Cited by 285Neuroendocrine regulation and behaviorStress Responses and CortisolNeuropeptides and Animal Physiology

Brain oxytocin inhibits the (re)activity of the hypothalamo–pituitary–adrenal axis in male rats: involvement of hypothalamic and limbic brain regions

Neumann, Inga D, Krömer, Simone A, Toschi, Nicola, Ebner, Karl·2000·Regulatory Peptides

Abstract

In response to various stressors, oxytocin is released not only into blood, but also within hypothalamic and extrahypothalamic limbic brain regions. Here, we describe the involvement of intracerebrally released oxytocin in the regulation of the activity of the hypothalamo-pituitary-adrenal (HPA) axis by infusion of the oxytocin receptor antagonist (des Gly-NH(2) d(CH(2))(5) [Tyr(Me)(2), Thr(4)] OVT; pH 7.4; Dr. M. Manning, Toledo, OH, USA) either into the lateral cerebral ventricle (icv[0.75 microg/5 microl,]) or via retrodialysis (10 microg/ml, 3.3 microl/min, 15 min) into the hypothalamic paraventricular nuclei (PVN), the medio-lateral septum or the amygdala. Male Wistar rats fitted with a chronic jugular vein catheter and an icv guide cannula or a microdialysis probe targeting the respective brain region 4 days prior to the experiment were blood sampled under basal as well as stressful conditions. Rats were exposed to the elevated platform (emotional stressor) and/or to forced swimming (combined physical and emotional stressor). Blockade of the receptor-mediated action of endogenous oxytocin within the PVN resulted in an enhanced basal secretion of ACTH whereas, in response to forced swimming, ACTH secretion was rather reduced, indicating a tonic inhibitory effect of OXT on basal HPA axis activity, but a potentiating action under conditions of stress. Within the medio-lateral septum, antagonist treatment did not alter basal ACTH secretion, but significantly disinhibited AC…

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Crossref · 10.1016/s0167-0115(00)00197-x

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Authors
Neumann, I. D., Krömer, S. A., Toschi, N., & Ebner, K.
Affiliations
  • Max Planck Institute of Psychiatry (DE)
  • Max Planck Society (DE)
Corresponding author
Neumann, Inga D
Venue
Regulatory Peptides
Publisher
Elsevier BV
Published
2000-12
Volume
96
Issue
1-2
Pages
31-38
ISSN
0167-0115 (ISSN-L)
OpenAlex
W1997454271
Cited by
285
References
12
Citations by year
2026: 6 · 2025: 3 · 2024: 10 · 2023: 7 · 2022: 10 · 2021: 20 · 2020: 12 · 2019: 13 · 2018: 21 · 2017: 20 · 2016: 12 · 2015: 5 · 2014: 12 · 2013: 21 · 2012: 9
FWCI
9.26
Type
journal article
Language
en
Open access
closed
Locations
  • Regulatory Peptides (publishedVersion)
  • PubMed (publishedVersion)
  • Cineca Institutional Research Information System (Tor Vergata University) (submittedVersion)
  • Max Planck Institute for Plasma Physics (submittedVersion)
  • MPG.PuRe (Max Planck Society) (submittedVersion)
Funders
  • Deutsche Forschungsgemeinschaft
  • Consejo Nacional de Ciencia y Tecnología
Topics
  • Social Sciences › Psychology › Social Psychology › Neuroendocrine regulation and behavior
  • Life Sciences › Neuroscience › Behavioral Neuroscience › Stress Responses and Cortisol
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuropeptides and Animal Physiology
Keywords
oxytocin, hypothalamic-pituitary-adrenal axis, ACTH secretion, oxytocin receptor antagonist, paraventricular nucleus, medial septum, amygdala, stress response, forced swim test, elevated platforms, limbic system
MeSH terms
Adrenocorticotropic Hormone, Animals, Brain Chemistry, Hormone Antagonists, Hypothalamo-Hypophyseal System, Male, Ornipressin, Oxytocin, Pituitary-Adrenal System, Stress, Physiological, Swimming, Rats, Wistar, Receptors, Oxytocin, Rats

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