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Crosstalk Between Aging, Circadian Rhythm, and Melatonin.

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Aging disrupts natural body rhythms (circadian rhythms), a process linked to reduced melatonin. Supplementing melatonin may help manage age-related circadian disruption and related disorders.

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Area of Science:

  • Chronobiology
  • Gerontology
  • Neuroendocrinology

Background:

  • Circadian rhythms (CRs), regulated by the suprachiasmatic nucleus (SCN), govern physiological and behavioral cycles.
  • Circadian rhythm disruption (CRD) is a hallmark of aging, exacerbated by declining endogenous melatonin synthesis.
  • Melatonin, crucial for synchronizing CRs, decreases with age, impacting older individuals' health.

Approach:

  • This review examines the molecular circadian clock architecture and its age-related functional decline.
  • It details melatonin's role in regulating the circadian pacemaker and maintaining redox homeostasis during aging.
  • The protective effects of exogenous melatonin supplementation against age-dependent CRD are discussed.

Key Points:

  • Age-related decline in melatonin synthesis impairs circadian rhythm regulation.
  • Melatonin plays a vital role in maintaining redox balance and synchronizing the circadian pacemaker.
  • Exogenous melatonin shows potential as a chronotherapeutic agent for age-related disorders.

Conclusions:

  • Understanding the interplay between circadian rhythms, melatonin, and aging is crucial for developing novel chronotherapies.
  • Melatonin supplementation may offer a viable strategy to mitigate age-dependent CRD and associated health issues.
  • Further research into melatonin's pleiotropic effects can advance treatments for age-related conditions.