高胰岛素血症引起的脂肪细胞TPH2的上调有助于外周血清的产生,代谢功能障碍和肥胖
Brian I Park1,2, Andrew R Reeves1, Ying Zhu1,2
1Jean Mayer USDA Human Nutrition Research Center on Aging and.
The Journal of clinical investigation
|June 2, 2025
概括
脂肪组织中的基酶2 (TPH2) 在肥胖中升高. 降低TPH2可以改善新陈代谢和棕色脂肪功能,这表明TPH2是肥胖和相关疾病的治疗点.
科学领域:
- 生物化学 生物化学
- 代谢研究的研究.
- 内分泌学 在内分泌学.
背景情况:
- 氨酸氧化酶 (TPH) 酶调节了血清的合成.
- 虽然TPH1与肥胖有关,但TPH2在脂肪组织中的作用尚不清楚.
- TPH2是一种神经异型,在肥胖脂肪组织中高度表达.
研究的目的:
- 调查TPH2在肥胖期间脂肪组织中的作用.
- 确定TPH2是否是肥胖和代谢并发症的潜在治疗标.
主要方法:
- 研究了饮食诱导肥胖 (DIO) 和肥胖/肥胖小鼠以及肥胖人类的TPH2表达.
- 在小鼠中利用脂肪细胞TPH2缺乏和过度表达模型.
- 研究了TPH2表达的调节途径,包括高胰岛素血症,mTORC1和SREBP1.
- 在人体皮下脂肪组织中与空腹胰岛素相关的TPH2mRNA水平.
主要成果:
- 在肥胖小鼠和人类中,脂肪TPH2的表达显著升高.
- 脂肪细胞中的TPH2缺乏改善了DIO代谢并发症,并增强了棕色脂肪组织 (BAT) 热生成.
- TPH2过度表达抑制了BAT热生成,并加剧了肥胖和代谢功能障碍.
- 肥胖引起的高胰岛素血症通过mTORC1和SREBP1.1通过脂肪细胞TPH2进行上调.
- 人类TPH2mRNA水平与禁食胰岛素正相关.
结论:
- 与肥胖相关的脂肪细胞TPH2的增加在调节能量代谢和远端组织生理学方面发挥着至关重要的作用.
- TPH2成为治疗肥胖和相关代谢障碍的潜在治疗标.
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