TBD Meeting (2976-20)

Combining a personalized cancer vaccine with an immune checkpoint inhibitor induced neoantigen-specific immune responses in most patients with advanced solid tumors in a phase 1b study.

Only two clinical responses were seen in this early investigation of the vaccine, RO7198457, combined with the PD-L1 inhibitor atezolizumab. However, T-cell responses were observed in about three-quarters of the patients evaluated, according to study investigator Juanita Lopez, MB BChir, PhD.

Those immune responses, coupled with preliminary evidence of infiltration of RO7198457-stimulated T cells into tumors, suggest the viability of this individualized anticancer strategy, according to Dr. Lopez, a consultant medical oncologist at The Royal Marsden NHS Foundation Trust and The Institute of Cancer Research, London.

“Failure of T-cell priming is a major cause of lack of response to immune checkpoint inhibitors,” Dr. Lopez said in an interview. “We hoped that, by eliciting a tumor-specific T-cell response, we would be able to overcome this.”

Preclinical data suggested the combination of vaccine and immune checkpoint inhibitors improved outcomes, which prompted the current study, added Dr. Lopez, who presented results from this study at the American Association for Cancer Research virtual meeting II.

Dr. Lopez noted that mutated neoantigens are recognized as foreign and have been shown to induce stronger T-cell responses, compared with shared antigens, likely because of a lack of central tolerance.

“Most of these mutated neoantigens are not shared between the patients, and therefore, targeted neoantigen-specific therapy requires an individualized approach,” she explained.

RO7198457 is manufactured on a per-patient basis and includes as many as 20 tumor-specific neoepitopes.
 

Study details

Dr. Lopez presented results from dose-escalation and expansion cohorts of the study, which included 142 patients with advanced solid tumors. The patients had colorectal, skin, kidney, lung, urothelial, breast, gynecologic, and head and neck cancers.

Most patients had low or no PD-L1 expression, and nearly 40% had received prior treatment with a checkpoint inhibitor.

Patients received nine doses of RO7198457 at 25-50 mcg during the 12-week induction stage. They then received RO7198457 every eight cycles until disease progression. Patients received atezolizumab at 1,200 mg on day 1 of each 21-day cycle.

Induction of proinflammatory cytokines was observed at each dose tested, and ex vivo T-cell responses were noted in 46 of 63 patients evaluated, or 73%.

T-cell receptors specific to RO7198457 were present posttreatment in a patient with rectal cancer, providing some preliminary evidence suggesting infiltration of RO7198457-stimulated T cells in the tumor, Dr. Lopez said.

There were two clinical responses. A patient with rectal cancer had a complete response, and a patient with triple-negative breast cancer had a partial response.

The combination of RO7198457 with atezolizumab was generally well tolerated, and the maximum tolerated dose was not reached, Dr. Lopez said. Most adverse events were grade 1/2, and immune-mediated adverse events were rare.
 

Implications and next steps

This study furthers earlier observations from neoantigen vaccine studies by linking dosing of the vaccine to dosing with immune checkpoint inhibitor, rather than giving the vaccine in the period leading up to immune checkpoint inhibitor administration, according to former AACR President Elaine R. Mardis, PhD, of Nationwide Children’s Hospital and The Ohio State University College of Medicine, both in Columbus.

That said, the implications for clinical practice remain unclear, according to Dr. Mardis.

“This combination did elicit an immune response that was highly specific for the neoantigen vaccine, but most patients did not receive a clinical benefit of disease response,” Dr. Mardis said in an interview. “This tells us the combination approach used was, overall, not quite right, and we need to continue to innovate in this area.”

The low clinical response rate in the study was likely caused in part by the fact that patients had very advanced disease and were heavily pretreated, according to Dr. Lopez

Randomized phase 2 studies of RO7198457 are now underway, Dr. Lopez said. One is a study of RO7198457 plus atezolizumab as adjuvant treatment for non–small cell lung cancer (NCT04267237). Another is testing RO7198457 in combination with pembrolizumab as first-line treatment for melanoma (NCT03815058).

The current study was funded by Genentech and BioNTech. Dr. Lopez reported disclosures related to Roche/Genentech, Basilea Pharmaceutica, and Genmab. Dr. Mardis reported disclosures related to Quiagen NV, PACT Pharma, Kiadis Pharma NV, and Interpreta.

SOURCE: Lopez J et al. AACR 2020, Abstract CT301.

Combining a personalized cancer vaccine with an immune checkpoint inhibitor induced neoantigen-specific immune responses in most patients with advanced solid tumors in a phase 1b study.

Only two clinical responses were seen in this early investigation of the vaccine, RO7198457, combined with the PD-L1 inhibitor atezolizumab. However, T-cell responses were observed in about three-quarters of the patients evaluated, according to study investigator Juanita Lopez, MB BChir, PhD.

Those immune responses, coupled with preliminary evidence of infiltration of RO7198457-stimulated T cells into tumors, suggest the viability of this individualized anticancer strategy, according to Dr. Lopez, a consultant medical oncologist at The Royal Marsden NHS Foundation Trust and The Institute of Cancer Research, London.

“Failure of T-cell priming is a major cause of lack of response to immune checkpoint inhibitors,” Dr. Lopez said in an interview. “We hoped that, by eliciting a tumor-specific T-cell response, we would be able to overcome this.”

Preclinical data suggested the combination of vaccine and immune checkpoint inhibitors improved outcomes, which prompted the current study, added Dr. Lopez, who presented results from this study at the American Association for Cancer Research virtual meeting II.

Dr. Lopez noted that mutated neoantigens are recognized as foreign and have been shown to induce stronger T-cell responses, compared with shared antigens, likely because of a lack of central tolerance.

“Most of these mutated neoantigens are not shared between the patients, and therefore, targeted neoantigen-specific therapy requires an individualized approach,” she explained.

RO7198457 is manufactured on a per-patient basis and includes as many as 20 tumor-specific neoepitopes.
 

Study details

Dr. Lopez presented results from dose-escalation and expansion cohorts of the study, which included 142 patients with advanced solid tumors. The patients had colorectal, skin, kidney, lung, urothelial, breast, gynecologic, and head and neck cancers.

Most patients had low or no PD-L1 expression, and nearly 40% had received prior treatment with a checkpoint inhibitor.

Patients received nine doses of RO7198457 at 25-50 mcg during the 12-week induction stage. They then received RO7198457 every eight cycles until disease progression. Patients received atezolizumab at 1,200 mg on day 1 of each 21-day cycle.

Induction of proinflammatory cytokines was observed at each dose tested, and ex vivo T-cell responses were noted in 46 of 63 patients evaluated, or 73%.

T-cell receptors specific to RO7198457 were present posttreatment in a patient with rectal cancer, providing some preliminary evidence suggesting infiltration of RO7198457-stimulated T cells in the tumor, Dr. Lopez said.

There were two clinical responses. A patient with rectal cancer had a complete response, and a patient with triple-negative breast cancer had a partial response.

The combination of RO7198457 with atezolizumab was generally well tolerated, and the maximum tolerated dose was not reached, Dr. Lopez said. Most adverse events were grade 1/2, and immune-mediated adverse events were rare.
 

Implications and next steps

This study furthers earlier observations from neoantigen vaccine studies by linking dosing of the vaccine to dosing with immune checkpoint inhibitor, rather than giving the vaccine in the period leading up to immune checkpoint inhibitor administration, according to former AACR President Elaine R. Mardis, PhD, of Nationwide Children’s Hospital and The Ohio State University College of Medicine, both in Columbus.

That said, the implications for clinical practice remain unclear, according to Dr. Mardis.

“This combination did elicit an immune response that was highly specific for the neoantigen vaccine, but most patients did not receive a clinical benefit of disease response,” Dr. Mardis said in an interview. “This tells us the combination approach used was, overall, not quite right, and we need to continue to innovate in this area.”

The low clinical response rate in the study was likely caused in part by the fact that patients had very advanced disease and were heavily pretreated, according to Dr. Lopez

Randomized phase 2 studies of RO7198457 are now underway, Dr. Lopez said. One is a study of RO7198457 plus atezolizumab as adjuvant treatment for non–small cell lung cancer (NCT04267237). Another is testing RO7198457 in combination with pembrolizumab as first-line treatment for melanoma (NCT03815058).

The current study was funded by Genentech and BioNTech. Dr. Lopez reported disclosures related to Roche/Genentech, Basilea Pharmaceutica, and Genmab. Dr. Mardis reported disclosures related to Quiagen NV, PACT Pharma, Kiadis Pharma NV, and Interpreta.

SOURCE: Lopez J et al. AACR 2020, Abstract CT301.

Combining a personalized cancer vaccine with an immune checkpoint inhibitor induced neoantigen-specific immune responses in most patients with advanced solid tumors in a phase 1b study.

Only two clinical responses were seen in this early investigation of the vaccine, RO7198457, combined with the PD-L1 inhibitor atezolizumab. However, T-cell responses were observed in about three-quarters of the patients evaluated, according to study investigator Juanita Lopez, MB BChir, PhD.

Those immune responses, coupled with preliminary evidence of infiltration of RO7198457-stimulated T cells into tumors, suggest the viability of this individualized anticancer strategy, according to Dr. Lopez, a consultant medical oncologist at The Royal Marsden NHS Foundation Trust and The Institute of Cancer Research, London.

“Failure of T-cell priming is a major cause of lack of response to immune checkpoint inhibitors,” Dr. Lopez said in an interview. “We hoped that, by eliciting a tumor-specific T-cell response, we would be able to overcome this.”

Preclinical data suggested the combination of vaccine and immune checkpoint inhibitors improved outcomes, which prompted the current study, added Dr. Lopez, who presented results from this study at the American Association for Cancer Research virtual meeting II.

Dr. Lopez noted that mutated neoantigens are recognized as foreign and have been shown to induce stronger T-cell responses, compared with shared antigens, likely because of a lack of central tolerance.

“Most of these mutated neoantigens are not shared between the patients, and therefore, targeted neoantigen-specific therapy requires an individualized approach,” she explained.

RO7198457 is manufactured on a per-patient basis and includes as many as 20 tumor-specific neoepitopes.
 

Study details

Dr. Lopez presented results from dose-escalation and expansion cohorts of the study, which included 142 patients with advanced solid tumors. The patients had colorectal, skin, kidney, lung, urothelial, breast, gynecologic, and head and neck cancers.

Most patients had low or no PD-L1 expression, and nearly 40% had received prior treatment with a checkpoint inhibitor.

Patients received nine doses of RO7198457 at 25-50 mcg during the 12-week induction stage. They then received RO7198457 every eight cycles until disease progression. Patients received atezolizumab at 1,200 mg on day 1 of each 21-day cycle.

Induction of proinflammatory cytokines was observed at each dose tested, and ex vivo T-cell responses were noted in 46 of 63 patients evaluated, or 73%.

T-cell receptors specific to RO7198457 were present posttreatment in a patient with rectal cancer, providing some preliminary evidence suggesting infiltration of RO7198457-stimulated T cells in the tumor, Dr. Lopez said.

There were two clinical responses. A patient with rectal cancer had a complete response, and a patient with triple-negative breast cancer had a partial response.

The combination of RO7198457 with atezolizumab was generally well tolerated, and the maximum tolerated dose was not reached, Dr. Lopez said. Most adverse events were grade 1/2, and immune-mediated adverse events were rare.
 

Implications and next steps

This study furthers earlier observations from neoantigen vaccine studies by linking dosing of the vaccine to dosing with immune checkpoint inhibitor, rather than giving the vaccine in the period leading up to immune checkpoint inhibitor administration, according to former AACR President Elaine R. Mardis, PhD, of Nationwide Children’s Hospital and The Ohio State University College of Medicine, both in Columbus.

That said, the implications for clinical practice remain unclear, according to Dr. Mardis.

“This combination did elicit an immune response that was highly specific for the neoantigen vaccine, but most patients did not receive a clinical benefit of disease response,” Dr. Mardis said in an interview. “This tells us the combination approach used was, overall, not quite right, and we need to continue to innovate in this area.”

The low clinical response rate in the study was likely caused in part by the fact that patients had very advanced disease and were heavily pretreated, according to Dr. Lopez

Randomized phase 2 studies of RO7198457 are now underway, Dr. Lopez said. One is a study of RO7198457 plus atezolizumab as adjuvant treatment for non–small cell lung cancer (NCT04267237). Another is testing RO7198457 in combination with pembrolizumab as first-line treatment for melanoma (NCT03815058).

The current study was funded by Genentech and BioNTech. Dr. Lopez reported disclosures related to Roche/Genentech, Basilea Pharmaceutica, and Genmab. Dr. Mardis reported disclosures related to Quiagen NV, PACT Pharma, Kiadis Pharma NV, and Interpreta.

SOURCE: Lopez J et al. AACR 2020, Abstract CT301.

Poziotinib, a pan-EGFR inhibitor, shrank tumors in a majority of patients with previously treated non–small cell lung cancer and EGFR exon 20 insertion mutations, but most of these patients did not achieve a response in the ongoing phase 2 ZENITH20 study.

The overall response rate (ORR) in the 115 patients was 14.8%, according to Xiuning Le, MD, PhD, of MD Anderson Cancer Center in Houston, who reported these results at the AACR virtual meeting I.

The ORR fell short of the greater than 17% required to meet the primary endpoint, but 65% of patients experienced tumor shrinkage, Dr. Le noted.

Overall, 17 patients had a confirmed partial response, 5 had an unconfirmed partial response, and 62 had stable disease, for a disease control rate of 68.7%.

Responses occurred early and were durable, Dr. Le said. The median duration of response was 7.4 months.

Responses were also consistent across subgroups based on the number of prior lines of therapy and prior EGFR tyrosine kinase inhibitor (TKI) therapy.

The median progression-free survival was 4.2 months.
 

Patients, treatment, and safety

The patients, who were enrolled in the first cohort of the ZENITH20 study, had a median age of 61 years. They had received a median of two prior therapies, with most having received both chemotherapy and immunotherapy.

Poziotinib was given at a once-daily dose of 16 mg for 28-day cycles, with follow-up of 24 months. Dose reductions were allowed for adverse events (AEs).

AEs were on target and consistent with EGFR TKI class effects. The most common AEs were rash, diarrhea, stomatitis, and paronychia.

Grade 3 AEs included rash (28%) and diarrhea (25%). No grade 5 treatment-related AEs occurred.

Dose reductions were common, occurring in 68% of patients. The median relative poziotinib dose intensity was 72%, suggesting that response can be maintained at lower dose levels, Dr. Le said.

Drug interruptions were also common, occurring in 88% of patients. Ten percent of patients discontinued treatment permanently, Dr. Le said, noting that this is consistent with findings in prior large trials of second-generation TKIs.
 

Implications

The results of this study are of note because EGFR is a known driver of NSCLC, Dr. Le said. She explained that, while effective treatments exist for more common EGFR mutations, such as the classic sensitizing exon 21 mutation L858R and exon 19 deletion, no approved targeted therapies are available for the approximately 10% of lung cancer patients whose tumors harbor EGFR exon 20 insertions.

“Those EGFR exon 20 insertions are not sensitive to most of the approved EGFR inhibitors,” Dr. Le said. She noted that, in one study, the median progression-free survival following treatment with an approved agent was 14 months in patients with classical mutations, compared with 2 months in those with exon 20 insertions.

The difference is attributable to molecular structural differences. Exon 20 insertions create a smaller and more shallow EGFR protein interaction surface, Dr. Le explained. “So some of the approved inhibitors don’t fit well into the oncogenic molecule,” she said.

Poziotinib has a small size and shape that can fit into the binding pocket of exon 20, and that, along with its mechanism of action, made it a promising candidate for this population, Dr. Le said. She referenced a study of 44 patients at MD Anderson Cancer Center in which poziotinib produced an ORR of 43%.

In the current study, “[p]oziotinib has further demonstrated clinical activity in previously treated lung cancer patients with EGFR exon 20 insertions ... with a toxicity profile similar to that of other second-generation TKIs,” she said.

The findings underscore the promise of EGFR exon 20 insertions as targets for therapeutic intervention, said invited discussant Taofeek Owonikoko, MD, PhD, of Winship Cancer Institute of Emory University in Atlanta.

“Poziotinib showed modest but meaningful efficacy,” he said. “However, its safety remains a challenge. It is expected that ongoing modifications in the dosing schedule will make it a more tolerable agent.”

“Future studies to systematically explore differential sensitivity of various exon 20 insertion mutations by location will be informative, as will [elucidation of] mechanisms of resistance to prioritize combinatorial strategies to further enhance the efficacy of this drug,” Dr. Owonikoko added.
 

Next steps

Analyses of other cohorts in the ZENITH20 trial will be reported at upcoming conferences as the data mature, Dr. Le noted. Cohorts 2-4 include patients with previously treated HER2 exon 20 insertions and treatment-naive patients with EGFR and HER2 exon 20 insertions, respectively.

Additionally, three new cohorts are being added, including one with patients who have EGFR or HER2 exon 20 insertions, one with EGFR patients who failed prior osimertinib treatment, and one with patients who have atypical EGFR or HER2 mutations.

Rather than the once-daily dosing used in cohorts 1-4, twice-daily dosing will be evaluated in these cohorts, Dr. Le said, explaining that the half-life of poziotinib is about 8 hours.

“Recent pharmacological modeling showed that a [twice-daily] regimen would reduce the maximal serum concentration and increase trough, which could lead to optimized drug coverage,” she said. “This may potentially reduce toxicity and improve patient compliance and efficacy.”

