CHICAGO--(BUSINESS WIRE)--ZIOPHARM Oncology, Inc. (Nasdaq: ZIOP) announced today that Douglas J. Schwartzentruber, MD, FACS, of the Indiana University Health Goshen Center for Cancer Care, presented initial positive clinical results from the first-ever treatment demonstrating control over transgene encoding of a therapeutic anticancer protein in humans using a small molecule activator ligand. These results were presented at the 2011 Annual Meeting of the American Society of Clinical Oncology (ASCO) being held June 3 – 7, in Chicago, IL.