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FDA grants fast track designation to CB-011 for the treatment of RRMM

Apr 28, 2023
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Learning objective: After reading this article, learners will be able to cite a new clinical development in relapsed/refractory MM

On April 2023, the U.S. Food and Drug Administration (FDA) granted fast track designation to CB-‍011, an allogeneic anti-B-cell maturation antigen (BCMA) chimeric antigen receptor (CAR) T-cell therapy, for the treatment of relapsed/refractory multiple myeloma.1

CB-011 is a genetically-engineered CAR T cell edited using CRISPR hybrid RNA-DNA.1 These edits include inserting the anti-BCMA CAR into the T cell, removing the beta-2 microglobulin protein, and inserting a beta-2 microglobulin human leukocyte antigen fusion protein.2 The engineering of this therapy aims to improve CAR T-cell persistence and antitumor response through the inhibition of T- and NK-mediated immune rejection.1

CB-011 is currently being evaluated as part of the CaMMouflage phase I trial (NCT05722418). This trial is recruiting patients in the United States who have received at least three prior treatments (including a proteasome inhibitor, an immunomodulatory drug, and an anti-CD38 antibody) and have not received any previous CAR T-cell therapy. CaMMouflage has two primary outcomes:

  • Part A, dose escalation; aims to establish the optimal therapeutic dosage.
  • Part B, the expansion phase; records overall response rates to indicate efficacy in the treatment of relapsed/refractory multiple myeloma. Part B data will be evaluated using the International Myeloma Working Group (IMWG) response criteria.3

  1. Caribou Biosciences. Caribou Biosciences announces FDA granted fast track designation to CB-011, an allogeneic CAR-T cell therapy for relapsed or refractory multiple myeloma. https://investor.cariboubio.com/news-releases/news-release-details/caribou-biosciences-announces-fda-granted-fast-track-designation. Published Apr 4, 2023. Accessed Apr 24, 2023.
  2. Caribou Biosciences. Next-generation allogeneic cell therapies. https://www.cariboubio.com/pipeline/. Accessed Apr 24, 2023.
  3. Clinicaltrials.gov. CRISPR-edited allogeneic anti-BCMA CAR-T cell therapy in patients with relapsed/refractory multiple myeloma (CaMMouflage). https://clinicaltrials.gov/ct2/show/NCT05722418. Updated Mar 2, 2023. Accessed Apr 24, 2023.

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