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Article Detail:

Title:
Melatonin in Autism Spectrum Disorders

Abstract:
Melatonin is an endogenous neurohormone produced predominantly in the pineal gland. Recent studies have implicated abnormalities in melatonin physiology and the circadian rhythm in individuals with autism spectrum disorders (ASD). These physiological abnormalities include lower nighttime melatonin or melatonin metabolite concentrations in ASD compared to controls. These abnormalities in melatonin concentrations may be directly attributed to variations in melatonin pathway physiology as both functional and genetic variations in this pathway have been reported in children with ASD. Four studies have observed a correlation between abnormal melatonin concentrations and the severity of autistic behaviors. Twenty clinical studies have reported improvements in sleep parameters with exogenous melatonin supplementation in ASD, including longer sleep duration, less nighttime awakenings and quicker sleep onset. A recent meta-analysis of five randomized, double-blind, placebo-controlled crossover trials examining exogenous melatonin supplementation in ASD reported significant improvements with large effect sizes in total sleep duration and sleep onset latency compared to both baseline and placebo. Six studies reported that the nighttime administration of exogenous melatonin was associated with better daytime behaviors. Four studies reported improvements with exogenous melatonin supplementation when other sleep medications had previously failed. Adverse effects of melatonin were minimal to none in the twenty treatment studies. These studies indicate that the administration of exogenous melatonin for abnormal sleep parameters in ASD is evidence-based. Further studies examining optimal effective dosing and timing of dosing are warranted.

Journal Title: Current Clinical Pharmacology

Price: $58


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