Document Detail


The effects of cortisol on heat shock protein 70 levels in two fish species.
MedLine Citation:
PMID:  11703075     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
We studied the relationship between heat stress (2 h, +12 degrees ) and increased levels of circulating cortisol (50 microg cortisol/g body weight) on heat shock protein 70 (hsp70) levels in liver and gill tissues of rainbow trout (Oncorhynchus mykiss) and tilapia (Oreochromis mossambicus). The administration of cortisol by intraperitoneal injection (no heat stress) did not alter tissue hsp70 levels compared to sham implanted (no heat stress) trout and tilapia. We found elevated levels of cortisol significantly suppressed the heat stress-induced levels of hepatic hsp70 by 34.2% and 31.0%, 3 and 24 h post-heat stress, respectively, compared to sham implanted trout. Additionally, elevated levels of cortisol significantly suppressed the heat stress-induced levels of gill hsp70 by 66.2% in trout (3 h post stress) and 26.7% in tilapia (4 h post stress), compared to sham implanted fish. These results suggest that cortisol may be mediating hsp70 levels in fish tissues following times of physiological stress, and that the neuroendocrine and cellular stress responses may be functionally related in these two different species of fish.
Authors:
N Basu; T Nakano; E G Grau; G K Iwama
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Publication Detail:
Type:  Comparative Study; Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  General and comparative endocrinology     Volume:  124     ISSN:  0016-6480     ISO Abbreviation:  Gen. Comp. Endocrinol.     Publication Date:  2001 Oct 
Date Detail:
Created Date:  2001-11-12     Completed Date:  2002-01-09     Revised Date:  2008-11-21    
Medline Journal Info:
Nlm Unique ID:  0370735     Medline TA:  Gen Comp Endocrinol     Country:  United States    
Other Details:
Languages:  eng     Pagination:  97-105     Citation Subset:  IM    
Copyright Information:
Copyright 2001 Academic Press.
Affiliation:
Faculty of Agricultural Sciences, University of British Columbia, Vancouver, BC, Canada.
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MeSH Terms
Descriptor/Qualifier:
Animals
Gills / drug effects,  metabolism
HSP70 Heat-Shock Proteins / metabolism*
Hot Temperature
Hydrocortisone / blood,  pharmacology*
Liver / drug effects,  metabolism
Oncorhynchus mykiss / metabolism*
Stress, Physiological / metabolism
Tilapia / metabolism*
Chemical
Reg. No./Substance:
0/HSP70 Heat-Shock Proteins; 50-23-7/Hydrocortisone

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


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