Abstract
In recent years, chimeric antigen receptor T-cell (CAR-T) therapy has made breakthroughs in the treatment of hematological tumors. However, due to the different characteristics of solid tumors from hematological tumors, CAR-T has not achieved good efficacy in the treatment of solid tumors. The key factors limiting the efficacy of CAR-T mainly include the solid tumor cells themselves and their special tumor microenvironment (TME), which damage CAR-T function in multiple processes such as CAR-T infiltration to tumor tissue sites, CAR-T maintaining anti-tumor activity in TME, and target recognition and killing of tumor cells by CAR-T. To solve these problems, more and more preclinical studies have proposed potentially effective solutions, and corresponding clinical studies have been carried out one after another. In this article, the existing challenges and corresponding optimization strategies of CAR-T cell therapy for solid tumors will be reviewed, to provide a reference for the future exploration of CAR-T therapy.
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