On September 5, 2024 Poseida Therapeutics, Inc. (Nasdaq: PSTX), a clinical-stage allogeneic cell therapy and genetic medicines company advancing differentiated non-viral treatments for patients with cancer and rare diseases, reported that new clinical data from an ongoing Phase 1 study of P-BCMA-ALLO1 in patients with relapsed/refractory multiple myeloma will be presented in an oral session at the 21st International Myeloma Society (IMS) Annual Meeting, which is being held in Rio de Janeiro from September 25-28, 2024 (Press release, Poseida Therapeutics, SEP 5, 2024, View Source [SID1234646381]). The Company is developing P-BCMA-ALLO1, an investigational off-the-shelf allogeneic CAR-T cell therapy enriched for stem cell memory T cells (TSCM), in partnership with Roche for the treatment of relapsed/refractory multiple myeloma.

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"Despite therapeutic advances, multiple myeloma remains an incurable hematologic cancer and relapses are common with BCMA-targeting immunotherapies, such as bispecific T-cell engagers and autologous CAR-T therapies. As a result, patient-focused, off-the-shelf therapies are needed that can provide clinical benefit to patients with relapsed or refractory disease," said Syed Rizvi, M.D., Chief Medical Officer of Poseida Therapeutics. "We look forward to presenting the latest data from our ongoing Phase 1 study of P-BCMA-ALLO1 and its potential as an ‘off-the-shelf’ therapy for patients at IMS. We are also pleased to announce the initiation of the Phase 1b portion of the study, which will allow us to further explore the promise of this program."

IMS Oral Presentation

Talk Title: OA – 04: A Phase 1 Study of P-BCMA-ALLO1, a Non-viral, Allogeneic BCMA Directed CAR-T in Relapsed/Refractory Multiple Myeloma (RRMM)
Presenting Author: Bhagirathbhai R. Dholaria, MBBS, Assistant Professor of Medicine, Department of Medicine, Division of Hematology and Oncology, Vanderbilt University Medical Center
Session: Abstract Session 7
Presentation Date/Time: Friday, September 27, 2024, at 5:42 PM-5:54 PM local time (4:42 PM ET / 1:42 PM PT)
Room: 101 A1-A2
Company-Hosted IMS Webcast and Conference Call Information:
Poseida will host a webcast and conference call on Saturday, September 28, 2024, at 1 PM ET / 10 AM PT. The conference call can be accessed by dialing 800-225-9448 or 203-518-9708 (International) with the conference ID PSTX0928. A live webcast may be accessed using the link here, or by visiting the Events and Presentations section of the Poseida website at investors.poseida.com. After the live webcast, the event will remain archived on the Poseida site for approximately 90 days.

P-BCMA-ALLO1 Phase 1b Clinical Trial
The Company also announced the initiation of a Phase 1b portion of the ongoing Phase 1 clinical trial of P-BCMA-ALLO1 in patients with multiple myeloma. As a result of achieving this milestone, Poseida will receive a $20 million payment from Roche. Poseida and Roche partnered together on the P-BCMA-ALLO1 Phase 1b trial design, which incorporates process improvements and feedback from recently completed advisory board meetings with leading clinicians. Poseida will continue to have responsibility for the expanded Phase 1/1b trial, which will be funded by Roche.

About P-BCMA-ALLO1
P-BCMA-ALLO1 is an allogeneic CAR-T product candidate licensed to Roche targeting B-cell maturation antigen (BCMA) for the treatment of relapsed/refractory multiple myeloma. This allogeneic program includes a VH-based binder that targets BCMA and clinical data presented at ASH (Free ASH Whitepaper) in December 2023 support the Company’s belief that T stem cell (TSCM)-rich allogeneic CAR-Ts have the potential to offer effective, safe, and reliable treatment addressing unmet needs in multiple myeloma. Additional information about the Phase 1 study is available at www.clinicaltrials.gov using identifier: NCT04960579.