| Autonomic and behavioural thermoregulation in starved rats. | |
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MedLine Citation:
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PMID: 10896730 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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1. We investigated the mechanism of starvation-induced hypothermia in rats. 2. Threshold core temperatures (Tcor) for tail skin vasodilatation and cold-induced thermogenesis were determined after a 3 day starvation using a chronically implanted intravenous thermode. Food deprivation significantly lowered the threshold Tcor for heat production, but did not affect the heat loss threshold. 3. Thermogenic response to a fall in Tcor below its threshold was enhanced by starvation. 4. Preferred ambient temperatures (Tpref) and Tcor were measured before and during a 3 day starvation in a thermal gradient. The 3 day starvation significantly lowered Tcor only in the light phase of the day. The level of hypothermia was the same throughout the fasting period, while Tpref gradually increased during the 3 days of starvation. 5. When rats were starved at a constant ambient temperature of 25 C (no thermal gradient), their Tcor levels were comparable with those of the rats kept in the thermal gradient. 6. The results suggest that, in rats, hypothermia caused by starvation was not due to a decrement in thermogenic capability, but was due to a decrease in the threshold for the activation of thermogenesis. |
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Authors:
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S Sakurada; O Shido; N Sugimoto; Y Hiratsuka; T Yoda; K Kanosue |
Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: The Journal of physiology Volume: 526 Pt 2 ISSN: 0022-3751 ISO Abbreviation: J. Physiol. (Lond.) Publication Date: 2000 Jul |
Date Detail:
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Created Date: 2000-09-18 Completed Date: 2000-09-18 Revised Date: 2009-11-18 |
Medline Journal Info:
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Nlm Unique ID: 0266262 Medline TA: J Physiol Country: ENGLAND |
Other Details:
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Languages: eng Pagination: 417-24 Citation Subset: IM |
Affiliation:
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Department of Physiology, School of Medicine, Kanazawa University, 13-1 Takara-machi, Kanazawa 920-8640, Japan. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Animals Autonomic Nervous System / physiology*, physiopathology Body Temperature Regulation / physiology* Circadian Rhythm Food Deprivation* Hypothermia / etiology, physiopathology* Male Rats Rats, Wistar Starvation / physiopathology* Temperature |
| Comments/Corrections | |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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