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在老鼠中,循环时间的IOP节奏是由来自大脑的神经信号驱动的

Alexandra Zamitalo, Christopher L Passaglia

bioRxiv : the preprint server for biology

|November 24, 2025

概括

在老鼠中,眼内压力 (IOP) 的昼夜节律是由交感神经驱动的,而不是眼睛的局部机制或荷尔蒙. 上性瘤切除术消除了每日IOP周期,揭示了同情输入作为关键调节器.

科学领域:

眼科医生眼科眼科
神经科学是一个神经科学.
时间生物学时间生物学

背景情况:

眼内压力 (IOP) 显示出显著的昼夜节律.
产生这种IOP节奏的精确机制尚不清楚.
潜在的来源包括局部眼因子,神经信号或幽默输入.

研究的目的:

为了确定大鼠的昼夜IOP节奏是否来源于局部眼动振荡器.
研究非局部神经或幽默输入在调节昼夜IOP节奏中的作用.

主要方法:

在使用遥测的老鼠中持续监测IOP.
服用四毒素 (TTX) 来阻断通道.
顶部关节切除术 (SCGx) 来破坏交感输入.

主要成果:

单方面和暂时地,TTX降低了夜间IOP,这表明了局部同情性异常活动.
SCGx完全取消了昼夜内血压节奏,消除了夜间内血压升高.
结果排除了内在的眼睛振荡器和循环的幽默信号作为节律驱动器.

结论:

在老鼠中,IOP的昼夜节律主要是由来自上性关节的交感性异射信号驱动的.
这些发现强调了昼夜IOP调节的物种特异性差异.
这项研究为研究青光眼模型中的IOP节奏机制提供了基础.

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