Verastem Reports Positive Phase 3 DUO Results

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Verastem is reporting positive top-line results from its Phase 3 DUO study evaluating the efficacy and safety of duvelisib, a first-in-class oral dual inhibitor of phosphoinositide 3-kinase-delta and P13K-gamma in patients with relapsed or refractory chronic lymphatic leukemia/small lymphocytic lymphoma (CLL/SLL). A company announcement says that on the study’s primary endpoint of progression-free survival as determined by an independent review committee, oral duvelisib monotherapy showed superiority over ofatumumab (Novartis’ Arzerra), an approved standard of care treatment for patients with CLL/SLL, achieving a statistically significant improvement in median progression-free survival of 13.3 months, compared to 9.9 months for ofatumumab.

The company says it will share its findings with FDA in hopes of filing an NDA in the first half of 2018. It says the NDA will be supported by favorable results from both the DUO study in CLL/SLL and the DYNAMO study in indolent non-Hodgkin’s lymphoma, which is said to also have achieved its primary endpoint.

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