Poseida, Legend/Janssen Look To Snag Celgene/Bluebird's BCMA Crown

Poseida and Legend/Janssen aim to develop CAR-T therapies with improved efficacy and safety, and both programs delivered updates at ASH for BCMA-targeting CAR-T candidates in multiple myeloma that could challenge Celgene/bluebird's lead in this field.

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While Celgene Corp. and bluebird bio Inc. have the most advanced BCMA-targeting chimeric antigen receptor T-cell (CAR-T) therapy in the clinic for the treatment of relapsed or refractory multiple myeloma, data presented at the American Society of Hematology (ASH) meeting on Dec. 3 in San Diego show that CAR-T therapies against the same target from Poseida Therapeutics Inc., partners Legend Biotech Corp. and Janssen Pharmaceutical Cos., and others are quickly gaining ground.

Early Phase I data showing strong responses in the first 12 patients treated with Celgene's and bluebird's bb21217 – the partners' next-generation CAR-T asset targeting B-cell maturation antigen (BCMA) – were presented at ASH on Dec. 2, but not for their pivotal-stage candidate bb2121. However, data for several other autologous BCMA-targeting CAR-T candidates also were presented on Dec 3, including results from 44 patients treated with Celgene's JCARH125, the BCMA-targeting CAR-T program it bought in the $9bn acquisition of Juno Therapeutics Inc. earlier this year

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