ZENITH20 is sponsored by Spectrum Pharmaceuticals Inc. Dr. Le disclosed relationships with Spectrum as well as Eli Lilly, AstraZeneca, EMD Serono, and Boehringer Ingelheim. Dr. Owonikoko disclosed relationships with many companies, not including Spectrum.

sworcester@mdedge.com

SOURCE: Le X et al. AACR 2020, Abstract CT081.

Poziotinib, a pan-EGFR inhibitor, shrank tumors in a majority of patients with previously treated non–small cell lung cancer and EGFR exon 20 insertion mutations, but most of these patients did not achieve a response in the ongoing phase 2 ZENITH20 study.

The overall response rate (ORR) in the 115 patients was 14.8%, according to Xiuning Le, MD, PhD, of MD Anderson Cancer Center in Houston, who reported these results at the AACR virtual meeting I.

The ORR fell short of the greater than 17% required to meet the primary endpoint, but 65% of patients experienced tumor shrinkage, Dr. Le noted.

Overall, 17 patients had a confirmed partial response, 5 had an unconfirmed partial response, and 62 had stable disease, for a disease control rate of 68.7%.

Responses occurred early and were durable, Dr. Le said. The median duration of response was 7.4 months.

Responses were also consistent across subgroups based on the number of prior lines of therapy and prior EGFR tyrosine kinase inhibitor (TKI) therapy.

The median progression-free survival was 4.2 months.
 

Patients, treatment, and safety

The patients, who were enrolled in the first cohort of the ZENITH20 study, had a median age of 61 years. They had received a median of two prior therapies, with most having received both chemotherapy and immunotherapy.

Poziotinib was given at a once-daily dose of 16 mg for 28-day cycles, with follow-up of 24 months. Dose reductions were allowed for adverse events (AEs).

AEs were on target and consistent with EGFR TKI class effects. The most common AEs were rash, diarrhea, stomatitis, and paronychia.

Grade 3 AEs included rash (28%) and diarrhea (25%). No grade 5 treatment-related AEs occurred.

Dose reductions were common, occurring in 68% of patients. The median relative poziotinib dose intensity was 72%, suggesting that response can be maintained at lower dose levels, Dr. Le said.

Drug interruptions were also common, occurring in 88% of patients. Ten percent of patients discontinued treatment permanently, Dr. Le said, noting that this is consistent with findings in prior large trials of second-generation TKIs.
 

Implications

The results of this study are of note because EGFR is a known driver of NSCLC, Dr. Le said. She explained that, while effective treatments exist for more common EGFR mutations, such as the classic sensitizing exon 21 mutation L858R and exon 19 deletion, no approved targeted therapies are available for the approximately 10% of lung cancer patients whose tumors harbor EGFR exon 20 insertions.

“Those EGFR exon 20 insertions are not sensitive to most of the approved EGFR inhibitors,” Dr. Le said. She noted that, in one study, the median progression-free survival following treatment with an approved agent was 14 months in patients with classical mutations, compared with 2 months in those with exon 20 insertions.

The difference is attributable to molecular structural differences. Exon 20 insertions create a smaller and more shallow EGFR protein interaction surface, Dr. Le explained. “So some of the approved inhibitors don’t fit well into the oncogenic molecule,” she said.

Poziotinib has a small size and shape that can fit into the binding pocket of exon 20, and that, along with its mechanism of action, made it a promising candidate for this population, Dr. Le said. She referenced a study of 44 patients at MD Anderson Cancer Center in which poziotinib produced an ORR of 43%.

In the current study, “[p]oziotinib has further demonstrated clinical activity in previously treated lung cancer patients with EGFR exon 20 insertions ... with a toxicity profile similar to that of other second-generation TKIs,” she said.

The findings underscore the promise of EGFR exon 20 insertions as targets for therapeutic intervention, said invited discussant Taofeek Owonikoko, MD, PhD, of Winship Cancer Institute of Emory University in Atlanta.

“Poziotinib showed modest but meaningful efficacy,” he said. “However, its safety remains a challenge. It is expected that ongoing modifications in the dosing schedule will make it a more tolerable agent.”

“Future studies to systematically explore differential sensitivity of various exon 20 insertion mutations by location will be informative, as will [elucidation of] mechanisms of resistance to prioritize combinatorial strategies to further enhance the efficacy of this drug,” Dr. Owonikoko added.
 

Next steps

Analyses of other cohorts in the ZENITH20 trial will be reported at upcoming conferences as the data mature, Dr. Le noted. Cohorts 2-4 include patients with previously treated HER2 exon 20 insertions and treatment-naive patients with EGFR and HER2 exon 20 insertions, respectively.

Additionally, three new cohorts are being added, including one with patients who have EGFR or HER2 exon 20 insertions, one with EGFR patients who failed prior osimertinib treatment, and one with patients who have atypical EGFR or HER2 mutations.

Rather than the once-daily dosing used in cohorts 1-4, twice-daily dosing will be evaluated in these cohorts, Dr. Le said, explaining that the half-life of poziotinib is about 8 hours.

“Recent pharmacological modeling showed that a [twice-daily] regimen would reduce the maximal serum concentration and increase trough, which could lead to optimized drug coverage,” she said. “This may potentially reduce toxicity and improve patient compliance and efficacy.”

ZENITH20 is sponsored by Spectrum Pharmaceuticals Inc. Dr. Le disclosed relationships with Spectrum as well as Eli Lilly, AstraZeneca, EMD Serono, and Boehringer Ingelheim. Dr. Owonikoko disclosed relationships with many companies, not including Spectrum.

sworcester@mdedge.com

SOURCE: Le X et al. AACR 2020, Abstract CT081.

Poziotinib, a pan-EGFR inhibitor, shrank tumors in a majority of patients with previously treated non–small cell lung cancer and EGFR exon 20 insertion mutations, but most of these patients did not achieve a response in the ongoing phase 2 ZENITH20 study.

The overall response rate (ORR) in the 115 patients was 14.8%, according to Xiuning Le, MD, PhD, of MD Anderson Cancer Center in Houston, who reported these results at the AACR virtual meeting I.

The ORR fell short of the greater than 17% required to meet the primary endpoint, but 65% of patients experienced tumor shrinkage, Dr. Le noted.

Overall, 17 patients had a confirmed partial response, 5 had an unconfirmed partial response, and 62 had stable disease, for a disease control rate of 68.7%.

Responses occurred early and were durable, Dr. Le said. The median duration of response was 7.4 months.

Responses were also consistent across subgroups based on the number of prior lines of therapy and prior EGFR tyrosine kinase inhibitor (TKI) therapy.

The median progression-free survival was 4.2 months.
 

Patients, treatment, and safety

The patients, who were enrolled in the first cohort of the ZENITH20 study, had a median age of 61 years. They had received a median of two prior therapies, with most having received both chemotherapy and immunotherapy.

Poziotinib was given at a once-daily dose of 16 mg for 28-day cycles, with follow-up of 24 months. Dose reductions were allowed for adverse events (AEs).

AEs were on target and consistent with EGFR TKI class effects. The most common AEs were rash, diarrhea, stomatitis, and paronychia.

Grade 3 AEs included rash (28%) and diarrhea (25%). No grade 5 treatment-related AEs occurred.

Dose reductions were common, occurring in 68% of patients. The median relative poziotinib dose intensity was 72%, suggesting that response can be maintained at lower dose levels, Dr. Le said.

Drug interruptions were also common, occurring in 88% of patients. Ten percent of patients discontinued treatment permanently, Dr. Le said, noting that this is consistent with findings in prior large trials of second-generation TKIs.
 

Implications

The results of this study are of note because EGFR is a known driver of NSCLC, Dr. Le said. She explained that, while effective treatments exist for more common EGFR mutations, such as the classic sensitizing exon 21 mutation L858R and exon 19 deletion, no approved targeted therapies are available for the approximately 10% of lung cancer patients whose tumors harbor EGFR exon 20 insertions.

“Those EGFR exon 20 insertions are not sensitive to most of the approved EGFR inhibitors,” Dr. Le said. She noted that, in one study, the median progression-free survival following treatment with an approved agent was 14 months in patients with classical mutations, compared with 2 months in those with exon 20 insertions.

The difference is attributable to molecular structural differences. Exon 20 insertions create a smaller and more shallow EGFR protein interaction surface, Dr. Le explained. “So some of the approved inhibitors don’t fit well into the oncogenic molecule,” she said.

Poziotinib has a small size and shape that can fit into the binding pocket of exon 20, and that, along with its mechanism of action, made it a promising candidate for this population, Dr. Le said. She referenced a study of 44 patients at MD Anderson Cancer Center in which poziotinib produced an ORR of 43%.

In the current study, “[p]oziotinib has further demonstrated clinical activity in previously treated lung cancer patients with EGFR exon 20 insertions ... with a toxicity profile similar to that of other second-generation TKIs,” she said.

The findings underscore the promise of EGFR exon 20 insertions as targets for therapeutic intervention, said invited discussant Taofeek Owonikoko, MD, PhD, of Winship Cancer Institute of Emory University in Atlanta.

“Poziotinib showed modest but meaningful efficacy,” he said. “However, its safety remains a challenge. It is expected that ongoing modifications in the dosing schedule will make it a more tolerable agent.”

“Future studies to systematically explore differential sensitivity of various exon 20 insertion mutations by location will be informative, as will [elucidation of] mechanisms of resistance to prioritize combinatorial strategies to further enhance the efficacy of this drug,” Dr. Owonikoko added.
 

Next steps

Analyses of other cohorts in the ZENITH20 trial will be reported at upcoming conferences as the data mature, Dr. Le noted. Cohorts 2-4 include patients with previously treated HER2 exon 20 insertions and treatment-naive patients with EGFR and HER2 exon 20 insertions, respectively.

Additionally, three new cohorts are being added, including one with patients who have EGFR or HER2 exon 20 insertions, one with EGFR patients who failed prior osimertinib treatment, and one with patients who have atypical EGFR or HER2 mutations.

Rather than the once-daily dosing used in cohorts 1-4, twice-daily dosing will be evaluated in these cohorts, Dr. Le said, explaining that the half-life of poziotinib is about 8 hours.

“Recent pharmacological modeling showed that a [twice-daily] regimen would reduce the maximal serum concentration and increase trough, which could lead to optimized drug coverage,” she said. “This may potentially reduce toxicity and improve patient compliance and efficacy.”

ZENITH20 is sponsored by Spectrum Pharmaceuticals Inc. Dr. Le disclosed relationships with Spectrum as well as Eli Lilly, AstraZeneca, EMD Serono, and Boehringer Ingelheim. Dr. Owonikoko disclosed relationships with many companies, not including Spectrum.

sworcester@mdedge.com

SOURCE: Le X et al. AACR 2020, Abstract CT081.

A novel penclomedine shows promising safety and efficacy in some adolescent and young adult patients with cancers involving the central nervous system, according to phase 1/2 clinical trial findings.

The trial included 15 patients, aged 15-39 years, with measurable cancer involving the CNS who were treated with the agent 4-Demethyl-4-cholesteryloxycarbonylpenclomedine (DM-CHOC-PEN).

Two of these patients were “in their 59th month of survival and doing well” as of April, when the data were presented at the AACR virtual meeting I.

One of the patients with long-term survival benefit had non–small cell lung cancer, and one had astrocytoma, Lee Roy Morgan, MD, PhD, chief executive officer of Dekk-Tec Inc., New Orleans, reported during a poster presentation.

Patients with glioblastoma, however, “did not do well,” said Dr. Morgan, an adjunct professor at Tulane University in New Orleans. He noted that none of the five glioblastoma patients experienced a long-term response.
 

Safety

Study subjects were treated with the maximum tolerated dose (MTD) of DM-CHOC-PEN as identified in an earlier study. Patients with liver involvement received 75 mg/m², and those without liver involvement received up to 98.7 mg/m². Dosing was by 3-hour intravenous administration once every 21 days as lab tests and subject status allowed.

DM-CHOC-PEN was generally well tolerated. One patient experienced grade 2 vasogenic edema, and another experienced seizures. Both were secondary to tumor swelling, and both resolved with tumor regression.

No grade 3 toxicities occurred at the MTD, and “no renal, hematological, hepatic, or pulmonary toxicities were noted using the MTD in this trial,” Dr. Morgan said.
 

Mechanism

DM-CHOC-PEN is a polychlorinated pyridine with a cholesteryl carbonate attachment that induces lipophilicity, which potentiates the drug’s penetration of the blood-brain barrier and its entry into the brain and brain cancers, Dr. Morgan explained.

He added that DM-CHOC-PEN is a bis-alkylator that binds to DNA’s cytosine/guanine nucleotides. The agent does not require hepatic activation, it crosses the blood-brain barrier intact, and accumulates in CNS tumors but not normal CNS tissue, he said.

Further, it “is not a substrate for [p-glycoprotein] transport; thus, it doesn’t easily get out of the brain,” Dr. Morgan said. He noted that DM-CHOC-PEN can be used with other agents, such as temozolomide and bis-chloroethylnitrosourea, because of the difference in mechanisms of action.

This study was supported by Louisiana state grants, the National Cancer Institute, the National Institute of General Medical Sciences, and the Small Business Innovation Research program. Dr. Morgan reported having no disclosures, but he is chief executive officer of Dekk-Tec Inc., which is developing DM-CHOC-PEN.

sworcester@mdedge.com

SOURCE: Morgan L et al. AACR 2020, Abstract CT181.

A novel penclomedine shows promising safety and efficacy in some adolescent and young adult patients with cancers involving the central nervous system, according to phase 1/2 clinical trial findings.

The trial included 15 patients, aged 15-39 years, with measurable cancer involving the CNS who were treated with the agent 4-Demethyl-4-cholesteryloxycarbonylpenclomedine (DM-CHOC-PEN).

Two of these patients were “in their 59th month of survival and doing well” as of April, when the data were presented at the AACR virtual meeting I.

One of the patients with long-term survival benefit had non–small cell lung cancer, and one had astrocytoma, Lee Roy Morgan, MD, PhD, chief executive officer of Dekk-Tec Inc., New Orleans, reported during a poster presentation.

Patients with glioblastoma, however, “did not do well,” said Dr. Morgan, an adjunct professor at Tulane University in New Orleans. He noted that none of the five glioblastoma patients experienced a long-term response.
 

Safety

Study subjects were treated with the maximum tolerated dose (MTD) of DM-CHOC-PEN as identified in an earlier study. Patients with liver involvement received 75 mg/m², and those without liver involvement received up to 98.7 mg/m². Dosing was by 3-hour intravenous administration once every 21 days as lab tests and subject status allowed.

DM-CHOC-PEN was generally well tolerated. One patient experienced grade 2 vasogenic edema, and another experienced seizures. Both were secondary to tumor swelling, and both resolved with tumor regression.

No grade 3 toxicities occurred at the MTD, and “no renal, hematological, hepatic, or pulmonary toxicities were noted using the MTD in this trial,” Dr. Morgan said.
 

Mechanism

DM-CHOC-PEN is a polychlorinated pyridine with a cholesteryl carbonate attachment that induces lipophilicity, which potentiates the drug’s penetration of the blood-brain barrier and its entry into the brain and brain cancers, Dr. Morgan explained.

He added that DM-CHOC-PEN is a bis-alkylator that binds to DNA’s cytosine/guanine nucleotides. The agent does not require hepatic activation, it crosses the blood-brain barrier intact, and accumulates in CNS tumors but not normal CNS tissue, he said.

Further, it “is not a substrate for [p-glycoprotein] transport; thus, it doesn’t easily get out of the brain,” Dr. Morgan said. He noted that DM-CHOC-PEN can be used with other agents, such as temozolomide and bis-chloroethylnitrosourea, because of the difference in mechanisms of action.

This study was supported by Louisiana state grants, the National Cancer Institute, the National Institute of General Medical Sciences, and the Small Business Innovation Research program. Dr. Morgan reported having no disclosures, but he is chief executive officer of Dekk-Tec Inc., which is developing DM-CHOC-PEN.

sworcester@mdedge.com

SOURCE: Morgan L et al. AACR 2020, Abstract CT181.

A novel penclomedine shows promising safety and efficacy in some adolescent and young adult patients with cancers involving the central nervous system, according to phase 1/2 clinical trial findings.

The trial included 15 patients, aged 15-39 years, with measurable cancer involving the CNS who were treated with the agent 4-Demethyl-4-cholesteryloxycarbonylpenclomedine (DM-CHOC-PEN).

Two of these patients were “in their 59th month of survival and doing well” as of April, when the data were presented at the AACR virtual meeting I.

One of the patients with long-term survival benefit had non–small cell lung cancer, and one had astrocytoma, Lee Roy Morgan, MD, PhD, chief executive officer of Dekk-Tec Inc., New Orleans, reported during a poster presentation.

Patients with glioblastoma, however, “did not do well,” said Dr. Morgan, an adjunct professor at Tulane University in New Orleans. He noted that none of the five glioblastoma patients experienced a long-term response.
 

Safety

Study subjects were treated with the maximum tolerated dose (MTD) of DM-CHOC-PEN as identified in an earlier study. Patients with liver involvement received 75 mg/m², and those without liver involvement received up to 98.7 mg/m². Dosing was by 3-hour intravenous administration once every 21 days as lab tests and subject status allowed.

DM-CHOC-PEN was generally well tolerated. One patient experienced grade 2 vasogenic edema, and another experienced seizures. Both were secondary to tumor swelling, and both resolved with tumor regression.

No grade 3 toxicities occurred at the MTD, and “no renal, hematological, hepatic, or pulmonary toxicities were noted using the MTD in this trial,” Dr. Morgan said.
 

