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Poseida Therapeutics Announces Nomination of New CAR-T Development Candidate Under Collaboration with Roche

Allogeneic, TSCM-rich dual CAR-T for the treatment of hematologic malignancies, including multiple myeloma

Nomination triggers $15 million milestone payment to Poseida, extending cash runway into early 2026

Poseida Cell Therapy R&D Day to take place on Thursday, November 14 at 7 am PT / 10 am ET

SAN DIEGO, Oct. 17, 2024 /PRNewswire/ -- Poseida Therapeutics, Inc. (Nasdaq: PSTX), a clinical-stage allogeneic cell therapy and genetic medicines company advancing differentiated non-viral treatments for patients with cancer, autoimmune, and rare diseases, today announced the nomination of a new development candidate under its collaboration with Roche. The nomination triggered a $15 million milestone payment from Roche to Poseida.

(PRNewsfoto/Poseida Therapeutics, Inc.)
(PRNewsfoto/Poseida Therapeutics, Inc.)

The new candidate is an allogeneic, dual CAR-T therapy targeting known antigens expressed in hematologic malignancies, including multiple myeloma. The large capacity of Poseida's non-viral transposon-based DNA delivery system enables the insertion of genes for two full length chimeric antigen receptors (CARs) into T stem cell memory cells (TSCM).

"The nomination of a new development candidate builds on our collaboration with Roche and highlights the unique potential of our proprietary non-viral genetic engineering toolkit to create differentiated, TSCM-rich allogeneic CAR-T therapies targeting one or more antigens," said Kristin Yarema, Ph.D., president and chief executive officer of Poseida Therapeutics. "Multiple myeloma is a common and incurable blood cancer with significant room for potent, safe and accessible novel agents to expand use across lines of therapy and sites of care. With compelling preclinical data supporting the target combination of this dual CAR-T, we look forward to advancing this program towards the clinic as a part of the collaboration. We also look forward to providing updates on our CAR-T programs and earlier-stage pipeline at Poseida's upcoming Cell Therapy R&D Day."

Poseida and Roche now have three programs under their collaboration, which was established in August 2022 to develop allogeneic CAR-T therapies directed to hematologic malignancies. The lead collaboration program, P-BCMA-ALLO1, is an allogeneic CAR-T therapy targeting BCMA that has received Regenerative Medicine Advanced Therapy (RMAT) designation for adult patients with relapsed/refractory multiple myeloma after three or more prior lines of therapies. Poseida is currently enrolling patients in a Phase 1b portion of the clinical trial. The second program, P-CD19CD20-ALLO1, is an allogeneic dual CAR-T candidate in Phase 1 development for B-cell malignancies.