甲状腺刺激激素可能通过诱导M1巨细胞极化促进脂肪组织的胰岛素抵抗
Mengfei Fu1, Hanyu Wang1, Yuhan Zhang1
1Department of Endocrinology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, People's Republic of China.
Journal of inflammation research
|June 30, 2025
概括
甲状腺刺激激素 (TSH) 触发巨细胞内质网膜压力,促进M1极化和恶化胰岛素抵抗 (IR). 这表明TSH,免疫力和代谢健康之间存在联系.
科学领域:
- 内分泌学 在内分泌学.
- 免疫学 免疫学 免疫学
- 代谢研究研究 代谢研究
背景情况:
- 新出现的证据将甲状腺刺激激素 (TSH) 与胰岛素抵抗 (IR) 联系起来.
- 脂肪组织是胰岛素的关键点,但TSH的调节作用尚不清楚.
- 了解TSH对脂肪组织的影响对于代谢健康的洞察至关重要.
研究的目的:
- 为了研究提升TSH对脂肪组织胰岛素耐药性的影响.
- 探索TSH对脂肪组织巨细胞 (ATM) 现型的影响.
- 阐明TSH诱导的脂肪组织功能障碍背后的分子机制.
主要方法:
- 建立了一个亚临床甲状腺功能低下症 (SCH) 鼠标模型,具有升高的TSH.
- 在体内分析了新陈代谢概况,脂肪组织IR和ATM表型.
- 在体外研究中,使用RAW264.7细胞和骨髓衍生的巨细胞 (BMDM) 评估了TSH对巨分化的影响.
主要成果:
- SCH小鼠表现出受损的代谢概况和增加的脂肪组织IR.
- 在SCH小鼠的脂肪组织中观察到M1ATM的增加.
- 在巨细胞中,TSH诱导了内细胞网膜应激,激活了GRP78-ATF6-CHOP通路,并促进了M1极化.
结论:
- 由TSH诱导的内质网膜应激驱动M1 ATM极化,加剧脂肪组织的IR.
- 在SCH小鼠中,药理上抑制内质网膜应激改善了ATM功能障碍和改善了IR.
- 这些发现揭示了TSH,巨细胞免疫力和代谢调节之间的新鲜联系.
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