CHICAGO--(BUSINESS WIRE)--

Seattle Genetics, Inc. (SGEN) today announced that data from several clinical trials of ADCETRIS (brentuximab vedotin) will be presented at the 2012 American Society of Clinical Oncology (ASCO) Annual Meeting being held June 1-5, 2012 in Chicago, IL. Data demonstrate the activity and tolerability when patients are retreated with ADCETRIS, the activity and tolerability of ADCETRIS in CD30-positive non-Hodgkin lymphomas and CD30 expression from a screening protocol in non-lymphoma malignancies. ADCETRIS is an antibody-drug conjugate (ADC) directed to CD30.

Our goal is for ADCETRIS to become the foundation of therapy for CD30-positive malignancies and, to that end, we are aggressively investing in its clinical development and broadly exploring CD30 expression across numerous cancer types, said Clay B. Siegall, Ph.D., President and Chief Executive Officer of Seattle Genetics. Our data presentations at ASCO highlight the potential for ADCETRIS and reinforce our development strategy to generate data that will support stepwise growth of ADCETRIS for patients with CD30-expressing malignancies.

Retreatment with brentuximab vedotin in CD30-positive hematologic malignancies: a phase II study (Abstract #8027)

In a phase II trial, patients who previously responded to treatment with ADCETRIS, then discontinued treatment and subsequently had disease progression or relapse were eligible for retreatment. Data were reported from 24 patients treated to date on the study, including 16 with Hodgkin lymphoma (HL) and eight with systemic anaplastic large cell lymphoma (sALCL). Patients had received a median of four prior systemic therapies, including ADCETRIS. Key findings include:

Details of the poster discussion presentation are as follows:

Brentuximab vedotin for relapsed or refractory non-Hodgkin lymphoma: preliminary results from a phase II study (Abstract #8070)

In a phase II clinical trial, patients with relapsed or refractory CD30-positive non-Hodgkin lymphomas, including diffuse large B-cell lymphoma (DLBCL), peripheral T-cell lymphoma and other less common lymphoma subtypes were enrolled. The trial was designed to assess the antitumor activity, duration of response and safety profile of ADCETRIS in these patients. At the time of data analysis, 28 patients had been enrolled, including 18 with B-cell malignancies and ten with T-cell malignancies. Across all patients, the median number of prior systemic therapies was three. Key findings include:

Details of the poster presentation are as follows:

ADCETRIS is not approved for the treatment of the non-Hodgkin lymphoma subtypes described in this presentation.

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Seattle Genetics Announces ADCETRIS® Clinical Data to be Reported in Multiple Presentations at ASCO Annual Meeting

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