Adaptation of the 24-h growth hormone profile to a state of sleep debt
Abstract
In normal men, the majority of GH secretion occurs in a single large postsleep onset pulse that is suppressed during total sleep deprivation. We examined the impact of semichronic partial sleep loss, a highly prevalent condition, on the 24-h growth hormone profile. Eleven young men were studied after six nights of restricted bedtimes (0100-0500) and after 7 nights of extended bedtimes (2100-0900). Slow-wave sleep (SWS) was estimated as the duration of stages III and IV. Slow-wave activity (SWA) was calculated as electroencephalogram power density in the 0.5- to 3-Hz frequency range. During the state of sleep debt, the GH secretory pattern was biphasic, with both a presleep onset "circadian" pulse and a postsleep onset pulse. Postsleep onset GH secretion was negatively related to presleep onset secretion and tended to be positively correlated with the amount of concomitant SWA. When sleep was restricted, both SWS and SWA were increased during early sleep. Unexpectedly, the increase in SWA affected the second, rather than the first, SWA cycle, suggesting that presleep onset GH secretion may have limited SWA in the first cycle, possibly via an inhibition of central GH-releasing hormone activity. Thus neither the GH profile nor the distribution of SWA conformed with predictions from acute sleep deprivation studies, indicating that adaptation mechanisms are operative during chronic partial sleep loss.
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Glucose effectiveness was 30% lower in the state of sleep debt.
“SG was 30% lower in the state of sleep debt.”
From Role of sleep duration in the regulation of glucose metabolism and appetite (2010) · cites this paper as [18]
Acute insulin response to glucose was reduced by more than 30% after sleep restriction despite a trend for decreased insulin sensitivity.
“AIRg was reduced by more than 30% after sleep restriction despite a trend for decreased SI.”
From Role of sleep duration in the regulation of glucose metabolism and appetite (2010) · cites this paper as [18]
In the first partial sleep deprivation study, glucose tolerance was lower in the sleep-debt condition than in the fully rested condition.
“Glucose tolerance, assessed during an intravenous glucose tolerance test (ivGTT) and a high-carbohydrate breakfast, was lower in the sleep-debt condition than in the fully rested condition.”
From Role of sleep duration in the regulation of glucose metabolism and appetite (2010) · cites this paper as [18]
Partial and total sleep deprivation cause delay and/or reduction in cortisol acrophase.
“In addition, a delay and/or a reduction in the acrophase of cortisol have been reported after partial and total sleep deprivation.95,102,109”
From Interacting epidemics? Sleep curtailment, insulin resistance, and obesity (2012) · cites this paper as [102]
Partial sleep deprivation does not affect 24-hour GH levels in lean or obese individuals, but six 4-hour nights change GH nocturnal secretory patterns to a biphasic pattern.
“Partial sleep deprivation did not affect 24-h levels of GH in lean or obese individuals,101,109,118 but six 4-h nights changed GH nocturnal secretory patterns: sleep deprivation was associated with a biphasic pattern compared to the usual single large GH peak at sleep onset.102”
From Interacting epidemics? Sleep curtailment, insulin resistance, and obesity (2012) · cites this paper as [102]
Short-term decreases in sleep quantity or quality interfere with secretion of anabolic hormones (growth hormone, prolactin, testosterone).
