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High-resolution two-dimensional gel electrophoresis analysis of atrial tissue proteome reveals down-regulation of fibulin-1 in atrial fibrillation.

Abstract：

BACKGROUND:Atrial fibrillation (AF) is the most common cardiac arrhythmia found in clinical practice. We combined high-resolution two-dimensional gel electrophoresis (2-DE) and mass spectrometry (MS) to compare the atrial proteome of subjects with AF versus controls with sinus rhythm (SR). Our aim was to identify novel differentially regulated proteins that could be related to the development of the arrhythmia. METHODS:Human atrial appendage tissue samples from patients undergoing heart surgery with AF or SR were analyzed by high-resolution 2-DE. Proteins of interest were identified by MS and validated by western blotting and inmunohistochemistry. RESULTS:Our analysis allowed the detection of over 2300 protein spots per gel. Following differential image analysis, we found 22 spot differences between the AF and SR groups in the 4-7 isoelectric point range, leading to the identification of 15 differentially regulated proteins. The main group of proteins identified was that of heat shock proteins (HSPs), including TRAP-1, HspB3, HspΒ6 and AHA1. Some of the differences detected between AF and SR for the above proteins were due to post-translational modifications. In addition, we identified the structural protein fibulin-1 as down-regulated in atrial tissue from AF patients. CONCLUSIONS:High-resolution 2-DE analysis of human atrial tissue revealed that AF is associated with changes in structural proteins and an important number of HSPs. The lower expression of the structural protein fibulin-1 in atrial tissue from AF patients might reflect the myocardial structural changes that take place in the arrhythmia.

journal_name

Int J Cardiol

journal_title

International journal of cardiology

authors

García A,Eiras S,Parguiña AF,Alonso J,Rosa I,Salgado-Somoza A,Rico TY,Teijeira-Fernández E,González-Juanatey JR

doi

10.1016/j.ijcard.2010.04.036

subject

Has Abstract

pub_date

2011-08-04 00:00:00

pages

283-90

issue

3

eissn

0167-5273

issn

1874-1754

pii

S0167-5273(10)00252-4

journal_volume

150

pub_type

杂志文章

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