Document Detail


Serotonin release in the preoptic area and anterior hypothalamus is not involved in thermoregulation during low-intensity exercise in a warm environment.
MedLine Citation:
PMID:  20603183     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The aim of the present study was to assess the response of serotonin (5-hydroxytryptamine; 5-HT) in the preoptic area and anterior hypothalamus (PO/AH) to thermoregulation during exercise in a warm environment. In addition, it was investigated whether a rapid increase in extracellular 5-HT levels in the PO/AH modifies the thermoregulatory response under the same exercise conditions. Rats were made to run for 120 min at 10 m min(-1) on a treadmill at the ambient temperature of 30 degrees C. Body core temperature (T(core)) was monitored using a biotelemetry system, and tail skin temperature (T(tail)) was simultaneously measured as an index of heat loss response. Microdialysis in combination with HPLC was used to measure concentrations of monoamines in the PO/AH. Both T(core) and T(tail) increased during the first 20 min of exercise and remained stable until the end of the exercise period. Low-intensity exercise did not induce any changes in 5-HT release in the PO/AH, although the levels of norepinephrine and dopamine were increased. Moreover, increased extracellular 5-HT by local perfusion of 1 microM citalopram (selective 5-HT reuptake inhibitor; SSRI) in the PO/AH had no effect on the thermoregulatory response during acute low-intensity exercise in a warm environment. These results suggest that enhanced release of only 5-HT in the PO/AH may not intervene thermoregulation during exercise in a warm environment.
Authors:
Satomi Takatsu; Takayuki Ishiwata; Romain Meeusen; Sophie Sarre; Hiroshi Hasegawa
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2010-07-13
Journal Detail:
Title:  Neuroscience letters     Volume:  482     ISSN:  1872-7972     ISO Abbreviation:  Neurosci. Lett.     Publication Date:  2010 Sep 
Date Detail:
Created Date:  2010-08-13     Completed Date:  2010-12-13     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  7600130     Medline TA:  Neurosci Lett     Country:  Ireland    
Other Details:
Languages:  eng     Pagination:  7-11     Citation Subset:  IM    
Copyright Information:
Copyright 2010 Elsevier Ireland Ltd. All rights reserved.
Affiliation:
Graduate School of Faculty of Integrated Arts and Sciences, Hiroshima University 1-7-1 Kagamiyama, Higashihiroshima, Hiroshima 739-8521, Japan.
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MeSH Terms
Descriptor/Qualifier:
Animals
Body Temperature / physiology
Body Temperature Regulation / physiology*
Chromatography, High Pressure Liquid
Dopamine / secretion
Hot Temperature
Hypothalamus, Anterior / metabolism*
Male
Microdialysis
Norepinephrine / secretion
Physical Conditioning, Animal / physiology*
Preoptic Area / metabolism*
Rats
Rats, Wistar
Serotonin / secretion*
Chemical
Reg. No./Substance:
50-67-9/Serotonin; 51-41-2/Norepinephrine

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


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