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Diurnal melatonin patterns in children: ready to apply in clinical practice?

Rūta Praninskienė1, Irena Dumalakienė, Robertas Kemežys

  • 1Department of Pediatric Neurology, Vilnius University Children's Hospital, Vilnius, Lithuania.

Pediatric Neurology
|January 24, 2012
PubMed

Insights

Melatonin is crucial for pediatric sleep regulation, but its high variability in children challenges clinical use. Further research is needed to establish criteria for diagnosing melatonin system issues and initiating treatment.

Area of Science:

  • Pediatric Endocrinology
  • Sleep Medicine
  • Chronobiology

Background:

  • Endogenous melatonin is vital for pediatric sleep regulation.
  • Exogenous melatonin is used to treat sleep disturbances in children.
  • Clinical practice requires optimized melatonin measurement and interpretation.

Purpose of the Study:

  • To investigate diurnal patterns of salivary melatonin and urinary 6-sulfatoxymelatonin in children and adolescents.
  • To examine relationships between melatonin parameters, anthropometrics, age, and sleep scores.
  • To assess the clinical utility of melatonin measurements in pediatric populations.

Main Methods:

  • Measured salivary melatonin and urinary 6-sulfatoxymelatonin every 3 hours in 29 children/adolescents (5.5-17.3 years).
  • Analyzed diurnal profiles, peak concentrations, and area under the curve.
  • Correlated melatonin parameters with anthropometric measures, age, and Sleep Disturbance Scale for Children scores.

Main Results:

  • High interindividual variability observed in melatonin diurnal profiles.
  • Melatonin production (weight-adjusted) decreased with age and sexual maturation (P < 0.00).
  • Both salivary melatonin and 6-sulfatoxymelatonin are viable measures of the pediatric melatonin system.

Conclusions:

  • High interindividual variability in diurnal melatonin concentrations complicates clinical diagnosis and treatment initiation.
  • Further research is necessary to develop criteria for evaluating the pediatric melatonin system.
  • Standardized criteria are needed for initiating exogenous melatonin therapy in children.

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