“can interfere with the secretion of anabolic hormones (growth hormone [27], prolactin [28], testosterone, [29])”
From Metabolic effects of sleep disruption, links to obesity and diabetes (2014) · cites this paper as [27]
Cites
Rechtschaffen, A. (1968) · Medical Entomology and Zoology · Cited by 11,772 · see citing works
Procedures for Detecting Outlying Observations in Samples
Grubbs, F. E. (1969) · Technometrics · doi:10.1080/00401706.1969.10490657 · Cited by 4,105 · see citing works
Impact of sleep debt on metabolic and endocrine function
Spiegel, K., Leproult, R., & Van Cauter, E. (1999) · The Lancet · doi:10.1016/s0140-6736(99)01376-8 · Cited by 3,668 · see citing works
Self-citationGrowth hormone secretion during sleep
Takahashi, Y., KIPNIS, D. M., & Daughaday, W. H. (1968) · Journal of Clinical Investigation · doi:10.1172/jci105893 · Cited by 799 · see citing works
Roles of Circadian Rhythmicity and Sleep in Human Glucose Regulation
Cauter, E. V., Polonsky, K. S., & Scheen, A. J. (1997) · Endocrine Reviews · doi:10.1210/edrv.18.5.0317 · Cited by 611 · see citing works
We are Chronically Sleep Deprived
Bonnet, M. H., & Arand, D. L. (1995) · SLEEP · doi:10.1093/sleep/18.10.908 · Cited by 478 · see citing works
Modulation of glucose regulation and insulin secretion by circadian rhythmicity and sleep
Van Cauter, E., Blackman, J. D., Roland, D., Spire, J. P., Refetoff, S., & Polonsky, K. S. (1991) · Journal of Clinical Investigation · doi:10.1172/jci115396 · Cited by 448 · see citing works
Self-citationHuman Growth Hormone Release: Relation to Slow-Wave Sleep and Sleep-Waking Cycles
Sassin, J. F., Parker, D. C., Mace, J. W., Gotlin, R. W., Johnson, L. C., & Rossman, L. G. (1969) · Science · doi:10.1126/science.165.3892.513 · Cited by 413 · see citing works
Interrelations Between Sleep and the Somatotropic Axis
Cauter, E. V., Plat, L., & Copinschi, G. (1998) · SLEEP · doi:10.1093/sleep/21.6.553 · Cited by 243 · see citing works
Self-citationThirty-Second Sampling of Plasma Growth Hormone in Man: Correlation with Sleep Stages*
HOLL, R. W., HARTMAN, M. L., VELDHUIS, J. D., TAYLOR, W. M., & THORNER, M. O. (1991) · The Journal of Clinical Endocrinology & Metabolism · doi:10.1210/jcem-72-4-854 · Cited by 239 · see citing works
Van Cauter, E., Plat, L., Scharf, M. B., Leproult, R., Cespedes, S., L'Hermite-Balériaux, M., & Copinschi, G. (1997) · Journal of Clinical Investigation · doi:10.1172/jci119587 · Cited by 234 · see citing works
Self-citationSteiger, A., Guldner, J., Hemmeter, U., Rothe, B., Wiedemann, K., & Holsboer, F. (2008) · Neuroendocrinology · doi:10.1159/000126275 · Cited by 209 · see citing works
Van Cauter, E. (1992) · Journal of Clinical Endocrinology & Metabolism · doi:10.1210/jc.74.6.1441 · Cited by 205 · see citing works
Self-citationEffects of a growth hormone pulse on total and forearm substrate fluxes in humans
Moller, N., Jorgensen, J. O., Schmitz, O., Moller, J., Christiansen, J., Alberti, K. G., & Orskov, H. (1990) · American Journal of Physiology-Endocrinology and Metabolism · doi:10.1152/ajpendo.1990.258.1.e86 · Cited by 194 · see citing works
Effects of growth hormone on insulin sensitivity and forearm metabolism in normal man
M�ller, N., Butler, P. C., Antsiferov, M. A., & Alberti, K. G. M. M. (1989) · Diabetologia · doi:10.1007/bf00505182 · Cited by 192 · see citing works
Growth Hormone Secretion During Nocturnal Sleep in Normal Subjects1
Honda, Y., Takahashi, K., Takahashi, S., Azumi, K., Irie, M., Sakuma, M., Tsushima, T., & Shizume, K. (1969) · The Journal of Clinical Endocrinology & Metabolism · doi:10.1210/jcem-29-1-20 · Cited by 189 · see citing works
Estimating false-positive and false-negative errors in analyses of hormonal pulsatility
Cauter, E. V. (1988) · American Journal of Physiology-Endocrinology and Metabolism · doi:10.1152/ajpendo.1988.254.6.e786 · Cited by 177 · see citing works
