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通过双重向的牛奶外体系统重新编程与瘤相关的巨细胞,作为癌症治疗的有效单一疗法
Ying Chen1, Liang Gong2, Yulin Cao1
1Wuxi Cancer Institute, Affiliated Hospital of Jiangnan University, Wuxi, Jiangsu 214062, China.; Laboratory of Cancer Epigenetics, Wuxi School of Medicine, Jiangnan University, Wuxi, Jiangsu 214122, China.
概括
针对瘤相关巨细胞 (TAMs) 中的PDL1的工程乳外体将免疫抑制M2 TAMs重编程为抗瘤的M1巨细胞. 这种新型纳米药物显示出显著的单剂抗瘤疗效,为癌症免疫治疗提供了有前途的方法.
科学领域:
- 免疫学 免疫学 免疫学
- 纳米医学是一种纳米医学.
- 在瘤学瘤学.
背景情况:
- 与瘤相关的巨细胞 (TAMs) 创造了一个免疫抑制的瘤微环境 (TME),促进癌症免疫逃生.
- 在TAM中,编程死亡配体1 (PDL1) 的上调驱动M2极化,将其确定为潜在的治疗标.
研究的目的:
- 开发一种工程乳系外体 (mExo) 系统,以有针对性地将siPDL1输送到M2 TAMs.
- 评估这种纳米药物在M2 TAMs复极化和恢复抗瘤免疫力的有效性.
主要方法:
- 工程设计的mExos装饰着M2pep和抗EGFR纳米体 (7D12),可以创建7D12-mExo-M2pep-siPDL1.1.
- 在体外和体内测试以评估向传递,M2 TAM复极化和免疫恢复.
- 在一个正确的EGFR癌症小鼠模型中评估单剂抗瘤活性.
主要成果:
- 设计的mExos有效地将siPDL1传递到M2 TAM中.
- 成功地将M2 TAMs重分极化到M1巨细胞,恢复CD8+ T细胞活性并重塑TME.
- 作为单一的药物,系统性管理实现了近90%的瘤生长抑制.
结论:
- PDL1是基于TAM的癌症免疫治疗的可行的标.
- 基于mExo的工程纳米医学为针对M2 TAM提供了一种新的策略.
- 这种方法对癌症治疗中的临床转化有显著的前景.
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