Merck Touts New Keytruda Endometrial Cancer Data
Merck says it will meet with regulatory authorities about an expanded indication after reporting results from the Phase 3 NRG‑GY018 trial of its anti-PD-1 therapy Keytruda being evaluated in combination with standard-of-care chemotherapy (carboplatin and paclitaxel) then continued as a single agent every six weeks for up to 14 cycles for the first-line treatment of patients with Stage 3-4 or recurrent endometrial carcinoma whose cancer was either mismatch repair proficient (pMMR) or mismatch repair deficient (dMMR).
Data from its trial, according to the company, showed that the Keytruda regimen “demonstrated a statistically significant and clinically meaningful improvement in progression-free survival (PFS) for patients, regardless of mismatch repair status.” In the pMMR cohort of 591 evaluable patients, after a median follow-up of 7.9 months, Merck says the Keytruda regimen reduced the risk of disease progression or death by 46% compared to chemotherapy alone. In the dMMR cohort of 225 evaluable patients, the drug regimen reduced the risk of disease progression or death by 70%.
Keytruda is currently approved for use in combination with Eisai’s Lenvima (lenvatinib) for treating patients with advanced endometrial carcinoma that is pMMR, as determined by an FDA-approved test, or not microsatellite instability-high (MSI-H), who have disease progression following prior systemic therapy. It is also approved as a single agent for treating patients with advanced endometrial carcinoma that is microsatellite instable or dMMR, as determined by an FDA-approved test, who have disease progression following prior systemic therapy in any setting.