cells, and editing those allogeneic T cells to delete the target antigen and the T-cell receptor alpha chain (TRAC) can prevent fratricide and graft-versus-host disease (GVHD).

Additionally, an interleukin-7 molecule called NT-I7 has been shown to enhance CAR T-cell proliferation, differentiation, and tumor killing in a mouse model of a T-cell malignancy.

John F. DiPersio, MD, PhD, of Washington University in St. Louis, described this work in a presentation at the Acute Leukemia Forum of Hemedicus.
 

Obstacles to development

“The primary obstacle for targeting T-cell malignancies with a T cell is that all of the targets that are on the [malignant] T cells are also expressed on the normal T cells,” Dr. DiPersio said. “So when you put a CAR into a normal T cell, it just kills itself. It’s called fratricide.”

A second issue that has limited development is that the phenotype of the malignant T cell in the blood is similar to a normal T cell, so they can’t be separated, he explained.

“So if you were to do anything to a normal T cell, you would also be doing it, in theory, to the malignant T cell – in theory, making it resistant to therapy,” he said.

A third obstacle, which has been seen in patients with B-cell malignancies as well, is the inability to harvest enough T cells to generate effective CAR T-cell therapy.

And a fourth obstacle is that T cells from patients with malignancies may not function normally because they have been exposed to prior therapies.

Dr. DiPersio and his colleagues believe these obstacles can be overcome by creating CAR T-cell therapies using T cells derived from healthy donors or cord blood, using gene editing to remove the target antigen and TRAC, and using NT-I7 to enhance the efficacy of these universal, “off-the-shelf” CAR T cells.

The researchers have tested these theories, and achieved successes, in preclinical models. The team is now planning a clinical trial in patients at Washington University. Dr. DiPersio and his colleagues also created a company called WUGEN that will develop the universal CAR T-cell therapies if the initial proof-of-principle trial proves successful.
 

UCART7

One of the universal CAR T-cell therapies Dr. DiPersio and his colleagues have tested is UCART7, which targets CD7. Dr. DiPersio noted that CD7 is expressed on 98% of T-cell acute lymphoblastic leukemias (T-ALLs), 24% of acute myeloid leukemias, natural killer (NK) cells, and T cells.

The researchers created UCART7 by using CRISPR/Cas9 to delete CD7 and TRAC from allogeneic T cells and following this with lentiviral transduction with a third-generation CD7-CAR. The team found a way to delete both TRAC and CD7 in a single day with 95% efficiency, Dr. DiPersio noted.

“Knocking out CD7 doesn’t seem to have any impact on the expansion or trafficking of these T cells in vivo,” Dr. DiPersio said. “So we think that deleting that target in a normal T cell will not affect its overall ability to kill a target when we put a CAR into those T cells.”

In fact, the researchers’ experiments showed that UCART7 can kill T-ALL cells in vitro and target primary T-ALL in vivo without inducing GVHD (Leukemia. 2018 Sep;32[9]:1970-83.)
 

 

 

UCART2 and NT-I7

Dr. DiPersio and his colleagues have also tested UCART2, an allogeneic CAR T-cell therapy in which CD2 and TRAC are deleted. The therapy targets CD2 because this antigen is expressed on T-ALL and other T-cell and NK-cell malignancies. Experiments showed that UCART2 targets T-cell malignancies, including T-ALL and cutaneous T-cell lymphoma, in vitro.

The researchers also tested UCART2 in a mouse model of Sézary syndrome. In these experiments, UCART2 was combined with NT-I7.

NT-I7 enhanced the proliferation, persistence, and tumor killing ability of UCART2. Sézary mice that received UCART2 and NT-I7 had “virtually no tumor burden,” according to researchers, and survived longer than mice treated with UCART2 alone (Blood. 2018;132:340).

Dr. DiPersio noted that there was no cytokine release syndrome because these were immunodeficient mice. However, cytokine release syndrome may be a side effect of NT-I7 in patients as NT-I7 induces rapid expansion of CAR T cells.

Dr. DiPersio reported ownership and investment in WUGEN and Magenta Therapeutics. He also has relationships with Cellworks Group, Tioma Therapeutics, RiverVest Venture Partners, Bioline, Asterias Biotherapeutics, Amphivena Therapeutics, Bluebird Bio, Celgene, Incyte, NeoImuneTech, and MacroGenics.

The Acute Leukemia Forum is organized by Hemedicus, which is owned by the same company as this news organization.

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NEWPORT BEACH, CALIF. – Preclinical research has revealed workarounds that may make chimeric antigen receptor (CAR) T-cell therapy feasible for patients with T-cell malignancies.

