High endogenous melatonin levels in critically ill children: A pilot study

Lucia Marseglia, Salvatore Aversa, Ignazio Barberi, Carmelo D. Salpietro, Erika Cusumano, Antonio Speciale, Antonella Saija, Carmelo Romeo, Giuseppe Trimarchi, Russel J. Reiter, Eloisa Gitto

Research output: Contribution to journalArticlepeer-review

39 Scopus citations


Objective: To evaluate the serum melatonin levels in critically ill pediatric patients and to test the effect of light on the melatonin's circadian rhythm. Data on melatonin secretion in critically ill pediatric subjects are lacking. Study design: We investigated the serum melatonin levels of 16 sedated and mechanically ventilated patients in a pediatric intensive care unit. Children (mean age, 5.1 ± 3.1 years) were randomly assigned to a dark-exposed or to a light-exposed group to evaluate the effects of light on serum melatonin concentrations. Blood samples for serum melatonin analysis were collected at 10 p.m., 1 a.m., 3 a.m., 5 a.m., 8 a.m., and 12 p.m. Results: The melatonin circadian rhythm was severely disrupted in critically ill children; light exposure lowered serum melatonin even in a context of highly altered circadian cycle; melatonin peaks were greater for healthy age-matched children. Conclusion: The high melatonin levels in the critically ill children may be a response to counteract the elevated oxidative stress associated with serious diseases. Whether these elevated melatonin levels confer any beneficial effects in pediatric critically ill patients remains unknown.

Original languageEnglish (US)
Pages (from-to)357-360
Number of pages4
JournalJournal of Pediatrics
Issue number2
StatePublished - Feb 2013
Externally publishedYes


  • ICU
  • Intensive care unit
  • PICU
  • Pediatric Risk of Mortality
  • Pediatric intensive care unit
  • ROS
  • Reactive oxygen species

ASJC Scopus subject areas

  • Pediatrics, Perinatology, and Child Health


Dive into the research topics of 'High endogenous melatonin levels in critically ill children: A pilot study'. Together they form a unique fingerprint.

Cite this