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FDA Accepts Application for Merck’s KEYTRUDA® (pembrolizumab) Plus Chemotherapy as First-Line Treatment for Locally Advanced Unresectable or Metastatic Gastric or Gastroesophageal Junction Adenocarcinoma

By AP News - Apr 13, 2023, 06:48 AM ET
Last Updated - Jun 22, 2023, 08:11 AM EDT
FDA Accepts Application for Merck’s KEYTRUDA® (pembrolizumab) Plus Chemotherapy as First-Line Treatment for Locally Advanced Unresectable or Metastatic Gastric or Gastroesophageal Junction Adenocarcinoma

Merck has an extensive clinical development program evaluating KEYTRUDA in gastrointestinal cancers

RAHWAY, N.J.--(BUSINESS WIRE)--Apr 13, 2023--

Merck (NYSE: MRK), known as MSD outside of the United States and Canada, today announced the U.S. Food and Drug Administration (FDA) has accepted for review a new supplemental Biologics License Application (sBLA) seeking approval for KEYTRUDA, Merck’s anti-PD-1 therapy, in combination with fluoropyrimidine- and platinum-containing chemotherapy, for the first-line treatment of patients with locally advanced unresectable or metastatic gastric or gastroesophageal junction (GEJ) adenocarcinoma. The sBLA is based on data from the KEYNOTE-859 trial, in which KEYTRUDA plus chemotherapy demonstrated a statistically significant improvement in overall survival (OS) versus chemotherapy alone, regardless of PD-L1 expression, in patients who were human epidermal growth factor receptor 2 (HER2) negative. The FDA has set a Prescription Drug User Fee Act (PDUFA), or target action, date of December 16, 2023.

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“The five-year survival rate for patients diagnosed with metastatic gastric cancer is estimated to be only six percent, and eighty percent of patients with locally advanced unresectable or metastatic gastric or gastroesophageal junction adenocarcinoma have HER2-negative disease,” said Dr. Scot Ebbinghaus, vice president, global clinical development, Merck Research Laboratories. “We are committed to working closely with the FDA to bring KEYTRUDA to more patients with gastric and gastroesophageal junction cancer who are in need of additional treatment options that may help them live longer.”

KEYTRUDA is currently approved in combination with trastuzumab, fluoropyrimidine- and platinum-containing chemotherapy, for the first-line treatment of patients with locally advanced unresectable or metastatic HER2-positive gastric or GEJ adenocarcinoma in the U.S. This indication was approved by the FDA under accelerated approval based on tumor response rate and durability of response data from the Phase 3 KEYNOTE-811 study. Continued approval for this indication may be contingent upon verification and description of clinical benefit in the confirmatory trials.

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