通过细菌重塑瘤微环境,可以在晚期固体瘤中增加采用T细胞疗法
Chaojie Zhu1,2,3, Chao Liu4, Qing Wu2,3
1Department of Hepatobiliary and Pancreatic Surgery the Second Affiliated Hospital, School of Medicine, Zhejiang University, 310009, Hangzhou, China.
Signal transduction and targeted therapy
|November 21, 2024
概括
这项研究引入了使用大肠杆菌的细菌辅助疗法,以增强固体瘤的采用性T细胞疗法. 这种组合使瘤环境正常化,改善T细胞透和根除晚期癌症.
科学领域:
- 免疫学 免疫学 免疫学
- 在瘤学瘤学.
- 微生物学 微生物学
背景情况:
- 固体瘤创造了一个敌对的微环境,通过限制T细胞透和促进疲劳,阻碍了采用T细胞疗法的疗效.
- 目前采用T细胞疗法在治疗固体瘤方面面临重大挑战,原因是复杂的瘤微环境.
研究的目的:
- 开发一种基于细菌的辅助剂策略,以增强用于固体瘤治疗的采用性T细胞疗法.
- 研究细菌疗法改善T细胞透和抗瘤活性的机制.
主要方法:
- 在内注射大肠杆菌MG1655作为细菌辅助剂.
- 评估瘤血管正常化和巨细胞重编程 (M1表型,CCL5产生).
- 在治疗大肠杆菌后对T细胞透的评估,有或没有巨细胞枯竭或CCL5中和.
- 在黑色素瘤和胰腺瘤模型中进行大肠杆菌辅助和采用T细胞治疗的联合治疗.
- 分析远端瘤控制和瘤疫苗接种 in situ 的效果.
主要成果:
- 内瘤大肠杆菌注射使瘤血管正常化,并将与瘤相关的巨细胞重新编程为M1表型,从而增加CCL5的产生.
- 巨细胞枯竭或CCL5中和显著降低了细菌疗法治疗瘤中的T细胞透.
- 大肠杆菌辅助和采用T细胞治疗的组合有效地根除了早期黑色素瘤,并抑制了胰腺瘤的进展.
- 这种双重策略诱导了in situ瘤疫苗接种,增强了远端瘤控制.
- 综合方法通过从内部和外围攻击瘤,证明了对晚期黑色素瘤和肝细胞癌的强大疗效.
结论:
- 使用大肠杆菌的细菌辅助疗法可以克服免疫抑制瘤微环境,增强固体瘤的采用性T细胞疗法.
- 该机制涉及将瘤血管正常化,重编程巨细胞,并通过CCL5.5促进T细胞透.
- 这种组合方法为治疗各种晚期固体瘤提供了有希望的策略,包括黑色素瘤和肝细胞癌.
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