Cited by 239Growth Hormone and Insulin-like Growth FactorsHypothalamic control of reproductive hormonesSleep and Wakefulness Research

Thirty-Second Sampling of Plasma Growth Hormone in Man: Correlation with Sleep Stages*

HOLL, REINHARD W., HARTMAN, MARK L., VELDHUIS, JOHANNES D., TAYLOR, WILLIAM M., THORNER, MICHAEL O.·1991·The Journal of Clinical Endocrinology & Metabolism

Abstract

Both fasting and sleep increase the secretion of human GH and, therefore, might explain its predominantly nocturnal release. To study the precise temporal relationship between GH secretory episodes and cortical activity, GH measurements and electroencephalogram sleep stage recordings were performed every 30 s for 8 h in six young male volunteers fasted for 24 h. GH was measured in two drops of whole blood, which were directly sampled into the assay tube using a continuous blood withdrawal pump and a fraction collector. Concomitant serum sampling during a GH-releasing hormone test (n = 4) revealed a high correlation (r = 0.98) between GH measurements in serum and whole blood. GH pulses were objectively identified with Cluster analysis, and GH secretion rates were calculated with a waveform-independent deconvolution algorithm. When data were analyzed as replicates with 1-min intervals, the nocturnal pulse frequency was 1.2 pulses/h. Elimination of data points demonstrated 43% and 64% reductions in the number of GH pulses detected for 5- and 20-min sampling intervals, respectively. Mean GH concentrations and secretory rates were significantly higher during stage 3 and 4 sleep compared to stage 1, 2, and rapid eye movement sleep. GH secretory rates and peripheral GH concentrations were maximally correlated with sleep stage, with lags of 4.5 and 16 min, respectively, suggesting that maximal GH release occurs within minutes of the onset of stage 3 or 4 sleep. This temporal coincidence between pituitary GH secretion and delta sleep is consistent with cortical control over hypothalamic-pituitary function.

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Crossref · 10.1210/jcem-72-4-854

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Authors
HOLL, R. W., HARTMAN, M. L., VELDHUIS, J. D., TAYLOR, W. M., & THORNER, M. O.
Affiliations
  • University of Virginia (US)
  • University of Virginia Health System (US)
Corresponding author
HOLL, REINHARD W.
Venue
The Journal of Clinical Endocrinology & Metabolism
Published
1991-04
Volume
72
Issue
4
Pages
854-861
ISSN
  • 0021-972X (ISSN-L)
  • 1945-7197
OpenAlex
W1979710595
Cited by
239
References
27
Citations by year
2026: 2 · 2025: 7 · 2024: 5 · 2023: 4 · 2022: 7 · 2021: 6 · 2020: 5 · 2019: 3 · 2018: 5 · 2017: 5 · 2016: 9 · 2015: 10 · 2014: 4 · 2013: 9 · 2012: 5
FWCI
5.34
Type
journal article
Language
en
Open access
closed
Locations
  • The Journal of Clinical Endocrinology & Metabolism (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Institutes of Health (5k04hd000634-02)
  • National Heart, Lung, and Blood Institute (HL-16806)
  • National Institute of Diabetes and Digestive and Kidney Diseases (R01DK032632, DK32632)
  • Eunice Kennedy Shriver National Institute of Child Health and Human Development (1-K04-HD-00634)
Topics
  • Health Sciences › Medicine › Endocrinology, Diabetes and Metabolism › Growth Hormone and Insulin-like Growth Factors
  • Health Sciences › Medicine › Reproductive Medicine › Hypothalamic control of reproductive hormones
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Sleep and Wakefulness Research
Keywords
growth hormone secretion, sleep stages, REM sleep, delta sleep, fasting
MeSH terms
Adult, Blood Specimen Collection, Circadian Rhythm, Humans, Male, Pulsatile Flow, Sleep Stages, Growth Hormone, Immunoradiometric Assay

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