Researchers have found that using allogeneic cells for CAR T-cell therapy can eliminate contamination by malignant T cells, and editing those allogeneic T cells to delete the target antigen and the T-cell receptor alpha chain (TRAC) can prevent fratricide and graft-versus-host disease (GVHD).

Additionally, an interleukin-7 molecule called NT-I7 has been shown to enhance CAR T-cell proliferation, differentiation, and tumor killing in a mouse model of a T-cell malignancy.

John F. DiPersio, MD, PhD, of Washington University in St. Louis, described this work in a presentation at the Acute Leukemia Forum of Hemedicus.
 

Obstacles to development

“The primary obstacle for targeting T-cell malignancies with a T cell is that all of the targets that are on the [malignant] T cells are also expressed on the normal T cells,” Dr. DiPersio said. “So when you put a CAR into a normal T cell, it just kills itself. It’s called fratricide.”

A second issue that has limited development is that the phenotype of the malignant T cell in the blood is similar to a normal T cell, so they can’t be separated, he explained.

“So if you were to do anything to a normal T cell, you would also be doing it, in theory, to the malignant T cell – in theory, making it resistant to therapy,” he said.

A third obstacle, which has been seen in patients with B-cell malignancies as well, is the inability to harvest enough T cells to generate effective CAR T-cell therapy.

And a fourth obstacle is that T cells from patients with malignancies may not function normally because they have been exposed to prior therapies.

Dr. DiPersio and his colleagues believe these obstacles can be overcome by creating CAR T-cell therapies using T cells derived from healthy donors or cord blood, using gene editing to remove the target antigen and TRAC, and using NT-I7 to enhance the efficacy of these universal, “off-the-shelf” CAR T cells.

The researchers have tested these theories, and achieved successes, in preclinical models. The team is now planning a clinical trial in patients at Washington University. Dr. DiPersio and his colleagues also created a company called WUGEN that will develop the universal CAR T-cell therapies if the initial proof-of-principle trial proves successful.
 

UCART7

One of the universal CAR T-cell therapies Dr. DiPersio and his colleagues have tested is UCART7, which targets CD7. Dr. DiPersio noted that CD7 is expressed on 98% of T-cell acute lymphoblastic leukemias (T-ALLs), 24% of acute myeloid leukemias, natural killer (NK) cells, and T cells.

The researchers created UCART7 by using CRISPR/Cas9 to delete CD7 and TRAC from allogeneic T cells and following this with lentiviral transduction with a third-generation CD7-CAR. The team found a way to delete both TRAC and CD7 in a single day with 95% efficiency, Dr. DiPersio noted.

“Knocking out CD7 doesn’t seem to have any impact on the expansion or trafficking of these T cells in vivo,” Dr. DiPersio said. “So we think that deleting that target in a normal T cell will not affect its overall ability to kill a target when we put a CAR into those T cells.”

In fact, the researchers’ experiments showed that UCART7 can kill T-ALL cells in vitro and target primary T-ALL in vivo without inducing GVHD (Leukemia. 2018 Sep;32[9]:1970-83.)
 

 

 

UCART2 and NT-I7

Dr. DiPersio and his colleagues have also tested UCART2, an allogeneic CAR T-cell therapy in which CD2 and TRAC are deleted. The therapy targets CD2 because this antigen is expressed on T-ALL and other T-cell and NK-cell malignancies. Experiments showed that UCART2 targets T-cell malignancies, including T-ALL and cutaneous T-cell lymphoma, in vitro.

The researchers also tested UCART2 in a mouse model of Sézary syndrome. In these experiments, UCART2 was combined with NT-I7.

NT-I7 enhanced the proliferation, persistence, and tumor killing ability of UCART2. Sézary mice that received UCART2 and NT-I7 had “virtually no tumor burden,” according to researchers, and survived longer than mice treated with UCART2 alone (Blood. 2018;132:340).

Dr. DiPersio noted that there was no cytokine release syndrome because these were immunodeficient mice. However, cytokine release syndrome may be a side effect of NT-I7 in patients as NT-I7 induces rapid expansion of CAR T cells.

Dr. DiPersio reported ownership and investment in WUGEN and Magenta Therapeutics. He also has relationships with Cellworks Group, Tioma Therapeutics, RiverVest Venture Partners, Bioline, Asterias Biotherapeutics, Amphivena Therapeutics, Bluebird Bio, Celgene, Incyte, NeoImuneTech, and MacroGenics.

The Acute Leukemia Forum is organized by Hemedicus, which is owned by the same company as this news organization.

NEWPORT BEACH, CALIF. – Preclinical research has revealed workarounds that may make chimeric antigen receptor (CAR) T-cell therapy feasible for patients with T-cell malignancies.