Insufficient sleep in the general population
Broman, J., Lundh, L. G., & Hetta, J. E. (1996) · Neurophysiologie Clinique · doi:10.1016/0987-7053(96)81532-2 · Cited by 167 · see citing works
Diurnal Hypersecretion of Growth Hormone in Depression*
Mendlewicz, J., Linkowski, P., Kerkhofs, M., Desmedt, D., GOLSTEIN, J., Copinschi, G., & Cauter, E. V. (1985) · The Journal of Clinical Endocrinology & Metabolism · doi:10.1210/jcem-60-3-505 · Cited by 161 · see citing works
Self-citationSleep-promoting effects of growth hormone-releasing hormone in normal men
Kerkhofs, M., Cauter, E. V., Onderbergen, A. V., Caufriez, A., Thorner, M. O., & Copinschi, G. (1993) · American Journal of Physiology-Endocrinology and Metabolism · doi:10.1152/ajpendo.1993.264.4.e594 · Cited by 145 · see citing works
Self-citationGronfier, C., Luthringer, R., FOLLENIUS, M., Schaltenbrand, N., Macher, J. P., Muzet, A. G., & BRANDENBERGER, G. (1996) · SLEEP · doi:10.1093/sleep/19.10.817 · Cited by 142 · see citing works
Obál, F., Payne, L., Kapás, L., Opp, M. R., & Krueger, J. M. (1991) · Brain Research · doi:10.1016/0006-8993(91)90128-i · Cited by 111 · see citing works
Processes Underlying Sleep Regulation
Borbély, A. A. (1998) · Hormone Research in Paediatrics · doi:10.1159/000023156 · Cited by 104 · see citing works
Effects of systemic GHRH on sleep in intact and hypophysectomized rats
Obál, F., Floyd, R., Kapás, L., Bodosi, B., & Krueger, J. M. (1996) · American Journal of Physiology-Endocrinology and Metabolism · doi:10.1152/ajpendo.1996.270.2.e230 · Cited by 94 · see citing works
Historical Change in the Report of Daytime Fatigue
Bliwise, D. L. (1996) · SLEEP · doi:10.1093/sleep/19.6.462 · Cited by 91 · see citing works
Obál, F., Payne, L., Opp, M. R., Alföldi, P., Kapás, L., & Krueger, J. M. (1992) · American Journal of Physiology-Regulatory, Integrative and Comparative Physiology · doi:10.1152/ajpregu.1992.263.5.r1078 · Cited by 86 · see citing works
Marshall, L., Mölle, M., Böschen, G., Steiger, A., Fehm, H. L., & Jan Born, A. (1996) · The Journal of Clinical Endocrinology & Metabolism · doi:10.1210/jcem.81.3.8772566 · Cited by 77 · see citing works
Quantitative Methods for the Analysis of Circadian and Episodic Hormone Fluctuations
Cauter, E. V. (1981) · Springer eBooks · doi:10.1007/978-94-009-8282-6_1 · Cited by 70 · see citing works
Lanzi, R., & Tannenbaum, G. S. (1992) · Endocrinology · doi:10.1210/endo.130.2.1346379 · Cited by 62 · see citing works
Negative Feedback Suppression of Sleep-Related Growth Hormone Secretion*
Mendelson, W. B., JACOBS, L. S., & Gillin, J. C. (1983) · The Journal of Clinical Endocrinology & Metabolism · doi:10.1210/jcem-56-3-486 · Cited by 60 · see citing works
Jaffe, C. A., Turgeon, D. K., Friberg, R. D., Watkins, P. B., & Barkan, A. L. (1995) · The Journal of Clinical Endocrinology & Metabolism · doi:10.1210/jcem.80.11.7593445 · Cited by 59 · see citing works
Ocampo-Lim, B., Guo, W., DeMott-Friberg, R., et al. (1996) · The Journal of Clinical Endocrinology & Metabolism · doi:10.1210/jcem.81.12.8954048 · Cited by 58 · see citing works
Growth Hormone Secretion in Night Workers
Weibel, L., FOLLENIUS, M., Spiegel, K., Gronfier, C., & BRANDENBERGER, G. (1997) · Chronobiology International · doi:10.3109/07420529709040541 · Cited by 56 · see citing works
Self-citationDisappearance Rate of Endogenous and Exogenous Human Growth Hormone in Man
Refetoff, S., & Sönksen, P. H. (1970) · The Journal of Clinical Endocrinology & Metabolism · doi:10.1210/jcem-30-3-386 · Cited by 54 · see citing works
Wagner, C., Caplan, S. R., & Tannenbaum, G. S. (1998) · American Journal of Physiology-Endocrinology and Metabolism · doi:10.1152/ajpendo.1998.275.6.e1046 · Cited by 53 · see citing works
Age-Dependent Suppression of Nocturnal Growth Hormone Levels during Sleep Deprivation
