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A DL-4- and TNFα-based culture system to generate high numbers of nonmodified or genetically modified immunotherapeutic human T-lymphoid progenitors

Abstract : Several obstacles to the production, expansion and genetic modification of immunotherapeutic T cells in vitro have restricted the widespread use of T-cell immunotherapy. In the context of HSCT, delayed naïve T-cell recovery contributes to poor outcomes. A novel approach to overcome the major limitations of both T-cell immunotherapy and HSCT would be to transplant human Tlymphoid progenitors (HTLPs), allowing reconstitution of a fully functional naïve T-cell pool in the patient thymus. However, it is challenging to produce HTLPs in the high numbers required to meet clinical needs. Here, we found that adding tumor necrosis factor alpha (TNFα) to a DL-4-based culture system led to the generation of a large number of nonmodified or genetically modified HTLPs possessing highly efficient in vitro and in vivo T-cell potential from either CB HSPCs or mPB HSPCs through accelerated T-cell differentiation and enhanced HTLP cell cycling and survival. This study provides a clinically suitable cell culture platform to generate high numbers of clinically potent nonmodified or genetically modified HTLPs for accelerating immune recovery after HSCT and for T-cell-based immunotherapy (including CAR T-cell therapy).
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https://www.hal.inserm.fr/inserm-03259822
Contributor : Isabelle Andre <>
Submitted on : Monday, June 14, 2021 - 2:49:06 PM
Last modification on : Wednesday, July 21, 2021 - 4:10:02 PM

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Ranjita Moirangthem, Kuiying Ma, Sabrina Lizot, Anne Cordesse, Juliette Olivré, et al.. A DL-4- and TNFα-based culture system to generate high numbers of nonmodified or genetically modified immunotherapeutic human T-lymphoid progenitors. Cellular and molecular immunology, Nature Publishing Group/Chinese Society of Immunology, 2021, Online ahead of print. ⟨10.1038/s41423-021-00706-8⟩. ⟨inserm-03259822⟩

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