Melatonin as a Chronobiotic with Sleep-promoting Properties.
Study Goal
The researchers aimed to systematically review the chronobiotic, sleep-inducing, and overall sleep-promoting properties of exogenous melatonin (exo-MEL) and its pharmacological mechanisms.
Results Summary
The study reviewed the effects of exo-MEL on healthy subjects, circadian rhythm sleep disorders, and primary insomnia, focusing on timing and dosage. The findings suggest variability in exo-MEL's sleep-promoting effects, interpreted in the context of endogenous melatonin's physiological properties.
Population
Healthy subjects, individuals with circadian rhythm sleep disorders, and those with primary insomnia.
Effective Dosage
Not specified
Duration
Not specified
Interactions
None mentioned
| Intervention | Direction | Endpoint | Population | Dosage | Impact | Claim # |
|---|---|---|---|---|---|---|
exogenous melatonin (exo-MEL) | no change | sleep-promoting properties | - | no significant change | lack of consistency of its described effects | #1 |
exogenous melatonin (exo-MEL) | neutral | sleep-promoting properties | - | - | chronobiotic properties | #2 |
exogenous melatonin (exo-MEL) | neutral | sleep-promoting properties | - | - | sleep-inducing properties | #3 |
exogenous melatonin (exo-MEL) administration | neutral | clinical outcomes | healthy subjects | - | effects | #4 |
exogenous melatonin (exo-MEL) administration | neutral | clinical outcomes | circadian rhythm sleep disorders | - | effects | #5 |
exogenous melatonin (exo-MEL) administration | neutral | clinical outcomes | primary insomnia | - | effects | #6 |
exogenous melatonin (exo-MEL) | neutral | physiological properties and rhythmicity of endogenous melatonin | - | - | pharmacological effects | #7 |
The use of exogenous melatonin (exo-MEL) as a sleep-promoting drug has been under extensive debate due to the lack of consistency of its described effects. In this study, we conduct a systematic and comprehensive review of the literature on the chronobiotic, sleep-inducing, and overall sleep-promoting properties of exo-MEL. To this aim, we first describe the possible pharmacological mechanisms involved in the sleep-promoting properties and then report the corresponding effects of exo-MEL administration on clinical outcomes in: a) healthy subjects, b) circadian rhythm sleep disorders, c) primary insomnia. Timing of administration and doses of exo-MEL received particular attention in this work. The exo-MEL pharmacological effects are hereby interpreted in view of changes in the physiological properties and rhythmicity of endogenous melatonin. Finally, we discuss some translational implications for the personalized use of exo-MEL in the clinical practice.