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线性MTH1抑制剂TH1579通过cGAS-STING通路诱导PD-L1表达和炎症反应

Jianyu Shen¹, Emilio Guillén Mancina¹, Shenyu Chen¹

¹Science for Life Laboratory, Department of Oncology-Pathology, Karolinska Institutet, Stockholm, Sweden.

|May 25, 2024

概括

新型MTH1抑制剂TH1579通过调节PD-L1并增强免疫反应来增强癌症免疫疗法. 这种双重作用药物在改善免疫检查点抑制剂疗效方面表现有前途.

科学领域:

在瘤学瘤学.
免疫学免疫学免疫学
药理学药理学是指药理学的学科.

背景情况:

免疫检查点抑制剂 (ICI) 治疗疗效通常是有限的.
破坏DNA的药物可以通过cGAS-STING通路增强ICI反应.
MTH1 抑制剂向氧化 DNA 损伤和线粒分裂.

研究的目的:

调查MTH1抑制剂TH1579是否可以增强ICI疗效.
为了探索TH1579.的免疫调节特性.
评估TH1579对PD-L1表达和免疫细胞透的影响.

主要方法:

用TH1579.9治疗人类和小鼠癌症细胞系.
使用流式细胞计和qPCR分析PD-L1和化学激素表达.
在体内研究中,使用TH1579和抗PD-L1抗体 (atezolizumab) 的同源性老鼠黑色素瘤模型.

主要成果:

TH1579在人类癌细胞系中提高了PD-L1表达的调节.
结合TH1579和阿特佐利祖马布在小鼠模型中显著改善了抗瘤疗效.
TH1579增加了依赖cGAS-STING通路的促炎性细胞因子 (IFN-β) 和化学因子 (CCL5,CXCL10).

结论:

TH1579证明了可以增强ICI治疗的免疫调节作用.
该药物上调PD-L1并激活cGAS-STING通路,这表明它在改善癌症免疫疗法方面发挥了作用.
TH1579具有作为辅助疗法的潜力,可以克服对免疫检查点阻塞的抵抗力.

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