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ZYBRESTAT Results Suggest Improvement in Overall Survival in Phase 2/3 Study in Anaplastic Thyroid Cancer


OXiGENE (Nasdaq: OXGN) announced today that encouraging final results from a randomized, controlled, Phase 2/3 study of ZYBRESTAT in patients with anaplastic thyroid cancer were presented today at the 2011 Annual Meeting of the American Society of Clinical Oncology meeting in Chicago, Illinois, by Julie Sosa, M.D., Associate Professor of Surgery and of Medicine at Yale University, and primary investigator in the study.

In this 80-patient study, the median overall survival (OS) time was 5.2 months for patients who received ZYBRESTAT and chemotherapy compared with 4.0 months for patients receiving chemotherapy alone (Hazard Ratio (95% CI) of 0.72 (0.43, 1.20)), representing a 28% reduction in the risk of death for patients receiving ZYBRESTAT and chemotherapy. For patients treated with ZYBRESTAT and chemotherapy, the likelihood of being alive at six months was 48% compared with 35% for patients treated with the control arm regimen. At one year, the likelihood of being alive was 26% for patients treated with ZYBRESTAT and chemotherapy compared with 9% for patients treated with chemotherapy alone. As in other studies of ZYBRESTAT, the most clinically relevant side effects reported in the study were neutropenia, transient hypertension, clinically asymptomatic QTc prolongation and tumor pain.

Posted-In: News FDA


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