Cited by 117Stress Responses and CortisolNeuropeptides and Animal PhysiologyAdrenal Hormones and Disorders

Arginine Vasopressin Is a Much More Potent Stimulus to ACTH Release from Ovine Anterior Pituitary Cells than Ovine Corticotropin-Releasing Factor

Familari, Mary, Smith, Ian, Smith, Robin, Funder, John W.·2008·Neuroendocrinology

Abstract

Cultured rat and ovine anterior pituitary cells were treated with a range of doses (0.01-1,000 nM) of arginine vasopressin (AVP) and ovine corticotropin-releasing factor (CRF), alone or in combination, and medium and cell content of immunoreactive (ir-)ACTH determined. In rat cells, a dose-response curve to CRF was obtained, with a threshold dose of 0.1 nM; AVP was much less effective alone, but augmented CRF responses when administered with CRF. In ovine pituitary cells AVP markedly stimulated ACTH release in a dose-dependent fashion, and with a threshold of 0.1 nM; in contrast, CRF increased ACTH release over basal only at doses greater than 100 nM. In combination, subthreshold doses of AVP potentiated rat pituitary cell responses to CRF; addition of 1 nM of AVP to varying doses of CRF was more effective in terms of ACTH release than addition of 1 nM of CRF to increasing doses of AVP. In contrast, in ovine cells the addition of 1 nM CRF to increasing doses of AVP elicited a larger ACTH response than the addition of 1 nM AVP to increasing doses of CRF. Dexamethasone pretreatment (5 nM) for 48 h significantly decreased CRF potentiation of AVP-stimulated ACTH release in ovine cells. These studies confirm that CRF is a more potent stimulus of ACTH release than AVP in the rat, and establish that in contrast AVP is a much more potent stimulus of ACTH secretion than CRF in isolated ovine pituitary cells.

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Crossref · 10.1159/000125214

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Authors
Familari, M., Smith, I., Smith, R., & Funder, J. W.
Venue
Neuroendocrinology
Publisher
S. Karger AG
Published
2008-04-02
Volume
50
Issue
2
Pages
152-157
ISSN
  • 0028-3835 (ISSN-L)
  • 1423-0194
OpenAlex
W2042841775
Cited by
116
References
0
Citations by year
2025: 2 · 2024: 1 · 2022: 1 · 2020: 1 · 2019: 2 · 2018: 1 · 2017: 1 · 2016: 3 · 2015: 2 · 2014: 4 · 2013: 3
FWCI
0.74
Type
journal article
Language
en
Open access
closed
Locations
  • Neuroendocrinology (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Life Sciences › Neuroscience › Behavioral Neuroscience › Stress Responses and Cortisol
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuropeptides and Animal Physiology
  • Health Sciences › Medicine › Endocrinology, Diabetes and Metabolism › Adrenal Hormones and Disorders
Keywords
vasopressin, corticotropin-releasing factor, ACTH secretion, anterior pituitary cells, ovine pituitary, rat pituitary, hormone potentiation, dexamethasone
MeSH terms
Adrenocorticotropic Hormone, Animals, Arginine Vasopressin, Cells, Cultured, Corticotropin-Releasing Hormone, Dexamethasone, Dose-Response Relationship, Drug, Drug Synergism, Female, Male, Pituitary Gland, Anterior, Rats, Inbred Strains, Sheep, Stress, Physiological, Rats

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