Mechanism

DM-CHOC-PEN is a polychlorinated pyridine with a cholesteryl carbonate attachment that induces lipophilicity, which potentiates the drug’s penetration of the blood-brain barrier and its entry into the brain and brain cancers, Dr. Morgan explained.

He added that DM-CHOC-PEN is a bis-alkylator that binds to DNA’s cytosine/guanine nucleotides. The agent does not require hepatic activation, it crosses the blood-brain barrier intact, and accumulates in CNS tumors but not normal CNS tissue, he said.

Further, it “is not a substrate for [p-glycoprotein] transport; thus, it doesn’t easily get out of the brain,” Dr. Morgan said. He noted that DM-CHOC-PEN can be used with other agents, such as temozolomide and bis-chloroethylnitrosourea, because of the difference in mechanisms of action.

This study was supported by Louisiana state grants, the National Cancer Institute, the National Institute of General Medical Sciences, and the Small Business Innovation Research program. Dr. Morgan reported having no disclosures, but he is chief executive officer of Dekk-Tec Inc., which is developing DM-CHOC-PEN.

sworcester@mdedge.com

SOURCE: Morgan L et al. AACR 2020, Abstract CT181.

A universal chimeric antigen receptor (CAR) T-cell therapy produced responses in adults with relapsed or refractory T-cell acute lymphoblastic leukemia (T-ALL), according to initial findings from an ongoing study.

The first five patients enrolled in this first-in-human study received conditioning and an infusion of the premanufactured CD7-targeted CAR T-cell therapy, TruUCAR GC027.

All five patients achieved a complete remission (CR) or CR with incomplete count recovery (CRi), although one patient had a morphological relapse at 1 month.

Xinxin Wang, PhD, reported these results at the AACR Virtual Meeting I. Dr. Wang is employed by Gracell Biotechnologies in Shanghai, China, which is the company developing TruUCAR GC027.

The CAR T-cell therapy is manufactured using lentivirus and leukopaks from HLA-mismatched healthy donors, according to Dr. Wang. TruUCAR GC027 contains second-generation CAR T cells with genomic disruption of TCR-alpha and CD7 to help prevent graft-versus-host disease and fratricide.

TruUCAR GC027 was previously shown to expand and have antileukemic activity in a murine model, Dr. Wang noted.
 

Patients and treatment

The five patients in the phase 1 study had a median age of 24 years (range, 19 to 38 years). They had heavily pretreated T-ALL, with a median of 5 prior lines of therapy (range, 1-9). Baseline bone marrow tumor burden ranged from 4% to 80.2% (median, 38.2%).

None of the patients received prior allogeneic hematopoietic stem cell transplant.

All patients received a preconditioning chemotherapy regimen. One patient received TruUCAR GC027 at dose level 1 (6 x 10⁶ cells/kg), three patients received dose level 2 (1 x 10⁷ cells/kg), and one patient received dose level 3 (1.5 x 10⁷ cells/kg) – each as a single infusion.
 

Expansion, response, and safety

“GC027 expansion, analyzed by flow [cytometry] was observed in most of the patients treated,” Dr. Wang said. “We started to see GC027 in the peripheral blood as early as day 5, with peaks around day 7-14.”

All five patients had a CR or CRi at the first postinfusion evaluation, which occurred at day 14 in four of the five patients. Four patients also achieved minimum residual disease (MRD) negativity by 1 month of follow-up and remained in MRD-negative CR at the February 6, 2020, data cutoff.

One patient achieved MRD-positive CR at day 14 but experienced morphological relapse at 1 month.

In the four patients with MRD-negative CR at 1 month, cellular expansion was observed as early as day 5 and continued for 2 weeks, but the patient who relapsed at day 29 showed no cellular expansion on flow cytometry, Dr. Wang said.

However, by a more sensitive quantitative polymerase chain reaction analysis, cellular expansion was observed in all five patients starting as early as day 1 after infusion, although the patient who relapsed had the shortest duration of expansion.

All patients developed cytokine release syndrome (CRS). Four patients experienced grade 3 CRS, and one experienced grade 4 CRS.

“The CRS was manageable and reversible,” Dr. Wang said, adding that none of the patients experienced neurotoxicity or graft-versus-host disease.

Prolonged cytopenia occurred in four patients, including one grade 1 case, two grade 3 cases, and one grade 4 case. Grade 3 pulmonary infections occurred in three patients, and grade 3 neutropenia occurred in all five patients.
 

‘Very impressive’ early results

Dr. Wang said the responses observed in this trial are notable because T-ALL constitutes 20%-25% of all adult ALL and 12%-15% of all pediatric ALL. T-ALL is highly aggressive, with event-free and overall survival of less than 25% in the relapsed setting. Dr. Wang noted that, despite the high unmet medical need and lack of treatment options for T-ALL, the development of novel immunotherapies has lagged.

One challenge is that T-ALL and normal T cells share common surface antigens, so targeted therapies for T-ALL will also target normal T cells. Another challenge is the potential contamination by malignant cells in autologous T-cell products, Dr. Wang said, noting that this can be avoided with universal CAR T cells.

Further, CD7 is a good target for T-ALL because it is expressed in more than 95% of T-ALL patients, she added.

“[TruUCAR GC027] demonstrated a very promising early response rate ... and showed a manageable toxicity profile at all three dose levels,” Dr. Wang said in closing, noting that further evaluation is warranted.

Indeed, the results of this next-generation CAR T-cell trial are “very impressive,” said invited discussant Yvonne Y. Chen, PhD, of the University of California, Los Angeles.

There have been concerns that “off-the-shelf” CAR T-cell products like TruUCAR GC027 might be limited by factors such as a reduced level of CAR T-cell persistence and therefore reduced efficacy leading to a need for repeat dosing, Dr. Chen noted. However, Dr. Wang and her colleagues showed a 100% CR/CRi rate with a single dose of CAR T cells and without graft-versus-host disease or neurotoxicity, Dr. Chen emphasized.

“I think it’s also important to note, however, that there’s quite a high incidence rate of grade 3 or higher toxicities, including CRS,” Dr. Chen said. “I suspect this may have something to do with the fairly high dosing levels used in this trial.”

The “big question,” however, is durability of the response, Dr. Chen said. “And this is something that the field will really watch as this trial progresses beyond the 7-month monitoring period ... reported today.”

Dr. Wang is an employee of Gracell Biotechnologies. Dr. Chen is cofounder of Kalthera Therapeutics and a scientific adviser for Gritstone Oncology and Notch Therapeutics.

sworcester@mdedge.com

SOURCE: Wang X et al. AACR 2020, Abstract CT052.

A universal chimeric antigen receptor (CAR) T-cell therapy produced responses in adults with relapsed or refractory T-cell acute lymphoblastic leukemia (T-ALL), according to initial findings from an ongoing study.

The first five patients enrolled in this first-in-human study received conditioning and an infusion of the premanufactured CD7-targeted CAR T-cell therapy, TruUCAR GC027.

All five patients achieved a complete remission (CR) or CR with incomplete count recovery (CRi), although one patient had a morphological relapse at 1 month.

Xinxin Wang, PhD, reported these results at the AACR Virtual Meeting I. Dr. Wang is employed by Gracell Biotechnologies in Shanghai, China, which is the company developing TruUCAR GC027.

The CAR T-cell therapy is manufactured using lentivirus and leukopaks from HLA-mismatched healthy donors, according to Dr. Wang. TruUCAR GC027 contains second-generation CAR T cells with genomic disruption of TCR-alpha and CD7 to help prevent graft-versus-host disease and fratricide.

TruUCAR GC027 was previously shown to expand and have antileukemic activity in a murine model, Dr. Wang noted.
 

Patients and treatment

The five patients in the phase 1 study had a median age of 24 years (range, 19 to 38 years). They had heavily pretreated T-ALL, with a median of 5 prior lines of therapy (range, 1-9). Baseline bone marrow tumor burden ranged from 4% to 80.2% (median, 38.2%).

None of the patients received prior allogeneic hematopoietic stem cell transplant.

All patients received a preconditioning chemotherapy regimen. One patient received TruUCAR GC027 at dose level 1 (6 x 10⁶ cells/kg), three patients received dose level 2 (1 x 10⁷ cells/kg), and one patient received dose level 3 (1.5 x 10⁷ cells/kg) – each as a single infusion.
 

Expansion, response, and safety

“GC027 expansion, analyzed by flow [cytometry] was observed in most of the patients treated,” Dr. Wang said. “We started to see GC027 in the peripheral blood as early as day 5, with peaks around day 7-14.”

All five patients had a CR or CRi at the first postinfusion evaluation, which occurred at day 14 in four of the five patients. Four patients also achieved minimum residual disease (MRD) negativity by 1 month of follow-up and remained in MRD-negative CR at the February 6, 2020, data cutoff.

One patient achieved MRD-positive CR at day 14 but experienced morphological relapse at 1 month.

In the four patients with MRD-negative CR at 1 month, cellular expansion was observed as early as day 5 and continued for 2 weeks, but the patient who relapsed at day 29 showed no cellular expansion on flow cytometry, Dr. Wang said.

However, by a more sensitive quantitative polymerase chain reaction analysis, cellular expansion was observed in all five patients starting as early as day 1 after infusion, although the patient who relapsed had the shortest duration of expansion.

All patients developed cytokine release syndrome (CRS). Four patients experienced grade 3 CRS, and one experienced grade 4 CRS.

“The CRS was manageable and reversible,” Dr. Wang said, adding that none of the patients experienced neurotoxicity or graft-versus-host disease.

Prolonged cytopenia occurred in four patients, including one grade 1 case, two grade 3 cases, and one grade 4 case. Grade 3 pulmonary infections occurred in three patients, and grade 3 neutropenia occurred in all five patients.
 

‘Very impressive’ early results

Dr. Wang said the responses observed in this trial are notable because T-ALL constitutes 20%-25% of all adult ALL and 12%-15% of all pediatric ALL. T-ALL is highly aggressive, with event-free and overall survival of less than 25% in the relapsed setting. Dr. Wang noted that, despite the high unmet medical need and lack of treatment options for T-ALL, the development of novel immunotherapies has lagged.

One challenge is that T-ALL and normal T cells share common surface antigens, so targeted therapies for T-ALL will also target normal T cells. Another challenge is the potential contamination by malignant cells in autologous T-cell products, Dr. Wang said, noting that this can be avoided with universal CAR T cells.

Further, CD7 is a good target for T-ALL because it is expressed in more than 95% of T-ALL patients, she added.

“[TruUCAR GC027] demonstrated a very promising early response rate ... and showed a manageable toxicity profile at all three dose levels,” Dr. Wang said in closing, noting that further evaluation is warranted.

Indeed, the results of this next-generation CAR T-cell trial are “very impressive,” said invited discussant Yvonne Y. Chen, PhD, of the University of California, Los Angeles.

There have been concerns that “off-the-shelf” CAR T-cell products like TruUCAR GC027 might be limited by factors such as a reduced level of CAR T-cell persistence and therefore reduced efficacy leading to a need for repeat dosing, Dr. Chen noted. However, Dr. Wang and her colleagues showed a 100% CR/CRi rate with a single dose of CAR T cells and without graft-versus-host disease or neurotoxicity, Dr. Chen emphasized.

“I think it’s also important to note, however, that there’s quite a high incidence rate of grade 3 or higher toxicities, including CRS,” Dr. Chen said. “I suspect this may have something to do with the fairly high dosing levels used in this trial.”

The “big question,” however, is durability of the response, Dr. Chen said. “And this is something that the field will really watch as this trial progresses beyond the 7-month monitoring period ... reported today.”

Dr. Wang is an employee of Gracell Biotechnologies. Dr. Chen is cofounder of Kalthera Therapeutics and a scientific adviser for Gritstone Oncology and Notch Therapeutics.

sworcester@mdedge.com

SOURCE: Wang X et al. AACR 2020, Abstract CT052.

A universal chimeric antigen receptor (CAR) T-cell therapy produced responses in adults with relapsed or refractory T-cell acute lymphoblastic leukemia (T-ALL), according to initial findings from an ongoing study.

The first five patients enrolled in this first-in-human study received conditioning and an infusion of the premanufactured CD7-targeted CAR T-cell therapy, TruUCAR GC027.

All five patients achieved a complete remission (CR) or CR with incomplete count recovery (CRi), although one patient had a morphological relapse at 1 month.

Xinxin Wang, PhD, reported these results at the AACR Virtual Meeting I. Dr. Wang is employed by Gracell Biotechnologies in Shanghai, China, which is the company developing TruUCAR GC027.

The CAR T-cell therapy is manufactured using lentivirus and leukopaks from HLA-mismatched healthy donors, according to Dr. Wang. TruUCAR GC027 contains second-generation CAR T cells with genomic disruption of TCR-alpha and CD7 to help prevent graft-versus-host disease and fratricide.

TruUCAR GC027 was previously shown to expand and have antileukemic activity in a murine model, Dr. Wang noted.
 

Patients and treatment

The five patients in the phase 1 study had a median age of 24 years (range, 19 to 38 years). They had heavily pretreated T-ALL, with a median of 5 prior lines of therapy (range, 1-9). Baseline bone marrow tumor burden ranged from 4% to 80.2% (median, 38.2%).

None of the patients received prior allogeneic hematopoietic stem cell transplant.

All patients received a preconditioning chemotherapy regimen. One patient received TruUCAR GC027 at dose level 1 (6 x 10⁶ cells/kg), three patients received dose level 2 (1 x 10⁷ cells/kg), and one patient received dose level 3 (1.5 x 10⁷ cells/kg) – each as a single infusion.
 

Expansion, response, and safety

“GC027 expansion, analyzed by flow [cytometry] was observed in most of the patients treated,” Dr. Wang said. “We started to see GC027 in the peripheral blood as early as day 5, with peaks around day 7-14.”

All five patients had a CR or CRi at the first postinfusion evaluation, which occurred at day 14 in four of the five patients. Four patients also achieved minimum residual disease (MRD) negativity by 1 month of follow-up and remained in MRD-negative CR at the February 6, 2020, data cutoff.

One patient achieved MRD-positive CR at day 14 but experienced morphological relapse at 1 month.

In the four patients with MRD-negative CR at 1 month, cellular expansion was observed as early as day 5 and continued for 2 weeks, but the patient who relapsed at day 29 showed no cellular expansion on flow cytometry, Dr. Wang said.

However, by a more sensitive quantitative polymerase chain reaction analysis, cellular expansion was observed in all five patients starting as early as day 1 after infusion, although the patient who relapsed had the shortest duration of expansion.

All patients developed cytokine release syndrome (CRS). Four patients experienced grade 3 CRS, and one experienced grade 4 CRS.

“The CRS was manageable and reversible,” Dr. Wang said, adding that none of the patients experienced neurotoxicity or graft-versus-host disease.

Prolonged cytopenia occurred in four patients, including one grade 1 case, two grade 3 cases, and one grade 4 case. Grade 3 pulmonary infections occurred in three patients, and grade 3 neutropenia occurred in all five patients.
 

‘Very impressive’ early results

Dr. Wang said the responses observed in this trial are notable because T-ALL constitutes 20%-25% of all adult ALL and 12%-15% of all pediatric ALL. T-ALL is highly aggressive, with event-free and overall survival of less than 25% in the relapsed setting. Dr. Wang noted that, despite the high unmet medical need and lack of treatment options for T-ALL, the development of novel immunotherapies has lagged.

One challenge is that T-ALL and normal T cells share common surface antigens, so targeted therapies for T-ALL will also target normal T cells. Another challenge is the potential contamination by malignant cells in autologous T-cell products, Dr. Wang said, noting that this can be avoided with universal CAR T cells.

Further, CD7 is a good target for T-ALL because it is expressed in more than 95% of T-ALL patients, she added.

“[TruUCAR GC027] demonstrated a very promising early response rate ... and showed a manageable toxicity profile at all three dose levels,” Dr. Wang said in closing, noting that further evaluation is warranted.

Indeed, the results of this next-generation CAR T-cell trial are “very impressive,” said invited discussant Yvonne Y. Chen, PhD, of the University of California, Los Angeles.

There have been concerns that “off-the-shelf” CAR T-cell products like TruUCAR GC027 might be limited by factors such as a reduced level of CAR T-cell persistence and therefore reduced efficacy leading to a need for repeat dosing, Dr. Chen noted. However, Dr. Wang and her colleagues showed a 100% CR/CRi rate with a single dose of CAR T cells and without graft-versus-host disease or neurotoxicity, Dr. Chen emphasized.

“I think it’s also important to note, however, that there’s quite a high incidence rate of grade 3 or higher toxicities, including CRS,” Dr. Chen said. “I suspect this may have something to do with the fairly high dosing levels used in this trial.”

The “big question,” however, is durability of the response, Dr. Chen said. “And this is something that the field will really watch as this trial progresses beyond the 7-month monitoring period ... reported today.”

Dr. Wang is an employee of Gracell Biotechnologies. Dr. Chen is cofounder of Kalthera Therapeutics and a scientific adviser for Gritstone Oncology and Notch Therapeutics.

sworcester@mdedge.com

SOURCE: Wang X et al. AACR 2020, Abstract CT052.

Minimal residual disease (MRD) surveillance after surgery can detect relapse in advance of imaging in patients with early-stage non–small cell lung cancer (NSCLC), according to findings from the TRACERx study.

The findings pave the way for clinical trials of MRD-driven treatment escalation, Chris Abbosh, MD, of University College London, reported during a presentation at the AACR virtual meeting I. Data in the presentation were updated from the abstract.

