Encorafenib and Binimetinib Combination Treatment Demonstrates 33.6 Month Median Overall Survival (OS) in Patients with BRAF-Mutant Melanoma in Phase 3 COLUMBUS Trial
Array BioPharma Inc. (Nasdaq: ARRY) and Pierre Fabre today announced results of the planned analysis of overall survival (OS) from the pivotal Phase 3 COLUMBUS trial in patients with BRAF -mutant melanoma. Treatment with the combination of encorafenib 450 mg daily and binimetinib 45 mg twice daily (COMBO450) reduced the risk of death compared to treatment with vemurafenib 960 mg twice daily [hazard ratio (HR) of 0.61, [95% CI 0.47, 0.79, p <0.001]. median os was 33.6 months for patients treated with combo450, compared to 16.9 vemurafenib as a monotherapy. p>
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“Many patients with BRAF -mutant melanoma still face significant challenges managing their disease, and there remains a substantial need for well-tolerated treatments that delay disease progression and improve overall survival,” said Keith T. Flaherty, M.D., Director of the Termeer Center for Targeted Therapy, Massachusetts General Hospital Cancer Center and Professor of Medicine, Harvard Medical School. “This data suggests that the combination of encorafenib and binimetinib may have the potential to become a meaningful new therapy for patients with advanced BRAF -mutant melanoma.”
At the time of the planned analysis comparing COMBO450 to vemurafenib monotherapy, a preliminary analysis of OS in patients treated with 300 mg encorafenib alone daily (ENCO 300), demonstrated a median OS of 23.5 months.
"We are excited to report these overall survival results from the COLUMBUS trial,” said Victor Sandor, M.D., Chief Medical Officer, Array BioPharma. “This encouraging overall survival finding further validates previously reported median progression-free survival and overall response rate results, and taken together with the attractive tolerability profile, these data suggest that the combination of encorafenib with binimetinib has the potential to become a promising new treatment option for these patients.”
As previously reported, the combination of encorafenib and binimetinib was generally well-tolerated. Grade 3/4 adverse events (AEs) that occurred in more than 5% of patients receiving the combination were increased gamma-glutamyltransferase (GGT) (9%), increased blood creatine phosphokinase (CK) (7%) and hypertension (6%). The incidence of selected any grade AEs of special interest, defined based on toxicities commonly associated with commercially available BRAF+MEK-inhibitor treatments for patients receiving the combination of encorafenib and binimetinib included: rash (23%), pyrexia (18%), retinal pigment epithelial detachment (13%) and photosensitivity (5%). Full safety results of COLUMBUS Part 1 were presented at the 2016 Society for Melanoma Research Annual Congress .
The U.S. Food and Drug Administration (FDA) is currently reviewing the New Drug Applications to support use of the combination of encorafenib and binimetinib for the treatment of patients with BRAF -mutant advanced, unresectable or metastatic melanoma. The FDA set a target action date under the Prescription Drug User Fee Act (PDUFA) of June 30, 2018 for both applications. In addition, the European Medicines Agency (EMA), as well as the Swiss Medicines Agency (Swissmedic) and the Australian Therapeutic Goods Administration (TGA), is reviewing the Marketing Authorization Applications for encorafenib and binimetinib.
A detailed update from the COLUMBUS trial will be presented at an upcoming medical congress.
For more information on Array, please go to www.arraybiopharma.com .
To find out more about Pierre Fabre, please go to www.pierre-fabre.com .
 Melanoma Skin Cancer. American Cancer Society. Available at: https://www.cancer.org/cancer/melanoma-skin-cancer.html . Accessed January 2018.
 A Snapshot of Melanoma. National Cancer Institute. Available at: https://seer.cancer.gov/statfacts/html/melan.html . Accessed January 2018.
 Globocan 2012: Estimated Cancer Incidence, Mortality and Prevalence Worldwide in 2012. http://globocan.iarc.fr/Pages/fact_sheets_population.aspx . Accessed January 2018.
 Klein O, et al. Eur J Cancer , 2013.
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Array BioPharma Forward-Looking Statement
This press release contains forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995, including statements about the future development plans of encorafenib and binimetinib; expectations regarding approval of encorafenib and binimetinib for BRAF -mutant melanoma and timing of such approvals; expectations that events will occur that will result in greater value for Array; and the potential for the results of current and future clinical trials to support regulatory approval or the marketing success of encorafenib and binimetinib. Specifically, there is no assurance that results from the BEACON CRC and COLUMBUS trials will satisfy the requirements of regulatory authorities necessary for approval. These statements involve significant risks and uncertainties, including those discussed in our most recent annual report filed on Form 10-K, in our quarterly reports filed on Form 10-Q, and in other reports filed by Array with the Securities and Exchange Commission. Because these statements reflect our current expectations concerning future events, our actual results could differ materially from those anticipated in these forward-looking statements as a result of many factors. These factors include, but are not limited to, the determination by the FDA, EMA or other regulatory agencies that results from clinical trials are not sufficient to support registration or marketing approval of encorafenib and binimetinib; our ability to effectively and timely conduct clinical trials in light of increasing costs and difficulties in locating appropriate trial sites and in enrolling patients who meet the criteria for certain clinical trials; risks associated with our dependence on third-party service providers to successfully conduct clinical trials and to manufacture drug substance and product within and outside the U.S.; our ability to grow and successfully develop commercialization capabilities; our ability to achieve and maintain profitability and maintain sufficient cash resources; and our ability to attract and retain experienced scientists and management. We are providing this information as of February 7, 2018. We undertake no duty to update any forward-looking statements to reflect the occurrence of events or circumstances after the date of such statements or of anticipated or unanticipated events that alter any assumptions underlying such statements.
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