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向HSPB1抑制瘤生长,并取消Treg介导的瘤免疫抑制作用
Qi Hu1, Yang Lu2, Xiaolan Zhong1
1Huadu Institute of Medicine, Guangzhou, Huadu District People's Hospital of Guangzhou, 510800, China.
International immunopharmacology
|February 11, 2026
概括
向HSPB1 (热冲击蛋白β1) 可以通过减少免疫抑制调节T细胞 (Tregs) 和增强抗瘤免疫力来克服结直肠癌对免疫治疗的抵抗力.
科学领域:
- 免疫学 免疫学 免疫学
- 在瘤学瘤学.
- 分子生物学分子生物学
背景情况:
- 结肠直肠癌 (CRC) 对免疫检查点阻塞的反应不佳,原因是内调节性T细胞 (Treg) 与CD8+T细胞的比率高,抑制了抗瘤免疫力.
- 在CRC中驱动这种免疫抑制Treg/CD8+T细胞失衡的分子机制在很大程度上是未知的.
研究的目的:
- 在结直肠癌中确定Treg/CD8+T细胞比率的分子调节剂.
- 调查针对已识别的调节器的治疗潜力,以增强CRC中的抗瘤免疫力.
主要方法:
- 对单细胞RNA-seq,TCGA WGCNA和空间转录组学进行综合分析,以提名候选监管者.
- 在CRISPR-Cas9基因编辑中创建HSPB1-淘汰细胞系 (MC38,SW480).
- 在体内皮下瘤模型,多参数流细胞测量,大量RNA-seq,Transwell测定,西斑,以及在体内T细胞极化测定用于机械解剖.
主要成果:
- 确定HSPB1是内Treg/CD8+T细胞比率的关键决定因素,在CRC中具有预后相关性.
- 空间转录学显示HSPB1-表达瘤细胞与Tregs.co.localized一起局部化.
- 删除或抑制HSPB1抑制了瘤生长,降低了Treg支配性,并通过CCL20-CCR6轴选择性抑制了Treg分化,减轻了免疫抑制.
结论:
- 准HSPB1为结直肠癌提供了一种双重的抗瘤策略.
- 它直接抑制癌细胞的增殖,并减少瘤微环境中的Treg介导免疫抑制.
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