Complete Response Letter for Plinabulin
FDA has issued a complete response letter for the BeyondSpring Pharmaceuticals NDA seeking approval of plinabulin in combination with granulocyte colony-stimulating factor to prevent chemotherapy-induced neutropenia (CIN). The company says the agency indicated the NDA cannot be approved at this time because the results of the single registrational Phase 3 trial were not sufficiently robust to demonstrate benefit. FDA said a second well-controlled trial would be required to satisfy the substantial evidence requirement for approval.
Company officials said they plan to seek a meeting with FDA “to consider the possible future clinical pathway for CIN, which may include a second study.”
BeyondSpring says plinabulin, its lead asset, is a selective immunomodulating microtubule-binding agent that is a potent antigen-presenting cell inducer.