Phio Pharmaceuticals Corp. completed enrollment of its second patient cohort in the PH-762 Phase 1b trial, adding a sixth site in San Diego. One patient with cutaneous squamous cell carcinoma achieved a complete response, and another with squamous cell carcinoma achieved a partial response. The trial aims to evaluate the safety and tolerability of PH-762, an INTASYL siRNA compound targeting PD-1, in patients with cutaneous squamous cell carcinoma, melanoma, or Merkel cell carcinoma.