在TNF-α和IGF-1-诱导的共刺激效应中混合受体介导的分子划分
Chandra S Boosani1,2,3, Pradeep N Subramanyam1, Gopal P Jadhav4
1Division of Animal Sciences, College of Agriculture, Food and Natural Resources, University of Missouri, Columbia, MO 65202, USA.
International journal of molecular sciences
|October 29, 2025
概括
胰岛素样生长因子1 (IGF-1) 和瘤坏死因子-α (TNF-α) 信号通路具有独特的相互作用. 由它们的受体形成的混合受体可能会抑制SOCS3的表达,揭示了对炎症调节的新见解.
科学领域:
- 分子生物学分子生物学
- 免疫学 免疫学 免疫学
- 细胞信号传递 细胞信号传递
背景情况:
- 胰岛素样生长因子1 (IGF-1) 和瘤坏死因子-α (TNF-α) 已知分别具有促进生长和调节炎症的作用.
- 这两个因素都可以独立地诱导抑制细胞因子信号-3 (SOCS3) 表达,一种瘤抑制蛋白质.
- 它们的综合信号矛盾地抑制了SOCS3的表达,这是一个尚未完全理解的现象.
研究的目的:
- 阐明IGF-1和TNF-α联合信号对SOCS3表达的不同影响背后的分子机制.
- 研究TNF-α和IGF-1受体之间的结构相互作用及其对SOCS3调节的影响.
主要方法:
- 瘤亡因子受体-1 (TNFR1) 和胰岛素样生长因子-1受体 (IGF1R) 之间的相互作用的结构分析.
- 研究影响SOCS3.3的中间蛋白质表达模式.
- 在TNFR1.1.上分析SOCS3结合点的分析.
主要成果:
- 有证据表明TNFR1可以与IGF1R形成混合受体,可能改变下游信号.
- 这些混合受体的形成可能会抑制导致SOCS3诱导的细胞内信号级联.
- 确定了SOCS3的TNFR1新型结合部位,可能调节TNFR1细胞表面输出和炎症信号传递.
结论:
- 在TNFR1和IGF1R之间形成混合受体是解释在联合IGF-1和TNF-α刺激下抑制SOCS3表达的关键机制.
- 与TNFR1结合的SOCS3可能代表一个负反循环来控制炎症信号.
- 这些发现揭示了参与IGF-1和TNF-α信号通路之间的复杂相互作用的新型分子介质.
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