Dr. Abbosh and colleagues used phylogenetic circulating tumor DNA (ctDNA) profiling to assess MRD and predict relapse in patients from the TRACERx study who underwent surgery for stage I-III NSCLC.

“The approach we take is technically termed a ‘tumor-informed, personalized cell-free DNA-enrichment approach,’” Dr. Abbosh explained. “We take out the primary tumor from the patient, we multiregion sample that tumor, and submit each region for deep whole-exome sequencing.”

The researchers prioritize variants for MRD tracking based on clonality/subclonality, high copy number status, and low background sequencing noise. The researchers then construct an anchored-multiplex PCR panel against the positions of interest, which is applied to cell-free DNA in the pre- and postoperative setting.

“We’ve developed an MRD caller to go alongside this chemistry,” Dr. Abbosh said. “The main premise behind the MRD caller is that it can calculate intralibrary error rates to inform the MRD pool.”
 

Sensitivity and specificity

To validate their approach, Dr. Abbosh and colleagues tested the assay with low DNA input (5 ng, 10 ng) and high DNA input (30 ng, 60 ng). They found the assay to be more sensitive with higher DNA input, and variant fractions were detected down to 0.003%.

The researchers also assessed how sensitivity and specificity scale with an increasing number of variants – 50, 100, or 200 variants. When tracking 200 variants, the assay was powered to detect lower ctDNA fractions than when tracking 50 variants. On the other hand, specificity was higher with 50 variants (99.8%) than with 200 variants (99.4%).

Next, Dr. Abbosh and colleagues analyzed postoperative cell-free DNA collected at 271 time points from 37 NSCLC patients who did not relapse. This included 11 patients who developed proven second primary malignancies.

Of the 271 time points when MRD negativity was expected, MRD was not detected at 269 time points, which translates to 99.3% specificity for the assay.
 

Shedding, relapse, and disease-free survival

Dr. Abbosh and colleagues also found that non-adenocarcinoma histology is associated with preoperative ctDNA shedding in NSCLC. The researchers analyzed 88 early-stage preoperative samples from NSCLC patients. ctDNA was detected preoperatively in 49% of lung adenocarcinomas and 100% of lung squamous cell carcinomas.

“This finding is important when it comes to interpreting our non–small cell lung cancer relapse data from 53 TRACERx patients,” Dr. Abbosh said.

Of the 53 patients who relapsed, 42 had ctDNA detected prior to surgery and were thus considered shedders, while 11 were nonshedders. ctDNA was detectable at or before relapse in 91% (38/42) of shedders and 64% (7/11) of nonshedders.

The median time from ctDNA detection to clinical relapse was 164 days in shedders and 22 days in nonshedders. The median disease-free survival was 362 days and 640 days, respectively.

“So what these data suggest is that preoperative ctDNA detection status will be a proxy of the potential utility of ctDNA as an MRD biomarker in a clinical setting,” Dr. Abbosh explained.

Standard-of-care imaging findings in the 53 patients who relapsed further demonstrated the utility of ctDNA in this setting, Dr. Abbosh said.

All scans were divided into three categories: those showing unequivocal relapse, those with a new equivocal change (relapse, inflammation, or a nonspecific finding), and those with no evidence of relapse. Each was further categorized by preimaging MRD status.

Relapse occurred in 9 of 10 patients who were MRD positive but had a scan showing no evidence of relapse. Relapse occurred in 15 of 16 patients who were MRD positive and had scans showing new equivocal changes.

Patients with unequivocal evidence of relapse who were MRD negative at or before the scan were more likely to have a second primary cancer than to have NSCLC relapse (52% vs. 48%), which is a reflection of the specificity of the MRD assay to the primary tumor, Dr. Abbosh said.
 

Implications of the findings

The researchers’ findings are important because establishing an MRD-driven approach to treating early-stage NSCLC would facilitate escalation of standard-of-care treatment only for those patients at high risk for relapse, thereby overcoming a key challenge in conventional adjuvant drug-trial design, Dr. Abbosh said.

“If we take a patient population with high-risk early-stage disease who have undergone potentially curative resection of their cancer and we offer these patients adjuvant chemotherapy or adjuvant chemoradiation therapy, then we can improve 5-year survival outcomes in this population,” Dr. Abbosh said. “This is striking because, if we give the same treatment in the metastatic setting, we only see a progression-free survival benefit of a short number of months.”

This suggests a potential “vulnerability of low-burden residual cancer to systemic treatment following surgery,” he added. “So if we want to improve outcomes further in non–small cell lung cancer, we really need to focus on innovation in the early-stage space.”

Dr. Abbosh said he and colleagues demonstrated that “personalized cell-free DNA enrichment can detect low-frequency variant DNA in an accurate manner.

“We’ve shown that preoperative ctDNA shedding is associated with utility of ctDNA as an MRD biomarker and that MRD surveillance can lead to detection of relapse in advance of standard-of-care-imaging,” he said. “We feel that the field is now ready for MRD-driven adjuvant trials.”
 

Questions to be answered

Invited discussant Corey J. Langer, MD, of Penn Medicine in Philadelphia, outlined “fundamental questions” raised by the findings.

“We need more information on the staging and demographics of those who were MRD positive versus MRD negative,” he said.

Dr. Langer also asked about the findings for shedders versus nonshedders.

“Does this mean nonshedders fare better? This needs to addressed formally,” he said.

Another question is whether the assay “simply enables us to detect relapse sooner and increase anxiety,” or if the trajectory and outcomes in those who prove MRD positive ahead of radiographic manifestations can actually be altered.

A study comparing standard observation with early immunotherapy or chemoimmunotherapy in patients with MRD-positive radiographically occult relapse or progression – using progression-free and overall survival, along with time without symptoms of disease or relapse – would be useful, Dr. Langer said.

“A hazard ratio of 0.8 or less would be meaningful,” he added. “In this regard, there are trials looking at enhanced adjuvant treatment both in colorectal and breast cancer, and trials planned in advanced non–small cell [lung cancer].”

Dr. Langer also said it would be interesting to know if the assay can be used as an adjunct to diagnosis in frailer patients with inaccessible tumors or equivocal biopsy results or to avoid invasive procedures in patients who are stereotactic radiation candidates.

“The jury is still out on this,” he said.

TRACERx is funded by University College London in collaboration with Cancer Research UK. Dr. Abbosh disclosed relationships with AstraZeneca, Novartis, Roche Diagnostics, Bristol Myers Squibb, Achilles Therapeutics, and Archer Diagnostics. Dr. Langer reported grant/research support and/or scientific advisory work for multiple companies.

sworcester@mdedge.com

SOURCE: Abbosh C et al. AACR 2020, Abstract CT023.

Minimal residual disease (MRD) surveillance after surgery can detect relapse in advance of imaging in patients with early-stage non–small cell lung cancer (NSCLC), according to findings from the TRACERx study.

The findings pave the way for clinical trials of MRD-driven treatment escalation, Chris Abbosh, MD, of University College London, reported during a presentation at the AACR virtual meeting I. Data in the presentation were updated from the abstract.

Dr. Abbosh and colleagues used phylogenetic circulating tumor DNA (ctDNA) profiling to assess MRD and predict relapse in patients from the TRACERx study who underwent surgery for stage I-III NSCLC.

“The approach we take is technically termed a ‘tumor-informed, personalized cell-free DNA-enrichment approach,’” Dr. Abbosh explained. “We take out the primary tumor from the patient, we multiregion sample that tumor, and submit each region for deep whole-exome sequencing.”

The researchers prioritize variants for MRD tracking based on clonality/subclonality, high copy number status, and low background sequencing noise. The researchers then construct an anchored-multiplex PCR panel against the positions of interest, which is applied to cell-free DNA in the pre- and postoperative setting.

“We’ve developed an MRD caller to go alongside this chemistry,” Dr. Abbosh said. “The main premise behind the MRD caller is that it can calculate intralibrary error rates to inform the MRD pool.”
 

Sensitivity and specificity

To validate their approach, Dr. Abbosh and colleagues tested the assay with low DNA input (5 ng, 10 ng) and high DNA input (30 ng, 60 ng). They found the assay to be more sensitive with higher DNA input, and variant fractions were detected down to 0.003%.

The researchers also assessed how sensitivity and specificity scale with an increasing number of variants – 50, 100, or 200 variants. When tracking 200 variants, the assay was powered to detect lower ctDNA fractions than when tracking 50 variants. On the other hand, specificity was higher with 50 variants (99.8%) than with 200 variants (99.4%).

Next, Dr. Abbosh and colleagues analyzed postoperative cell-free DNA collected at 271 time points from 37 NSCLC patients who did not relapse. This included 11 patients who developed proven second primary malignancies.

Of the 271 time points when MRD negativity was expected, MRD was not detected at 269 time points, which translates to 99.3% specificity for the assay.
 

Shedding, relapse, and disease-free survival

Dr. Abbosh and colleagues also found that non-adenocarcinoma histology is associated with preoperative ctDNA shedding in NSCLC. The researchers analyzed 88 early-stage preoperative samples from NSCLC patients. ctDNA was detected preoperatively in 49% of lung adenocarcinomas and 100% of lung squamous cell carcinomas.

“This finding is important when it comes to interpreting our non–small cell lung cancer relapse data from 53 TRACERx patients,” Dr. Abbosh said.

Of the 53 patients who relapsed, 42 had ctDNA detected prior to surgery and were thus considered shedders, while 11 were nonshedders. ctDNA was detectable at or before relapse in 91% (38/42) of shedders and 64% (7/11) of nonshedders.

The median time from ctDNA detection to clinical relapse was 164 days in shedders and 22 days in nonshedders. The median disease-free survival was 362 days and 640 days, respectively.

“So what these data suggest is that preoperative ctDNA detection status will be a proxy of the potential utility of ctDNA as an MRD biomarker in a clinical setting,” Dr. Abbosh explained.

Standard-of-care imaging findings in the 53 patients who relapsed further demonstrated the utility of ctDNA in this setting, Dr. Abbosh said.

All scans were divided into three categories: those showing unequivocal relapse, those with a new equivocal change (relapse, inflammation, or a nonspecific finding), and those with no evidence of relapse. Each was further categorized by preimaging MRD status.

Relapse occurred in 9 of 10 patients who were MRD positive but had a scan showing no evidence of relapse. Relapse occurred in 15 of 16 patients who were MRD positive and had scans showing new equivocal changes.

Patients with unequivocal evidence of relapse who were MRD negative at or before the scan were more likely to have a second primary cancer than to have NSCLC relapse (52% vs. 48%), which is a reflection of the specificity of the MRD assay to the primary tumor, Dr. Abbosh said.
 

Implications of the findings

The researchers’ findings are important because establishing an MRD-driven approach to treating early-stage NSCLC would facilitate escalation of standard-of-care treatment only for those patients at high risk for relapse, thereby overcoming a key challenge in conventional adjuvant drug-trial design, Dr. Abbosh said.

“If we take a patient population with high-risk early-stage disease who have undergone potentially curative resection of their cancer and we offer these patients adjuvant chemotherapy or adjuvant chemoradiation therapy, then we can improve 5-year survival outcomes in this population,” Dr. Abbosh said. “This is striking because, if we give the same treatment in the metastatic setting, we only see a progression-free survival benefit of a short number of months.”

This suggests a potential “vulnerability of low-burden residual cancer to systemic treatment following surgery,” he added. “So if we want to improve outcomes further in non–small cell lung cancer, we really need to focus on innovation in the early-stage space.”

Dr. Abbosh said he and colleagues demonstrated that “personalized cell-free DNA enrichment can detect low-frequency variant DNA in an accurate manner.

“We’ve shown that preoperative ctDNA shedding is associated with utility of ctDNA as an MRD biomarker and that MRD surveillance can lead to detection of relapse in advance of standard-of-care-imaging,” he said. “We feel that the field is now ready for MRD-driven adjuvant trials.”
 

Questions to be answered

Invited discussant Corey J. Langer, MD, of Penn Medicine in Philadelphia, outlined “fundamental questions” raised by the findings.

“We need more information on the staging and demographics of those who were MRD positive versus MRD negative,” he said.

Dr. Langer also asked about the findings for shedders versus nonshedders.

“Does this mean nonshedders fare better? This needs to addressed formally,” he said.

Another question is whether the assay “simply enables us to detect relapse sooner and increase anxiety,” or if the trajectory and outcomes in those who prove MRD positive ahead of radiographic manifestations can actually be altered.

A study comparing standard observation with early immunotherapy or chemoimmunotherapy in patients with MRD-positive radiographically occult relapse or progression – using progression-free and overall survival, along with time without symptoms of disease or relapse – would be useful, Dr. Langer said.

“A hazard ratio of 0.8 or less would be meaningful,” he added. “In this regard, there are trials looking at enhanced adjuvant treatment both in colorectal and breast cancer, and trials planned in advanced non–small cell [lung cancer].”

Dr. Langer also said it would be interesting to know if the assay can be used as an adjunct to diagnosis in frailer patients with inaccessible tumors or equivocal biopsy results or to avoid invasive procedures in patients who are stereotactic radiation candidates.

“The jury is still out on this,” he said.

TRACERx is funded by University College London in collaboration with Cancer Research UK. Dr. Abbosh disclosed relationships with AstraZeneca, Novartis, Roche Diagnostics, Bristol Myers Squibb, Achilles Therapeutics, and Archer Diagnostics. Dr. Langer reported grant/research support and/or scientific advisory work for multiple companies.

sworcester@mdedge.com

SOURCE: Abbosh C et al. AACR 2020, Abstract CT023.

Minimal residual disease (MRD) surveillance after surgery can detect relapse in advance of imaging in patients with early-stage non–small cell lung cancer (NSCLC), according to findings from the TRACERx study.

The findings pave the way for clinical trials of MRD-driven treatment escalation, Chris Abbosh, MD, of University College London, reported during a presentation at the AACR virtual meeting I. Data in the presentation were updated from the abstract.

Dr. Abbosh and colleagues used phylogenetic circulating tumor DNA (ctDNA) profiling to assess MRD and predict relapse in patients from the TRACERx study who underwent surgery for stage I-III NSCLC.

“The approach we take is technically termed a ‘tumor-informed, personalized cell-free DNA-enrichment approach,’” Dr. Abbosh explained. “We take out the primary tumor from the patient, we multiregion sample that tumor, and submit each region for deep whole-exome sequencing.”

The researchers prioritize variants for MRD tracking based on clonality/subclonality, high copy number status, and low background sequencing noise. The researchers then construct an anchored-multiplex PCR panel against the positions of interest, which is applied to cell-free DNA in the pre- and postoperative setting.

“We’ve developed an MRD caller to go alongside this chemistry,” Dr. Abbosh said. “The main premise behind the MRD caller is that it can calculate intralibrary error rates to inform the MRD pool.”
 

Sensitivity and specificity

To validate their approach, Dr. Abbosh and colleagues tested the assay with low DNA input (5 ng, 10 ng) and high DNA input (30 ng, 60 ng). They found the assay to be more sensitive with higher DNA input, and variant fractions were detected down to 0.003%.

The researchers also assessed how sensitivity and specificity scale with an increasing number of variants – 50, 100, or 200 variants. When tracking 200 variants, the assay was powered to detect lower ctDNA fractions than when tracking 50 variants. On the other hand, specificity was higher with 50 variants (99.8%) than with 200 variants (99.4%).

Next, Dr. Abbosh and colleagues analyzed postoperative cell-free DNA collected at 271 time points from 37 NSCLC patients who did not relapse. This included 11 patients who developed proven second primary malignancies.

Of the 271 time points when MRD negativity was expected, MRD was not detected at 269 time points, which translates to 99.3% specificity for the assay.
 

Shedding, relapse, and disease-free survival

Dr. Abbosh and colleagues also found that non-adenocarcinoma histology is associated with preoperative ctDNA shedding in NSCLC. The researchers analyzed 88 early-stage preoperative samples from NSCLC patients. ctDNA was detected preoperatively in 49% of lung adenocarcinomas and 100% of lung squamous cell carcinomas.

“This finding is important when it comes to interpreting our non–small cell lung cancer relapse data from 53 TRACERx patients,” Dr. Abbosh said.

Of the 53 patients who relapsed, 42 had ctDNA detected prior to surgery and were thus considered shedders, while 11 were nonshedders. ctDNA was detectable at or before relapse in 91% (38/42) of shedders and 64% (7/11) of nonshedders.

The median time from ctDNA detection to clinical relapse was 164 days in shedders and 22 days in nonshedders. The median disease-free survival was 362 days and 640 days, respectively.

“So what these data suggest is that preoperative ctDNA detection status will be a proxy of the potential utility of ctDNA as an MRD biomarker in a clinical setting,” Dr. Abbosh explained.

Standard-of-care imaging findings in the 53 patients who relapsed further demonstrated the utility of ctDNA in this setting, Dr. Abbosh said.

All scans were divided into three categories: those showing unequivocal relapse, those with a new equivocal change (relapse, inflammation, or a nonspecific finding), and those with no evidence of relapse. Each was further categorized by preimaging MRD status.

Relapse occurred in 9 of 10 patients who were MRD positive but had a scan showing no evidence of relapse. Relapse occurred in 15 of 16 patients who were MRD positive and had scans showing new equivocal changes.

Patients with unequivocal evidence of relapse who were MRD negative at or before the scan were more likely to have a second primary cancer than to have NSCLC relapse (52% vs. 48%), which is a reflection of the specificity of the MRD assay to the primary tumor, Dr. Abbosh said.
 

