State Key Laboratory of Genetic Engineering and Engineering Research Center of Gene Technology, Ministry of Education, Institute of Genetics, School of Life Sciences, Fudan University, Shanghai, China.
Front Immunol. 2021 Mar 11;12:628906. doi: 10.3389/fimmu.2021.628906. eCollection 2021.
Chimeric antigen receptor (CAR) T cell therapy faces a number of challenges for the treatment of non-small-cell lung carcinoma (NSCLC), and efficient migration of circulating CAR T cells plays an important role in anti-tumor activity. In this study, a CAR specific for tumor antigen mesothelin (Msln-CAR) was co-expressed with cell chemokine receptors CCR2b or CCR4. Findings showed that CCR2b and CCR4 enhanced the migration of Msln-CAR T cell by transwell assay. When incubated with mesothelin-positive tumor cells, Msln-CCR2b-CAR and Msln-CCR4-CAR T cell specifically exerted potent cytotoxicity and produced high levels of proinflammatory cytokines, including IL-2, IFN-γ, and TNF-α. Furthermore, NSCLC cell line-derived xenograft (CDX) model was constructed by implanting subcutaneously modified A549 into NSG mice. Compared to conventional Msln-CAR T cells, living imaging indicated that Msln-CCR2b-CAR T cells displayed superior anti-tumor function due to enhanced migration and infiltration into tumor tissue shown by immunohistochemistry (IHC) analysis. In addition, histopathological examinations of mice organs showed that no obvious organic damages were observed. This is the first time that CAR T cell therapy combined with chemokine receptor is applied to NSCLC treatment.
嵌合抗原受体 (CAR) T 细胞疗法在治疗非小细胞肺癌 (NSCLC) 方面面临诸多挑战,而循环 CAR T 细胞的有效迁移在抗肿瘤活性中起着重要作用。在这项研究中,共表达了一种针对肿瘤抗原间皮素 (Msln) 的 CAR(Msln-CAR)和细胞趋化因子受体 CCR2b 或 CCR4。研究结果表明,CCR2b 和 CCR4 通过 Transwell 测定增强了 Msln-CAR T 细胞的迁移。当与间皮素阳性肿瘤细胞孵育时,Msln-CCR2b-CAR 和 Msln-CCR4-CAR T 细胞特异性发挥强大的细胞毒性作用,并产生高水平的促炎细胞因子,包括 IL-2、IFN-γ 和 TNF-α。此外,通过将修饰后的 A549 皮下植入 NSG 小鼠构建了 NSCLC 细胞系衍生的异种移植 (CDX) 模型。与常规 Msln-CAR T 细胞相比,活体成像表明,由于 IHC 分析显示 Msln-CCR2b-CAR T 细胞的迁移和浸润到肿瘤组织中增强,因此其具有更好的抗肿瘤功能。此外,对小鼠器官的组织病理学检查表明,未观察到明显的有机损伤。这是首次将 CAR T 细胞疗法与趋化因子受体联合应用于 NSCLC 的治疗。
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