Cited by 32Circadian rhythm and melatoninSleep and Wakefulness ResearchNeuroendocrine regulation and behavior

Circadian modulation of osmoregulated firing in rat supraoptic nucleus neurones

Trudel, E., Bourque, C. W.·2012·Journal of Neuroendocrinology

Abstract

The antidiuretic hormone vasopressin (VP) promotes water reabsorption from the kidney and levels of circulating VP are normally related linearly to plasma osmolality, aiming to maintain the latter close to a predetermined set point. Interestingly, VP levels rise also in the absence of an increase in osmolality during late sleep in various mammals, including rats and humans. This circadian rhythm is functionally important because the absence of a late night VP surge results in polyuria and disrupts sleep in humans. Previous work has indicated that the VP surge may be caused by facilitation of the central processes mediating the osmotic control of VP release, and the mechanism by which this occurs was recently studied in angled slices of rat hypothalamus that preserve intact network interactions between the suprachiasmatic nucleus (SCN; the biological clock), the organum vasculosum lamina terminalis (OVLT; the central osmosensory nucleus) and the supraoptic nucleus (SON; which contains VP-releasing neurohypophysial neurones). These studies confirmed that the electrical activity of SCN clock neurones is higher during the middle sleep period (MSP) than during the late sleep period (LSP). Moreover, they revealed that the excitation of SON neurones caused by hyperosmotic stimulation of the OVLT was greater during the LSP than during the MSP. Activation of clock neurones by repetitive electrical stimulation, or by injection of glutamate into the SCN, caused a presynaptic inhibition…

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Registry

Crossref · 10.1111/j.1365-2826.2012.02298.x

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  • These AVP neurons receive osmosensitive inputs from the organum vasculosum lamina terminalis via glutamatergic synapses and are modulated by nitric oxide (NO) signaling pathways.

    “These AVP neurons receive osmosensitive inputs from the organum vasculosum lamina terminalis via glutamatergic synapses and are modulated by nitric oxide (NO) signaling pathways (146–148).”

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Authors
Trudel, E., & Bourque, C. W.
Affiliations
Montreal General Hospital (CA)
Corresponding author
Bourque, C. W.
Venue
Journal of Neuroendocrinology
Publisher
Wiley
Published
2012-03-26
Volume
24
Issue
4
Pages
577-586
ISSN
  • 0953-8194 (ISSN-L)
  • 1365-2826
OpenAlex
W1590149656
Cited by
32
References
98
Citations by year
2026: 2 · 2025: 2 · 2023: 2 · 2022: 3 · 2021: 1 · 2019: 2 · 2018: 6 · 2017: 4 · 2016: 3 · 2015: 2 · 2014: 1 · 2013: 3 · 2012: 1
FWCI
0.26
Type
journal article
Language
en
Open access
closed
Locations
  • Journal of Neuroendocrinology (publishedVersion)
  • PubMed (publishedVersion)
Funders
Canadian Institutes of Health Research (MOP9939)
Topics
  • Life Sciences › Neuroscience › Endocrine and Autonomic Systems › Circadian rhythm and melatonin
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Sleep and Wakefulness Research
  • Social Sciences › Psychology › Social Psychology › Neuroendocrine regulation and behavior
Keywords
vasopressin, circadian rhythm, supraoptic nucleus, suprachiasmatic nucleus, organum vasculosum of the lamina terminalis, osmoregulation, plasma osmolality, sleep, glutamatergic synapses, presynaptic inhibition, disinhibition, neurohypophyseal neurons, hypothalamus, polyuria
MeSH terms
Animals, Biological Clocks, Circadian Rhythm, Humans, Hypothalamus, Neural Inhibition, Neurons, Suprachiasmatic Nucleus, Supraoptic Nucleus, Vasopressins, Water-Electrolyte Balance, Rats

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