环境温度升高会通过FoxO介导的胰岛素信号通路减少脂肪的储存
Tucker Hopkins1, Cole Ragsdale1, Jin Seo1
1Department of Biology, College of Arts and Sciences, Rogers State University, Claremore, Oklahoma, United States of America.
PloS one
|February 26, 2025
概括
高温通过抑制胰岛素信号通路来减少体脂肪. 这涉及叉头盒O (FoxO) 蛋白质,在热应激期间对脂质平衡至关重要.
科学领域:
- * 分子生物学 * 分子生物学
- * 代谢调节 代谢调节 代谢调节
- *环境生理学 *环境生理学
背景情况:
- *温度显著影响生物体生理学,包括新陈代谢和寿命.
- *胰岛素信号通路是脂质代谢,细胞生长和组织发育的保守调节者.
- *叉头盒O (FoxO) 蛋白质是胰岛素信号的关键下游媒介,影响新陈代谢过程.
研究的目的:
- * 调查胰岛素信号通路在体内脂肪因温度变化的作用.
- *阐明热应激通过胰岛素信号传递影响脂质储存的具体机制.
- * 确定参与这种反应的关键分子参与者,如FoxO.
主要方法:
- * 成年Drosophila melanogaster暴露在高温下.
- *分析胰岛素信号成分 (InR,Thor,FoxO,Ilps) 和细胞和整个生物体中的Akt酸化的基因表达.
- * 基因操纵包括构成性活性胰岛素受体 (InR) 和FoxO敲击.
主要成果:
- * 升高的温度调节了FoxO (InR,Thor,FoxO) 的直接标,这表明胰岛素信号抑制.
- *热诱导的胰岛素信号抑制以细胞自主的方式发生,独立于Drosophila胰岛素类 (Ilp) 水平.
- * 构成性活跃的InR或FoxO敲击防止在高温下减少身体脂肪.
结论:
- * 胰岛素信号通路,特别是FoxO分支,对于在热应激下调节脂质平衡至关重要.
- *高温抑制胰岛素信号独立于ILP刺激,影响脂质代谢.
- * 针对胰岛素信号传递-FoxO轴提供了管理热应激代谢反应的潜在策略.
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