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ZIOPHARM Announces Two Oral Presentations at ASGCT 19th Annual Meeting

BOSTON, Apr 18, 2016 (GLOBE NEWSWIRE via COMTEX) --

ZIOPHARM Oncology, Inc. ZIOP, +3.61% a biopharmaceutical company focused on new cancer immunotherapies, today announced results from two programs will be presented in oral sessions at the upcoming 19 [th] Annual American Society of Gene and Cell Therapy (ASGCT) Meeting. The first presentation highlights preclinical data from the Company's novel viral gene therapy candidate for the controlled expression of IL-12 in combination with inhibition of programmed cell death protein 1 (PD-1) in a mouse model of glioma. The second presentation highlights preclinical data from the Company's evolution of the Sleeping Beauty (SB) non-viral transposon-transposase system in a mouse model of leukemia. The ASGCT meeting will take place May 4-7 at the Marriott Wardman Park Hotel in Washington, D.C.

Title: Regulated Expression of IL-12 as Gene Therapy Concomitant with Blockade of PD-1 for Treatment of Glioma Session Title: Cancer-Immunotherapy, Cancer Vaccines II
Date and Time: Friday, May 6, 2016 4:00 PM - 6:00 PM ET
Abstract Number: 509
Room: Washington 1-2
Summary: The utility of clinically-feasible immunotherapy in the investigational treatment of glioma may be improved through combination therapies that enhance cytotoxic immune-activation while concomitantly reducing immunosuppression. ZIOPHARM and Intrexon evaluated the combination of controlled local interleukin 12 (IL-12) administration using a virus (Ad-RTS-IL-12) activated by an oral ligand (veledimex) (Ad +V) and blockade of PD-1 using a checkpoint inhibitor:

  • Results demonstrated that survival of mice treated with Ad +V and anti-PD-1 therapy was superior to either treatment alone;
  • Combination showed 100% survival;
  • Because Ad-RTS-IL-12 and anti-PD-1 are clinically available, these data provide impetus for evaluating this combination immunotherapy in humans;
  • ZIOPHARM plans to initiate a combination study in 2016 and is currently in discussion with partners to provide anti PD-1 therapy.

"The use of PD-1 checkpoint inhibitors in solid tumors has yielded impressive clinical outcomes, yet these results have not yet translated to gliomas, due in part to the immunologic privilege of the central nervous system," said Francois Lebel, M.D., Executive Vice President, Research and Development, Chief Medical Officer at ZIOPHARM. "By combining PD-1 inhibitors, which release a brake on the immune system, with the controlled tumor-directed release of IL-12, which steps on the immune system's...


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