FDA Denies Keytruda for Triple-negative Breast Cancer

Share

FDA has issued Merck a complete response letter on a supplemental BLA for Keytruda, the company’s anti-PD-1 therapy for treating patients with high-risk early-stage triple-negative breast cancer, in combination with chemotherapy as pre-operative treatment, and then continuing as a single agent as post-operative treatment. The company says it is reviewing the letter and will discuss next steps with the agency.

 

Merck says the submission was based on polymerase chain reaction data and early interim event-free survival (EFS) findings from the Phase 3 KEYNOTE-522 trial, which is continuing to evaluate for EFS. On 2/9, FDA’s Oncologic Drugs Advisory Committee voted 10-0 that a review decision should be deferred until further data are available from KEYNOTE-522 (see earlier story). The next interim analysis is calendar-driven and will occur in the third quarter of 2021, the company says.

 

Merck’s Keytruda is an anti-PD-1 therapy that works by increasing the ability of the body’s immune system to help detect and fight tumor cells. “Keytruda is a humanized monoclonal antibody that blocks the interaction between PD-1 and its ligands, PD-L1 and PD-L2, thereby activating T lymphocytes which may affect both tumor cells and healthy cells,” the company says.

Read more