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Novel Treatment Combo Ups Survival in Multiple Myeloma
Adding teclistamab to daratumumab dramatically improved progression-free survival and overall survival vs standard-of-care (SOC) therapy in patients with relapsed or refractory multiple myeloma (RRMM) in the phase 3 MajesTEC-3 trial.
At median follow-up of 34.5 months, progression-free survival was not reached in study participants randomized to receive teclistamab plus daratumumab (Tec-Dara). Starkly contrasting that was the 18.1 months progression-free survival among those randomized to a control group who received the standard of care: investigator’s choice of daratumumab and dexamethasone plus either pomalidomide or bortezomib (DPd/DVd (hazard ratio [HR], 0.17). Overall survival also significantly favored Tec-Dara (HR, 0.46).
Lead investigator María-Victoria Mateos, MD, PhD, reported the findings in a late-breaking abstract session at American Society of Hematology (ASH) 2025 Annual Meeting. They were published simultaneously in The New England Journal of Medicine.
“[Tec-Dara in this setting] generated the greatest progression-free survival treatment effect to date [in RRMR] with a plateau phase after 6 months of therapy, suggesting potential for functional cure,” said Mateos, a consultant physician and associate professor at the University of Salamanca, Salamanca, Spain.
“We consider that this synergistic immunotherapy combination…is a new potential standard of care for relapsed or refractory multiple myeloma after at least on prior line of therapy, with broad potential across academic and community settings,” added Mateos, who also directs the Multiple Myeloma Program at the University.
Based on the MajesTEC-3 findings, the FDA proactively awarded a national priority voucher to Tec-Dara under the Commissioner’s National Priority Voucher pilot program designed to accelerate the review of certain promising products.
About Tec-Dara
Teclistamab (Tecvayli) is an off-the-shelf first-in-class bispecific monoclonal antibody shown in the MajesTEC-1 trial to provide deep, durable responses in RRMM, with improved efficacy and safety with earlier lines of therapy. The FDA approved the agent for use in 4th or greater lines of therapy in 2022 based on those findings.
Daratumumab (Darzalex) is a widely used anti-CD38 monoclonal antibody currently considered the SOC therapy for RRMM. Both agents are products of the Janssen Pharmaceutical Companies of Johnson & Johnson.
Although front-line therapy for multiple myeloma has dramatically improved, there is a need for new, more effective treatment strategies in patients with disease progression, Mateos noted.
Therefore, she and her colleagues conducted MajesTEC-3, a randomized trial exploring the fully immunotherapy-based regimen of Tec-Dara vs daratumumab-based SOC in patients who had received one to three prior lines of therapy, including a proteasome inhibitor and lenalidomide (Len).
The study was the first to test a bispecific monoclonal antibody as early as the first relapse after initial treatment, she noted.
About MajesTEC-3
Study participants were 587 adults aged 25-88 years. Those with one prior line of therapy were required to be Len-refractory with progressive disease on or after the last therapy. Prior anti-CD-38 Patients with prior B-cell maturation antigen-directed therapy or who were refractory to anti-CD38 treatment were excluded.
The 291 patients randomized to the Tec-Dara treatment group and 296 randomized to the control group were treated in 28-day cycles according to the standard daratumumab schedule: weekly treatment during cycles 1 and 2, biweekly treatment during cycles 3-6, and monthly treatments beginning with cycle 7.
Teclistamab was initiated with an approved step-up dose school followed by 1.5 mg/kg weekly in cycles 1 and 2, 3 mg/kg biweekly in cycles 3-6, and 3 mg/kg monthly beginning with cycle 7.
The 36-month progression-free survival rates with Tec-Dara vs DPd/DVd were 83.4% and 29.7%, with the 36-month overall survival rates having been 83.3% and 65.0%. More than 90% of patients in the Tec-Dara group who were alive at 6 months were also alive at 30 months, Mateos noted.
For both progression-free survival and overall survival, the “clinically remarkable and statistically significant” differences were apparent across all prespecified and clinically relevant subgroups, she added. These included patients who were 75 years or older, Len-refractory patients, and those with high-risk cytogenetics, ≥ 60% bone marrow plasma cells, soft-tissue plasmacytomas, and anti-CD38 exposure.
