Gene-modified T cell therapy for cancer: Current challenges and potential solutions

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Abstract

Immunotherapy has achieved significant breakthroughs in patients with hematological diseases and various cancers. The adoptive transfer of T cells, especially gene-modified T cells such as chimeric antigen receptor T (CAR-T) cells and T cell receptor-engineered T (TCR-T) cells, is developing rapidly. Since 2017, eight CAR-T cell products have been approved for the treatment of hematological diseases, such as refractory or relapsed acute B lymphoblastic leukemia, specific subtypes of B cell lymphoma, and multiple myeloma. The first TCR-T cell product, Kimmtrak, was approved for the treatment of unresectable or metastatic uveal melanoma in March 2022. However, there are still many problems, including side effects, relapse, high demand for individualization, and expensive cost in hematological diseases, tumor heterogeneity, antigen escape, poor immune cell infiltration ability, immunosuppressive microenvironment, and low response in solid tumors. With the in-depth exploration of tumor immunology and the development of genetic engineering technology, many novel strategies for improving the anti-tumor effect and safety of gene-modified T cell immunotherapy have been attempted. This paper presents a systematic review of the literature on CAR-T cell and TCR-T cell therapy, focusing on applications, clinical trials, problems, and potential solutions.

Keywords

Immunotherapy

Chimeric antigen receptor T cell

T cell receptor-engineered T cell

Tumor microenvironment

Solid tumor

Funding

Healthy Talents Project of Henan Province

National Natural Science Foundation of China

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The authors declare that they have no competing interests.

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