Abstract
CAR-T cell therapy has emerged as a breakthrough therapy for the treatment of relapsed and refractory hematologic malignancies. However, insufficient CAR-T cell expansion and persistence is a leading cause of treatment failure. Exogenous or transgenic cytokines have great potential to enhance CAR-T cell potency but pose the risk of exacerbating toxicities. Here we present a chemical-genetic system for spatiotemporal control of cytokine function gated by the off-patent anti-cancer molecular glue degrader drug lenalidomide and its analogs. When co-delivered with a CAR, a membrane-bound, lenalidomide-degradable IL-7 fusion protein enforced a clinically favorable T cell phenotype, enhanced antigen-dependent proliferative capacity, and enhanced in vivo tumor control. Furthermore, cyclical pharmacologic combined control of CAR and cytokine abundance enabled the deployment of highly active, IL-7-augmented CAR-T cells in a dual model of antitumor potency and T cell hyperproliferation.
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For original data, please contact mvmaus@mgh.harvard.edu.
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Acknowledgements
This work was supported by R01CA238268 to MVM and NIH K08CA255932, Leukemia Research Foundation New Investigator Award, Damon Runyon Cancer Research Foundation Innovator Award, American Cancer Society Discovery Boost Grant, and Edward P. Evans Foundation Discovery Research Grant to MJ. Select figures created with BioRender.com.
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MCK, EMS, AJA, ICL, AAB, VMS, HNT, AT, and MJ performed the experiments; MCK and MJ analyzed the results and created the figures; RCL, MBL, and BLE provided critical expertise in immune-oncology and targeted protein degradation; MCK, MVM, and MJ designed the study; MCK, MVM, and MJ wrote the manuscript; and all other authors read, edited, and approved the final version of this manuscript.
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MCK, MVM, and MJ are listed as inventors on patents related to this work and held by the Massachusetts General Hospital and Partners Health Care. BLE has received research funding from Celgene, Deerfield, Novartis, and Calico and consulting fees from GRAIL. He is a member of the scientific advisory board and shareholder for Neomorph Inc., TenSixteen Bio, Skyhawk Therapeutics, and Exo Therapeutics. MVM is an inventor on patents related to adoptive cell therapies, held by Massachusetts General Hospital (some licensed to Promab) and University of Pennsylvania (some licensed to Novartis). MVM holds equity in 2SeventyBio, Century Therapeutics, Genocea, Neximmune, Oncternal, and TCR2 and has served as a consultant for multiple companies involved in cell therapies. MJ has received consulting income from RA Ventures. MJ is an inventor on patents related to molecular switch control of genetically engineered immune effector cell therapies held by Mass General Brigham and the Broad Institute.
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Kann, M.C., Schneider, E.M., Almazan, A.J. et al. Chemical genetic control of cytokine signaling in CAR-T cells using lenalidomide-controlled membrane-bound degradable IL-7. Leukemia 38, 590–600 (2024). https://doi.org/10.1038/s41375-023-02113-6
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DOI: https://doi.org/10.1038/s41375-023-02113-6