Patients receiving Tec-Dara also had significantly higher rates of complete or better responses (81.8% vs 32.1%; odds ratio [OR], 9.56), overall response (89.0% vs 75.3%; OR, 2.65), and minimal residual disease-negativity (58.4% vs 17.1%; OR, 6.78).
The median time to first response and first complete or better response was similar in the two groups, but 36-month duration of response was 88.5 vs 36.4 months. At data cutoff, 49.4% of patients remained on study treatment — 71.0% in the Tec-Dara group and 28.3% in the DPd/DVd group, and median treatment duration was twice as long with Tec-Dara (32.4 vs 16.1 months), she said.
Serious adverse events occurred at similar rates in the treatment and control groups (70.7% and 62.4%) and most (44.2%) were grade 1 cytokine release syndrome (CRS). No grade 3 CRS occurred, and all CRS cases resolved.
Immune effector-cell-associated neurotoxicity occurred in 1.1% of patients, and all cases resolved.
Treatment-related adverse events leading to discontinuation occurred in 4.6% and 5.5% of patients in the Tec-Dara and DPd/DVd groups. The rates of deaths due to treatment-emergent adverse events were also similar in the groups (7.1% vs 5.9%).
Infections of any grade occurred in 96.5% and 84.1% of Tec-Dara and DPd/DVd patients, and grade 3/4 infections occurred in 54.1% and 43.4%. New-onset grade 3 or greater infections decreased over time.
“It’s important to acknowledge that patients with infections needed to be supported with adequate prophylaxis and immunoglobulins,” Mateo stressed.
Implications for Patients With RRMM
Teclistamab is currently only approved after three prior lines of therapy, but under the FDA Commissioner’s National Priority Voucher program, the agency will aim to complete its review of Tec-Dara for earlier treatment within 1-2 months following submission of an application for approval by Johnson & Johnson.
If an approval for that indication were to occur, it would be transformative for patients with RRMM, said Michael Rosenzweig, MD, of City of Hope, Duarte, California, in an interview with Medscape Medical News.
The [MajesTEC-3] findings suggest that Tec-Dar “really gives patients a chance at long-term disease control,” added Rosenzweig, chief of the Division of Multiple Myeloma, and an associate professor in the Department of Hematology & Hematopoietic Cell Transplantation at City of Hope.
MajesTEC-3 was funded by Johnson & Johnson. Mateos disclosed relationships with numerous pharmaceutical companies, including Johnson & Johnson. Rosenzweig reported consulting for Johnson & Johnson and was previously on the company’s speakers bureau.
Sharon Worcester, MA, is an award-winning medical journalist based in Birmingham, Alabama, writing for Medscape, MDedge, and other affiliate sites. She currently covers oncology, but she has also written on a variety of other medical specialties and health care topics. She can be reached at [email protected] or on X: @SW_MedReporter.
Adding teclistamab to daratumumab dramatically improved progression-free survival and overall survival vs standard-of-care (SOC) therapy in patients with relapsed or refractory multiple myeloma (RRMM) in the phase 3 MajesTEC-3 trial.
At median follow-up of 34.5 months, progression-free survival was not reached in study participants randomized to receive teclistamab plus daratumumab (Tec-Dara). Starkly contrasting that was the 18.1 months progression-free survival among those randomized to a control group who received the standard of care: investigator’s choice of daratumumab and dexamethasone plus either pomalidomide or bortezomib (DPd/DVd (hazard ratio [HR], 0.17). Overall survival also significantly favored Tec-Dara (HR, 0.46).
Lead investigator María-Victoria Mateos, MD, PhD, reported the findings in a late-breaking abstract session at American Society of Hematology (ASH) 2025 Annual Meeting. They were published simultaneously in The New England Journal of Medicine.
“[Tec-Dara in this setting] generated the greatest progression-free survival treatment effect to date [in RRMR] with a plateau phase after 6 months of therapy, suggesting potential for functional cure,” said Mateos, a consultant physician and associate professor at the University of Salamanca, Salamanca, Spain.
“We consider that this synergistic immunotherapy combination…is a new potential standard of care for relapsed or refractory multiple myeloma after at least on prior line of therapy, with broad potential across academic and community settings,” added Mateos, who also directs the Multiple Myeloma Program at the University.
