Journal
ENDOCRINOLOGY AND METABOLISM
Volume 28, Issue 4, Pages 288-296Publisher
KOREAN ENDOCRINE SOC
DOI: 10.3803/EnM.2013.28.4.288
Keywords
Restraint stress; Body weight; Eating; Hypothalamus; Microarray
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Funding
- Korea Science and Engineering Foundation (KOSEF) [R01-2006-000-10259-0]
- Basic Science Research Program through the National Research Foundation (NRF) of Korea - Ministry of Education, Science and Technology [R13-2005-012-02001-0]
- National Research Foundation of Korea [R13-2005-012-02001-0, R01-2006-000-10259-0] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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Background: Stress affects body weight and food intake, but the underlying mechanisms are not well understood. Methods: We evaluated the changes in body weight and food intake of ICR male mice subjected to daily 2 hours restraint stress for 15 days. Hypothalamic gene expression profiling was analyzed by cDNA microarray. Results: Daily body weight and food intake measurements revealed that both parameters decreased rapidly after initiating daily restraint stress. Body weights of stressed mice then remained significantly lower than the control body weights, even though food intake slowly recovered to 90% of the control intake at the end of the experiment. cDNA microarray analysis revealed that chronic restraint stress affects the expression of hypothalamic genes possibly related to body weight control. Since decreases of daily food intake and body weight were remarkable in days 1 to 4 of restraint, we examined the expression of food intake-related genes in the hypothalamus. During these periods, the expressions of ghrelin and pro-opiomelanocortin mRNA were significantly changed in mice undergoing restraint stress. Moreover, daily serum corticosterone levels gradually increased, while leptin levels significantly decreased. Conclusion: The present study demonstrates that restraint stress affects body weight and food intake by initially modifying canonical food intake-related genes and then later modifying other genes involved in energy metabolism. These genetic changes appear to be mediated, at least in part, by corticosterone.
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