在Caenorhabditis elegans中DAF-2/INSR普遍存在的发育和条件调节
Ivan B Falsztyn1, Seth M Taylor1, L Ryan Baugh1
1Department of Biology, Duke University, Durham, NC 27708, USA.
G3 (Bethesda, Md.)
|January 21, 2025
概括
胰岛素/IGF信号传递 (IIS) 调节是复杂的. DAF-2受体的CHIP依赖的无处不在显示出在开发过程中和响应环境线索时的特定情境的IIS控制.
科学领域:
- 发育生物学是发展生物学.
- 分子内分泌学分子内分泌学
- 科伊莱根斯的研究研究.
背景情况:
- 胰岛素/IGF信号传递 (IIS) 控制着关键的发育和代谢过程.
- IIS 调节涉及除表达之外的复杂机制,包括受体稳定性.
- 在Caenorhabditis elegans胰岛素/IGF受体DAF-2/INSR的稳定性是由CHIP依赖的无化调节.
研究的目的:
- 调查CHN-1/CHIP在调节DAF-2/INSR丰度和IIS活动中的作用.
- 确定DAF-2突变和CHN-1/CHIP干扰在不同发展阶段和环境条件下如何影响IIS.
- 通过DAF-2/INSR无处不在化来阐明IIS监管的上下文依赖性.
主要方法:
- 使用了具有chn-1/CHIP和daf-2突变的C. elegans模型.
- 在不同发育阶段 (幼虫,成年人) 和温度下评估DAF-2/INSR蛋白水平和IIS活性.
- 分析了营养可用性 (饥饿) 对L1幼虫IIS活动的影响.
主要成果:
- 破坏chn-1/CHIP会增加成年C. elegans的DAF-2/INSR丰度和IIS活性,从而减少长寿.
- daf-2 ((gk390525) 基因表现出上下文依赖的IIS活动,在幼虫中显示功能丧失,在成年人中显示功能获取.
- 通过DAF-2/INSR无化来调节IIS活动是动态的,根据发育阶段,温度和营养状况而有所不同.
结论:
- 通过CHN-1/CHIP介导的DAF-2/INSR的无处不在提供了IIS监管的关键层.
- DAF-2/INSR无处不在位的功能相关性高度依赖于发育阶段,温度和营养素的可用性.
- 这项研究揭示了对C. elegansIIS复杂,特定于环境的控制的新见解.
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