Pfizer’s Tukysa Meets Trial Endpoint
Pfizer says its Tukysa (tucatinib) achieved a statistically significant and clinically meaningful improvement in progression-free survival in the HER2CLIMB-05 trial evaluating Tukysa versus placebo, both in combination with first-line standard of care maintenance therapy (Genentech’s Herceptin (trastuzumab) plus Genentech’s Perjeta (pertuzumab) following chemotherapy-based induction in patients with HER2+ metastatic breast cancer. A Pfizer statement says treatment with Tukysa in combination with Herceptin and Perjeta was tolerable, with a safety profile generally consistent with the established safety profiles of each individual drug.
Tukysa is described as an orally administered tyrosine kinase inhibitor of HER2 that has been approved in combination with Herceptin and Genentech’s Xeloda (capecitabine) to treat adults with HER2+ advanced unresectable or metastatic breast cancer, including patients with brain metastases who have received one or more prior anti-HER2 breast cancer treatments in the metastatic setting.