在雄性小鼠中,通过甲状腺激素状态调整肝脏昼夜转录组节律
Leonardo Vinicius Monteiro de Assis1,2, Lisbeth Harder3,4, José Thalles Lacerda5
1Center of Brain Behavior and Metabolism, Institute of Neurobiology, University of Lübeck, Marie Curie Street, 23562, Lübeck, Germany. leonardo.deassis@uni-luebeck.de.
Scientific reports
|January 5, 2024
概括
甲状腺激素 (THs) 调节能量代谢. 这项研究揭示了低TH水平如何扰乱昼夜节律,改变肝脏基因表达,影响胆固醇代谢,并确定肝脏TH状态的新分子标志物.
科学领域:
- 内分泌学 在内分泌学.
- 时间生物学 时间生物学
- 分子生物学分子生物学
背景情况:
- 甲状腺激素 (THs) 对于调节全身能量代谢至关重要,影响肝脏中的脂质和胆固醇循环.
- THs与昼夜时钟 (能量代谢的另一个关键调节器) 之间的相互作用仍然不太清楚.
研究的目的:
- 研究甲状腺激素状态和昼夜时钟在调节肝脏能量代谢中的相互作用.
- 根据每天的时间来确定表明肝脏甲状腺激素作用的分子标志物.
主要方法:
- 利用甲状腺功能低下症的小鼠模型进行昼夜分析.
- 在低和高TH条件下进行肝转录组分析,以比较基因表达.
- 分析了转录水平中位数,振幅和相位的变化.
主要成果:
- 低TH水平降低了运动活动,食物摄入量和体温,主要是在活跃阶段.
- 在低TH的小鼠中,循环转录组分析显示了基因表达模式的改变,特别是对于参与胆固醇和胆汁酸代谢的基因.
- 在甲状腺功能低下小鼠中发现血清胆固醇增加和肝脏胆固醇水平降低.
- 发现了516个基因与改变的介质作为肝脏TH状态的分子标记,独立于一天中的时间.
结论:
- 肝脏在生理条件下表现出较低的甲状腺激素作用.
- 循环造型鉴定了特定的基因,这些基因可以作为评估肝脏甲状腺激素状况的潜在分子标记.
- 开发了一个表达面板,以依赖一天时间的方式评估肝脏TH状态.
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