核受体Rev-erbalpha是生物钟的关键敏感元件
Lei Yin1, Jing Wang, Peter S Klein
1Division of Endocrinology, Diabetes, and Metabolism, and University of Pennsylvania School of Medicine, 415 Curie Boulevard, Philadelphia, PA 19104, USA.
Science (New York, N.Y.)
|February 18, 2006
概括
治疗降解了昼夜钟蛋白Rev-erbalpha,激活了Bmal1基因. 这一发现揭示了的关键机制.
科学领域:
- 时间生物学 时间生物学
- 分子药理学分子药理学
- 神经精神病学是一种神经精神病学.
背景情况:
- 双极性障碍与中断的昼夜节律有关.
- 是一种常见的双相情感障碍治疗方法,它抑制了糖原合成酶激酶3 (GSK3).
- 在各种生物体中,GSK3调节昼夜节律.
研究的目的:
- 为了研究将,GSK3和昼夜节律调节联系在一起的分子机制.
- 为了确定GSK3beta在稳定昼夜时钟组件Rev-erbalpha中的作用.
- 探索如何影响Rev-erbalpha稳定性及其对时钟基因表达的影响.
主要方法:
- 利用培养细胞来研究蛋白质-蛋白质相互作用和降解途径.
- 研究了GSK3beta对Rev-erbalpha的酸化和稳定作用.
- 评估了治疗对Rev-erbalpha水平和Bmal1基因表达的影响.
- 用不敏感的Rev-erbalpha突变体进行了实验,以了解其功能.
主要成果:
- 发现GSK3beta可以酸化和稳定昼夜时钟蛋白Rev-erbalpha.
- 在培养细胞中,治疗诱导了Rev-erbalpha的快速蛋白质体降解.
- Rev-erbalpha的降解导致生物钟基因Bmal1.1的激活.
- 一种对不敏感的Rev-erbalpha变体破坏了昼夜基因表达,证实了其调节作用.
结论:
- Rev-erbalpha蛋白的稳定性是周围生理时钟的关键调节者.
- 疗法的机制涉及到Rev-erbalpha.的有针对性的降解.
- 这项研究确定Rev-erbalpha是在昼夜节律调节中的治疗作用的关键生物标.
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