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Seattle Genetics Announces Positive Topline Results from Pivotal Trial of Tucatinib in Locally Advanced or Metastatic HER2-Positive Breast Cancer

Published: 2019-10-21 10:45:00 ET
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-HER2CLIMB Trial Met Primary Endpoint and Both Key Secondary Endpoints-

-Global Regulatory Strategy Includes NDA Submission to U.S. FDA Planned for First Quarter of 2020-

-Data to be Presented at the 2019 San Antonio Breast Cancer Symposium-

-Company to Host Conference Call Today at 9:00 a.m. EST-

BOTHELL, Wash.--(BUSINESS WIRE)-- Seattle Genetics, Inc. (Nasdaq:SGEN) today announced positive topline results from the HER2CLIMB trial, a randomized, double-blind, placebo-controlled, active comparator pivotal trial evaluating tucatinib. The trial compared tucatinib in combination with trastuzumab and capecitabine to trastuzumab and capecitabine alone in patients with locally advanced unresectable or metastatic HER2-positive breast cancer. Patients had previously received trastuzumab, pertuzumab and ado-trastuzumab emtansine (T-DM1), and 47 percent of the patients enrolled in the trial had brain metastases at the time of enrollment. Tucatinib is an oral, small molecule tyrosine kinase inhibitor (TKI) that is highly selective for HER2.

The trial met the primary endpoint of progression-free survival (PFS), showing that the addition of tucatinib was superior to trastuzumab and capecitabine alone, with a 46 percent reduction in the risk of disease progression or death (hazard ratio (HR)=0.54 (95% Confidence Interval (CI): 0.42, 0.71); p