Cited by 13Circadian rhythm and melatoninNeuropeptides and Animal PhysiologyStress Responses and Cortisol

Changes in vasoactive intestinal peptide and arginine vasopressin expression in the suprachiasmatic nucleus of the rat brain following footshock stress

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Handa, Robert J., Zoeller, R. Thomas, McGivern, Robert F.·2007·Neuroscience Letters

Abstract

The neuropeptides, arginine vasopressin (AVP) and vasoactive intestinal polypeptide (VIP) are synthesized by neurons of the suprachiasmatic nucleus (SCN) of the hypothalamus and are important regulators of SCN function. Previous studies have demonstrated that acute exposure to stressors can disrupt circadian activity rhythms, suggesting the possibility of stress-related alterations in the expression of these neuropeptides within SCN neurons. In this study, we examined the effect of intermittent footshock stress on AVP mRNA and heterogeneous nuclear RNA (hnRNA) and VIP mRNA expression in neurons of the SCN. Young adult male Sprague/Dawley rats were subjected to 15 s of scrambled intermittent footshock (0.50 mA pulses, 1 pulse/s, 300 ms duration) every 5 min for 30 min. Animals were sacrificed 75 or 135 min after the onset of stress and brains examined for AVP mRNA and hnRNA, and VIP mRNA using in situ hybridization. Footshock stress increased AVP hnRNA levels at the 75 min time point whereas AVP mRNA was elevated at both the 75 and 135 min time points. In contrast, footshock stress decreased the number of cells expressing VIP mRNA in the SCN without changing hybridization level per cell. These data indicate that the disruptive effect of stress on activity rhythms correlate with alterations in the expression of regulatory peptides within the SCN.

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Crossref · 10.1016/j.neulet.2007.08.044

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Authors
Handa, R. J., Zoeller, R. T., & McGivern, R. F.
Affiliations
  • Colorado State University (US)
  • University of Massachusetts Amherst (US)
  • San Diego State University (US)
Corresponding author
Handa, Robert J.
Venue
Neuroscience Letters
Publisher
Elsevier BV
Published
2007-09
Volume
425
Issue
2
Pages
99-104
ISSN
0304-3940 (ISSN-L)
OpenAlex
W2085966485
Cited by
13
References
50
Citations by year
2023: 1 · 2021: 2 · 2020: 2 · 2014: 1 · 2012: 1
FWCI
0.68
Type
journal article
Language
en
Open access
Locations
  • Neuroscience Letters (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
Funders
National Institutes of Health (AA011600, AA014974, NS039951)
Topics
  • Life Sciences › Neuroscience › Endocrine and Autonomic Systems › Circadian rhythm and melatonin
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuropeptides and Animal Physiology
  • Life Sciences › Neuroscience › Behavioral Neuroscience › Stress Responses and Cortisol
Keywords
vasoactive intestinal peptide, vasopressin, suprachiasmatic nucleus, neuropeptide gene expression, circadian rhythm, hypothalamic neurons
MeSH terms
Animals, Arginine Vasopressin, Cell Count, Circadian Rhythm, Electric Stimulation, Hypothalamus, Anterior, Image Processing, Computer-Assisted, Male, Paraventricular Hypothalamic Nucleus, RNA, Heterogeneous Nuclear, RNA, Messenger, Stress, Psychological, Suprachiasmatic Nucleus, Time Factors, Vasoactive Intestinal Peptide, Down-Regulation, Up-Regulation, Rats, Sprague-Dawley, In Situ Hybridization, Chronobiology Disorders, Rats

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