Document Detail


Melatonin: a chronobiotic with anti-aging properties?
MedLine Citation:
PMID:  1865836     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Recently, it has been reported that melatonin administration extends the lifespan of mice, a finding which supports previous research on the effects of pinealectomy and pineal extract administration. The prolongation of lifespan by melatonin has been interpreted in favour of an upregulation of the immune system as well as due to anti-stress properties of melatonin acting via the brain opioid system. In this paper we offer an alternative explanation of melatonin's anti-aging effect: the circadian pacemaker system has a diminished amplitude with age as indexed by a decrease in circulating melatonin levels. Stability of the circadian system correlates with its amplitude and loss of circadian amplitude produces lability which, in turn, leads to internal temporal disorder. Internal temporal disorder may be a precursor of disease states. Exogenous melatonin increases the amplitude of the circadian pacemaker system by feedback onto that system. The hypothalamic suprachiasmatic nuclei are thought to be the mammalian biological clock in the brain and have high concentrations of melatonin receptors. Therefore, melatonin administration in pharmacological doses may prevent aging symptoms by acting at the level of the circadian pacemaker's amplitude.
Authors:
S M Armstrong; J R Redman
Related Documents :
10677016 - Exogenous melatonin reduces the resynchronization time after phase shifts of a nonphoti...
24672376 - A robust h.264/avc video watermarking scheme with drift compensation.
20524796 - Importance of light in temporal organization of photoreceptor proteins and melatonin-pr...
11379666 - Hypersensitivity of melatonin suppression in response to light in patients with delayed...
482306 - Delta 9-tetrahydrocannabinol: elevation of absolute visual thresholds of rabbits.
16015326 - Regional insolation forcing of late quaternary climate change in the southern hemisphere.
Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Medical hypotheses     Volume:  34     ISSN:  0306-9877     ISO Abbreviation:  Med. Hypotheses     Publication Date:  1991 Apr 
Date Detail:
Created Date:  1991-09-12     Completed Date:  1991-09-12     Revised Date:  2008-08-15    
Medline Journal Info:
Nlm Unique ID:  7505668     Medline TA:  Med Hypotheses     Country:  ENGLAND    
Other Details:
Languages:  eng     Pagination:  300-9     Citation Subset:  IM    
Affiliation:
Psychology Department, La Trobe University, Bundoora, Victoria, Australia.
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Descriptor/Qualifier:
Aging / physiology*
Animals
Circadian Rhythm / physiology*
Cricetinae
Diptera
Feedback
Female
Humans
Immune System / physiology
Male
Melatonin / physiology*
Mice
Models, Biological
Mood Disorders / physiopathology
Motor Activity / physiology
Pineal Gland / physiology
Rats
Suprachiasmatic Nucleus / physiology
Chemical
Reg. No./Substance:
73-31-4/Melatonin

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


Previous Document:  Everyday diagnostics--a critique of the Bayesian model.
Next Document:  Dissipative structure and the mind-body problem.