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针对MiR-155的ICOSL可以控制瘤排斥

Esmerina Tili^1,2, Hajime Otsu², Teresa L Commisso²

¹Department of Anesthesiology, Wexner Medical Center, College of Medicine, The Ohio State University, Columbus, OH 43210.

Proceedings of the National Academy of Sciences of the United States of America

|July 9, 2024

概括

微RNA-155 (miR-155) 通过降低诱导性T细胞辅激素配体 (IcosL) 表达来促进癌症,阻碍T细胞抗瘤免疫力. 恢复ICOSL对新型癌症疗法有希望.

科学领域:

在瘤学瘤学.
免疫学免疫学免疫学
分子生物学分子生物学

背景情况:

微RNA-155 (miR-155) 水平升高与各种癌症的攻击性增加有关.
miR-155在瘤微环境中的免疫逃避中的作用需要进一步阐明.

研究的目的:

研究miR-155影响抗瘤免疫力的机制.
探索在癌症治疗中针对miR-155/IcosL轴的治疗潜力.

主要方法:

利用基因工程小鼠模型 (Eμ-miR-155和Cre-Tet-OFF系统) 来研究miR-155在B细胞恶性瘤中的功能.
评估了miR-155对瘤细胞和免疫透物中的IcosL表达的影响.
设计了MC38结肠癌细胞以过度表达ICOSL,并评估了体内抗瘤效应.

主要成果:

在B细胞淋巴瘤中,miR-155的过度表达导致IcosL表达的丧失.
在瘤中诱导miR-155导致恶性细胞缺乏IcosL,而其抑制促进了瘤回归和免疫细胞透.
工程癌细胞表达IcosL增强CD8+T细胞透和减少瘤生长.

结论:

miR-155通过向IcosL,损害抗瘤免疫力,从而抑制细胞毒性T细胞透.
在恶性细胞上恢复或增加IcosL表达可以增强抗瘤免疫反应.
准miR-155/IcosL通路为开发新型癌症免疫疗法提供了一个有前途的战略.

关键词:

免疫排斥免疫排斥免疫疗法是一种免疫疗法.淋巴瘤淋巴瘤是什么微型RNA的向定位固体瘤是一个固体瘤.

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