Implications of the findings

The researchers’ findings are important because establishing an MRD-driven approach to treating early-stage NSCLC would facilitate escalation of standard-of-care treatment only for those patients at high risk for relapse, thereby overcoming a key challenge in conventional adjuvant drug-trial design, Dr. Abbosh said.

“If we take a patient population with high-risk early-stage disease who have undergone potentially curative resection of their cancer and we offer these patients adjuvant chemotherapy or adjuvant chemoradiation therapy, then we can improve 5-year survival outcomes in this population,” Dr. Abbosh said. “This is striking because, if we give the same treatment in the metastatic setting, we only see a progression-free survival benefit of a short number of months.”

This suggests a potential “vulnerability of low-burden residual cancer to systemic treatment following surgery,” he added. “So if we want to improve outcomes further in non–small cell lung cancer, we really need to focus on innovation in the early-stage space.”

Dr. Abbosh said he and colleagues demonstrated that “personalized cell-free DNA enrichment can detect low-frequency variant DNA in an accurate manner.

“We’ve shown that preoperative ctDNA shedding is associated with utility of ctDNA as an MRD biomarker and that MRD surveillance can lead to detection of relapse in advance of standard-of-care-imaging,” he said. “We feel that the field is now ready for MRD-driven adjuvant trials.”
 

Questions to be answered

Invited discussant Corey J. Langer, MD, of Penn Medicine in Philadelphia, outlined “fundamental questions” raised by the findings.

“We need more information on the staging and demographics of those who were MRD positive versus MRD negative,” he said.

Dr. Langer also asked about the findings for shedders versus nonshedders.

“Does this mean nonshedders fare better? This needs to addressed formally,” he said.

Another question is whether the assay “simply enables us to detect relapse sooner and increase anxiety,” or if the trajectory and outcomes in those who prove MRD positive ahead of radiographic manifestations can actually be altered.

A study comparing standard observation with early immunotherapy or chemoimmunotherapy in patients with MRD-positive radiographically occult relapse or progression – using progression-free and overall survival, along with time without symptoms of disease or relapse – would be useful, Dr. Langer said.

“A hazard ratio of 0.8 or less would be meaningful,” he added. “In this regard, there are trials looking at enhanced adjuvant treatment both in colorectal and breast cancer, and trials planned in advanced non–small cell [lung cancer].”

Dr. Langer also said it would be interesting to know if the assay can be used as an adjunct to diagnosis in frailer patients with inaccessible tumors or equivocal biopsy results or to avoid invasive procedures in patients who are stereotactic radiation candidates.

“The jury is still out on this,” he said.

TRACERx is funded by University College London in collaboration with Cancer Research UK. Dr. Abbosh disclosed relationships with AstraZeneca, Novartis, Roche Diagnostics, Bristol Myers Squibb, Achilles Therapeutics, and Archer Diagnostics. Dr. Langer reported grant/research support and/or scientific advisory work for multiple companies.

sworcester@mdedge.com

SOURCE: Abbosh C et al. AACR 2020, Abstract CT023.

Capmatinib produced rapid, deep responses in patients with advanced non–small cell lung cancer (NSCLC) harboring MET exon 14 (METex14) skipping mutations, according to a presentation at the AACR virtual meeting I.

The duration of response was impressive in both treatment-naive and previously treated patients, according to presenter Edward B. Garon, MD, of the University of California, Los Angeles.

In view of these responses, Dr. Garon urged early molecular testing in NSCLC.

He also noted that capmatinib produced responses in patients with brain metastases. However, because of small patient numbers, additional study is needed to validate the intracranial efficacy of capmatinib and ascertain mechanisms of resistance.

Study rationale and details

METex14 mutations are reported in up to 4% of patients with NSCLC and portend poor outcomes with chemotherapy and immune checkpoint inhibitors (PLoS One 2014; 9:e107677; Ann Oncol 2018;29:2085-91).

Capmatinib is a highly selective, reversible, and potent inhibitor of MET tyrosine kinase that crosses the blood-brain barrier.

In the phase 2 GEOMETRY mono-1 study, Dr. Garon and colleagues tested capmatinib, given at 400 mg orally twice a day, in patients with METex14-mutated, ALK and EGFR wild-type, stage IIIB/IV NSCLC. Patients with neurologically stable or asymptomatic brain metastases were eligible.

Dr. Garon presented safety data for all patients enrolled in this study and efficacy data for patients in cohorts 4 and 5b. Cohort 4 enrolled patients who received prior systemic therapy for advanced disease, and cohort 5b enrolled treatment-naive patients. Both cohorts had METex14 gene mutations but not amplification.

Efficacy

There were 97 patients evaluable for efficacy – 69 previously treated and 28 treatment naive. The median age in both cohorts was 71 years, most patients were female (58% of previously treated and 64.3% of treatment-naive patients), and most were never-smokers (58% and 64.3%, respectively). Adenocarcinoma was the predominant histology.

The overall response rate, per an independent review committee, was 40.6% in previously treated patients and 67.9% in treatment-naive patients.

Waterfall plots showed deep responses, with only four cases of disease progression in the previously treated cohort and none in the treatment-naive cohort.

Responses occurred rapidly. Many responses exceeded 1 year and were ongoing at the data cut-off. The median response duration was 9.72 months in previously treated patients and 11.14 months in treatment-naive patients.

There were 13 patients with evaluable baseline brain metastases (3.3 brain lesions per patient [range, 1-8]). Twelve patients had intracranial disease control, and seven patients (54%) had intracranial response. Four patients had complete resolution of all brain lesions.

Intracranial responses were generally seen by the first radiologic evaluation and occurred as rapidly as systemic responses.

Safety

With safety data on all 334 patients in the trial, the GEOMETRY mono-1 study is the largest reported experience with capmatinib in NSCLC patients. The median treatment exposure time was 14.9 weeks.

Overall, 35.6% of patients experienced a grade 3/4 adverse event (AE). Grade 4 AEs were observed in 4.5% of patients, and there were no treatment-related deaths.

Peripheral edema (41.6%), nausea (33.2%), increased blood creatinine (19.5%), and vomiting (18.9%) were the most frequent AEs of any grade.

In all, 21.9% of patients required dose adjustments due to treatment-related AEs, and 11.1% of patients stopped treatment because of an AE.

This study was sponsored by Novartis. Dr. Garon disclosed relationships with Novartis, AstraZeneca, Bristol-Myers Squibb, Dracen, Dynavax, Eli Lilly, EMD Serono, Genentech, GSK, Iovance, Merck, Mirati, and Neon.

Dr. Lyss was a community-based medical oncologist and clinical researcher for more than 35 years before his recent retirement. His clinical and research interests were focused on breast and lung cancers as well as expanding clinical trial access to medically underserved populations. He is based in St. Louis. He has no conflicts of interest.

SOURCE: Garon EB et al. AACR 2020, Abstract CT082.

Capmatinib produced rapid, deep responses in patients with advanced non–small cell lung cancer (NSCLC) harboring MET exon 14 (METex14) skipping mutations, according to a presentation at the AACR virtual meeting I.

The duration of response was impressive in both treatment-naive and previously treated patients, according to presenter Edward B. Garon, MD, of the University of California, Los Angeles.

In view of these responses, Dr. Garon urged early molecular testing in NSCLC.

He also noted that capmatinib produced responses in patients with brain metastases. However, because of small patient numbers, additional study is needed to validate the intracranial efficacy of capmatinib and ascertain mechanisms of resistance.

Study rationale and details

METex14 mutations are reported in up to 4% of patients with NSCLC and portend poor outcomes with chemotherapy and immune checkpoint inhibitors (PLoS One 2014; 9:e107677; Ann Oncol 2018;29:2085-91).

Capmatinib is a highly selective, reversible, and potent inhibitor of MET tyrosine kinase that crosses the blood-brain barrier.

In the phase 2 GEOMETRY mono-1 study, Dr. Garon and colleagues tested capmatinib, given at 400 mg orally twice a day, in patients with METex14-mutated, ALK and EGFR wild-type, stage IIIB/IV NSCLC. Patients with neurologically stable or asymptomatic brain metastases were eligible.

Dr. Garon presented safety data for all patients enrolled in this study and efficacy data for patients in cohorts 4 and 5b. Cohort 4 enrolled patients who received prior systemic therapy for advanced disease, and cohort 5b enrolled treatment-naive patients. Both cohorts had METex14 gene mutations but not amplification.

Efficacy

There were 97 patients evaluable for efficacy – 69 previously treated and 28 treatment naive. The median age in both cohorts was 71 years, most patients were female (58% of previously treated and 64.3% of treatment-naive patients), and most were never-smokers (58% and 64.3%, respectively). Adenocarcinoma was the predominant histology.

The overall response rate, per an independent review committee, was 40.6% in previously treated patients and 67.9% in treatment-naive patients.

Waterfall plots showed deep responses, with only four cases of disease progression in the previously treated cohort and none in the treatment-naive cohort.

Responses occurred rapidly. Many responses exceeded 1 year and were ongoing at the data cut-off. The median response duration was 9.72 months in previously treated patients and 11.14 months in treatment-naive patients.

There were 13 patients with evaluable baseline brain metastases (3.3 brain lesions per patient [range, 1-8]). Twelve patients had intracranial disease control, and seven patients (54%) had intracranial response. Four patients had complete resolution of all brain lesions.

Intracranial responses were generally seen by the first radiologic evaluation and occurred as rapidly as systemic responses.

Safety

With safety data on all 334 patients in the trial, the GEOMETRY mono-1 study is the largest reported experience with capmatinib in NSCLC patients. The median treatment exposure time was 14.9 weeks.

Overall, 35.6% of patients experienced a grade 3/4 adverse event (AE). Grade 4 AEs were observed in 4.5% of patients, and there were no treatment-related deaths.

Peripheral edema (41.6%), nausea (33.2%), increased blood creatinine (19.5%), and vomiting (18.9%) were the most frequent AEs of any grade.

In all, 21.9% of patients required dose adjustments due to treatment-related AEs, and 11.1% of patients stopped treatment because of an AE.

This study was sponsored by Novartis. Dr. Garon disclosed relationships with Novartis, AstraZeneca, Bristol-Myers Squibb, Dracen, Dynavax, Eli Lilly, EMD Serono, Genentech, GSK, Iovance, Merck, Mirati, and Neon.

Dr. Lyss was a community-based medical oncologist and clinical researcher for more than 35 years before his recent retirement. His clinical and research interests were focused on breast and lung cancers as well as expanding clinical trial access to medically underserved populations. He is based in St. Louis. He has no conflicts of interest.

SOURCE: Garon EB et al. AACR 2020, Abstract CT082.

Capmatinib produced rapid, deep responses in patients with advanced non–small cell lung cancer (NSCLC) harboring MET exon 14 (METex14) skipping mutations, according to a presentation at the AACR virtual meeting I.

The duration of response was impressive in both treatment-naive and previously treated patients, according to presenter Edward B. Garon, MD, of the University of California, Los Angeles.

In view of these responses, Dr. Garon urged early molecular testing in NSCLC.

He also noted that capmatinib produced responses in patients with brain metastases. However, because of small patient numbers, additional study is needed to validate the intracranial efficacy of capmatinib and ascertain mechanisms of resistance.

Study rationale and details

METex14 mutations are reported in up to 4% of patients with NSCLC and portend poor outcomes with chemotherapy and immune checkpoint inhibitors (PLoS One 2014; 9:e107677; Ann Oncol 2018;29:2085-91).

Capmatinib is a highly selective, reversible, and potent inhibitor of MET tyrosine kinase that crosses the blood-brain barrier.

In the phase 2 GEOMETRY mono-1 study, Dr. Garon and colleagues tested capmatinib, given at 400 mg orally twice a day, in patients with METex14-mutated, ALK and EGFR wild-type, stage IIIB/IV NSCLC. Patients with neurologically stable or asymptomatic brain metastases were eligible.

Dr. Garon presented safety data for all patients enrolled in this study and efficacy data for patients in cohorts 4 and 5b. Cohort 4 enrolled patients who received prior systemic therapy for advanced disease, and cohort 5b enrolled treatment-naive patients. Both cohorts had METex14 gene mutations but not amplification.

Efficacy

There were 97 patients evaluable for efficacy – 69 previously treated and 28 treatment naive. The median age in both cohorts was 71 years, most patients were female (58% of previously treated and 64.3% of treatment-naive patients), and most were never-smokers (58% and 64.3%, respectively). Adenocarcinoma was the predominant histology.

The overall response rate, per an independent review committee, was 40.6% in previously treated patients and 67.9% in treatment-naive patients.

Waterfall plots showed deep responses, with only four cases of disease progression in the previously treated cohort and none in the treatment-naive cohort.

Responses occurred rapidly. Many responses exceeded 1 year and were ongoing at the data cut-off. The median response duration was 9.72 months in previously treated patients and 11.14 months in treatment-naive patients.

There were 13 patients with evaluable baseline brain metastases (3.3 brain lesions per patient [range, 1-8]). Twelve patients had intracranial disease control, and seven patients (54%) had intracranial response. Four patients had complete resolution of all brain lesions.

Intracranial responses were generally seen by the first radiologic evaluation and occurred as rapidly as systemic responses.

Safety

With safety data on all 334 patients in the trial, the GEOMETRY mono-1 study is the largest reported experience with capmatinib in NSCLC patients. The median treatment exposure time was 14.9 weeks.

Overall, 35.6% of patients experienced a grade 3/4 adverse event (AE). Grade 4 AEs were observed in 4.5% of patients, and there were no treatment-related deaths.

Peripheral edema (41.6%), nausea (33.2%), increased blood creatinine (19.5%), and vomiting (18.9%) were the most frequent AEs of any grade.

In all, 21.9% of patients required dose adjustments due to treatment-related AEs, and 11.1% of patients stopped treatment because of an AE.

This study was sponsored by Novartis. Dr. Garon disclosed relationships with Novartis, AstraZeneca, Bristol-Myers Squibb, Dracen, Dynavax, Eli Lilly, EMD Serono, Genentech, GSK, Iovance, Merck, Mirati, and Neon.

Dr. Lyss was a community-based medical oncologist and clinical researcher for more than 35 years before his recent retirement. His clinical and research interests were focused on breast and lung cancers as well as expanding clinical trial access to medically underserved populations. He is based in St. Louis. He has no conflicts of interest.

SOURCE: Garon EB et al. AACR 2020, Abstract CT082.

A minimally invasive multicancer blood test used with standard-of-care screening is safe, effective, and feasible for use in routine clinical care, according to interim findings from a large, prospective study.

The DETECT-A blood test, an early version of the CancerSEEK test currently in development, effectively guided patient management in real time, in some cases leading to diagnosis of early cancer and potentially curative surgery in asymptomatic women with no history of cancer.

Nickolas Papadopoulos, PhD, of Johns Hopkins Medicine in Baltimore, reported these findings at the AACR virtual meeting I. The findings were simultaneously published in Science.

The study enrolled 10,006 women, aged 65-75 years, with no prior cancer diagnosis. After exclusion and loss to follow-up, 9,911 women remained.

There were 26 patients who had cancer detected by the DETECT-A blood test, 15 of whom underwent follow-up PET-CT imaging and 9 of whom underwent surgical excision. An additional 24 cancers were detected by standard screening, and 46 were detected by other means.

The positive predictive value of the blood test was 19%. When the blood test was combined with imaging, the positive predictive value was 41%.
 

Improving upon standard screening

“Standard-of-care screening [was used] for three different organs: breast, lung, and colon. It was more sensitive for breast cancer,” Dr. Papadopoulos noted. “Blood testing, though, identified cancer in 10 different organs.”

In fact, the DETECT-A blood test detected 14 of 45 cancers in 7 organs for which no standard screening test is available.

In addition, 12 cancers in 3 organs (breast, lung, and colon) were first detected by DETECT-A rather than by standard screening. This increased the sensitivity of cancer detection from 47% with standard screening alone to 71% with standard screening plus blood testing.

“More important, 65% [of the cancers detected by blood test] were localized or regional, which have higher chance of successful treatment with intent to cure,” Dr. Papadopoulos said.

DETECT-A covers regions of 16 commonly mutated genes and 9 proteins known to be associated with cancer. In this study, 57% of cancers were detected by mutations.
 

Safety and additional screening

DETECT-A also proved safe, “without incurring a large number of futile invasive follow-up tests,” Dr. Papadopoulos said.

In fact, only 1% of patients without cancer underwent PET-CT imaging, and only 0.22% underwent a “futile” invasive follow-up procedure.

Three surgeries occurred in patients who were counted as false-positives, but the surgeries were determined to be indicated, Dr. Papadopoulos said. He explained that one was for large colonic polyps with high-grade dysplasia that could not be removed endoscopically, one was for an in situ carcinoma of the appendix, and one was for a 10-cm ovarian lesion that was found to be a mucinous cystadenoma.

The investigators also analyzed whether the availability of a “liquid biopsy” test like DETECT-A would inadvertently reduce patients’ use of standard screening and found that it did not. Mammography screening habits after receiving the baseline DETECT-A blood test did not differ significantly from those prior to study enrollment.

These findings are important because early detection is a key factor in reducing cancer-specific morbidity and mortality, and although minimally invasive screening tests, including liquid biopsies like DETECT-A, hold great promise, prospective clinical studies of these new methods are needed to ensure that the anticipated benefits outweigh the potential risks, Dr. Papadopoulos explained.

“The problem is that most cancers are detected at advanced stages when they are difficult to treat,” he said. “The earlier cancer is detected, the greater the chance of successful treatment.”
 

