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Predicate | Object |
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rdf:type | |
lifeskim:mentions | |
pubmed:issue |
3
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pubmed:dateCreated |
1998-5-1
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pubmed:abstractText |
Annexins are a unique family of membrane-associated, Ca2+ and phospholipid-binding proteins found in various tissues. Among the 12 isoforms, Annexin II, V and VI exist in heart tissue in the highest amounts. Annexin VI has been shown to affect intracellular Ca2+ cycling and contractility in isolated cardiomyocytes. Annexin V is present in both cardiomyocytes and non-myocyte cell types in the heart and may play a role in the regulation of cellular ion fluxes, organization and secretion, while the cardiac effects of annexin II are unclear. To identify changes in annexin II, V and VI isoforms that might occur in human heart failure, we measured mRNA and protein levels of these three annexins in transplanted left ventricular tissue of 12 patients with end-stage congestive heart failure due to coronary artery disease (CAD, n=6) or idiopathic dilated cardiomyopathy (DCM, n=6) who underwent cardiac transplantation. Normal heart tissue (C, n=6) was used as a control. Northern blot analyses showed a significant decrease (61%) in annexin VI mRNA levels in heart failure patients compared with controls (1.08+/-0.16 v 2.79+/-0.20 A.U.C. unit, determined by laser densitometry, mean+/-s.e.). In contrast, we found a 67% increase (2. 32+/-0.27 v 3.88+/-0.29) in annexin II mRNA levels and a two-fold increase (1.00+/-0.24 v 2.21+/-0.29) in annexin V mRNA levels in cardiomyopathic hearts as compared to normal hearts. Western blot analyses demonstrated a corresponding decrease (46.1%) in annexin VI protein levels in the heart failure group as compared to controls (2. 63+/-0.22 v 4.88+/-0.52), while annexin II protein levels showed a significant 40.7% increase in patients with heart failure compared to those in normal hearts (5.08+/-0.67 v 3.61+/-0.32). Annexin V protein levels were also significantly increased (45%) in heart failure patients compared with normal (2.14+/-0.19 v 1.48+/-0.11). No difference in either annexins II, V or VI mRNA and protein levels were found between CAD and DCM patients. We conclude that human end-stage heart failure is associated with a down regulation of annexin VI and up regulation of annexin II and V proteins. Coordinate changes were observed in steady-state mRNA levels. These results suggest that these annexin isoforms may contribute to the regulation of intracellular Ca2+ homeostasis in the cardiomyopathic heart.
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pubmed:grant | |
pubmed:language |
eng
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pubmed:journal | |
pubmed:citationSubset |
IM
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pubmed:chemical |
http://linkedlifedata.com/resource/pubmed/chemical/Annexin A2,
http://linkedlifedata.com/resource/pubmed/chemical/Annexin A5,
http://linkedlifedata.com/resource/pubmed/chemical/Annexin A6,
http://linkedlifedata.com/resource/pubmed/chemical/Annexins,
http://linkedlifedata.com/resource/pubmed/chemical/Calcium,
http://linkedlifedata.com/resource/pubmed/chemical/RNA, Messenger
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pubmed:status |
MEDLINE
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pubmed:month |
Mar
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pubmed:issn |
0022-2828
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pubmed:author | |
pubmed:copyrightInfo |
Copyright 1998 Academic Press Limited
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pubmed:issnType |
Print
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pubmed:volume |
30
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pubmed:owner |
NLM
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pubmed:authorsComplete |
Y
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pubmed:pagination |
443-51
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pubmed:dateRevised |
2010-1-20
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pubmed:meshHeading |
pubmed-meshheading:9515022-Adult,
pubmed-meshheading:9515022-Annexin A2,
pubmed-meshheading:9515022-Annexin A5,
pubmed-meshheading:9515022-Annexin A6,
pubmed-meshheading:9515022-Annexins,
pubmed-meshheading:9515022-Calcium,
pubmed-meshheading:9515022-Case-Control Studies,
pubmed-meshheading:9515022-Down-Regulation,
pubmed-meshheading:9515022-Heart Failure,
pubmed-meshheading:9515022-Heart Ventricles,
pubmed-meshheading:9515022-Homeostasis,
pubmed-meshheading:9515022-Humans,
pubmed-meshheading:9515022-Intracellular Fluid,
pubmed-meshheading:9515022-Male,
pubmed-meshheading:9515022-Middle Aged,
pubmed-meshheading:9515022-Myocardial Contraction,
pubmed-meshheading:9515022-Myocardium,
pubmed-meshheading:9515022-RNA, Messenger,
pubmed-meshheading:9515022-Up-Regulation
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pubmed:year |
1998
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pubmed:articleTitle |
Altered cardiac annexin mRNA and protein levels in the left ventricle of patients with end-stage heart failure.
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pubmed:affiliation |
Division of Cardiology, University of Cincinnati, Cincinnati, OH, USA.
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pubmed:publicationType |
Journal Article,
Research Support, U.S. Gov't, P.H.S.
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