通过调节Tregs的PD-1驱动乳腺癌中的免疫抑制
Giovanna Talarico1,2, Mara Lecchi3, Anna Zanichelli1
1Molecular Immunology Unit, Experimental Oncology Department, Fondazione IRCCS Istituto Nazionale Dei Tumori di Milano, Milan, Italy.
Journal of experimental & clinical cancer research : CR
|September 2, 2025
概括
高度乳腺癌中的细胞外基质 (ECM) 影响T细胞. 在ECM3阳性瘤中,SPARC蛋白抑制T细胞活性,这表明除了PD-1/ PD- L1阻断之外还有新的治疗点.
科学领域:
- 癌症学
- 免疫学
- 癌症生物学
背景情况:
- 高度乳腺癌 (HGBC) 具有攻击性,需要新的治疗方法.
- 瘤微环境 (TME),特别是细胞外基质 (ECM),影响瘤的进展和治疗耐药性.
- 在HGBC中与ECM相关的基因特征 (ECM3) 与侵袭性疾病,上皮转化为介质细胞转化 (EMT) 和免疫抑制相关.
研究的目的:
- 研究ECM对T细胞调节的影响.
- 探索ECM3阳性瘤和T细胞表型之间的关系.
- 阐明ECM组件,特别是SPARC与T细胞调节的分子机制.
主要方法:
- 在ECM3阳性瘤患者中分析T细胞表型.
- 使用小鼠模型研究ECM介导的T细胞调节.
- 专注于母细胞蛋白SPARC在ECM3签名中的作用.
主要成果:
- 在ECM3阳性瘤和抑制性编程细胞死亡-1 (PD-1) 阴性调节性T细胞 (Tregs) 之间发现了相关性.
- 通过IL-23和SATB1诱导,SPARC通过抑制T效应细胞来降低Tregs上的PD-1.
- 阻断IL-23恢复了Tregs上的PD-1和激活的T效应细胞,显示出一个关键的调节途径.
结论:
- 该ECM调节HGBC中的T细胞,包括调节性T细胞 (Tregs).
- SPARC和IL-23信号是HGBC的潜在治疗点.
- ECM3可以作为PD-1/PD-L1免疫检查点阻塞 (ICB) 的生物标志物,表明替代疗法的潜在益处.
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