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Comparison between a physiological and a pharmacological stimulus of growth hormone secretion: response to stage IV
Insights
Assessing growth hormone (GH) secretion in children, sleep sampling during stage IV sleep proved comparable to insulin-induced hypoglycemia tests. This physiological method offers an effective alternative for evaluating GH release.
Area of Science:
- Pediatric Endocrinology
- Sleep Medicine
- Hormone Secretion
Background:
- Accurate assessment of growth hormone (GH) secretion is crucial for diagnosing pediatric growth disorders.
- Conventional methods like insulin-induced hypoglycemia (IIH) are effective but invasive.
Purpose of the Study:
- To compare the efficacy and reliability of assessing peak GH response during stage IV sleep with the standard IIH test in children.
- To evaluate sleep sampling as a physiological alternative for GH secretion assessment.
Main Methods:
- Peak GH response to IIH was compared with peak GH concentration during the first cycle of stage IV sleep in 75 children.
- Electroencephalographic (EEG) monitoring was used to confirm stage IV sleep.
Main Results:
- GH secretion assessment during sleep showed comparable efficiency, sensitivity, and false-negative rates to pharmacological tests.
- Concordant results between sleep sampling and IIH were observed in 65 out of 75 children.
- Sleep sampling was identified as a physiological test with advantages for assessing GH secretion.
Conclusions:
- Sleep sampling under EEG control is a reliable and effective physiological method for assessing GH secretion in children.
- This method offers a less invasive and potentially more naturalistic approach compared to pharmacological stimulation tests.
Abstract:
Peak growth hormone (GH) response to insulin-induced hypoglycaemia was compared with peak GH concentration during the first cycle of stage IV sleep in 75 children. 65 children had concordant results: in 38 GH concentrations were greater than 15 mU/l and in 27 less than this value. Results were discordant in 10 children. Results of sleep sampling under electroencephalographic control of the assessment of GH secretion are comparable to conventional pharmacological studies in terms of efficiency, sensitivity, and percentage false-negatives. Sleep sampling has the advantage of being a physiological test of secretion.