NEEDHAM, Mass.--(BUSINESS WIRE)--Celldex Therapeutics, Inc. (Nasdaq: CLDX) today announced initiation of a Phase 1 study of its therapeutic human antibody candidate, CDX-1127, in patients with selected malignant solid tumors or hematologic cancers. CDX-1127 is a fully human monoclonal antibody that binds CD27, an important co-stimulatory molecule on T cells. CDX-1127, an agonist antibody designed to activate patients’ immune cells against their cancer, has shown potent efficacy in several preclinical models. In addition, CD27 is over-expressed in certain lymphomas and leukemias and can be directly targeted by CDX-1127.