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The role of orexinergic system in the regulation of cataplexy.

Authors :
Koyama Y
Source :
Peptides [Peptides] 2023 Nov; Vol. 169, pp. 171080. Date of Electronic Publication: 2023 Aug 19.
Publication Year :
2023

Abstract

Loss of orexin/hypocretin causes serious sleep disorder; narcolepsy. Cataplexy is the most striking symptom of narcolepsy, characterized by abrupt muscle paralysis induced by emotional stimuli, and has been considered pathological activation of REM sleep atonia system. Clinical treatments for cataplexy/narcolepsy and early pharmacological studies in narcoleptic dogs tell us about the involvement of monoaminergic and cholinergic systems in the control of cataplexy/narcolepsy. Muscle atonia may be induced by activation of REM sleep-atonia generating system in the brainstem. Emotional stimuli may be processed in the limbic systems including the amygdala, nucleus accumbens, and medial prefrontal cortex. It is now considered that orexin/hypocretin prevents cataplexy by modulating the activity of different points of cataplexy-inducing circuit, including monoaminergic/cholinergic systems, muscle atonia-generating systems, and emotion-related systems. This review will describe the recent advances in understanding the neural mechanisms controlling cataplexy, with a focus on the involvement of orexin/hypocretin system, and will discuss future experimental strategies that will lead to further understanding and treatment of this disease.<br />Competing Interests: Conflict of interest The author declares no conflicts of interest.<br /> (Copyright © 2023 Elsevier Inc. All rights reserved.)

Details

Language :
English
ISSN :
1873-5169
Volume :
169
Database :
MEDLINE
Journal :
Peptides
Publication Type :
Academic Journal
Accession number :
37598758
Full Text :
https://doi.org/10.1016/j.peptides.2023.171080