Unanswered questions and future studies

This study demonstrates that it is feasible for a minimally invasive blood test to safely detect multiple cancer types in patients without a history of cancer and to enable treatment with curative intent, at least in a subset of individuals, Dr. Papadopoulos said. He added that the findings also inform the design of future randomized trials “to establish clinical utility, cost-effectiveness, and benefit-to-risk ratio of future tests.”

Further studies will also be required to determine the clinical validity and utility of the strategy of using liquid biopsy as a complement to standard-of-care screening, Dr. Papadopoulos said.

Invited discussant David G. Huntsman, MD, of the University of British Columbia in Vancouver, applauded the investigators, saying this study serves to “move the field forward.” However, it still isn’t clear how sensitivity and negative predictive value will be determined and what the optimal testing schedule is.

“This is a prospective study that will provide the data on how this assay will be used [and] whether it should be used going forward,” Dr. Huntsman said, noting that the “much bigger and more important question” is whether it improves survival.

Cost-effectiveness will also be critical, he said.

This research was supported by The Marcus Foundation, Lustgarten Foundation for Pancreatic Cancer Research, The Virginia and D.K. Ludwig Fund for Cancer Research, The Sol Goldman Center for Pancreatic Cancer Research, Susan Wojcicki and Dennis Troper, the Rolfe Foundation, The Conrad R. Hilton Foundation, The John Templeton Foundation, Burroughs Wellcome Career Award For Medical Scientists, and grants/contracts from the National Institutes of Health.

Dr. Papadopoulos disclosed relationships with Thrive Earlier Detection Inc., PGDx Inc., NeoPhore, Cage Pharma, and other companies. Dr. Huntsman is a founder, shareholder, and chief medical officer for Contextual Genomics.

sworcester@mdedge.com

SOURCE: Papadopoulos N et al. AACR 2020, Abstract CT022; Lennon AM et al. Science. 2020 Apr 28. pii: eabb9601. doi: 10.1126/science.abb9601.

A minimally invasive multicancer blood test used with standard-of-care screening is safe, effective, and feasible for use in routine clinical care, according to interim findings from a large, prospective study.

The DETECT-A blood test, an early version of the CancerSEEK test currently in development, effectively guided patient management in real time, in some cases leading to diagnosis of early cancer and potentially curative surgery in asymptomatic women with no history of cancer.

Nickolas Papadopoulos, PhD, of Johns Hopkins Medicine in Baltimore, reported these findings at the AACR virtual meeting I. The findings were simultaneously published in Science.

The study enrolled 10,006 women, aged 65-75 years, with no prior cancer diagnosis. After exclusion and loss to follow-up, 9,911 women remained.

There were 26 patients who had cancer detected by the DETECT-A blood test, 15 of whom underwent follow-up PET-CT imaging and 9 of whom underwent surgical excision. An additional 24 cancers were detected by standard screening, and 46 were detected by other means.

The positive predictive value of the blood test was 19%. When the blood test was combined with imaging, the positive predictive value was 41%.
 

Improving upon standard screening

“Standard-of-care screening [was used] for three different organs: breast, lung, and colon. It was more sensitive for breast cancer,” Dr. Papadopoulos noted. “Blood testing, though, identified cancer in 10 different organs.”

In fact, the DETECT-A blood test detected 14 of 45 cancers in 7 organs for which no standard screening test is available.

In addition, 12 cancers in 3 organs (breast, lung, and colon) were first detected by DETECT-A rather than by standard screening. This increased the sensitivity of cancer detection from 47% with standard screening alone to 71% with standard screening plus blood testing.

“More important, 65% [of the cancers detected by blood test] were localized or regional, which have higher chance of successful treatment with intent to cure,” Dr. Papadopoulos said.

DETECT-A covers regions of 16 commonly mutated genes and 9 proteins known to be associated with cancer. In this study, 57% of cancers were detected by mutations.
 

Safety and additional screening

DETECT-A also proved safe, “without incurring a large number of futile invasive follow-up tests,” Dr. Papadopoulos said.

In fact, only 1% of patients without cancer underwent PET-CT imaging, and only 0.22% underwent a “futile” invasive follow-up procedure.

Three surgeries occurred in patients who were counted as false-positives, but the surgeries were determined to be indicated, Dr. Papadopoulos said. He explained that one was for large colonic polyps with high-grade dysplasia that could not be removed endoscopically, one was for an in situ carcinoma of the appendix, and one was for a 10-cm ovarian lesion that was found to be a mucinous cystadenoma.

The investigators also analyzed whether the availability of a “liquid biopsy” test like DETECT-A would inadvertently reduce patients’ use of standard screening and found that it did not. Mammography screening habits after receiving the baseline DETECT-A blood test did not differ significantly from those prior to study enrollment.

These findings are important because early detection is a key factor in reducing cancer-specific morbidity and mortality, and although minimally invasive screening tests, including liquid biopsies like DETECT-A, hold great promise, prospective clinical studies of these new methods are needed to ensure that the anticipated benefits outweigh the potential risks, Dr. Papadopoulos explained.

“The problem is that most cancers are detected at advanced stages when they are difficult to treat,” he said. “The earlier cancer is detected, the greater the chance of successful treatment.”
 

Unanswered questions and future studies

This study demonstrates that it is feasible for a minimally invasive blood test to safely detect multiple cancer types in patients without a history of cancer and to enable treatment with curative intent, at least in a subset of individuals, Dr. Papadopoulos said. He added that the findings also inform the design of future randomized trials “to establish clinical utility, cost-effectiveness, and benefit-to-risk ratio of future tests.”

Further studies will also be required to determine the clinical validity and utility of the strategy of using liquid biopsy as a complement to standard-of-care screening, Dr. Papadopoulos said.

Invited discussant David G. Huntsman, MD, of the University of British Columbia in Vancouver, applauded the investigators, saying this study serves to “move the field forward.” However, it still isn’t clear how sensitivity and negative predictive value will be determined and what the optimal testing schedule is.

“This is a prospective study that will provide the data on how this assay will be used [and] whether it should be used going forward,” Dr. Huntsman said, noting that the “much bigger and more important question” is whether it improves survival.

Cost-effectiveness will also be critical, he said.

This research was supported by The Marcus Foundation, Lustgarten Foundation for Pancreatic Cancer Research, The Virginia and D.K. Ludwig Fund for Cancer Research, The Sol Goldman Center for Pancreatic Cancer Research, Susan Wojcicki and Dennis Troper, the Rolfe Foundation, The Conrad R. Hilton Foundation, The John Templeton Foundation, Burroughs Wellcome Career Award For Medical Scientists, and grants/contracts from the National Institutes of Health.

Dr. Papadopoulos disclosed relationships with Thrive Earlier Detection Inc., PGDx Inc., NeoPhore, Cage Pharma, and other companies. Dr. Huntsman is a founder, shareholder, and chief medical officer for Contextual Genomics.

sworcester@mdedge.com

SOURCE: Papadopoulos N et al. AACR 2020, Abstract CT022; Lennon AM et al. Science. 2020 Apr 28. pii: eabb9601. doi: 10.1126/science.abb9601.

A minimally invasive multicancer blood test used with standard-of-care screening is safe, effective, and feasible for use in routine clinical care, according to interim findings from a large, prospective study.

The DETECT-A blood test, an early version of the CancerSEEK test currently in development, effectively guided patient management in real time, in some cases leading to diagnosis of early cancer and potentially curative surgery in asymptomatic women with no history of cancer.

Nickolas Papadopoulos, PhD, of Johns Hopkins Medicine in Baltimore, reported these findings at the AACR virtual meeting I. The findings were simultaneously published in Science.

The study enrolled 10,006 women, aged 65-75 years, with no prior cancer diagnosis. After exclusion and loss to follow-up, 9,911 women remained.

There were 26 patients who had cancer detected by the DETECT-A blood test, 15 of whom underwent follow-up PET-CT imaging and 9 of whom underwent surgical excision. An additional 24 cancers were detected by standard screening, and 46 were detected by other means.

The positive predictive value of the blood test was 19%. When the blood test was combined with imaging, the positive predictive value was 41%.
 

Improving upon standard screening

“Standard-of-care screening [was used] for three different organs: breast, lung, and colon. It was more sensitive for breast cancer,” Dr. Papadopoulos noted. “Blood testing, though, identified cancer in 10 different organs.”

In fact, the DETECT-A blood test detected 14 of 45 cancers in 7 organs for which no standard screening test is available.

In addition, 12 cancers in 3 organs (breast, lung, and colon) were first detected by DETECT-A rather than by standard screening. This increased the sensitivity of cancer detection from 47% with standard screening alone to 71% with standard screening plus blood testing.

“More important, 65% [of the cancers detected by blood test] were localized or regional, which have higher chance of successful treatment with intent to cure,” Dr. Papadopoulos said.

DETECT-A covers regions of 16 commonly mutated genes and 9 proteins known to be associated with cancer. In this study, 57% of cancers were detected by mutations.
 

Safety and additional screening

DETECT-A also proved safe, “without incurring a large number of futile invasive follow-up tests,” Dr. Papadopoulos said.

In fact, only 1% of patients without cancer underwent PET-CT imaging, and only 0.22% underwent a “futile” invasive follow-up procedure.

Three surgeries occurred in patients who were counted as false-positives, but the surgeries were determined to be indicated, Dr. Papadopoulos said. He explained that one was for large colonic polyps with high-grade dysplasia that could not be removed endoscopically, one was for an in situ carcinoma of the appendix, and one was for a 10-cm ovarian lesion that was found to be a mucinous cystadenoma.

The investigators also analyzed whether the availability of a “liquid biopsy” test like DETECT-A would inadvertently reduce patients’ use of standard screening and found that it did not. Mammography screening habits after receiving the baseline DETECT-A blood test did not differ significantly from those prior to study enrollment.

These findings are important because early detection is a key factor in reducing cancer-specific morbidity and mortality, and although minimally invasive screening tests, including liquid biopsies like DETECT-A, hold great promise, prospective clinical studies of these new methods are needed to ensure that the anticipated benefits outweigh the potential risks, Dr. Papadopoulos explained.

“The problem is that most cancers are detected at advanced stages when they are difficult to treat,” he said. “The earlier cancer is detected, the greater the chance of successful treatment.”
 

Unanswered questions and future studies

This study demonstrates that it is feasible for a minimally invasive blood test to safely detect multiple cancer types in patients without a history of cancer and to enable treatment with curative intent, at least in a subset of individuals, Dr. Papadopoulos said. He added that the findings also inform the design of future randomized trials “to establish clinical utility, cost-effectiveness, and benefit-to-risk ratio of future tests.”

Further studies will also be required to determine the clinical validity and utility of the strategy of using liquid biopsy as a complement to standard-of-care screening, Dr. Papadopoulos said.

Invited discussant David G. Huntsman, MD, of the University of British Columbia in Vancouver, applauded the investigators, saying this study serves to “move the field forward.” However, it still isn’t clear how sensitivity and negative predictive value will be determined and what the optimal testing schedule is.

“This is a prospective study that will provide the data on how this assay will be used [and] whether it should be used going forward,” Dr. Huntsman said, noting that the “much bigger and more important question” is whether it improves survival.

Cost-effectiveness will also be critical, he said.

This research was supported by The Marcus Foundation, Lustgarten Foundation for Pancreatic Cancer Research, The Virginia and D.K. Ludwig Fund for Cancer Research, The Sol Goldman Center for Pancreatic Cancer Research, Susan Wojcicki and Dennis Troper, the Rolfe Foundation, The Conrad R. Hilton Foundation, The John Templeton Foundation, Burroughs Wellcome Career Award For Medical Scientists, and grants/contracts from the National Institutes of Health.

Dr. Papadopoulos disclosed relationships with Thrive Earlier Detection Inc., PGDx Inc., NeoPhore, Cage Pharma, and other companies. Dr. Huntsman is a founder, shareholder, and chief medical officer for Contextual Genomics.

sworcester@mdedge.com

SOURCE: Papadopoulos N et al. AACR 2020, Abstract CT022; Lennon AM et al. Science. 2020 Apr 28. pii: eabb9601. doi: 10.1126/science.abb9601.

Triple-negative breast cancer (TNBC) is a particularly aggressive form of this disease, with a poor prognosis, so there is great interest in any new treatment approach. Immunotherapy has raised hopes in TNBC, but more recently, studies have produced conflicting results.

New results show that adding a novel immune activator, Imprime PGG (Biothera), to immunotherapy with pembrolizumab (Keytruda, Merck) appears to improve the clinical benefit. The overall survival seen with the combination was twice that seen in a separate trial with pembrolizumab alone.

The new results were presented during the American Association for Cancer Research (AACR) virtual annual meeting I.

They come from the IMPRIME 1 trial, conducted in 44 women with metastatic TNBC who had anti-glucan antibodies.

“These were patients who had had prior chemotherapy and had extensive disease, including the majority with visceral disease and even liver metastasis,” said investigator Steven O’Day, MD, from the John Wayne Cancer Institute in Santa Monica, California.

All patients were treated with the combination. “We see encouraging clinical benefit evidence across all of our clinical measurements: response, durable response, and median and overall survival compared to historical single-agent [anti] PD-1 in a similar metastatic triple-negative breast cancer population,” he said.

At a median follow-up of 22.5 months, median overall survival with the combination among the 44 patients treated was 16.4 months.

In contrast, in the Keynote-086 trial of pembrolizumab monotherapy in patients with TNBC, median overall survival was 9 months, O’Day said.

He emphasized, however, that the IMPRIME 1 trial was not designed or powered to directly compare the combination therapy with pembrolizumab monotherapy.

Clinical benefit with the combination was particularly pronounced for patients who were so-called TNBC “converters” — that is, they originally had estrogen receptor (ER)-positive tumors that had progressed on endocrine therapy and, prior to starting treatment with Imprime PGG and pembrolizumab, they had biopsy results confirming TNBC, O’Day said.

The overall response rate (ORR) for all 44 patients included in the efficacy analysis was 15.9%. But among the 12 patients whose disease converted from ER-positive to TNBC after endocrine therapy, six had a response, for an ORR of 50% and a median overall survival of 17.1 months.

“It is not clear whether hormone resistance may have led to the increased responses versus secondary triple-negative status, but it is of great interest to us,” O’Day said.
 

Why This Special Benefit?

Invited discussant Ben Ho Park, MD, PhD, from Vanderbilt University Medical Center in Nashville, Tennessee, commented that the finding of special benefit among TNBC converters raises the question of biomarkers to determine which patients might most benefit from the combination.

“We already know that anti-beta-glucan antibodies were required to be actually eligible for this study, but is it that, in combination with immune activation, or prior ER-positive disease?” he said. “What about the role of PD-L1 staining? Can we actually combine all this data to come up with some sort of predictive score for whether or not a patient is more or less likely to respond, and more or less likely to have toxicities?”

Yeast-Derived Compound

Imprime PGG is a novel beta-glucan isolated from the cell walls of saccharomyces yeast that binds to endogenous anti-beta-glucan antibodies to form an immune complex.

The immune complex, which is the active drug, binds to a receptor known as dectin-1 to activate innate immunity and reprogram the immunosuppressive tumor microenvironment, enhance antigen presentation, and trigger T-cell activation to improve the efficacy of immune checkpoint inhibitor therapy, O’Day explained.

The complex has been administered to date to approximately 600 healthy volunteers and patients. In these studies, it was administered intravenously at doses of 2 mg/kg to 6 mg/kg weekly as monotherapy or in combination with anti-angiogenic antibodies or tumor-targeting antibodies, with or without chemotherapy.

Studies in volunteers showed that the complex activated innate immunity. Patients have tolerated it well, with no significant safety signals in either monotherapy or combination, with grade 1 or 2 infusion-related reactions being the most common adverse events to date, O’Day reported.

Study Details

Imprime 1 was a single-arm phase 2 trial enrolling 44 women with TNBC who had received at least one prior line of treatment, but not with an immune checkpoint inhibitor. They were all required to have anti-beta-glucan antibody levels of at least 20 mcg/mL.

All patients received the combination, which comprised Imprime PGG 4 mg/kg weekly plus pembrolizumab 200 mg IV every 3 weeks.

Twenty one patients were under age 50 years, and 23 were 50 years old and older. Seventeen patients were premenopausal, and 27 were postmenopausal. In all, 15 patients had more than three prior lines of therapy for metastatic disease, 30 had visceral disease, and 12 had liver metastases; only four had metastases confined to lymph nodes.

As noted above, median overall survival for all patients was 16.4 months. The ORR was 15.9%, and the disease control rate (a combination of complete and partial responses plus stable disease) was 25%. The median progression-free survival was 2.7 months (vs 2 months in Keynote-086).

In all, 39 of the 44 patients had treatment-related adverse events, with the most common being nausea, back pain, chills, fatigue, diarrhea, arthralgia, and headache. Four patients had grade 3 or 4 events, which included an infusion-related reaction, hyperglycemia, pericarditis, and pancreatitis.

Infusion-related reactions were seen in 27 patients, but only one of these reactions was grade 3 or 4.

The most common immune-mediated events were grade 1 or 2 thyroid dysfunction, which is commonly seen with PD-1 inhibitors, and there were single low-grade events of pancreatitis, pneumonitis, and pericarditis “most likely related to PD-1 inhibitor therapy,” O’Day said.

Translational data showed that innate and adaptive immunity in peripheral blood correlates with clinical benefit, with longer overall survival among patients with either monocyte activation (P = .0045) or T-cell activation (P = .012) compared with patients without activation of those components.

