Cited by 276Stress Responses and CortisolAdrenal Hormones and DisordersNeuropeptides and Animal Physiology

The DOI matches its Crossref record; 26 of the 37 references it cites were found in a registry or an index, and 4 are not checked yet.

Ultradian rhythm of basal corticosterone release in the female rat: dynamic interaction with the response to acute stress

Abstract

The present study investigated the dynamic regulation of the hypothalamo-pituitary-adrenal axis and its significance to acute stress responsiveness in the female rat. An automated, frequent blood-sampling technique allowed the circadian rhythm of corticosterone to be resolved into a series of pulses. These were equally distributed (mean interval, 50.9 ± 3.7 min) throughout the 24-h cycle, but their magnitude varied significantly, being higher between 1800–2200 h (137 ± 9 ng/ml) than between 0600–1000 h (75 ± 17 ng/ml). This pattern of release indicates continuous, but variable, activity of the axis throughout the day. The pulsatile ultradian rhythm suggested alternate periods of secretion and inhibition, which were found to have a profound effect on the corticosterone responses to acute stress. Noise stress (10 min, 114 decibels) evoked a transient increase in corticosterone, which reached a maximum (377 ± 87 ng/ml) 20 min after onset. However, within this group (n = 26) the response varied depending on the underlying basal activity. When stress coincided with a rising (secretory) phase of a pulse, corticosterone concentrations rose to 602 ± 150% of mean basal concentrations (P < 0.001). In contrast, when stress coincided with a falling (nonsecretory) phase of a pulse, a significantly smaller response, no greater than a basal pulse, was evoked. Thus, the alternate periods of secretion and inhibition generating basal hypothalamo-pituitary-adrenal activity are an important determinant of responses to acute stress.

Overview

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Crossref · 10.1210/endo.139.2.5721

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26 of 37 references verified0 citation errors · 7 not checkable

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Metadata

Authors
Windle, R. J., Wood, S. A., Shanks, N., Lightman, S. L., & Ingram, C. D.
Affiliations
  • Bristol Royal Infirmary (GB)
  • University of Bristol (GB)
Corresponding author
Windle, R. J.
Venue
Endocrinology
Published
1998-02-01
Volume
139
Issue
2
Pages
443-450
ISSN
  • 0013-7227 (ISSN-L)
  • 1945-7170
OpenAlex
W2148022513
Cited by
276
References
37
Citations by year
2026: 1 · 2025: 3 · 2024: 5 · 2023: 3 · 2022: 11 · 2021: 12 · 2020: 9 · 2019: 8 · 2018: 14 · 2017: 11 · 2016: 15 · 2015: 10 · 2014: 13 · 2013: 15 · 2012: 9
FWCI
4.01
Type
journal article
Language
en
Open access
closed
Locations
  • Endocrinology (publishedVersion)
  • PubMed (publishedVersion)
Funders
Wellcome Trust
Topics
  • Life Sciences › Neuroscience › Behavioral Neuroscience › Stress Responses and Cortisol
  • Health Sciences › Medicine › Endocrinology, Diabetes and Metabolism › Adrenal Hormones and Disorders
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuropeptides and Animal Physiology
Keywords
ultradian rhythms, corticosterone, hypothalamic-pituitary-adrenal axis, acute stress response, noise stress, pulsatile hormone secretion, circadian rhythm, female rats
MeSH terms
Activity Cycles, Acute Disease, Animals, Circadian Rhythm, Corticosterone, Female, Noise, Sex Characteristics, Stress, Physiological, Rats, Sprague-Dawley, Rats

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