A Role for Orexin in Central Vestibular Motor Control

A Role for Orexin in Central Vestibular Motor Control
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食欲素在中枢前庭运动控制中的作用

DOI:
10.1016/j.neuron.2011.01.026
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发表时间:
2011-02
期刊:
影响因子:
16.2
通讯作者:
Wang, Jian-Jun
Wang, Jian-Jun
中科院分区:
医学1区
文献类型:
--
作者:
Zhang, Jun;Li, Bin;Yu, Lei;He, Ye-Cheng;Li, Hong-Zhao;Zhu, Jing-Ning;Wang, Jian-Jun

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缺乏食欲素会导致发作性睡病-突倒。虽然中枢食欲素能系统在睡眠调节中的功能已经得到了很好的研究,但食欲素在运动控制中的作用在很大程度上是未知的。在这里,我们表明orexin-A的行为,通过OX 1和OX 2受体直接去兴奋神经元在大鼠前庭外侧核(LVN),皮质下运动中心,并提高其敏感性。一个双离子机制,涉及Na+-Ca 2+交换和内向整流K+通道的基础上这些效果。此外,食欲素-A调节中枢前庭介导的姿势,运动平衡和负趋地性。当动物面临重大运动挑战时,食欲素是至关重要的,而不是在休息和一般运动期间。因此,食欲素不仅参与睡眠和情绪(非躯体),而且还参与运动(躯体)调节,表明中枢食欲素能系统在躯体-非躯体整合中起着重要作用。这些发现可能解释了为什么食欲素的缺乏会导致发作性睡病。
The absence of orexin results in narcolepsy-cataplexy. While the function of the central orexinergic system in sleep regulation has been well studied, the role of orexin in motor control is largely unknown. Here, we show that orexin-A acts via OX1and OX2receptors to directly depolarize neurons in the rat lateral vestibular nucleus (LVN), a subcortical motor center, and enhance their sensitivity. A dual ionic mechanism involving both Na+-Ca2+exchangers and inward rectifier K+channels underlies these effects. Furthermore, orexin-A regulates central vestibular-mediated posture, motor balance and negative geotaxis. Orexin is critical when an animal is facing a major motor challenge as opposed to during rest and general movements. Therefore, orexin participates not only in sleep and emotion (nonsomatic) but also in motor (somatic) regulation, suggesting that the central orexinergic system plays an important role in somatic-nonsomatic integration. These findings may account for why the absence of orexin results in narcolepsy-cataplexy.
DOI: 10.1152/jn.00201.2003
发表时间: 2003-09
影响因子: 2.5
作者:
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期刊: The Cerebellum
影响因子: --
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发表时间: 1978
影响因子: 33.6
作者:
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