State-dependent central chemoreception: a role of orexin.

State-dependent central chemoreception: a role of orexin.
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DOI:
10.1016/j.resp.2010.02.006
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发表时间:
2010-10-31
影响因子:
2.3
通讯作者:
Nattie, Eugene
Nattie, Eugene
中科院分区:
医学4区
文献类型:
--
作者:
Kuwaki, Tomoyuki;Li, Aihua;Nattie, Eugene

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参与中枢化学感受(CCR)的位点广泛分布在大脑中。对多个中枢化学感受器位点存在的一种可能的解释是警惕状态依赖性假设,即某些位点在清醒时更重要,而另一些位点在睡眠中更重要。我们简要总结了中央化学感受器位点的分布式网络以及它们之间的警戒状态依赖性分化的证据。然后,我们基于最近使用食欲素基因敲除小鼠的研究以及大鼠梯形后核和中缝处食欲素受体拮抗剂的局部微透析,讨论了食欲素在警觉状态依赖性 CCR 中的作用。食欲素以一种依赖于警觉状态的方式影响 CCR,该方式随昼夜节律时间而变化。食欲素还有助于情绪压力和其他状态依赖性相关的通气调节,例如防御反应。中枢化学感受的多样性,包括食欲素神经元以及呼吸和心血管输出神经元的突触控制,似乎对于动物适应不断变化的情况和行为状态是必要的。
Sites involved in central chemoreception (CCR) are widely distributed in the brain. One possible explanation for the existence of multiple central chemoreceptor sites is the vigilance state-dependent hypothesis, that some sites are of greater importance in wakefulness others in sleep. We briefly summarize the evidence for a distributed network of central chemoreceptor sites and a vigilance state-dependent differentiation among them. We then discuss the role of orexin in vigilance state-dependent CCR based on our recent studies using orexin knockout mice and focal microdialysis of an orexin receptor antagonist at the retrotrapezoid nucleus and medullary raphé in rats. Orexin affects CCR in a vigilance state-dependent manner that varies with circadian time. Orexin also contributes to emotional stress- and other state-dependent related regulation of ventilation, e.g., the defense response. Diversity in central chemoreception including orexin neurons and the synaptic control of respiratory and cardiovascular output neurons appears to be necessary for animals to adapt themselves to constantly changing situations and behavioral states.
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影响因子: 24.3
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