Document Detail


Cell swelling, impulse conduction, and cardiac arrhythmias in the failing heart. Opposite effects of angiotensin II and angiotensin (1-7) on cell volume regulation.
MedLine Citation:
PMID:  19484190     Owner:  NLM     Status:  In-Process    
Abstract/OtherAbstract:
The influence of hypotonic solution on cell volume and electrophysiology properties of the failing heart of cardiomyopathic hamsters (TO-2) was investigated. The results showed an increase in cell volume of quiescent isolated ventricular myocytes by 66% within 30 min. Angiotensin (1-7) [Ang (1-7)] (10(-8) M) administered to isotonic solution, elicited a gradual decline in cell volume and a significant decrease of the swelling-activated chloride current (I (Clswell)). The effect of Ang (1-7) on cell volume was inhibited by ouabain (10(-7) M). Angiotensin II (10(-8) M) caused cell swelling and increased I (Clswell). Experiments performed on isolated left ventricles of cardiomyopathic hamsters at an advanced stage of the disease, indicated that hypotonic solution prepared by diluting the normal Krebs solution by 25%, showed a gradual decrease of conduction velocity, generation of early after depolarizations and block of impulse conduction within 10 min. Implications to myocardial ischemia are discussed.
Authors:
Walmor C De Mello
Publication Detail:
Type:  Journal Article; Research Support, N.I.H., Extramural     Date:  2009-05-30
Journal Detail:
Title:  Molecular and cellular biochemistry     Volume:  330     ISSN:  1573-4919     ISO Abbreviation:  Mol. Cell. Biochem.     Publication Date:  2009 Oct 
Date Detail:
Created Date:  2009-12-03     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0364456     Medline TA:  Mol Cell Biochem     Country:  Netherlands    
Other Details:
Languages:  eng     Pagination:  211-7     Citation Subset:  IM    
Affiliation:
Department of Pharmacology, School of Medicine, University of Puerto Rico, Medical Sciences Campus, San Juan, PR, 00936-5067, USA. walmor.de-mello@upr.edu
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MeSH Terms
Descriptor/Qualifier:
Grant Support
ID/Acronym/Agency:
HL-34148/HL/NHLBI NIH HHS

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