嵌合抗原受体
Jurkat细胞
CD64
单克隆抗体
抗体
拉吉细胞
化学
受体
流式细胞术
双特异性抗体
分子生物学
癌症研究
细胞生物学
T细胞
生物
免疫学
生物化学
免疫系统
作者
Wen Zhu,Yan Wang,Liangyin Lv,Hui Wang,Wenqiang Shi,Zexin Liu,Mingzhe Zhou,Jianwei Zhu,Huili Lu
标识
DOI:10.1016/j.apsb.2023.02.004
摘要
Developing universal CARs with improved flexible targeting and controllable activities is urgently needed. While several studies have suggested the potential of CD16a in tandem with monoclonal antibodies to construct universal CAR-T cells, the weak affinity between them is one of the limiting factors for efficacy. Herein, we systematically investigated the impact of Fcγ receptor (FcγR) affinity on CAR-T cells properties by constructing universal CARs using Fcγ receptors with different affinities for IgG1 antibodies, namely CD16a, CD32a, and CD64. We demonstrated that the activities of these universal CAR-T cells on tumor cells could be redirected and regulated by IgG1 antibodies. In xenografted mice, 64CAR chimeric Jurkat cells with the highest affinity showed significant antitumor effects in combination with herceptin in the HER2 low expression U251 MG model. However, in the CD20 high expression Raji model, 64CAR caused excessive activation of CAR-T cells, which resulted in cytokine release syndrome (CRS) and the decline of antitumor activity, and 32CAR with a moderate affinity brought the best efficacy. Our work extended the knowledge about FcγR-based universal CAR-T cells and suggested that only the FcγRCAR with an appropriate affinity can offer the optimal antitumor advantages of CAR-T cells.
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