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尼克洛萨米德通过调节RNA结合蛋白HuR介导的PD-L1信号传递来改善癌症免疫疗法

Qi Zhang¹, Zhe Yang¹, Xinbao Hao¹

¹Department of Molecular Biosciences, The University of Kansas, 1567 Irving Hill Rd, Lawrence, KS, 66045-7534, USA.

Cell & bioscience

|October 18, 2023

概括

HuR蛋白调节PD-L1,这是免疫逃避的关键因素. 用尼克洛萨米德抑制HuR可能通过促进T细胞对瘤的反应来增强癌症免疫疗法.

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:

免疫检查点阻塞 (ICB) 在癌症治疗中表现有前途,但在三阴性乳腺癌 (TNBC) 中有效性有限.
了解癌症免疫逃避机制对于改善治疗结果至关重要.

研究的目的:

研究RNA结合蛋白 (RBP) HuR在癌症免疫逃避中通过PD-L1.1的转录后调节的作用.
评估HuR抑制作为一种增强抗癌免疫反应的策略.

主要方法:

评估了HuR与PD-L1mRNA的结合,使用核蛋白免疫沉和RNA拉下测试.
通过CRISPR/Cas9技术生成HuR淘汰细胞系.
使用体外T细胞测定和体内瘤模型评估HuR-PD-L1轴功能.

主要成果:

HuR直接结合并稳定PD-L1mRNA,增加其水平.
赫尔淘汰赛减少了PD-L1的表达,增强了T细胞的激活.
尼克洛萨米德抑制了HuR转位,降低了PD-L1水平和糖化,并在体内改善了抗PD-1免疫疗法的疗效.

结论:

HuR是一种PD-L1的新型后转录调节剂,参与瘤免疫逃避.
尼克洛萨米德通过向HuR-PD-L1轴,显示出重新定位以改善免疫治疗反应的潜力.
这项研究提出了针对HuR/PD-L1的新策略,以克服癌症免疫逃避并提高ICB的疗效.

关键词:

这就是 HuRR 的意思.免疫逃逸是一种免疫逃避.免疫治疗是一种免疫疗法.尼克洛萨米德 (Niclosamide) 是一种尼克洛萨米德.在PD-L1中.这是一种RNA结合蛋白质.

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