Immunosuppressive tumor microenvironment contributes to tumor progression in diffuse large B-cell lymphoma upon anti-CD19 chimeric antigen receptor T therapy
Zixun Yan , Li Li , Di Fu , Wen Wu , Niu Qiao , Yaohui Huang , Lu Jiang , Depei Wu , Yu Hu , Huilai Zhang , Pengpeng Xu , Shu Cheng , Li Wang , Sahin Lacin , Muharrem Muftuoglu , Weili Zhao
Front. Med. ›› 2023, Vol. 17 ›› Issue (4) : 699 -713.
Immunosuppressive tumor microenvironment contributes to tumor progression in diffuse large B-cell lymphoma upon anti-CD19 chimeric antigen receptor T therapy
Anti-CD19 chimeric antigen receptor (CAR)-T cell therapy has achieved 40%–50% long-term complete response in relapsed or refractory diffuse large B-cell lymphoma (DLBCL) patients. However, the underlying mechanism of alterations in the tumor microenvironments resulting in CAR-T cell therapy failure needs further investigation. A multi-center phase I/II trial of anti-CD19 CD28z CAR-T (FKC876, ChiCTR1800019661) was conducted. Among 22 evaluable DLBCL patients, seven achieved complete remission, 10 experienced partial remissions, while four had stable disease by day 29. Single-cell RNA sequencing results were obtained from core needle biopsy tumor samples collected from long-term complete remission and early-progressed patients, and compared at different stages of treatment. M2-subtype macrophages were significantly involved in both in vivo and in vitro anti-tumor functions of CAR-T cells, leading to CAR-T cell therapy failure and disease progression in DLBCL. Immunosuppressive tumor microenvironments persisted before CAR-T cell therapy, during both cell expansion and disease progression, which could not be altered by infiltrating CAR-T cells. Aberrant metabolism profile of M2-subtype macrophages and those of dysfunctional T cells also contributed to the immunosuppressive tumor microenvironments. Thus, our findings provided a clinical rationale for targeting tumor microenvironments and reprogramming immune cell metabolism as effective therapeutic strategies to prevent lymphoma relapse in future designs of CAR-T cell therapy.
anti-CD19 chimeric antigen receptor T / immunotherapy / diffuse large B cell lymphoma / tumor microenvironment / tumor-associated macrophage / metabolism
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Higher Education Press
Supplementary files
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