Document Detail


Stimulatory effect of dexamethasone on angiotensin-converting enzyme in neonatal rat cardiac myocytes.
MedLine Citation:
PMID:  10829094     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Angiotensin-converting enzyme (ACE) plays a central role in cardiac remodeling associated with pathological conditions such as myocardial infarction. The existence of different cell types in the heart expressing components of the renin-angiotensin system makes it difficult to evaluate their relative role under physiological and pathological conditions. Since myocytes are the predominant cellular constituent of the heart by mass, in the present study we studied the effects of glucocorticoids on ACE activity using well-defined cultures of neonatal rat cardiac myocytes. Under steady-state conditions, ACE activity was present at very low levels, but after dexamethasone treatment ACE activity increased significantly (100 nmol/l after 24 h) in a time-dependent fashion. These results demonstrate the influence of dexamethasone on ACE activity in rat cardiac myocytes. This is consistent with the idea that ACE activation occurs under stress conditions, such as myocardial infarction, in which glucocorticoid levels may increase approximately 50-fold.
Authors:
M L Barreto-Chaves; A Heimann; J E Krieger
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't; Review    
Journal Detail:
Title:  Brazilian journal of medical and biological research = Revista brasileira de pesquisas médicas e biológicas / Sociedade Brasileira de Biofísica ... [et al.]     Volume:  33     ISSN:  0100-879X     ISO Abbreviation:  Braz. J. Med. Biol. Res.     Publication Date:  2000 Jun 
Date Detail:
Created Date:  2000-08-28     Completed Date:  2000-08-28     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  8112917     Medline TA:  Braz J Med Biol Res     Country:  BRAZIL    
Other Details:
Languages:  eng     Pagination:  661-4     Citation Subset:  IM    
Affiliation:
Laboratório de Genética e Cardiologia Molecular, Instituto do Coração, Faculdade de Medicina, Universidade de São Paulo, Brasil.
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MeSH Terms
Descriptor/Qualifier:
Animals
Dexamethasone / pharmacology*
Glucocorticoids / pharmacology*
Heart / drug effects
Microscopy, Fluorescence
Myocardium / cytology*
Peptidyl-Dipeptidase A / metabolism*
Rats
Rats, Wistar
Chemical
Reg. No./Substance:
0/Glucocorticoids; 50-02-2/Dexamethasone; EC 3.4.15.1/Peptidyl-Dipeptidase A

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


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