叉头转录因子DAF-16在C. elegans中转化胰岛素类代谢和寿命信号
1Department of Molecular Biology, Massachusetts General Hospital, Harvard Medical School, Boston 02114, USA.
Nature
|November 14, 1997
概括
在C. elegans中,胰岛素信号通路对抗DAF-16,一种转录因子. daf-16 中的零突变绕过了对该途径的需求,影响了新陈代谢,发育和寿命.
科学领域:
- 遗传学 是一个遗传学.
- 分子生物学分子生物学
- 发育生物学 发展生物学
背景情况:
- 胰岛素信号调节哺乳动物的葡萄糖运输和新陈代谢.
- 在C. elegans中,一个相关的途径控制了新陈代谢,发育和寿命.
- 在DAF-2 (胰岛素受体同源) 和AGE-1 (PI3K同源) 中的突变会导致长期停药和延长寿命.
研究的目的:
- 研究DAF-16在C. elegans.胰岛素信号通路中的作用.
- 为了确定DAF-16如何与DAF-2/AGE-1信号交互.
- 探索DAF-16同类在代谢调节中的保存功能.
主要方法:
- 使用 daf-16. 中的零突变进行基因分析.
- 对劳动停止,脂肪储存和寿命的表型分析.
- 研究与DAF-7 (TGF-β通路) 的相互作用.
主要成果:
- daf-16 中的 null 突变抑制了 daf-2 和 age-1 突变的影响.
- DAF-16 作用于 DAF-2/AGE-1 信号的下游,对抗其影响.
- DAF-16与TGF-β信号元件 (SMADs) 合作,调节基因转录.
结论:
- DAF-2/AGE-1胰岛素信号通路的功能主要是对抗DAF-16.
- DAF-16 是一个关键的转录因子,可以整合胰岛素和TGF-β信号.
- 在代谢调节中,DAF-16同类体 (FKHR,AFX) 的保留作用表明与糖尿病的潜在联系.
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