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Cellectis and Sanofi partner on alemtuzumab for CAR-T therapies

Cellectis and Sanofi have entered into a partnership and supply agreement for alemtuzumab, to be used as a lymphodepleting agent in Cellectis' allogeneic CAR-T cell trials. The drug targets CD52.

12 October 2026
Cellectis and Sanofi partner on alemtuzumab for CAR-T therapies

Biotechnology company Cellectis and pharmaceutical firm Sanofi have agreed to collaborate on the use of alemtuzumab.

The partnership will see alemtuzumab utilized as part of a lymphodepleting regimen in clinical trials sponsored by Cellectis for its allogeneic CAR-T cell therapies, known as UCART. Alemtuzumab is a monoclonal antibody that targets the CD52 molecule.

Cellectis' UCART products are engineered to be resistant to alemtuzumab, a characteristic intended to improve the expansion and persistence of the CAR-T cells within the patient's body by reducing existing host immune cells.

Alemtuzumab is currently incorporated into the lymphodepleting regimen for Cellectis' UCART22 and UCART123 candidates in trials for relapsed/refractory acute lymphoblastic leukemia (ALL) and acute myeloid leukemia (AML), respectively. Sanofi will supply the antibody for these trials, with discussions planned for future commercial supply.

Original source: cellectis.com