一种刺痛激素前药物重编程与瘤相关的巨细胞以促进结直肠癌免疫疗法
Aohua Deng1,2,3, Renming Fan1,2, Yongrui Hai1,2
1Institute of Medical Research, Northwestern Polytechnical University, Xi'an, 710072, China.
Theranostics
|January 2, 2025
概括
一种新型的刺痛激动剂前药物GB2针对TREM2的瘤相关巨细胞 (TAMs) 通过重编程瘤微环境和增强抗瘤免疫力来有效治疗结直肠癌 (CRC).
科学领域:
- 免疫学 免疫学 免疫学
- 在瘤学瘤学.
- 药理学 药理学是指药理学的学科.
背景情况:
- 瘤相关巨细胞 (TAMs) 在结直肠癌 (CRC) 中很普遍,有助于免疫抑制和疾病进展.
- 在TAM中激活干扰素基因刺激器 (STING) 途径为CRC提供了治疗策略,但目前的激动剂缺乏瘤特异性和最佳输送.
- 在CRC瘤微环境中的TAMs中,质细胞2 (TREM2) 上表达的触发受体过度表达.
研究的目的:
- 开发和评估一种新型的STING激动剂前药物GB2,旨在向TREM2对TAM进行增强的CRC治疗.
- 在临床前CRC模型中研究GB2的抗瘤疗效,免疫调节效果和底层机制.
主要方法:
- 分析癌症基因组图谱 (TCGA) 数据和多色免疫光,以评估人类CRC样本中的TREM2表达.
- 在小鼠CRC和黑色素瘤模型中设计,合成和体内评估STING激动剂前药物GB2.
- 骨髓衍生的巨细胞 (BMDM) 的RNA测序,以阐明GB2的药理机制.
- 评估TAM表型,细胞化,免疫细胞透,以及与αPD-1的联合治疗.
主要成果:
- 在小鼠CRC和STING-low黑色素瘤模型中,GB2的使用导致显著的瘤回归,没有观察到系统性毒性.
- GB2治疗将TAM重新编程为M1的亲炎性表型,从而提高了它们的细胞能力.
- 从机械上来说,GB2上调了糖解-ROS-HIF-1α轴,并诱导了内分泌网膜-线粒体接触 (MERC),促进了葡萄糖代谢,细胞因子表达和细胞分裂.
- GB2逆转了与瘤相关的免疫抑制,增加了CD8+T细胞透,并与αPD-1疗法协同改善生存率.
结论:
- 针对TREM2的STING激素原药GB2在结直肠癌的临床前模型中显示出强大的抗瘤疗效和免疫激活特性.
- 通过重编程TAM和增强抗瘤免疫反应,GB2为CRC提供了一个有希望的治疗策略.
- GB2通过TREM2准TAM并激活STING信号的能力为克服瘤诱导的免疫抑制提供了一种新的方法.
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