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通过调节STING表达,SIX4控制了抗PD-1的有效性

Beiyuan Liang¹, Evan H Zhang¹, Zhen Ye¹

¹Department of Cancer Biology and Genetics, The Ohio State University, Columbus, Ohio.

Cancer research communications

|October 27, 2023

概括

在结肠癌中SIX4调节STING的表达,影响抗瘤免疫力. 这一发现为预测免疫检查点阻塞疗法的反应提供了潜在的生物标志物.

科学领域:

免疫学免疫学免疫学
分子生物学分子生物学
在瘤学瘤学.

背景情况:

循环GMP-AMP合成酶 (cGAS) /干扰素基因刺激器 (STING) 途径对于抗瘤免疫非常重要.
减少或缺陷的STING表达在各种癌症中很常见,会损害免疫反应.

研究的目的:

研究SIX4在调节结肠癌中STING表达中的作用.
为了确定SIX4是否会影响免疫检查点阻塞疗法的疗效.

主要方法:

在结肠癌细胞中SIX4基因淘汰和宫外表达.
对STING表达,激活和下游信号的分析.
在免疫能力较强的小鼠身上使用PD-1抗体进行的体内研究.
癌症基因组图谱 (TCGA) 结肠癌数据集的生物信息分析.

主要成果:

SIX4 淘汰赛降低了 STING mRNA 和蛋白质水平,而 SIX4 过度表达则增加了它们.
SIX4 耗尽减弱了 STING 激活和下游信号.
减少SIX4表达减少了CD8+T细胞透和PD-1抗体在体内疗效.
结肠瘤中高SIX4表达与炎症反应途径和免疫标记物相关.

结论:

SIX4是结肠癌细胞中STING表达的关键调节者.
SIX4 作为一种潜在的生物标志物,用于预测对免疫检查点阻塞疗法的反应.
向SIX4可能会提高结肠癌免疫疗法的疗效.

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