PDS Biotechnology Corporation announced the submission to the U.S. Food and Drug Administration (FDA) of an updated Chemistry, Manufacturing and Controls (CMC) package and a Phase 3 multicenter registrational protocol to the company?s Investigational New Drug (IND) submission to evaluate the combination of PDS0101 and KEYTRUDA® (pembrolizumab), Merck?s anti-PD-1 therapy, for the treatment of recurrent or metastatic human papillomavirus (HPV) 16-positive head and neck squamous cell carcinoma (HNSCC). The protocol was developed in accordance with guidance from the FDA on key elements of the Phase 3 program to support the eventual submission of a Biologics License Application (BLA). The Phase 3 trial, named VERSATILE-003, is a randomized, active comparator-controlled study designed to investigate the safety and efficacy of PDS0101 combined with KEYTRUDA® compared to KEYTRUDA® monotherapy in immune checkpoint inhibitor (ICI)-naïve patients with recurrent or metastatic HPV16-positive HNSCC.

The primary efficacy endpoint for VERSATILE-003, per the protocol, is overall survival (OS). The Phase 3 study is expected to involve approximately 90-100 clinical sites globally. PDS Biotech anticipates initiating the VERSATILE-003 Phase 3 trial in the fourth quarter of 2023.