Publication Date:
1980-12-19
Description:
The melatonin content measured by radioimmunoassay of the pineal gland over a 24-hour period (a light:dark cycle of 14 hours of light and 10 of darkness) was compared in young and old female and male Syrian hamsters. The young animals of both sexes exhibited roughly an eightfold rise in pineal melatonin during the dark phase of the cycle, whereas in the old hamsters the nocturnal rise in melatonin was almost completely absent. The results indicate a marked drop in pineal biosynthetic activity in the aging hamster.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Reiter, R J -- Richardson, B A -- Johnson, L Y -- Ferguson, B N -- Dinh, D T -- New York, N.Y. -- Science. 1980 Dec 19;210(4476):1372-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7434032" target="_blank"〉PubMed〈/a〉
Keywords:
*Aging
;
Animals
;
Circadian Rhythm
;
Cricetinae
;
Melatonin/*metabolism
;
Mesocricetus
;
Pineal Gland/*physiology
;
Sex Factors
Print ISSN:
0036-8075
Electronic ISSN:
1095-9203
Topics:
Biology
,
Chemistry and Pharmacology
,
Computer Science
,
Medicine
,
Natural Sciences in General
,
Physics
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