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Differential effects of chronic social stress and fluoxetine on meal patterns in mice.
MedLine Citation:
PMID:  23318656     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
Both chronic stress and antidepressant medications have been associated with changes in body weight. In the current study, we investigate mechanisms by which stress and antidepressant medications interact to affect meal patterns. A group of mice was subjected to the chronic social defeat stress model of major depression followed by fluoxetine treatment and was subsequently analyzed for food intake using metabolic cages. Here, we report that chronic social defeat stress increases food intake by specifically increasing meal size, an effect that is reversed by fluoxetine treatment. In an attempt to gain mechanistic insight into changes in meal patterning induced by stress and fluoxetine, fasting serum samples were collected every four hours over a 24-hour period and acyl-ghrelin, leptin, and corticosterone levels were measured. Chronic stress induces a peak in acyl-ghrelin levels just prior to lights off, which is shifted in mice treated with fluoxetine. Taken together, these results indicate that stress increases food intake by decreasing satiation, and that fluoxetine can reverse stress-induced changes in meal patterns.
Authors:
Jaswinder Kumar; Jen-Chieh Chuang; Elisa S Na; Anna Kuperman; Andrea G Gillman; Shibani Mukherjee; Jeffrey M Zigman; Colleen A McClung; Michael Lutter
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2013-1-11
Journal Detail:
Title:  Appetite     Volume:  -     ISSN:  1095-8304     ISO Abbreviation:  Appetite     Publication Date:  2013 Jan 
Date Detail:
Created Date:  2013-1-15     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8006808     Medline TA:  Appetite     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Copyright Information:
Copyright © 2013. Published by Elsevier Ltd.
Affiliation:
Departments of Psychiatry, Division of Hypothalamic Research, The University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, TX, 75390-9070. Electronic address: jaswinder.kumar@utsouthwestern.edu.
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