线性细胞通过在模拟的微重力和隔离环境中降解NR1D1来调节昼夜节律
Sihai Zhou1,2, Xiaopeng Li2, Fengji Liang2
1Department of Pathology and Forensics, Dalian Medical University, Dalian 116044, China.
International journal of molecular sciences
|May 11, 2024
概括
长期的太空飞行会破坏昼夜节律,因为它会损害大脑中线粒的功能.
科学领域:
- 神经科学是一个神经科学.
- 时间生物学 时间生物学
- 分子生物学分子生物学
背景情况:
- 长期太空飞行会导致昼夜节律的中断.
- 上神核 (SCN) 是中心的昼夜节律起器.
- 太空飞行引起的昼夜干扰的分子机制尚不清楚.
研究的目的:
- 研究模拟太空飞行条件下的老鼠中昼夜干扰的分子机制.
- 探索菌细胞在SCN中调节昼夜节律中的作用.
- 确定潜在的治疗目标,以减轻太空飞行引起的昼夜干扰.
主要方法:
- 开发了一个模拟微重力和隔离的老鼠模型 (尾部悬挂和隔离 - TSI).
- 分析昼夜节律 (核心体温,心率,运动活动).
- 研究了SCN中的分子变化,包括基因/蛋白质表达和线粒细胞衰变标志物.
主要成果:
- TSI大鼠表现出乱的昼夜节律,特别是降低的振幅.
- NR1D1蛋白水平增加,而mRNA在TSI大鼠SCN中保持不变,这表明后翻译调节.
- 线粒细胞缺陷导致NR1D1降解受损,BMAL1水平降低,TSI大鼠SCN中的线粒体功能障碍.
- 乌罗立A (UA) 是一种线粒激活剂,通过促进NR1D1降解来恢复昼夜节律的幅度.
结论:
- 线性细胞通过控制SCN中的NR1D1降解来调节昼夜节律.
- 损伤的线粒细胞衰变和NR1D1降解有助于太空飞行引起的昼夜干扰.
- 线粒是太空飞行相关的昼夜障碍和SCN功能障碍的潜在治疗标.
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