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在产后发育期间的Cry1表达对于建立正常的昼夜周期至关重要

Aaron E Schirmer^1,2, Vivek Kumar^1,3, Andrew Schook¹

¹Department of Neurobiology, Northwestern University, Evanston, IL, United States.

Frontiers in neuroscience

|June 30, 2023

概括

节律性加密染色体1 (Cry1) 表达对于维持昼夜节律至关重要. 过度表达Cry1可以恢复正常的每日活动模式在小鼠中与被破坏的昼夜时钟.

科学领域:

时间生物学时间生物学
分子生物学分子生物学
遗传学是一个遗传学.

背景情况:

哺乳动物的昼夜节律是由一个复杂的自我调节反循环控制的,该循环涉及Period (Per) 和Cryptochrome (Cry) 蛋白质.
虽然Per和Cry蛋白具有不同的作用,但它们对核心昼夜机制的个人贡献仍然不完全理解.

研究的目的:

研究密码染色体1 (Cry1) 和密码染色体2 (Cry2) 的转录振荡在维持昼夜活动节律中的作用.
阐明Cry1在调节昼夜周期和行为周期性方面的特定功能.

主要方法:

利用四环素转激活器系统 (tTA) 来操纵基因表达.
研究了Cry1表达水平和节奏改变对小鼠模型中昼夜活动模式的影响.

主要成果:

证明节奏Cry1表达是昼夜周期长度的关键调节者.
确定了一个关键的发育窗口 (出生至产后45天),Cry1水平对于确定成人自由运行时期至关重要.
显示Cry1过度表达可以恢复正常的行为周期性,即使在被破坏昼夜节律的小鼠中也是如此.

结论:

节律性Cry1表达在昼夜活动节律的持续性方面发挥着重要作用.
在特定的发育阶段,Cry1对于设置内源性昼夜周期至关重要.
在生物钟中断的情况下,Cry1具有恢复昼夜节律的治疗潜力.

关键词:

昼夜节律是指昼夜节律的节奏.这就是加密色彩 (Cryptochrome).发展发展发展发展发展.基因表达的基因表达方式时间长度时间长度时间长度

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