MabVax Therapeutics Holdings, Inc., a clinical-stage oncology drug development company, announces that it has received notice from the U.S. Food and Drug Administration (FDA) authorizing the initiation a Phase I clinical trial with HuMab-5B1 as a therapeutic treatment for pancreatic cancer. The Company filed an Investigational New Drug (IND) application for its lead fully human antibody product on November 30, 2015. Patient enrollment in the Phase I clinical trial is expected to begin at multiple investigational sites in early 2016.