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Sleep and Biological Rhythms

18-03-2024 | Ovariectomy | Original Article

Impact of ovariectomy on neurotransmitter receptors BDNF/TrkB and endoplasmic reticulum molecular chaperones in rat hypoglossal nucleus

Authors: Huan Lu, Qinhan Wu, Zilong Liu, Shanqun Li

Published in: Sleep and Biological Rhythms

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Abstract

Currently hypoglossal nerve–genioglossus axis is the major research core of OSA pathogenesis. The pathogenesis of OSA incidence changes before and after menopause needs to be clarified further. Little is known about the influences of ovariectomy on hypoglossal motoneurons. In the research, we utilized a rat ovariectomy model to evaluate the expression changes of 5-HT2A and α1-Adrenergic receptors in the hypoglossal nucleus and to explore the involvement of BDNF/TrkB signaling and endoplasmic reticulum molecular chaperones in the hypoglossal nucleus. Results indicated that the expression of 5-HT2A and α1-Adrenergic receptors reduced dramatically in the hypoglossal nucleus of ovariectomized rats. The apoptosis level of hypoglossal motor neurons increased markedly in the OVX groups. The up-regulated expression of BDNF and down-regulated expression of TrkB were found in the OVX groups. Ovarian insufficiency resulted in the activation of UPR and the loss of CANX-CALR cycle. Estrogen replacement could restore these changes partially. Estrogen level influences the expression of neurotransmitter receptors, and regulates BDNF/TrkB signaling compensation and endoplasmic reticulum homeostasis, which might be one of the pathogenesis of menopausal female OSA. The results reveal a new perspective for studying female OSA from the view of hypoglossal nerve and hormonal changes and attempt to propel 17β-estradiol toward a feasible therapy for female OSA.
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Metadata
Title
Impact of ovariectomy on neurotransmitter receptors BDNF/TrkB and endoplasmic reticulum molecular chaperones in rat hypoglossal nucleus
Authors
Huan Lu
Qinhan Wu
Zilong Liu
Shanqun Li
Publication date
18-03-2024
Publisher
Springer Nature Singapore
Published in
Sleep and Biological Rhythms
Print ISSN: 1446-9235
Electronic ISSN: 1479-8425
DOI
https://doi.org/10.1007/s41105-024-00520-5