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Physiological growth hormone secretion during slow-wave sleep in short prepubertal children

P Adlard1, F Buzi, J Jones

  • 1Department of Growth and Development, Institute of Child Health, London, UK.

Clinical Endocrinology
|September 1, 1987
PubMed

Insights

Assessing growth hormone (GH) secretion requires complete overnight profiles. Limited nocturnal GH sampling is insufficient for accurately evaluating physiological GH secretion in short children.

Area of Science:

  • Pediatric Endocrinology
  • Sleep Medicine
  • Growth Hormone Physiology

Background:

  • Accurate assessment of physiological growth hormone (GH) secretion is crucial for diagnosing growth disorders in children.
  • Limited nocturnal GH profiling has been proposed as a potentially simpler method for GH assessment.

Purpose of the Study:

  • To evaluate the utility of limited nocturnal GH profiling for assessing physiological GH secretion in short prepubertal children.
  • To determine if specific sleep stages or early sleep periods correlate with overall GH secretion patterns.

Main Methods:

  • Analysis of complete overnight GH and sleep profiles in 20 short prepubertal children (mean age 9.1 years).
  • GH levels were sampled at 15-min intervals throughout the night.
  • Correlation analysis between maximal GH values during specific sleep stages/times and overall GH secretion parameters (peak sum, AUC) and height velocity SDS.

Main Results:

  • Maximal GH values occurred across various sleep stages, with only 55% during the first slow-wave sleep period and 65% within the first 2 hours of sleep.
  • Maximal GH during the first slow-wave sleep showed weak correlations with total nocturnal GH peaks and total GH area under the curve.
  • No assessed limited profile parameters correlated with height velocity standard deviation score (SDS).

Conclusions:

  • Complete overnight or 24-hour GH profiles remain essential for accurately assessing physiological GH secretion.
  • Limited nocturnal GH sampling methods are currently inadequate substitutes for comprehensive GH evaluation.
  • The clinical significance of observed variations in GH secretion patterns during sleep requires further investigation.

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