Mullington, J. M., Hermann, D. M., Holsboer, F., & Pollmächer, T. (2008) · Neuroendocrinology · doi:10.1159/000127122 · Cited by 50 · see citing works
Sleep EEG recordings in depressive disorders
Kerkhofs, M., Hoffmann, G., de Maertelaere, V., Linkowski, P., & Mendlewicz, J. (1985) · Journal of Affective Disorders · doi:10.1016/0165-0327(85)90009-6 · Cited by 47 · see citing works
Antiserum to Growth Hormone Decreases Sleep in the Rat
Obál, F., Bodosi, B., Szilágyi, A., Kacsoh, B. Z., & Krueger, J. M. (2008) · Neuroendocrinology · doi:10.1159/000127213 · Cited by 41 · see citing works
Seifritz, E., Hemmeter, U., Trachsel, L., Lauer, C. J., Hatzinger, M., Emrich, H. M., Holsboer, F., & Holsboer-Trachsler, E. (1995) · Psychopharmacology · doi:10.1007/bf02245817 · Cited by 38 · see citing works
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Banks, S., & Dinges, D. F. (2007) · Journal of Clinical Sleep Medicine · doi:10.5664/jcsm.26918 · Cited by 1,505 · see citing works
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Czeisler, C. A., & Gooley, J. J. (2007) · Cold Spring Harbor Symposia on Quantitative Biology · doi:10.1101/sqb.2007.72.064 · Cited by 425 · see citing works
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Vorona, R. D., Winn, M. P., Babineau, T. W., Eng, B. P., Feldman, H. R., & Ware, J. C. (2005) · Archives of Internal Medicine · doi:10.1001/archinte.165.1.25 · Cited by 405 · see citing works
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Krueger, J. M. (2003) · Frontiers in Bioscience · doi:10.2741/1033 · Cited by 329 · see citing works
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“We found that the nocturnal GH secretory pattern became biphasic during sleep restriction, relative to normal sleep, resulting in extended GH secretion, as previously reported [15].”
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- Authors
- Spiegel, K., Leproult, R., Colecchia, E. F., L'Hermite-Balériaux, M., Nie, Z., Copinschi, G., & Van Cauter, E.
- Affiliations
- Université Libre de Bruxelles (BE)
- University of Chicago (US)
- Center for Biological Rhythms and Laboratory of Experimental Medicine, Université Libre de Bruxelles, B-1070 Brussels, Belgium
- Department of Medicine, University of Chicago, Chicago, Illinois 60637; and
- Venue
- American Journal of Physiology-Regulatory, Integrative and Comparative Physiology
- Publisher
- American Physiological Society
- Published
- 2000-09-01
- Volume
- 279
- Issue
- 3
- Pages
- R874-R883
- ISSN
- 0363-6119 (ISSN-L)
- 1522-1490
- OpenAlex
- W1864579685
- Cited by
- 183
- References
- 39
- Citations by year
- 2026: 2 · 2025: 7 · 2024: 4 · 2023: 5 · 2022: 5 · 2021: 4 · 2020: 5 · 2019: 9 · 2018: 6 · 2017: 8 · 2016: 5 · 2015: 9 · 2014: 6 · 2013: 9 · 2012: 12
- FWCI
- 2.08
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- American Journal of Physiology-Regulatory, Integrative and Comparative Physiology (publishedVersion)
- PubMed (publishedVersion)
- Funders
- National Institute of Diabetes and Digestive and Kidney Diseases (DK-41814, R01DK041814)
- National Center for Research Resources (M01RR000055, MO1 RR-00055)
- Topics
- Life Sciences › Neuroscience › Cognitive Neuroscience › Sleep and Wakefulness Research
- Health Sciences › Medicine › Endocrinology, Diabetes and Metabolism › Growth Hormone and Insulin-like Growth Factors
- Social Sciences › Psychology › Experimental and Cognitive Psychology › Sleep and Work-Related Fatigue
- Keywords
- growth hormone secretion, sleep debt, sleep restriction, slow-wave sleep, slow-wave activity, circadian rhythm, growth hormone-releasing hormone
- MeSH terms
- Adaptation, Physiological, Adult, Circadian Rhythm, Electroencephalography, Humans, Male, Sleep, Sleep Deprivation, Linear Models, Human Growth Hormone, Sleep Disorders, Circadian Rhythm
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