Document Detail


Photoperiod and temperature can regulate body mass, serum leptin concentration, and uncoupling protein 1 in Brandt's voles (Lasiopodomys brandtii) and Mongolian gerbils (Meriones unguiculatus).
MedLine Citation:
PMID:  17390288     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Environmental factors play an important role in the seasonal adaptation of body mass and thermogenesis in wild small mammals. In this study, we performed a factorial experiment (temperature x photoperiod) in which Brandt's voles and Mongolian gerbils were acclimated to different photoperiods (long photoperiod, 16L : 8D; short photoperiod, 8L : 16D) and temperatures (warm, 23 degrees C; cold, 5 degrees C) to test the hypothesis that photoperiod, temperature, or both together can trigger seasonal changes in serum leptin level, body mass, thermogenesis, and energy intake. Our data demonstrate that Brandt's voles showed a remarkable decrease in body mass in both the cold and a short photoperiod. However, no significant changes in body mass were found for gerbils exposed to similar conditions. The short photoperiod induced a decrease in serum leptin levels for both voles and gerbils that might contribute to an increase in energy intake. Furthermore, the short photoperiod induced an increase of uncoupling protein 1 (UCP1) content for both voles and gerbils, and cold can further enhance the increase in voles. No interactions between photoperiod and temperature were detected for the two species. Brandt's voles can decrease their body mass through changes in energy intake and expenditure, while Mongolian gerbils can keep body mass relatively stable by balancing energy metabolism under winterlike conditions. Leptin was potentially involved in the regulation of body mass and thermogenic capacity for the two species.
Authors:
Xing-Sheng Li; De-Hua Wang
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2007-02-26
Journal Detail:
Title:  Physiological and biochemical zoology : PBZ     Volume:  80     ISSN:  1522-2152     ISO Abbreviation:  Physiol. Biochem. Zool.     Publication Date:    2007 May-Jun
Date Detail:
Created Date:  2007-03-28     Completed Date:  2007-05-24     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  100883369     Medline TA:  Physiol Biochem Zool     Country:  United States    
Other Details:
Languages:  eng     Pagination:  326-34     Citation Subset:  IM    
Affiliation:
State Key Laboratory of Integrative Management of Pest Insects and Rodents, Institute of Zoology, Chinese Academy of Sciences, Beijing 100080, China.
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MeSH Terms
Descriptor/Qualifier:
Adipose Tissue
Animals
Arvicolinae / blood,  physiology*
Body Weight / physiology*
Energy Metabolism
Feeding Behavior
Gene Expression Regulation
Gerbillinae / blood,  physiology*
Ion Channels / blood,  metabolism*
Leptin / blood*
Mitochondrial Proteins / blood,  metabolism*
Photoperiod*
Temperature*
Time Factors
Chemical
Reg. No./Substance:
0/Ion Channels; 0/Leptin; 0/Mitochondrial Proteins; 0/mitochondrial uncoupling protein

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


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