免疫抑制性瘤微环境塑造了胰腺癌,它对当前的免疫疗法没有反应
Zong-Yang Li1, Si-Yu Peng2, Fei-Long Li1
1Department of Hepatobiliary and Pancreatic Surgery, General Surgery Center, The First Hospital of Jilin University, Changchun 130021, Jilin Province, China.
World journal of clinical oncology
|March 11, 2026
概括
胰腺癌免疫疗法由于免疫抑制瘤微环境而失败. 准调节性T细胞,骨髓系衍生抑制细胞和巨细胞可以克服这种抵抗力,使胰腺癌对免疫疗法产生反应.
科学领域:
- 在瘤学瘤学.
- 免疫学 免疫学 免疫学
- 癌症生物学 癌症生物学
背景情况:
- 胰腺管腺癌 (PDAC) 对当前的免疫疗法表现出极大的耐药性.
- 这种耐药性是由富含调节性T细胞 (Tregs),骨髓菌衍生抑制细胞 (MDSCs) 和瘤相关巨细胞 (TAMs) 的免疫抑制性瘤微环境 (TME) 驱动的.
- 这些抑制性免疫细胞形成一个网络,抑制抗瘤细胞毒性T淋巴细胞 (CTLs) 并促进瘤的进展.
研究的目的:
- 阐明Tregs,MDSCs和TAMs在PDAC中产生免疫抑制TME的机制.
- 探索针对这些抑制性免疫细胞种群的新兴治疗策略,以提高免疫疗法的疗效.
- 在PDAC TME中确定新的治疗点.
主要方法:
- 关于PDAC免疫学和免疫治疗的当前文献的综述.
- 对单细胞转录组数据的分析,以确定关键的抑制细胞子集及其功能.
- 检查分子机制,包括细胞因子分泌 (TGF-β,IL-10) 和免疫检查点上调 (CTLA-4,PD-1).
- 研究TAM两极化 (M2表型) 和化学激素信号 (CCL2,CXCL12).
主要成果:
- Tregs通过TGF-β和IL-10等细胞因子抑制CTLs,并提高免疫检查点 (CTLA-4,PD-1) 的调节.
- 通过耗尽氨酸和产生反应性氧物种,MDSCs损害了抗瘤免疫力.
- M2极化TAM通过化基因 (CCL2,CXCL12) 招募额外的抑制细胞.
- 抑制性种群中存在异质性,像高卡斯帕-4Tregs这样的特定子集具有预后相关性.
结论:
- Tregs,MDSCs和TAMs的协调作用在PDAC中创建了一个自我强化的免疫抑制循环.
- 通过Treg耗尽 (例如,抗CD25),MDSC招募抑制 (例如,CCR2抑制剂) 或TAM重编程 (例如,CD40激动剂) 准这些抑制细胞是一个有希望的策略.
- 组合疗法,包括PD-1/PD-L1阻断,有可能将PDAC转化为免疫反应良好的癌症.
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