Merck, known as MSD outside of the United States and Canada, announced the U.S. Food and Drug Administration (FDA) has accepted for priority review a new supplemental Biologics License Application (sBLA) seeking approval for KEYTRUDA, Merck’s anti-PD-1 therapy, in combination with chemotherapy, for the first-line treatment of patients with unresectable advanced or metastatic malignant pleural mesothelioma. The FDA has set a Prescription Drug User Fee Act (PDUFA), or target action, date of September 25, 2024.

The sBLA is based on data from the pivotal Phase 2/3 IND.227/KEYNOTE-483 trial. Results from the final analysis of the study, presented at the 2023 American Society of Clinical Oncology (ASCO) Annual Meeting, showed KEYTRUDA in combination with chemotherapy demonstrated a statistically significant improvement in overall survival (OS), reducing the risk of death by 21%.

“Malignant pleural mesothelioma is typically diagnosed in advanced stages when curative surgery is not an option, and progresses quickly,” said Dr. Gregory Lubiniecki, vice president, oncology clinical research, Merck Research Laboratories. “We continue to evaluate KEYTRUDA in new and difficult-to-treat tumors and look forward to working with the FDA to help bring KEYTRUDA as a potential treatment option to certain patients with advanced malignant pleural mesothelioma.”