Food and Drug Administration approved brentuximab vedotin (ADCETRIS, Seattle Genetics Inc.) in combination with chemotherapy for previously untreated systemic anaplastic large cell lymphoma (sALCL) or other CD30-expressing peripheral T-cell lymphomas (PTCL), including angioimmunoblastic T-cell lymphoma and PTCL not otherwise specified. This is the first FDA approval for previously untreated PTCL including sALCL.
Approval was based on ECHELON-2 (NCT01777152), a double-blind, multicenter trial that randomized 226 patients to brentuximab vedotin plus cyclophosphamide, doxorubicin, and prednisone (CHP) and 226 patients to cyclophosphamide, doxorubicin, vincristine, and prednisone (CHOP).
Efficacy was based on independent review facility-assessed progression-free survival (PFS), defined as time from randomization to progression, death due to any cause, or receipt of subsequent anticancer chemotherapy to treat residual or progressive disease. The median PFS was 48.2 months (95% CI: 35.2, not estimable) for patients on the brentuximab vedotin + CHP arm and 20.8 months (95% CI: 12.7, 47.6) for those on the CHOP arm (hazard ratio 0.71; 95% CI: 0.54, 0.93; p=0.011).
The clinical trial also demonstrated improvement in overall survival (HR 0.66; 95%CI 0.46, 0.95; p=0.024), complete response rates (68% vs 56%, p=0.007), and overall response rates (83% vs 72%, p=0.003).
The most common adverse reactions (incidence ≥ 20%) observed ≥ 2% more in patients receiving brentuximab vedotin + CHP were nausea, diarrhea, fatigue or asthenia, mucositis, pyrexia, vomiting, and anemia. Peripheral neuropathy occurred in 52% of patients on the brentuximab vedotin + CHP arm and 55% on the CHOP arm.
The recommended brentuximab vedotin dose in combination with chemotherapy for previously untreated PTCL is 1.8 mg/kg (maximum of 180 mg) every 3 weeks for 6 to 8 doses. Administer GCSF prophylaxis starting in cycle 1