alexa Brentuximab vedotin demonstrates objective responses in a phase 2 study of relapsed refractory DLBCL with variable CD30 expression.
Haematology

Haematology

Journal of Hematology & Thromboembolic Diseases

Author(s): Jacobsen ED, Sharman JP, Oki Y, Advani RH, Winter JN,

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Abstract Several non-Hodgkin lymphoma (NHL) subtypes, including diffuse large B-cell lymphoma (DLBCL), variably express CD30. This phase 2, open-label study evaluated the efficacy of brentuximab vedotin, an anti-CD30 antibody-drug conjugate, in relapsed/refractory CD30(+) NHL. This planned subset analysis of B-cell NHLs includes 49 patients with DLBCL and 19 with other B-cell NHLs. Objective response rate was 44\% for DLBCL, including 8 (17\%) complete remissions (CRs) with a median duration of 16.6 months thus far (range, 2.7 to 22.7+ months). There was no statistical correlation between response and level of CD30 expression; however, all responding patients had quantifiable CD30 by computer-assisted assessment of immunohistochemistry. DLBCL patients were generally refractory to first-line (76\%) and most recent therapies (82\%), and 44\% of these refractory patients responded (15\% CRs). Patients with other B-cell lymphomas also responded: 1 CR, 2 partial responses (PRs) of 6 with gray zone, 1 CR of 6 with primary mediastinal B-cell, and 1 CR of 3 with posttransplant lymphoproliferative disorder. Adverse events were consistent with known toxicities. The combination of brentuximab vedotin with rituximab was generally well tolerated and had activity similar to brentuximab vedotin alone. Overall, significant activity with brentuximab vedotin was observed in relapsed/refractory DLBCL, and responses occurred across a range of CD30 expression. This study was registered at www.clinicaltrials.gov as #NCT01421667. © 2015 by The American Society of Hematology. This article was published in Blood and referenced in Journal of Hematology & Thromboembolic Diseases

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