Based on the MajesTEC-3 findings, the FDA proactively awarded a national priority voucher to Tec-Dara under the Commissioner’s National Priority Voucher pilot program designed to accelerate the review of certain promising products.
About Tec-Dara
Teclistamab (Tecvayli) is an off-the-shelf first-in-class bispecific monoclonal antibody shown in the MajesTEC-1 trial to provide deep, durable responses in RRMM, with improved efficacy and safety with earlier lines of therapy. The FDA approved the agent for use in 4th or greater lines of therapy in 2022 based on those findings.
Daratumumab (Darzalex) is a widely used anti-CD38 monoclonal antibody currently considered the SOC therapy for RRMM. Both agents are products of the Janssen Pharmaceutical Companies of Johnson & Johnson.
Although front-line therapy for multiple myeloma has dramatically improved, there is a need for new, more effective treatment strategies in patients with disease progression, Mateos noted.
Therefore, she and her colleagues conducted MajesTEC-3, a randomized trial exploring the fully immunotherapy-based regimen of Tec-Dara vs daratumumab-based SOC in patients who had received one to three prior lines of therapy, including a proteasome inhibitor and lenalidomide (Len).
The study was the first to test a bispecific monoclonal antibody as early as the first relapse after initial treatment, she noted.
About MajesTEC-3
Study participants were 587 adults aged 25-88 years. Those with one prior line of therapy were required to be Len-refractory with progressive disease on or after the last therapy. Prior anti-CD-38 Patients with prior B-cell maturation antigen-directed therapy or who were refractory to anti-CD38 treatment were excluded.
The 291 patients randomized to the Tec-Dara treatment group and 296 randomized to the control group were treated in 28-day cycles according to the standard daratumumab schedule: weekly treatment during cycles 1 and 2, biweekly treatment during cycles 3-6, and monthly treatments beginning with cycle 7.
Teclistamab was initiated with an approved step-up dose school followed by 1.5 mg/kg weekly in cycles 1 and 2, 3 mg/kg biweekly in cycles 3-6, and 3 mg/kg monthly beginning with cycle 7.
The 36-month progression-free survival rates with Tec-Dara vs DPd/DVd were 83.4% and 29.7%, with the 36-month overall survival rates having been 83.3% and 65.0%. More than 90% of patients in the Tec-Dara group who were alive at 6 months were also alive at 30 months, Mateos noted.
For both progression-free survival and overall survival, the “clinically remarkable and statistically significant” differences were apparent across all prespecified and clinically relevant subgroups, she added. These included patients who were 75 years or older, Len-refractory patients, and those with high-risk cytogenetics, ≥ 60% bone marrow plasma cells, soft-tissue plasmacytomas, and anti-CD38 exposure.
Patients receiving Tec-Dara also had significantly higher rates of complete or better responses (81.8% vs 32.1%; odds ratio [OR], 9.56), overall response (89.0% vs 75.3%; OR, 2.65), and minimal residual disease-negativity (58.4% vs 17.1%; OR, 6.78).
The median time to first response and first complete or better response was similar in the two groups, but 36-month duration of response was 88.5 vs 36.4 months. At data cutoff, 49.4% of patients remained on study treatment — 71.0% in the Tec-Dara group and 28.3% in the DPd/DVd group, and median treatment duration was twice as long with Tec-Dara (32.4 vs 16.1 months), she said.
Serious adverse events occurred at similar rates in the treatment and control groups (70.7% and 62.4%) and most (44.2%) were grade 1 cytokine release syndrome (CRS). No grade 3 CRS occurred, and all CRS cases resolved.
Immune effector-cell-associated neurotoxicity occurred in 1.1% of patients, and all cases resolved.
Treatment-related adverse events leading to discontinuation occurred in 4.6% and 5.5% of patients in the Tec-Dara and DPd/DVd groups. The rates of deaths due to treatment-emergent adverse events were also similar in the groups (7.1% vs 5.9%).
Infections of any grade occurred in 96.5% and 84.1% of Tec-Dara and DPd/DVd patients, and grade 3/4 infections occurred in 54.1% and 43.4%. New-onset grade 3 or greater infections decreased over time.
