与GDP相关的Rab37通过减弱STAT1转位来调节M2类瘤相关的巨细胞极化,从而降低了I型IFN通路的下调
Chen-Tai Hong1, You-En Yang2, Hsueh-Fen Juan3
1Department of Pharmacology, College of Medicine, National Cheng Kung University, No.1, University Road, Tainan, 701, Taiwan.
British journal of cancer
|February 21, 2025
概括
独立于囊泡运输的Rab37蛋白质通过隔离STAT1.1促进瘤相关巨细胞 (TAMs) 中的M2极化. 这种相互作用与晚期肺癌和患者生存率低下有关.
科学领域:
- 免疫学 免疫学 免疫学
- 癌症生物学 癌症生物学
- 分子细胞生物学 分子细胞生物学
背景情况:
- 与瘤相关的巨细胞 (TAMs) 主要在瘤微环境 (TME) 中表现出M2极化.
- 之前的研究确定了Rab37在M2极化IL-6贩运中的作用.
- 这项研究揭示了Rab37在促进M2 TAM两极分化方面具有一种新的非贩运功能.
研究的目的:
- 调查Rab37在M2 TAM极化中的非传统作用.
- 阐明Rab37影响干扰素 (IFN) 途径的分子机制.
- 评估Rab37和STAT1定位在肺癌中的临床相关性.
主要方法:
- 使用cDNA微阵列对野生类型和Rab37淘汰赛骨髓衍生的巨细胞 (BMDMs) 的基因表达概况.
- 在体外/体外测定和临床研究以确认Rab37在IFN通路中的机制.
- 分析STAT1-Rab37相互作用及其对STAT1核转位的影响.
主要成果:
- 在Rab37淘汰赛BMDM中,I型IFN信号显著增强.
- 拉布37的表达增加,而I型IFN基因在暴露于肺癌条件下的介质和表观遗传药物的巨细胞中减少.
- GDP-bound Rab37将STAT1封存到细胞质中,抑制其转录活性并降低IFN基因的调节.
- 一个CD163+/Rab37+/STAT1 (细胞质) TAM特征与晚期肺癌阶段和患者生存率降低相关.
结论:
- Rab37与STAT1的细胞质相互作用对于M2 TAM两极分化至关重要.
- CD163+/Rab37+/STAT1 (细胞质) TAMs 代表了肺癌的潜在预后生物标志物.
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