Taken together, the findings suggest that larger controlled studies of the combination are warranted, O’Day said.

The study was sponsored by Biothera and Merck. O’Day disclosed advisory board activities and research funding from both companies and others, and consulting for Biothera. Park disclosed royalties and consulting activities from several companies, not including the Imprime 1 sponsors.
 

This article first appeared on Medscape.com.

Triple-negative breast cancer (TNBC) is a particularly aggressive form of this disease, with a poor prognosis, so there is great interest in any new treatment approach. Immunotherapy has raised hopes in TNBC, but more recently, studies have produced conflicting results.

New results show that adding a novel immune activator, Imprime PGG (Biothera), to immunotherapy with pembrolizumab (Keytruda, Merck) appears to improve the clinical benefit. The overall survival seen with the combination was twice that seen in a separate trial with pembrolizumab alone.

The new results were presented during the American Association for Cancer Research (AACR) virtual annual meeting I.

They come from the IMPRIME 1 trial, conducted in 44 women with metastatic TNBC who had anti-glucan antibodies.

“These were patients who had had prior chemotherapy and had extensive disease, including the majority with visceral disease and even liver metastasis,” said investigator Steven O’Day, MD, from the John Wayne Cancer Institute in Santa Monica, California.

All patients were treated with the combination. “We see encouraging clinical benefit evidence across all of our clinical measurements: response, durable response, and median and overall survival compared to historical single-agent [anti] PD-1 in a similar metastatic triple-negative breast cancer population,” he said.

At a median follow-up of 22.5 months, median overall survival with the combination among the 44 patients treated was 16.4 months.

In contrast, in the Keynote-086 trial of pembrolizumab monotherapy in patients with TNBC, median overall survival was 9 months, O’Day said.

He emphasized, however, that the IMPRIME 1 trial was not designed or powered to directly compare the combination therapy with pembrolizumab monotherapy.

Clinical benefit with the combination was particularly pronounced for patients who were so-called TNBC “converters” — that is, they originally had estrogen receptor (ER)-positive tumors that had progressed on endocrine therapy and, prior to starting treatment with Imprime PGG and pembrolizumab, they had biopsy results confirming TNBC, O’Day said.

The overall response rate (ORR) for all 44 patients included in the efficacy analysis was 15.9%. But among the 12 patients whose disease converted from ER-positive to TNBC after endocrine therapy, six had a response, for an ORR of 50% and a median overall survival of 17.1 months.

“It is not clear whether hormone resistance may have led to the increased responses versus secondary triple-negative status, but it is of great interest to us,” O’Day said.
 

Why This Special Benefit?

Invited discussant Ben Ho Park, MD, PhD, from Vanderbilt University Medical Center in Nashville, Tennessee, commented that the finding of special benefit among TNBC converters raises the question of biomarkers to determine which patients might most benefit from the combination.

“We already know that anti-beta-glucan antibodies were required to be actually eligible for this study, but is it that, in combination with immune activation, or prior ER-positive disease?” he said. “What about the role of PD-L1 staining? Can we actually combine all this data to come up with some sort of predictive score for whether or not a patient is more or less likely to respond, and more or less likely to have toxicities?”

Yeast-Derived Compound

Imprime PGG is a novel beta-glucan isolated from the cell walls of saccharomyces yeast that binds to endogenous anti-beta-glucan antibodies to form an immune complex.

The immune complex, which is the active drug, binds to a receptor known as dectin-1 to activate innate immunity and reprogram the immunosuppressive tumor microenvironment, enhance antigen presentation, and trigger T-cell activation to improve the efficacy of immune checkpoint inhibitor therapy, O’Day explained.

The complex has been administered to date to approximately 600 healthy volunteers and patients. In these studies, it was administered intravenously at doses of 2 mg/kg to 6 mg/kg weekly as monotherapy or in combination with anti-angiogenic antibodies or tumor-targeting antibodies, with or without chemotherapy.

Studies in volunteers showed that the complex activated innate immunity. Patients have tolerated it well, with no significant safety signals in either monotherapy or combination, with grade 1 or 2 infusion-related reactions being the most common adverse events to date, O’Day reported.

Study Details

Imprime 1 was a single-arm phase 2 trial enrolling 44 women with TNBC who had received at least one prior line of treatment, but not with an immune checkpoint inhibitor. They were all required to have anti-beta-glucan antibody levels of at least 20 mcg/mL.

All patients received the combination, which comprised Imprime PGG 4 mg/kg weekly plus pembrolizumab 200 mg IV every 3 weeks.

Twenty one patients were under age 50 years, and 23 were 50 years old and older. Seventeen patients were premenopausal, and 27 were postmenopausal. In all, 15 patients had more than three prior lines of therapy for metastatic disease, 30 had visceral disease, and 12 had liver metastases; only four had metastases confined to lymph nodes.

As noted above, median overall survival for all patients was 16.4 months. The ORR was 15.9%, and the disease control rate (a combination of complete and partial responses plus stable disease) was 25%. The median progression-free survival was 2.7 months (vs 2 months in Keynote-086).

In all, 39 of the 44 patients had treatment-related adverse events, with the most common being nausea, back pain, chills, fatigue, diarrhea, arthralgia, and headache. Four patients had grade 3 or 4 events, which included an infusion-related reaction, hyperglycemia, pericarditis, and pancreatitis.

Infusion-related reactions were seen in 27 patients, but only one of these reactions was grade 3 or 4.

The most common immune-mediated events were grade 1 or 2 thyroid dysfunction, which is commonly seen with PD-1 inhibitors, and there were single low-grade events of pancreatitis, pneumonitis, and pericarditis “most likely related to PD-1 inhibitor therapy,” O’Day said.

Translational data showed that innate and adaptive immunity in peripheral blood correlates with clinical benefit, with longer overall survival among patients with either monocyte activation (P = .0045) or T-cell activation (P = .012) compared with patients without activation of those components.

Taken together, the findings suggest that larger controlled studies of the combination are warranted, O’Day said.

The study was sponsored by Biothera and Merck. O’Day disclosed advisory board activities and research funding from both companies and others, and consulting for Biothera. Park disclosed royalties and consulting activities from several companies, not including the Imprime 1 sponsors.
 

This article first appeared on Medscape.com.

Triple-negative breast cancer (TNBC) is a particularly aggressive form of this disease, with a poor prognosis, so there is great interest in any new treatment approach. Immunotherapy has raised hopes in TNBC, but more recently, studies have produced conflicting results.

New results show that adding a novel immune activator, Imprime PGG (Biothera), to immunotherapy with pembrolizumab (Keytruda, Merck) appears to improve the clinical benefit. The overall survival seen with the combination was twice that seen in a separate trial with pembrolizumab alone.

The new results were presented during the American Association for Cancer Research (AACR) virtual annual meeting I.

They come from the IMPRIME 1 trial, conducted in 44 women with metastatic TNBC who had anti-glucan antibodies.

“These were patients who had had prior chemotherapy and had extensive disease, including the majority with visceral disease and even liver metastasis,” said investigator Steven O’Day, MD, from the John Wayne Cancer Institute in Santa Monica, California.

All patients were treated with the combination. “We see encouraging clinical benefit evidence across all of our clinical measurements: response, durable response, and median and overall survival compared to historical single-agent [anti] PD-1 in a similar metastatic triple-negative breast cancer population,” he said.

At a median follow-up of 22.5 months, median overall survival with the combination among the 44 patients treated was 16.4 months.

In contrast, in the Keynote-086 trial of pembrolizumab monotherapy in patients with TNBC, median overall survival was 9 months, O’Day said.

He emphasized, however, that the IMPRIME 1 trial was not designed or powered to directly compare the combination therapy with pembrolizumab monotherapy.

Clinical benefit with the combination was particularly pronounced for patients who were so-called TNBC “converters” — that is, they originally had estrogen receptor (ER)-positive tumors that had progressed on endocrine therapy and, prior to starting treatment with Imprime PGG and pembrolizumab, they had biopsy results confirming TNBC, O’Day said.

The overall response rate (ORR) for all 44 patients included in the efficacy analysis was 15.9%. But among the 12 patients whose disease converted from ER-positive to TNBC after endocrine therapy, six had a response, for an ORR of 50% and a median overall survival of 17.1 months.

“It is not clear whether hormone resistance may have led to the increased responses versus secondary triple-negative status, but it is of great interest to us,” O’Day said.
 

Why This Special Benefit?

Invited discussant Ben Ho Park, MD, PhD, from Vanderbilt University Medical Center in Nashville, Tennessee, commented that the finding of special benefit among TNBC converters raises the question of biomarkers to determine which patients might most benefit from the combination.

“We already know that anti-beta-glucan antibodies were required to be actually eligible for this study, but is it that, in combination with immune activation, or prior ER-positive disease?” he said. “What about the role of PD-L1 staining? Can we actually combine all this data to come up with some sort of predictive score for whether or not a patient is more or less likely to respond, and more or less likely to have toxicities?”

Yeast-Derived Compound

Imprime PGG is a novel beta-glucan isolated from the cell walls of saccharomyces yeast that binds to endogenous anti-beta-glucan antibodies to form an immune complex.

The immune complex, which is the active drug, binds to a receptor known as dectin-1 to activate innate immunity and reprogram the immunosuppressive tumor microenvironment, enhance antigen presentation, and trigger T-cell activation to improve the efficacy of immune checkpoint inhibitor therapy, O’Day explained.

The complex has been administered to date to approximately 600 healthy volunteers and patients. In these studies, it was administered intravenously at doses of 2 mg/kg to 6 mg/kg weekly as monotherapy or in combination with anti-angiogenic antibodies or tumor-targeting antibodies, with or without chemotherapy.

Studies in volunteers showed that the complex activated innate immunity. Patients have tolerated it well, with no significant safety signals in either monotherapy or combination, with grade 1 or 2 infusion-related reactions being the most common adverse events to date, O’Day reported.

Study Details

Imprime 1 was a single-arm phase 2 trial enrolling 44 women with TNBC who had received at least one prior line of treatment, but not with an immune checkpoint inhibitor. They were all required to have anti-beta-glucan antibody levels of at least 20 mcg/mL.

All patients received the combination, which comprised Imprime PGG 4 mg/kg weekly plus pembrolizumab 200 mg IV every 3 weeks.

Twenty one patients were under age 50 years, and 23 were 50 years old and older. Seventeen patients were premenopausal, and 27 were postmenopausal. In all, 15 patients had more than three prior lines of therapy for metastatic disease, 30 had visceral disease, and 12 had liver metastases; only four had metastases confined to lymph nodes.

As noted above, median overall survival for all patients was 16.4 months. The ORR was 15.9%, and the disease control rate (a combination of complete and partial responses plus stable disease) was 25%. The median progression-free survival was 2.7 months (vs 2 months in Keynote-086).

In all, 39 of the 44 patients had treatment-related adverse events, with the most common being nausea, back pain, chills, fatigue, diarrhea, arthralgia, and headache. Four patients had grade 3 or 4 events, which included an infusion-related reaction, hyperglycemia, pericarditis, and pancreatitis.

Infusion-related reactions were seen in 27 patients, but only one of these reactions was grade 3 or 4.

The most common immune-mediated events were grade 1 or 2 thyroid dysfunction, which is commonly seen with PD-1 inhibitors, and there were single low-grade events of pancreatitis, pneumonitis, and pericarditis “most likely related to PD-1 inhibitor therapy,” O’Day said.

Translational data showed that innate and adaptive immunity in peripheral blood correlates with clinical benefit, with longer overall survival among patients with either monocyte activation (P = .0045) or T-cell activation (P = .012) compared with patients without activation of those components.

Taken together, the findings suggest that larger controlled studies of the combination are warranted, O’Day said.

The study was sponsored by Biothera and Merck. O’Day disclosed advisory board activities and research funding from both companies and others, and consulting for Biothera. Park disclosed royalties and consulting activities from several companies, not including the Imprime 1 sponsors.
 

This article first appeared on Medscape.com.

Cancer patients who received antitumor treatment within 14 days of COVID-19 diagnosis had an increased risk of severe events, according to data from three hospitals in Wuhan.

Patients with patchy consolidation at hospital admission also had an increased risk of severe events, defined as ICU admission, mechanical ventilation, or death.

However, these findings are limited by the small number of patients studied and the retrospective nature of the analysis, according to researchers.

Li Zhang, MD, PhD, of Tongji Hospital in Wuhan, China, presented this research at the AACR virtual meeting I. Some of the data were previously published in Annals of Oncology.

The researchers studied 28 patients with cancer among 1,276 patients with COVID-19 treated at three hospitals in Wuhan. The most common cancer types were lung (n = 7), esophageal (n = 4), and breast (n = 3). Patients had other gastrointestinal, gynecologic, genitourinary, and head and neck cancers as well.

The patients’ median age was 65 years (range, 56-70 years), 60.9% were men, 35.7% had stage IV cancer, and 28.6% had hospital-acquired COVID-19. Antitumor treatments included chemotherapy (n = 22), surgery (n = 21), radiotherapy (n = 21), targeted therapy (n = 5), and immune checkpoint inhibitors (n = 2).
 

COVID-19 treatment

Most patients (n = 22) received oxygen as their only respiratory intervention, although 10 received mechanical ventilation.

For systemic therapy, patients received antibiotic treatment (n = 23), corticosteroids (n = 15), intravenous immunoglobulin (n = 10), and tocilizumab (n = 1).

Antiviral treatments included umifenovir (n = 14), lopinavir/ritonavir (n = 10), ganciclovir (n = 9), ribavirin (n = 1), or a combination of antiviral drugs (n = 9).

“No cancer patients were enrolled in clinical trials, so no one received hydroxychloroquine or remdesivir,” Dr. Zhang noted.
 

Outcomes

In all, 15 patients (53.6%) had severe events. The median time from COVID-19 diagnosis to severe events was 7 days (range, 5-15 days).

A total of eight patients (28.6%) died – three with lung cancer, two with prostate cancer, one with liver cancer, one with rectal cancer, and one with testicular cancer.

Causes of death were acute respiratory distress syndrome (n = 5), septic shock (n = 1), suspected pulmonary embolism (n = 1), and acute myocardial infarction (n = 1).

By April 4, 14 patients had been discharged from the hospital, and 6 were still hospitalized. The median duration of hospitalization was 18.4 days for discharged patients and 29.4 days for patients still in hospital.

Follow-up CT scans showed improvement in 13 patients, no changes in 5 patients, and deterioration in 6 patients.
 

Factors associated with severe events

In a multivariable analysis, receiving antitumor treatment within 14 days of COVID-19 diagnosis was associated with severe events (hazard ratio, 4.079; P = .037).

However, only seven patients received antitumor treatments within 14 days of COVID-19 diagnosis – three chemotherapy, two targeted therapy, one radiotherapy, and one immune checkpoint inhibitor. Five of these seven patients had severe events.

Another factor associated with severe events in multivariable analysis was patchy consolidation on CT scan at admission (HR, 5.438; P = .01). Age and gender were not significantly associated with severe events.
 

Immune checkpoint inhibitors

Dr. Zhang and colleagues also analyzed a second group of cancer patients and their family members to determine if patients on immune checkpoint inhibitors have an increased risk of COVID-19.

This group included 124 cancer patients treated with immune checkpoint inhibitors for at least 2 months. The patients had a median age of 59 years (range, 54-65 years), and 61.8% were men. Most patients (95.2%) had stage IV cancer, and the most common cancers were lung (54.0%), esophageal (18.6%), and head and neck (10.7%).

In this group, only one cancer patient developed COVID-19 (via nosocomial infection). In another case, a patient’s spouse developed COVID-19, but the patient did not.

Dr. Zhang said this “limited information did not suggest cancer patients treated with immune checkpoint inhibitors were more vulnerable to COVID infection.”

Dr. Zhang and colleagues reported no conflicts of interest. This research was funded by the National Natural Science Foundation of China and Huazhong University of Science and Technology COVID-19 Rapid Response Call China.

jensmith@mdedge.com

SOURCE: Zhang L et al. Ann Oncol. 2020 Mar 26. doi: 10.1016/j.annonc.2020.03.296.

Cancer patients who received antitumor treatment within 14 days of COVID-19 diagnosis had an increased risk of severe events, according to data from three hospitals in Wuhan.

Patients with patchy consolidation at hospital admission also had an increased risk of severe events, defined as ICU admission, mechanical ventilation, or death.

However, these findings are limited by the small number of patients studied and the retrospective nature of the analysis, according to researchers.

Li Zhang, MD, PhD, of Tongji Hospital in Wuhan, China, presented this research at the AACR virtual meeting I. Some of the data were previously published in Annals of Oncology.

The researchers studied 28 patients with cancer among 1,276 patients with COVID-19 treated at three hospitals in Wuhan. The most common cancer types were lung (n = 7), esophageal (n = 4), and breast (n = 3). Patients had other gastrointestinal, gynecologic, genitourinary, and head and neck cancers as well.

The patients’ median age was 65 years (range, 56-70 years), 60.9% were men, 35.7% had stage IV cancer, and 28.6% had hospital-acquired COVID-19. Antitumor treatments included chemotherapy (n = 22), surgery (n = 21), radiotherapy (n = 21), targeted therapy (n = 5), and immune checkpoint inhibitors (n = 2).
 

COVID-19 treatment

Most patients (n = 22) received oxygen as their only respiratory intervention, although 10 received mechanical ventilation.

For systemic therapy, patients received antibiotic treatment (n = 23), corticosteroids (n = 15), intravenous immunoglobulin (n = 10), and tocilizumab (n = 1).