Researchers have found that using allogeneic cells for CAR T-cell therapy can eliminate contamination by malignant T cells, and editing those allogeneic T cells to delete the target antigen and the T-cell receptor alpha chain (TRAC) can prevent fratricide and graft-versus-host disease (GVHD).

Additionally, an interleukin-7 molecule called NT-I7 has been shown to enhance CAR T-cell proliferation, differentiation, and tumor killing in a mouse model of a T-cell malignancy.

John F. DiPersio, MD, PhD, of Washington University in St. Louis, described this work in a presentation at the Acute Leukemia Forum of Hemedicus.
 

Obstacles to development

“The primary obstacle for targeting T-cell malignancies with a T cell is that all of the targets that are on the [malignant] T cells are also expressed on the normal T cells,” Dr. DiPersio said. “So when you put a CAR into a normal T cell, it just kills itself. It’s called fratricide.”

A second issue that has limited development is that the phenotype of the malignant T cell in the blood is similar to a normal T cell, so they can’t be separated, he explained.

“So if you were to do anything to a normal T cell, you would also be doing it, in theory, to the malignant T cell – in theory, making it resistant to therapy,” he said.

A third obstacle, which has been seen in patients with B-cell malignancies as well, is the inability to harvest enough T cells to generate effective CAR T-cell therapy.

And a fourth obstacle is that T cells from patients with malignancies may not function normally because they have been exposed to prior therapies.

Dr. DiPersio and his colleagues believe these obstacles can be overcome by creating CAR T-cell therapies using T cells derived from healthy donors or cord blood, using gene editing to remove the target antigen and TRAC, and using NT-I7 to enhance the efficacy of these universal, “off-the-shelf” CAR T cells.

The researchers have tested these theories, and achieved successes, in preclinical models. The team is now planning a clinical trial in patients at Washington University. Dr. DiPersio and his colleagues also created a company called WUGEN that will develop the universal CAR T-cell therapies if the initial proof-of-principle trial proves successful.
 

UCART7

One of the universal CAR T-cell therapies Dr. DiPersio and his colleagues have tested is UCART7, which targets CD7. Dr. DiPersio noted that CD7 is expressed on 98% of T-cell acute lymphoblastic leukemias (T-ALLs), 24% of acute myeloid leukemias, natural killer (NK) cells, and T cells.

The researchers created UCART7 by using CRISPR/Cas9 to delete CD7 and TRAC from allogeneic T cells and following this with lentiviral transduction with a third-generation CD7-CAR. The team found a way to delete both TRAC and CD7 in a single day with 95% efficiency, Dr. DiPersio noted.

“Knocking out CD7 doesn’t seem to have any impact on the expansion or trafficking of these T cells in vivo,” Dr. DiPersio said. “So we think that deleting that target in a normal T cell will not affect its overall ability to kill a target when we put a CAR into those T cells.”

In fact, the researchers’ experiments showed that UCART7 can kill T-ALL cells in vitro and target primary T-ALL in vivo without inducing GVHD (Leukemia. 2018 Sep;32[9]:1970-83.)
 

 

 

UCART2 and NT-I7

Dr. DiPersio and his colleagues have also tested UCART2, an allogeneic CAR T-cell therapy in which CD2 and TRAC are deleted. The therapy targets CD2 because this antigen is expressed on T-ALL and other T-cell and NK-cell malignancies. Experiments showed that UCART2 targets T-cell malignancies, including T-ALL and cutaneous T-cell lymphoma, in vitro.

The researchers also tested UCART2 in a mouse model of Sézary syndrome. In these experiments, UCART2 was combined with NT-I7.

NT-I7 enhanced the proliferation, persistence, and tumor killing ability of UCART2. Sézary mice that received UCART2 and NT-I7 had “virtually no tumor burden,” according to researchers, and survived longer than mice treated with UCART2 alone (Blood. 2018;132:340).

Dr. DiPersio noted that there was no cytokine release syndrome because these were immunodeficient mice. However, cytokine release syndrome may be a side effect of NT-I7 in patients as NT-I7 induces rapid expansion of CAR T cells.

Dr. DiPersio reported ownership and investment in WUGEN and Magenta Therapeutics. He also has relationships with Cellworks Group, Tioma Therapeutics, RiverVest Venture Partners, Bioline, Asterias Biotherapeutics, Amphivena Therapeutics, Bluebird Bio, Celgene, Incyte, NeoImuneTech, and MacroGenics.

The Acute Leukemia Forum is organized by Hemedicus, which is owned by the same company as this news organization.

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