FDA grants priority review for tucatinib + trastuzumab + capecitabine to treat locally advanced unresectable or metastatic HER2-positive breast cancer, including patients with brain metastases. Seattle Genetics

Seattle Genetics announced that the FDA has accepted for priority review the Company’s New Drug Application (NDA) for the investigational medicine tucatinib. This NDA requests FDA approval of tucatinib in combination with trastuzumab and capecitabine for treatment of patients with locally advanced unresectable or metastatic HER2-positive breast cancer, including patients with brain metastases, who have received at least three prior HER2-directed agents separately or in combination, in the neoadjuvant, adjuvant or metastatic setting. The filing is based on the results of HER2CLIMB, a randomized pivotal trial comparing tucatinib added to trastuzumab and capecitabine versus trastuzumab and capecitabine alone. HER2CLIMB trial results were recently presented at the 2019 San Antonio Breast Cancer Symposium and published in the New England Journal of Medicine(NEJM). Under the Prescription Drug User Fee Act (PDUFA), the FDA has set a target action date of August 20, 2020. Tucatinib is an oral, small molecule tyrosine kinase inhibitor (TKI) that is highly selective for HER2.