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Array gets positive top-line results in Phase 3 melanoma trial

May 9, 2017

Array BioPharma (Nasdaq: ARRY) today announced top-line results from Part 2 of the Phase 3 COLUMBUS study evaluating binimetinib, a MEK inhibitor, and encorafenib, a BRAF inhibitor, in patients with BRAF-mutant advanced, unresectable or metastatic melanoma. The primary analysis of Part 2 compared progression free survival (PFS) in patients treated with binimetinib 45mg twice daily plus encorafenib 300mg daily (COMBO300) to patients treated with encorafenib 300mg daily as a single agent. The median PFS for patients treated with COMBO300 was 12.9 months compared to 9.2 months for patients treated with single agent encorafenib, with HR of 0.77 [95% CI 0.61-0.97, p=0.029]. COMBO300 was generally well-tolerated and reported dose intensity and adverse events were consistent with COMBO450 results in COLUMBUS Part 1. Part 2 was designed specifically to assess the contribution of binimetinib to the combination of binimetinib and encorafenib by reducing the dose of encorafenib to 300mg in the combination arm to allow for a comparison of equal doses across arms. Further results from Part 2 will be presented at a medical meeting during the second half of 2017.

“The totality of the COLUMBUS results, including estimated progression free survival, objective response rate, dose intensity and tolerability of the combination, provide a strong and consistent theme across multiple endpoints, underscoring the promise of binimetinib plus encorafenib as an attractive treatment option for patients diagnosed with BRAF-mutant melanoma,” said Keith T. Flaherty, M.D., Director of the Termeer Center for Targeted Therapy, Massachusetts General Hospital and Professor of Medicine, Harvard Medical School.

Ron Squarer, Chief Executive Officer at Array BioPharma noted: “The robust PFS benefit and tolerability observed with binimetinib plus encorafenib in COLUMBUS Part 2 once again demonstrates the combination represents a potentially important addition to the MEK/BRAF treatment landscape for patients with BRAF-mutant melanoma. The results of Part 2 confirm the contribution of binimetinib to the combination.”

Based on the strength of data from Part 1 and Part 2, Array is on track to file an NDA for COLUMBUS in June or July 2017.

http://bit.ly/2qZBtxJ

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