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Updated: Jan 6, 2026

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作为人类瘤中免疫抑制性TGF-β1来源的GARP表达Tregs

Pierre Van Meerbeeck¹, Douae Maatougui¹, Grégoire de Streel¹

¹de Duve Institute, UCLouvain, Brussels, Belgium.

Cancer immunology, immunotherapy : CII

|September 13, 2025

概括

在人体瘤中,GARP表达调节性T细胞 (Tregs) 产生TGF-β1,抑制抗瘤T细胞. 用抗GARP抗体阻止这种免疫抑制可以治疗高GARP+Treg透率的癌症.

科学领域:

免疫学免疫学免疫学
癌症生物学癌症生物学
细胞信号传递细胞信号传递

背景情况:

转化生长因子β1 (TGF-β1) 通过抑制抗瘤免疫反应,对癌症进展至关重要.
在人类瘤中识别产生免疫抑制TGF-β1的特定细胞对于开发向疗法至关重要.
调节性T细胞 (Tregs) 表达糖蛋白A重复占主导地位 (GARP) 和血液内皮细胞 (BEC) 是瘤相关的TGF-β1.1的潜在来源.

研究的目的:

在各种类型的人类瘤中研究免疫抑制性TGF-β1的细胞来源.
确定TGF-β1信号传递与瘤微环境中的潜在生产细胞 (如GARP+ Tregs和BECs) 之间的空间关系.
评估向GARP表达Tregs用于癌症免疫治疗的潜力.

主要方法:

多复合免疫基光学和计算机图像分析用于五种癌症类型的186种瘤样本.
在瘤和相邻的非癌性组织中量化GARP+ Tregs,血管和TGF-β1信号传递 (pSMAD2).
在pSMAD2+细胞,FOXP3+Tregs和BECs之间进行空间接近性分析,以推断TGF-β1信号来源.

主要成果:

在29-75%的瘤样本中发现了GARP+ Tregs,瘤中的比例高于邻近组织.
与非癌性组织相比,TGF-β1信号传递 (pSMAD2) 在瘤中大约是癌症组织的两倍.
pSMAD2+瘤透T淋巴细胞 (TILs) 位于显著接近FOXP3+Tregs的位置,这表明Tregs向TILs传递TGF-β1信号,但不是到BECs.

结论:

表达GARP的Tregs,而不是BECs,是人类瘤中免疫抑制性TGF-β1的主要来源.
GARP+ Tregs与TILs的接近表明瘤微环境中的局部免疫抑制.
用抗体向GARP表达的Tregs为癌症提供了潜在的治疗策略,特别是那些Treg透率高的癌症.

关键词:

格尔普 (GARP) 的意思是免疫抑制是一种免疫抑制.定量多重复合的免疫基光学.监管T细胞监管T细胞在TGF-β1中.瘤透的淋巴细胞透到瘤中.

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