Merck Receives Priority Review From FDA for New Drug Application for HIF-2α Inhibitor Belzutifan (MK-6482)

Merck known as MSD outside the United States and Canada, announced that the U.S. Food and Drug Administration (FDA) has accepted and granted priority review for a New Drug Application (NDA) for the hypoxia-inducible factor-2 alpha (HIF-2α) inhibitor belzutifan (pronounced bell-ZOO-ti-fan), a novel investigational candidate in Merck’s oncology pipeline, for the potential treatment of patients with von Hippel-Lindau (VHL) disease-associated renal cell carcinoma (RCC), not requiring immediate surgery. This NDA is based on data from the Phase 2 Study-004 trial, in which belzutifan showed a confirmed overall response rate of 36.1% (n=22/61) (95% CI: 24.2-49.4) in patients with VHL disease-associated RCC. The FDA has set a Prescription Drug User Fee Act (PDUFA), or target action, date of September 15, 2021.

“Von Hippel-Lindau disease is a rare genetic condition for which there is no systemic treatment option available and is associated with a high risk of cancer development in multiple organs. In fact, up to 70% of patients with VHL develop renal cell carcinoma during their lifetime,” said Dr. Scot Ebbinghaus, vice president, clinical research, Merck Research Laboratories. “This priority review validates the important progress we have made to expand and diversify Merck’s oncology pipeline with innovative, new therapeutic approaches. We look forward to working closely with the FDA to bring belzutifan to patients in need.”

Merck is also studying belzutifan in advanced RCC and other tumor types through a broad clinical program. In addition to the ongoing Phase 2 Study-004 trial, belzutifan is being evaluated in Phase 3 trials as monotherapy and as part of a combination regimen in previously treated patients and as part of a combination regimen as a first-line treatment for advanced clear cell RCC.