“It’s important to acknowledge that patients with infections needed to be supported with adequate prophylaxis and immunoglobulins,” Mateo stressed.
Implications for Patients With RRMM
Teclistamab is currently only approved after three prior lines of therapy, but under the FDA Commissioner’s National Priority Voucher program, the agency will aim to complete its review of Tec-Dara for earlier treatment within 1-2 months following submission of an application for approval by Johnson & Johnson.
If an approval for that indication were to occur, it would be transformative for patients with RRMM, said Michael Rosenzweig, MD, of City of Hope, Duarte, California, in an interview with Medscape Medical News.
The [MajesTEC-3] findings suggest that Tec-Dar “really gives patients a chance at long-term disease control,” added Rosenzweig, chief of the Division of Multiple Myeloma, and an associate professor in the Department of Hematology & Hematopoietic Cell Transplantation at City of Hope.
MajesTEC-3 was funded by Johnson & Johnson. Mateos disclosed relationships with numerous pharmaceutical companies, including Johnson & Johnson. Rosenzweig reported consulting for Johnson & Johnson and was previously on the company’s speakers bureau.
Sharon Worcester, MA, is an award-winning medical journalist based in Birmingham, Alabama, writing for Medscape, MDedge, and other affiliate sites. She currently covers oncology, but she has also written on a variety of other medical specialties and health care topics. She can be reached at [email protected] or on X: @SW_MedReporter.
Adding teclistamab to daratumumab dramatically improved progression-free survival and overall survival vs standard-of-care (SOC) therapy in patients with relapsed or refractory multiple myeloma (RRMM) in the phase 3 MajesTEC-3 trial.
At median follow-up of 34.5 months, progression-free survival was not reached in study participants randomized to receive teclistamab plus daratumumab (Tec-Dara). Starkly contrasting that was the 18.1 months progression-free survival among those randomized to a control group who received the standard of care: investigator’s choice of daratumumab and dexamethasone plus either pomalidomide or bortezomib (DPd/DVd (hazard ratio [HR], 0.17). Overall survival also significantly favored Tec-Dara (HR, 0.46).
Lead investigator María-Victoria Mateos, MD, PhD, reported the findings in a late-breaking abstract session at American Society of Hematology (ASH) 2025 Annual Meeting. They were published simultaneously in The New England Journal of Medicine.
“[Tec-Dara in this setting] generated the greatest progression-free survival treatment effect to date [in RRMR] with a plateau phase after 6 months of therapy, suggesting potential for functional cure,” said Mateos, a consultant physician and associate professor at the University of Salamanca, Salamanca, Spain.
“We consider that this synergistic immunotherapy combination…is a new potential standard of care for relapsed or refractory multiple myeloma after at least on prior line of therapy, with broad potential across academic and community settings,” added Mateos, who also directs the Multiple Myeloma Program at the University.
Based on the MajesTEC-3 findings, the FDA proactively awarded a national priority voucher to Tec-Dara under the Commissioner’s National Priority Voucher pilot program designed to accelerate the review of certain promising products.
About Tec-Dara
Teclistamab (Tecvayli) is an off-the-shelf first-in-class bispecific monoclonal antibody shown in the MajesTEC-1 trial to provide deep, durable responses in RRMM, with improved efficacy and safety with earlier lines of therapy. The FDA approved the agent for use in 4th or greater lines of therapy in 2022 based on those findings.
Daratumumab (Darzalex) is a widely used anti-CD38 monoclonal antibody currently considered the SOC therapy for RRMM. Both agents are products of the Janssen Pharmaceutical Companies of Johnson & Johnson.
Although front-line therapy for multiple myeloma has dramatically improved, there is a need for new, more effective treatment strategies in patients with disease progression, Mateos noted.
Therefore, she and her colleagues conducted MajesTEC-3, a randomized trial exploring the fully immunotherapy-based regimen of Tec-Dara vs daratumumab-based SOC in patients who had received one to three prior lines of therapy, including a proteasome inhibitor and lenalidomide (Len).
The study was the first to test a bispecific monoclonal antibody as early as the first relapse after initial treatment, she noted.
About MajesTEC-3
Study participants were 587 adults aged 25-88 years. Those with one prior line of therapy were required to be Len-refractory with progressive disease on or after the last therapy. Prior anti-CD-38 Patients with prior B-cell maturation antigen-directed therapy or who were refractory to anti-CD38 treatment were excluded.
