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塞马6D前向信号损害了T细胞激活和扩散在头癌的头癌

Takashi Hirai^1,2, Yujiro Naito^1,3,4, Shohei Koyama^3,4,5

¹Department of Immunopathology, World Premier International Research Center (WPI), Immunology Frontier Research Center (IFReC).

|February 8, 2024

概括

赛马福林6D (Sema6D) 损害了CD8+T细胞的透和激活,阻碍了癌症免疫疗法. 阻止小鼠Sema6D信号传递改善了对免疫检查点抑制剂的反应,这表明了新的治疗点.

科学领域:

免疫学免疫学免疫学
癌症生物学癌症生物学
分子信号传输的方法

背景情况:

免疫检查点抑制剂 (ICI) 是关键的癌症疗法,但它们的有效性取决于瘤的免疫微环境.
瘤内的T细胞透和激活显著影响ICI治疗结果.

研究的目的:

为了研究半林6D (Sema6D) 前向信号在调节抗瘤T细胞反应中的作用.
为了确定向Sema6D是否可以提高免疫检查点抑制剂的有效性.

主要方法:

利用小鼠口腔瘤模型研究Sema6D对CD8+T细胞透和激活的影响.
检查了Sema6D对野生类型和Sema6d-Knockout (KO) 小鼠PD-1阻断疗法疗效的影响.
分析了人类头部和部状细胞癌和泛癌数据集的SEMA6D表达及其与免疫标记物的相关性.

主要成果:

通过非造血细胞表达的Sema6D抑制了通过其受体Plexin-A4的瘤特异性CD8+T细胞透和激活.
与野生类型小鼠相比,Sema6d-KO小鼠对PD-1阻断疗法的反应得到了改善.
人类癌症数据显示,SEMA6D表达与CD8A,PDCD1,IFNG和GZMB负相关,表明抗瘤免疫力受到抑制.

结论:

塞马6D前向信号作为有效的抗瘤T细胞反应的障碍.
针对Sema6D信号传输是一个有希望的策略,可以提高免疫检查点抑制剂在各种癌症中的有效性.

关键词:

癌症免疫疗法癌症免疫疗法头癌是头部和部的癌症.免疫学免疫学免疫学在瘤学瘤学.在T细胞,T细胞.

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