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Related Concept Videos

Management of Insomnia01:19

Management of Insomnia

The sleep cycle, an integral part of human health, consists of several stages with distinct characteristics and functions. It begins with a transition from wakefulness to sleep, known as the light sleep phase, followed by the restorative deep sleep phase, essential for physical recovery and growth. The cycle concludes with the Rapid Eye Movement (REM) phase, characterized by high brain activity and vivid dreaming. Insomnia, a prevalent sleep disorder, involves difficulty falling asleep, staying...
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Melatonin congeners like ramelteon (Rozerem) and tasimelteon (Hetlioz) selectively bind to melatonin receptors (MT1 and MT2) and thus mimic the actions of melatonin, a hormone that regulates sleep-wake cycles. Tasimelteon is primarily used for non-24-hour sleep-wake disorder, common in blind patients. They are also used to treat conditions like insomnia...
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The Pineal Gland01:02

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Circadian Rhythms and Gene Regulation

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Related Experiment Video

Updated: May 9, 2026

Collecting Sleep, Circadian, Fatigue, and Performance Data in Complex Operational Environments
08:36

Collecting Sleep, Circadian, Fatigue, and Performance Data in Complex Operational Environments

Published on: August 8, 2019

Manipulating melatonin in managing mood.

P Boyce1, M Hopwood

  • 1Westmead Clinical School, Sydney Medical School, The University of Sydney, Sydney, NSW, Australia. philip.boyce@sydney.edu.au

Acta Psychiatrica Scandinavica. Supplementum
|August 6, 2013
PubMed
Summary
This summary is machine-generated.

Disruptions in circadian rhythms are linked to depression. Treatments like light therapy, sleep deprivation, and melatonin receptor agonists show antidepressant effects, offering new therapeutic strategies.

Keywords:
affective disorderbright lightcircadian rhythmmelatoninsleep deprivation

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Area of Science:

  • Chronobiology
  • Neuroscience
  • Psychiatry

Background:

  • Circadian rhythm disturbances are associated with major depression.
  • Melatonin secretion, a marker of circadian rhythms, can be manipulated to potentially treat depression.

Purpose of the Study:

  • To review studies on the antidepressant effects of exogenous melatonin, light therapy, sleep deprivation, and melatonin receptor agonists.
  • To explore the potential of resynchronizing circadian rhythms as a novel depression treatment.

Main Methods:

  • Selective review of existing research.
  • Analysis of studies investigating exogenous melatonin, light therapy, sleep deprivation, and melatonin receptor agonists for antidepressant effects.

Main Results:

  • Bright light therapy demonstrates antidepressant effects, particularly for seasonal affective disorder.
  • Sleep deprivation shows a time-limited antidepressant effect.
  • Agomelatine, a novel antidepressant, exhibits MT1/MT2 receptor agonism and 5HT2c receptor antagonism.
  • The direct antidepressant role of melatonin requires further demonstration.

Conclusions:

  • Modulating circadian melatonin secretion through reviewed strategies presents a promising new avenue for depression treatment.