Document Detail

Restoration of corticosteroid periodicity in obese rats by limited a.m. food access.
MedLine Citation:
PMID:  466438     Owner:  NLM     Status:  MEDLINE    
Absence of circadian periodicity of plasma corticosteroid levels has previously been reported to occur in animals maintained under constant light and in animals with suprachiasmatic nuclear lesions. Such animals also exhibit aperiodic rather than normal nocturnal eating. Restricted a.m. access to food (09.30--11.30 h) in such animals results in appearance of circadian corticosteroid periodicity (peak at 08.00 h) similar to that seen in normal animals on a similar food restriction regimen. The present study investigated the nature of adrenal circadian periodicity in obese rats who are reported to exhibit aperiodic feeding. Such aperiodic feeding occurred in obese male, but not in obese female, animals. These obese male animals manifested absent corticosteroid circadian periodicity. Restricted a.m. access to food was associated with the appearance of such periodicity similar to that described above in the two other experimental situations. These studies indicate differences in eating behavior and corticosteroid periodicity between obese male and obese female rats. They provide additional confirmation, in animals under normal light--dark conditions and in the absence of CNS lesions, of the role of periodic feeding in the generation of adrenal circadian periodicity.
D T Krieger
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Publication Detail:
Type:  Journal Article; Research Support, U.S. Gov't, P.H.S.    
Journal Detail:
Title:  Brain research     Volume:  171     ISSN:  0006-8993     ISO Abbreviation:  Brain Res.     Publication Date:  1979 Jul 
Date Detail:
Created Date:  1979-10-17     Completed Date:  1979-10-17     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0045503     Medline TA:  Brain Res     Country:  NETHERLANDS    
Other Details:
Languages:  eng     Pagination:  67-75     Citation Subset:  IM    
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MeSH Terms
Adrenal Cortex Hormones / blood*
Body Temperature Regulation
Body Weight*
Circadian Rhythm*
Food Deprivation
Sex Factors
Reg. No./Substance:
0/Adrenal Cortex Hormones

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