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人参衍生的纳米粒子重编程巨细胞以调节阿基纳酶-1释放,以改善瘤微环境中的T细胞耗尽

Yan Lv¹, Mengyuan Li², Ling Weng¹

¹Jiangsu Provincial Medical Innovation Center, Affiliated Hospital of Integrated Traditional Chinese and Western Medicine, Nanjing University of Chinese Medicine, Nanjing, Jiangsu, China.

Journal of experimental & clinical cancer research : CR

|November 28, 2023

概括

人参衍生纳米颗粒 (GDNPs) 通过减少阿尔金酶-1 (ARG1) 生产来重编程瘤相关的巨细胞 (TAMs). 这使氨酸代谢正常化,改善T细胞疲劳,并通过mTOR-T-bet轴增强抗瘤免疫力.

科学领域:

免疫学免疫学免疫学
癌症生物学癌症生物学
纳米医学是一种纳米医学.

背景情况:

免疫检查点 (ICs) 抑制剂增强T细胞反应,但T细胞耗尽仍然是结肠直肠癌免疫疗法的挑战.
人参衍生纳米粒子 (GDNPs) 之前通过重编程瘤相关巨细胞 (TAMs) 和降低ICs来显示瘤抑制,但机制尚不清楚.

研究的目的:

阐明GDNP改善结直肠癌中T细胞耗尽的潜在机制.
调查阿尔金酶-1 (ARG1) 和mTOR-T-bet轴在GDNP介导的抗瘤作用中的作用.

主要方法:

在结直肠癌患者数据 (TCGA) 中对ARG1和T细胞的相关性分析.
采用WB,PCR,ELISA和流细胞计的体外研究来评估GDNP对TAM和T细胞的影响.
使用MC38瘤载体模型进行体内研究,以评估GDNP抗瘤功效和机制.

主要成果:

通过减少ARG1的产生,GDNP重新编程TAMs,使 arginine代谢正常化.
观察到T细胞耗尽的改善,导致ICs表达的减少和CD8+T细胞扩张的增强.
确定了mTOR-T-bet轴作为GDNP诱导的T细胞恢复的关键调解器.

结论:

GDNP重新编程巨细胞通过mTOR-T-bet轴调节ARG1释放,减轻瘤微环境中的T细胞耗尽.
这些发现为癌症免疫治疗机制和结直肠癌的潜在治疗策略提供了新的见解.

关键词:

阿尔金纳-1 的作用.人参衍生的纳米粒子.T细胞耗尽的情况与瘤相关的巨细胞.在mTOROR中使用mTOR.

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Tumor Immunotherapy

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