The 291 patients randomized to the Tec-Dara treatment group and 296 randomized to the control group were treated in 28-day cycles according to the standard daratumumab schedule: weekly treatment during cycles 1 and 2, biweekly treatment during cycles 3-6, and monthly treatments beginning with cycle 7.
Teclistamab was initiated with an approved step-up dose school followed by 1.5 mg/kg weekly in cycles 1 and 2, 3 mg/kg biweekly in cycles 3-6, and 3 mg/kg monthly beginning with cycle 7.
The 36-month progression-free survival rates with Tec-Dara vs DPd/DVd were 83.4% and 29.7%, with the 36-month overall survival rates having been 83.3% and 65.0%. More than 90% of patients in the Tec-Dara group who were alive at 6 months were also alive at 30 months, Mateos noted.
For both progression-free survival and overall survival, the “clinically remarkable and statistically significant” differences were apparent across all prespecified and clinically relevant subgroups, she added. These included patients who were 75 years or older, Len-refractory patients, and those with high-risk cytogenetics, ≥ 60% bone marrow plasma cells, soft-tissue plasmacytomas, and anti-CD38 exposure.
Patients receiving Tec-Dara also had significantly higher rates of complete or better responses (81.8% vs 32.1%; odds ratio [OR], 9.56), overall response (89.0% vs 75.3%; OR, 2.65), and minimal residual disease-negativity (58.4% vs 17.1%; OR, 6.78).
The median time to first response and first complete or better response was similar in the two groups, but 36-month duration of response was 88.5 vs 36.4 months. At data cutoff, 49.4% of patients remained on study treatment — 71.0% in the Tec-Dara group and 28.3% in the DPd/DVd group, and median treatment duration was twice as long with Tec-Dara (32.4 vs 16.1 months), she said.
Serious adverse events occurred at similar rates in the treatment and control groups (70.7% and 62.4%) and most (44.2%) were grade 1 cytokine release syndrome (CRS). No grade 3 CRS occurred, and all CRS cases resolved.
Immune effector-cell-associated neurotoxicity occurred in 1.1% of patients, and all cases resolved.
Treatment-related adverse events leading to discontinuation occurred in 4.6% and 5.5% of patients in the Tec-Dara and DPd/DVd groups. The rates of deaths due to treatment-emergent adverse events were also similar in the groups (7.1% vs 5.9%).
Infections of any grade occurred in 96.5% and 84.1% of Tec-Dara and DPd/DVd patients, and grade 3/4 infections occurred in 54.1% and 43.4%. New-onset grade 3 or greater infections decreased over time.
“It’s important to acknowledge that patients with infections needed to be supported with adequate prophylaxis and immunoglobulins,” Mateo stressed.
Implications for Patients With RRMM
Teclistamab is currently only approved after three prior lines of therapy, but under the FDA Commissioner’s National Priority Voucher program, the agency will aim to complete its review of Tec-Dara for earlier treatment within 1-2 months following submission of an application for approval by Johnson & Johnson.
If an approval for that indication were to occur, it would be transformative for patients with RRMM, said Michael Rosenzweig, MD, of City of Hope, Duarte, California, in an interview with Medscape Medical News.
The [MajesTEC-3] findings suggest that Tec-Dar “really gives patients a chance at long-term disease control,” added Rosenzweig, chief of the Division of Multiple Myeloma, and an associate professor in the Department of Hematology & Hematopoietic Cell Transplantation at City of Hope.
MajesTEC-3 was funded by Johnson & Johnson. Mateos disclosed relationships with numerous pharmaceutical companies, including Johnson & Johnson. Rosenzweig reported consulting for Johnson & Johnson and was previously on the company’s speakers bureau.
Sharon Worcester, MA, is an award-winning medical journalist based in Birmingham, Alabama, writing for Medscape, MDedge, and other affiliate sites. She currently covers oncology, but she has also written on a variety of other medical specialties and health care topics. She can be reached at [email protected] or on X: @SW_MedReporter.
Novel Treatment Combo Ups Survival in Multiple Myeloma
Novel Treatment Combo Ups Survival in Multiple Myeloma