Antiviral treatments included umifenovir (n = 14), lopinavir/ritonavir (n = 10), ganciclovir (n = 9), ribavirin (n = 1), or a combination of antiviral drugs (n = 9).

“No cancer patients were enrolled in clinical trials, so no one received hydroxychloroquine or remdesivir,” Dr. Zhang noted.
 

Outcomes

In all, 15 patients (53.6%) had severe events. The median time from COVID-19 diagnosis to severe events was 7 days (range, 5-15 days).

A total of eight patients (28.6%) died – three with lung cancer, two with prostate cancer, one with liver cancer, one with rectal cancer, and one with testicular cancer.

Causes of death were acute respiratory distress syndrome (n = 5), septic shock (n = 1), suspected pulmonary embolism (n = 1), and acute myocardial infarction (n = 1).

By April 4, 14 patients had been discharged from the hospital, and 6 were still hospitalized. The median duration of hospitalization was 18.4 days for discharged patients and 29.4 days for patients still in hospital.

Follow-up CT scans showed improvement in 13 patients, no changes in 5 patients, and deterioration in 6 patients.
 

Factors associated with severe events

In a multivariable analysis, receiving antitumor treatment within 14 days of COVID-19 diagnosis was associated with severe events (hazard ratio, 4.079; P = .037).

However, only seven patients received antitumor treatments within 14 days of COVID-19 diagnosis – three chemotherapy, two targeted therapy, one radiotherapy, and one immune checkpoint inhibitor. Five of these seven patients had severe events.

Another factor associated with severe events in multivariable analysis was patchy consolidation on CT scan at admission (HR, 5.438; P = .01). Age and gender were not significantly associated with severe events.
 

Immune checkpoint inhibitors

Dr. Zhang and colleagues also analyzed a second group of cancer patients and their family members to determine if patients on immune checkpoint inhibitors have an increased risk of COVID-19.

This group included 124 cancer patients treated with immune checkpoint inhibitors for at least 2 months. The patients had a median age of 59 years (range, 54-65 years), and 61.8% were men. Most patients (95.2%) had stage IV cancer, and the most common cancers were lung (54.0%), esophageal (18.6%), and head and neck (10.7%).

In this group, only one cancer patient developed COVID-19 (via nosocomial infection). In another case, a patient’s spouse developed COVID-19, but the patient did not.

Dr. Zhang said this “limited information did not suggest cancer patients treated with immune checkpoint inhibitors were more vulnerable to COVID infection.”

Dr. Zhang and colleagues reported no conflicts of interest. This research was funded by the National Natural Science Foundation of China and Huazhong University of Science and Technology COVID-19 Rapid Response Call China.

jensmith@mdedge.com

SOURCE: Zhang L et al. Ann Oncol. 2020 Mar 26. doi: 10.1016/j.annonc.2020.03.296.

Cancer patients who received antitumor treatment within 14 days of COVID-19 diagnosis had an increased risk of severe events, according to data from three hospitals in Wuhan.

Patients with patchy consolidation at hospital admission also had an increased risk of severe events, defined as ICU admission, mechanical ventilation, or death.

However, these findings are limited by the small number of patients studied and the retrospective nature of the analysis, according to researchers.

Li Zhang, MD, PhD, of Tongji Hospital in Wuhan, China, presented this research at the AACR virtual meeting I. Some of the data were previously published in Annals of Oncology.

The researchers studied 28 patients with cancer among 1,276 patients with COVID-19 treated at three hospitals in Wuhan. The most common cancer types were lung (n = 7), esophageal (n = 4), and breast (n = 3). Patients had other gastrointestinal, gynecologic, genitourinary, and head and neck cancers as well.

The patients’ median age was 65 years (range, 56-70 years), 60.9% were men, 35.7% had stage IV cancer, and 28.6% had hospital-acquired COVID-19. Antitumor treatments included chemotherapy (n = 22), surgery (n = 21), radiotherapy (n = 21), targeted therapy (n = 5), and immune checkpoint inhibitors (n = 2).
 

COVID-19 treatment

Most patients (n = 22) received oxygen as their only respiratory intervention, although 10 received mechanical ventilation.

For systemic therapy, patients received antibiotic treatment (n = 23), corticosteroids (n = 15), intravenous immunoglobulin (n = 10), and tocilizumab (n = 1).

Antiviral treatments included umifenovir (n = 14), lopinavir/ritonavir (n = 10), ganciclovir (n = 9), ribavirin (n = 1), or a combination of antiviral drugs (n = 9).

“No cancer patients were enrolled in clinical trials, so no one received hydroxychloroquine or remdesivir,” Dr. Zhang noted.
 

Outcomes

In all, 15 patients (53.6%) had severe events. The median time from COVID-19 diagnosis to severe events was 7 days (range, 5-15 days).

A total of eight patients (28.6%) died – three with lung cancer, two with prostate cancer, one with liver cancer, one with rectal cancer, and one with testicular cancer.

Causes of death were acute respiratory distress syndrome (n = 5), septic shock (n = 1), suspected pulmonary embolism (n = 1), and acute myocardial infarction (n = 1).

By April 4, 14 patients had been discharged from the hospital, and 6 were still hospitalized. The median duration of hospitalization was 18.4 days for discharged patients and 29.4 days for patients still in hospital.

Follow-up CT scans showed improvement in 13 patients, no changes in 5 patients, and deterioration in 6 patients.
 

Factors associated with severe events

In a multivariable analysis, receiving antitumor treatment within 14 days of COVID-19 diagnosis was associated with severe events (hazard ratio, 4.079; P = .037).

However, only seven patients received antitumor treatments within 14 days of COVID-19 diagnosis – three chemotherapy, two targeted therapy, one radiotherapy, and one immune checkpoint inhibitor. Five of these seven patients had severe events.

Another factor associated with severe events in multivariable analysis was patchy consolidation on CT scan at admission (HR, 5.438; P = .01). Age and gender were not significantly associated with severe events.
 

Immune checkpoint inhibitors

Dr. Zhang and colleagues also analyzed a second group of cancer patients and their family members to determine if patients on immune checkpoint inhibitors have an increased risk of COVID-19.

This group included 124 cancer patients treated with immune checkpoint inhibitors for at least 2 months. The patients had a median age of 59 years (range, 54-65 years), and 61.8% were men. Most patients (95.2%) had stage IV cancer, and the most common cancers were lung (54.0%), esophageal (18.6%), and head and neck (10.7%).

In this group, only one cancer patient developed COVID-19 (via nosocomial infection). In another case, a patient’s spouse developed COVID-19, but the patient did not.

Dr. Zhang said this “limited information did not suggest cancer patients treated with immune checkpoint inhibitors were more vulnerable to COVID infection.”

Dr. Zhang and colleagues reported no conflicts of interest. This research was funded by the National Natural Science Foundation of China and Huazhong University of Science and Technology COVID-19 Rapid Response Call China.

jensmith@mdedge.com

SOURCE: Zhang L et al. Ann Oncol. 2020 Mar 26. doi: 10.1016/j.annonc.2020.03.296.

Registry data suggest an “unexpectedly high” mortality rate among patients with thoracic cancers who develop COVID-19, according to a presenter at the AACR virtual meeting I.

Mongkolchon Akesin/Shutterstock

Data from the TERAVOLT registry showed a 34.6% mortality rate among 200 patients with COVID-19 and thoracic cancer, according to Marina Chiara Garassino, MD, of Fondazione IRCCS Instituto Nazionale dei Tumor in Milan, Italy, who presented the data at the meeting in a session on cancer and COVID-19.

Cancer patients infected with COVID-19 have been reported to be at increased risk of death, but the magnitude of increase is uncertain (Lancet Oncol. 2020 Mar;21[3]:335-7; JAMA. 2020 Mar 23. doi: 10.1001/jama.2020.4683).

Patients with thoracic cancer may be particularly vulnerable because of older age, tobacco use, preexisting cardiopulmonary comorbidities, and the immunosuppressive effects of treatment.

The global TERAVOLT registry was begun in late March 2020 to provide outcome data for coronavirus infections in thoracic cancer patients specifically. It is hoped that the data collected will guide patient management and define factors influencing morbidity and mortality.

Dr. Garassino said institutions from 21 countries have joined the TERAVOLT registry thus far. Currently, about 17 new patients with thoracic cancer and laboratory confirmed or clinically suspected COVID-19 are added to the registry each week.

As of April 12, 2020, there were 200 patients included in the registry. Their median age was 68 years, and 70.5% were men. Non–small cell lung cancer was the histology in 75.5% and small-cell lung cancer in 14.5% of patients. Most patients (73.5%) had stage IV disease. Approximately 27% of patients had at least three comorbid conditions.

About 74% of patients were on current cancer treatment, with 19% on tyrosine kinase inhibitors alone, 32.7% on chemotherapy alone, 23.1% on immunotherapy alone, and 13.6% on chemotherapy plus immunotherapy.

In all, 152 patients (76.0%) were hospitalized. However, 91.2% of patients were not admitted to the ICU, either because of a shortage of equipment or institutional policy.

The most common complications were pneumonia/pneumonitis (79.6%), acute respiratory distress syndrome (26.8%), multiorgan failure (7.6%), and sepsis (5.1%).

A total of 66 patients (34.6%) died. Most deaths were attributed to COVID-19 and not the underlying cancer, Dr. Garassino said.

A univariate analysis showed no association between cancer treatment and an increased risk of hospitalization or death. However, Dr. Garassino and colleagues are collecting more data to confirm these results.

In a multivariate analysis, no factors were associated with the risk of death, although data from a larger number of patients may shed more light on that issue.

TERAVOLT will continue to collect and provide data to identify characteristics associated with severe COVID-19–related illness, to guide physicians with information applicable to patients with thoracic malignancies, tailored to individual risk.

Like the COVID-19 and Cancer Consortium and the ESMO CoCare registry, TERAVOLT represents a way for the patient care and translational science communities to share lessons from the COVID-19 pandemic.

AACR plans to help share those lessons as well, in another session on COVID-19 and cancer at the AACR virtual meeting II in June and at a conference on COVID-19 and cancer in July, according to session moderator Antoni Ribas, MD, PhD, of the University of California, Los Angeles.

Dr. Garassino disclosed relationships with AstraZeneca, Bristol-Myers Squibb, Boehringer Ingelheim, and other companies.

Dr. Lyss was a community-based medical oncologist and clinical researcher for more than 35 years before his recent retirement. His clinical and research interests were focused on breast and lung cancers as well as expanding clinical trial access to medically underserved populations. He is based in St. Louis. He has no conflicts of interest.

Registry data suggest an “unexpectedly high” mortality rate among patients with thoracic cancers who develop COVID-19, according to a presenter at the AACR virtual meeting I.

Mongkolchon Akesin/Shutterstock

Data from the TERAVOLT registry showed a 34.6% mortality rate among 200 patients with COVID-19 and thoracic cancer, according to Marina Chiara Garassino, MD, of Fondazione IRCCS Instituto Nazionale dei Tumor in Milan, Italy, who presented the data at the meeting in a session on cancer and COVID-19.

Cancer patients infected with COVID-19 have been reported to be at increased risk of death, but the magnitude of increase is uncertain (Lancet Oncol. 2020 Mar;21[3]:335-7; JAMA. 2020 Mar 23. doi: 10.1001/jama.2020.4683).

Patients with thoracic cancer may be particularly vulnerable because of older age, tobacco use, preexisting cardiopulmonary comorbidities, and the immunosuppressive effects of treatment.

The global TERAVOLT registry was begun in late March 2020 to provide outcome data for coronavirus infections in thoracic cancer patients specifically. It is hoped that the data collected will guide patient management and define factors influencing morbidity and mortality.

Dr. Garassino said institutions from 21 countries have joined the TERAVOLT registry thus far. Currently, about 17 new patients with thoracic cancer and laboratory confirmed or clinically suspected COVID-19 are added to the registry each week.

As of April 12, 2020, there were 200 patients included in the registry. Their median age was 68 years, and 70.5% were men. Non–small cell lung cancer was the histology in 75.5% and small-cell lung cancer in 14.5% of patients. Most patients (73.5%) had stage IV disease. Approximately 27% of patients had at least three comorbid conditions.

About 74% of patients were on current cancer treatment, with 19% on tyrosine kinase inhibitors alone, 32.7% on chemotherapy alone, 23.1% on immunotherapy alone, and 13.6% on chemotherapy plus immunotherapy.

In all, 152 patients (76.0%) were hospitalized. However, 91.2% of patients were not admitted to the ICU, either because of a shortage of equipment or institutional policy.

The most common complications were pneumonia/pneumonitis (79.6%), acute respiratory distress syndrome (26.8%), multiorgan failure (7.6%), and sepsis (5.1%).

A total of 66 patients (34.6%) died. Most deaths were attributed to COVID-19 and not the underlying cancer, Dr. Garassino said.

A univariate analysis showed no association between cancer treatment and an increased risk of hospitalization or death. However, Dr. Garassino and colleagues are collecting more data to confirm these results.

In a multivariate analysis, no factors were associated with the risk of death, although data from a larger number of patients may shed more light on that issue.

TERAVOLT will continue to collect and provide data to identify characteristics associated with severe COVID-19–related illness, to guide physicians with information applicable to patients with thoracic malignancies, tailored to individual risk.

Like the COVID-19 and Cancer Consortium and the ESMO CoCare registry, TERAVOLT represents a way for the patient care and translational science communities to share lessons from the COVID-19 pandemic.

AACR plans to help share those lessons as well, in another session on COVID-19 and cancer at the AACR virtual meeting II in June and at a conference on COVID-19 and cancer in July, according to session moderator Antoni Ribas, MD, PhD, of the University of California, Los Angeles.

Dr. Garassino disclosed relationships with AstraZeneca, Bristol-Myers Squibb, Boehringer Ingelheim, and other companies.

Dr. Lyss was a community-based medical oncologist and clinical researcher for more than 35 years before his recent retirement. His clinical and research interests were focused on breast and lung cancers as well as expanding clinical trial access to medically underserved populations. He is based in St. Louis. He has no conflicts of interest.

Registry data suggest an “unexpectedly high” mortality rate among patients with thoracic cancers who develop COVID-19, according to a presenter at the AACR virtual meeting I.

Mongkolchon Akesin/Shutterstock

Data from the TERAVOLT registry showed a 34.6% mortality rate among 200 patients with COVID-19 and thoracic cancer, according to Marina Chiara Garassino, MD, of Fondazione IRCCS Instituto Nazionale dei Tumor in Milan, Italy, who presented the data at the meeting in a session on cancer and COVID-19.

Cancer patients infected with COVID-19 have been reported to be at increased risk of death, but the magnitude of increase is uncertain (Lancet Oncol. 2020 Mar;21[3]:335-7; JAMA. 2020 Mar 23. doi: 10.1001/jama.2020.4683).

Patients with thoracic cancer may be particularly vulnerable because of older age, tobacco use, preexisting cardiopulmonary comorbidities, and the immunosuppressive effects of treatment.

The global TERAVOLT registry was begun in late March 2020 to provide outcome data for coronavirus infections in thoracic cancer patients specifically. It is hoped that the data collected will guide patient management and define factors influencing morbidity and mortality.

Dr. Garassino said institutions from 21 countries have joined the TERAVOLT registry thus far. Currently, about 17 new patients with thoracic cancer and laboratory confirmed or clinically suspected COVID-19 are added to the registry each week.

As of April 12, 2020, there were 200 patients included in the registry. Their median age was 68 years, and 70.5% were men. Non–small cell lung cancer was the histology in 75.5% and small-cell lung cancer in 14.5% of patients. Most patients (73.5%) had stage IV disease. Approximately 27% of patients had at least three comorbid conditions.

About 74% of patients were on current cancer treatment, with 19% on tyrosine kinase inhibitors alone, 32.7% on chemotherapy alone, 23.1% on immunotherapy alone, and 13.6% on chemotherapy plus immunotherapy.

In all, 152 patients (76.0%) were hospitalized. However, 91.2% of patients were not admitted to the ICU, either because of a shortage of equipment or institutional policy.

The most common complications were pneumonia/pneumonitis (79.6%), acute respiratory distress syndrome (26.8%), multiorgan failure (7.6%), and sepsis (5.1%).

A total of 66 patients (34.6%) died. Most deaths were attributed to COVID-19 and not the underlying cancer, Dr. Garassino said.

A univariate analysis showed no association between cancer treatment and an increased risk of hospitalization or death. However, Dr. Garassino and colleagues are collecting more data to confirm these results.

In a multivariate analysis, no factors were associated with the risk of death, although data from a larger number of patients may shed more light on that issue.

TERAVOLT will continue to collect and provide data to identify characteristics associated with severe COVID-19–related illness, to guide physicians with information applicable to patients with thoracic malignancies, tailored to individual risk.

Like the COVID-19 and Cancer Consortium and the ESMO CoCare registry, TERAVOLT represents a way for the patient care and translational science communities to share lessons from the COVID-19 pandemic.

AACR plans to help share those lessons as well, in another session on COVID-19 and cancer at the AACR virtual meeting II in June and at a conference on COVID-19 and cancer in July, according to session moderator Antoni Ribas, MD, PhD, of the University of California, Los Angeles.

Dr. Garassino disclosed relationships with AstraZeneca, Bristol-Myers Squibb, Boehringer Ingelheim, and other companies.

Dr. Lyss was a community-based medical oncologist and clinical researcher for more than 35 years before his recent retirement. His clinical and research interests were focused on breast and lung cancers as well as expanding clinical trial access to medically underserved populations. He is based in St. Louis. He has no conflicts of interest.