Document Detail


Mechanism of [Ca(2+)](i) rise induced by angiotensin 1-7 in MDCK renal tubular cells.
MedLine Citation:
PMID:  23137179     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
The effect of angiotensin 1-7 (Ang 1-7) on cytosolic Ca(2+) concentrations ([Ca(2+)](i)) in MDCK renal tubular cells was explored. The Ca(2+)-sensitive fluorescent dye fura-2 was applied to measure [Ca(2+)](i). Ang 1-7 at concentrations of 10-50 µM induced a [Ca(2+)](i) rise in a concentration-dependent manner. The response was reduced partly by removing Ca(2+). Ang 1-7 evoked store operated Ca(2+) entry that was inhibited by La(3+) and aristolochic acid. In the absence of extracellular Ca(2+), incubation with the endoplasmic reticulum Ca(2+) pump inhibitor thapsigargin prevented Ang 1-7 from releasing more Ca(2+). Inhibition of phospholipase C with U73122 abolished Ang 1-7-induced [Ca(2+)](i) rise. Ang 1-7-induced [Ca(2+)](i) rise was abolished by the angiotensin type 1 receptor antagonist losartan, but was not affected by the angiotensin type 2 receptor antagonist PD 123,319. In sum, in MDCK cells, Ang 1-7 stimulated angiotensin type 1 receptors leading to a [Ca(2+)](i) rise that was composed of phospholipase C-dependent Ca(2+) release from the endoplasmic reticulum and Ca(2+) entry via phospholipase A2-sensitive store-operated Ca(2+) channels.
Authors:
Chung-Pin Liu; Chiang-Ting Chou; Chao-Chuan Chi; Ko-Long Lin; He-Hsiung Cheng; Yi-Chau Lu; Jin-Shiung Cheng; Chun-Chi Kuo; Wei-Zhe Liang; I-Fei Huang; Chung-Ren Jan
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-11-9
Journal Detail:
Title:  Journal of receptor and signal transduction research     Volume:  -     ISSN:  1532-4281     ISO Abbreviation:  J. Recept. Signal Transduct. Res.     Publication Date:  2012 Nov 
Date Detail:
Created Date:  2012-11-9     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9509432     Medline TA:  J Recept Signal Transduct Res     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Affiliation:
Department of Internal Medicine, Yuan's General Hospital , Kaohsiung , Taiwan.
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