PharmAbcine Inc. announced that the Company has entered into a clinical collaboration agreement with MSD (Merck & Co. Inc., Rahway, NJ., USA), to initiate a Phase I combination trial of PMC-309, a novel anti-VISTA (V-domain Ig suppressor of T cell activation) antibody, in combination with KEYTRUDA(R) (pembrolizumab), MSD's anti-PD-1 therapy. Under the terms of the agreement, PharmAbcine will sponsor a Phase I study in Australia to evaluate the safety and clinical efficacy of the combination therapy for the treatment of multiple advanced solid tumors, and MSD will supply KEYTRUDA.