Cited by 103Stress Responses and CortisolAdrenal Hormones and DisordersHypothalamic control of reproductive hormones

Continuous administration of synthetic ovine corticotropin-releasing factor in man. Physiological and pathophysiological implications

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Schulte, H M, Chrousos, G P, Gold, P W, Booth, J D, Oldfield, E H, Cutler, G B, Loriaux, D L·1985·Journal of Clinical Investigation

Abstract

The continuous 24-h infusion of a maximally stimulating dose (1 micrograms/kg per h) of ovine corticotropin-releasing factor (CRF) in man caused a modest elevation of plasma cortisol (17.2 +/- 1.4 micrograms/dl) and urinary-free cortisol (173 +/- 43 micrograms/24 h) concentrations, which was far less than that seen with a maximally stimulating dose of ACTH (50.4 +/- 2.2 micrograms/dl and 1,200 +/- 94 micrograms/24 h, respectively). The circadian rhythms of plasma ACTH and cortisol were preserved during CRF administration. An intravenous bolus injection of 1 microgram/kg of ovine CRF given to normal volunteers under basal conditions resulted in elevated plasma ACTH and cortisol peak levels (28 +/- 6 pg/ml and 15.0 +/- 1.0 micrograms/dl, respectively). However, no plasma ACTH and cortisol responses were observed when an identical CRF stimulation test was given at the end of the continuous infusion. These findings suggest that the stimulatory activity of exogenous CRF on the ACTH-secreting cells of the pituitary gland is restrained by the negative feedback of cortisol. The persistent circadian rhythm of ACTH, despite a constant level of plasma CRF during the infusion, suggests that the circadian variation in the activity of the hypothalamic-pituitary-adrenal axis cannot be explained solely by circadian periodicity of the endogenous CRF stimulus.

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  1. [10]10. Yates, F. E., and J. W. Maran. 1974. Handbook of Physiology, Section 7, Endocrinology IV, part 2, Washington, D. C. American Physiological Society, pp. 367-404.

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Authors
Schulte, H. M., Chrousos, G. P., Gold, P. W., Booth, J. D., Oldfield, E. H., Cutler, G. B., & Loriaux, D. L.
Affiliations
National Institutes of Health (US)
Venue
Journal of Clinical Investigation
Published
1985-06-01
Volume
75
Issue
6
Pages
1781-1785
ISSN
0021-9738 (ISSN-L)
OpenAlex
W2079168311
Cited by
103
References
36
Citations by year
2022: 1 · 2018: 1 · 2017: 2 · 2016: 1 · 2013: 1
FWCI
3.92
Type
journal article
Language
en
Open access
Locations
  • Journal of Clinical Investigation (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Life Sciences › Neuroscience › Behavioral Neuroscience › Stress Responses and Cortisol
  • Health Sciences › Medicine › Endocrinology, Diabetes and Metabolism › Adrenal Hormones and Disorders
  • Health Sciences › Medicine › Reproductive Medicine › Hypothalamic control of reproductive hormones
Keywords
corticotropin-releasing factor, ovine CRF, continuous infusion, ACTH secretion, cortisol, hypothalamic-pituitary-adrenal axis, negative feedback, circadian rhythm, ACTH stimulation test
MeSH terms
Adrenal Glands, Adrenocorticotropic Hormone, Adult, Animals, Circadian Rhythm, Corticotropin-Releasing Hormone, Cushing Syndrome, Female, Hormones, Humans, Hydrocortisone, Hypothalamo-Hypophyseal System, Male, Middle Aged, Secretory Rate, Sheep

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