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AVEO And Astellas Report Final Overall Survival Results From TIVO-1

AVEO Oncology (NASDAQ:AVEO) and Astellas Pharma Inc. (TSE:4503) today announced overall survival (OS) for tivozanib, an investigational agent, from the Phase 3 TIVO-1 ( TIvozanib Versus s Orafenib in 1 st line advanced RCC) study in patients with advanced renal cell carcinoma (RCC). The final OS analysis, as specified by the protocol, shows a median OS of 28.8 months (95% confidence interval [CI]: 22.5–NA) for tivozanib versus a median OS of 29.3 months (95% CI: 29.3–NA) for the comparator arm, sorafenib. No statistical difference between the two arms (HR=1.245, p=0.105) was observed. The OS data are included in the tivozanib New Drug Application (NDA) filing and will be presented on February 16 at the 2013 American Society for Clinical Oncology Genitourinary Cancers Symposium (ASCO GU), abstract #350.

Overall survival is a secondary endpoint of the TIVO-1 study. A one-sided crossover for patients randomized to the sorafenib (comparator) arm was offered pursuant to a separate, long-term treatment protocol to allow trial participants to receive tivozanib upon disease progression. This resulted in a substantial difference in the use of subsequent therapies. Of the patients who discontinued their initial therapy, 10% originally on the tivozanib arm received subsequent anti-VEGF therapy (36% received any subsequent therapy) while 70% of patients originally on the comparator arm received subsequent anti-VEGF therapy (74% received any subsequent therapy).

“It's encouraging to see that patients in the study who received tivozanib had a median overall survival of 28.8 months, particularly given that these patients received minimal subsequent therapy,” said principal investigator Robert J. Motzer, M.D., attending physician, genitourinary oncology service, Memorial Sloan-Kettering Cancer Center, and professor of medicine, Weill Medical College, Cornell University, New York. “The safety and efficacy results from TIVO-1 and other clinical trials of tivozanib in advanced RCC suggest it may provide an important new first line treatment option for patients with this aggressive disease.”

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