– Phase 1 clinical trial of CAR-T produced and infused in two days or less from gene transfer using Ziopharm’s Sleeping Beauty platform –  

– Rapid personalized manufacture of CD19-specific CAR-T for investigation in unaddressed patient population with relapsed leukemias and lymphoma after bone marrow transplantation –

BOSTON, MA, USA I October 01, 2019 I Ziopharm Oncology, Inc. (“Ziopharm” or “the Company”) (Nasdaq:ZIOP), today announced that the U.S. Food and Drug Administration (FDA) has cleared an investigational new drug application (IND) for a phase 1 clinical trial to evaluate CD19-specific CAR-T, produced using a process termed rapid personalized manufacture (RPM), as an investigational treatment for patients with relapsed CD19+ leukemias and lymphomas.

The IND clearance builds upon the Company’s experience with two prior generations of immunotherapy trials using the Sleeping Beauty platform, which it believes is the most clinically-advanced non-viral approach to the genetic modification of T cells. With this third-generation trial, DNA from the Sleeping Beauty system is stably inserted into the genome of resting T cells to co-express a chimeric antigen receptor (CAR), membrane-bound IL-15 (mbIL15) and a safety switch, which is designed to reduce cost, simplify production, and preserve the therapeutic potential of the T cells.

“There are currently no effective treatment options for patients who relapse soon after allogeneic bone marrow transplantation (BMT), as evidenced by their low rate of remission and poor long-term survival. This trial expands the range of patients with CD19-expressing malignancies that can be treated using the RPM technology,” said Laurence Cooper, M.D., Ph.D., Chief Executive Officer of Ziopharm. “We believe RPM is the fastest approach to manufacturing and releasing CD19-specific CAR-T, as T cells from the blood stream are genetically reprogramed with the Sleeping Beauty system and then infused within two days of gene transfer. Existing commercial T-cell products using viral-based manufacturing are costly, time consuming to make and complex to deliver. We are now positioned to not only address those issues, but also to treat a patient group that remains underserved by existing therapies.”

Up to 24 patients will be enrolled to evaluate infusion of donor-derived RPM CAR-T in patients with CD19+ leukemias and lymphomas who have relapsed after allogeneic BMT. This study will be conducted at The University of Texas MD Anderson Cancer Center under an investigator-initiated trial expected to begin later this year.

Research reveals three-year survival for adults with CD19+ acute lymphoblastic leukemia after allogeneic BMT ranges from 30% to 65%.1 For patients with other CD19+ cancers, allogeneic BMT can provide a three-year survival rates between 30% to 75%.1 Few patients experience a durable remission who relapse in the months following allogeneic BMT, regardless of the treatment modality, with some having a median survival of only 2 to 3 months.2

About Ziopharm Oncology, Inc.
Ziopharm Oncology is an immuno-oncology company focused on developing end-to-end cost-effective solutions using its non-viral Sleeping Beauty platform for TCR and CAR T-cell therapies and immune-stimulating gene therapy with Controlled interleukin 12 (IL-12). The Sleeping Beauty platform genetically modifies T cells with DNA plasmids to express T-cell receptors to target neoantigens inside and outside hotspots for solid tumors and CAR to target CD19 for blood cancers using the Company’s rapid personalized manufacturing to produce and release CAR-T within two days of gene transfer. The Sleeping Beauty platform is being advanced in collaboration with the National Cancer Institute, The University of Texas MD Anderson Cancer Center and Eden BioCell. The Company also is developing its Controlled IL-12 platform, or Ad-RTS-hIL-12 plus veledimex, as monotherapy and in combination with immune checkpoint inhibitors to treat brain cancer, including in collaboration with Regeneron Pharmaceuticals.

1 D’Souza A, Fretham C. Current Uses and Outcomes of Hematopoietic Cell Transplantation (HCT): CIBMTR Summary Slides, 2018. Available at https://www.cibmtr.org  
2 Keil F, Prinz E, Kalhs P, et al. Treatment of leukemic relapse after allogeneic stem cell transplantation with cytotoreductive chemotherapy and/or immunotherapy or second transplants. Leukemia 2001; 15:355-361.

SOURCE: Ziopharm Oncology