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Comparative Expression of Proteins in Left and Right Atrial Appendages From Patients With Mitral Valve Disease at Sinus Rhythm and Atrial Fibrillation
Author(s) -
MODREGO JAVIER,
MAROTO LUIS,
TAMARGO JUAN,
AZCONA LUIS,
MATEOSCÁCERES PETRA,
SEGURA ANTONIO,
MORENOHERRERO ROSARIO,
PÉREZCASTELLANOS NICASIO,
DELPÓN EVA,
PÉREZVILLACASTÍN JULIÁN,
RODRÍGUEZ ENRIQUE,
MACAYA CARLOS,
LÓPEZFARRÉ ANTONIO J.
Publication year - 2010
Publication title -
journal of cardiovascular electrophysiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.193
H-Index - 138
eISSN - 1540-8167
pISSN - 1045-3873
DOI - 10.1111/j.1540-8167.2010.01718.x
Subject(s) - atrial fibrillation , medicine , sinus rhythm , cardiology , heat shock protein , appendage , atrial appendage , myosin , mitral valve , actin cytoskeleton , actin , cytoskeleton , anatomy , microbiology and biotechnology , biology , biochemistry , gene , cell
Proteomics and Atrial Appendages. Introduction: The objective was to compare by proteomics the expression of proteins associated with the cytoskeleton, energetic metabolism, and cardiac cytoprotection between left atrial appendages (LAA) and right atrial appendages (RAA) obtained from patients with mitral valve disease both in sinus rhythm (SR, n = 6) and in permanent atrial fibrillation (AF, n = 11).Methods and Results:Samples from RAA and LAA were obtained from the same patient. Proteins were separated in 2‐dimensional electrophoresis and identified by mass spectrometry. LAA from SR patients upexpressed α‐actin isotype 1 and desmin isotypes 3 and 5 with respect to RAA. In LAA from AF patients were upexpressed cardiac α‐actin isotypes 1 and 2, tropomyosin α‐ and β‐chains, and myosin light chain embryonic muscle/atrial isoform with respect to LAA from SR patients. In RAA from AF patients also upexpressed different cytoskeleton associated proteins with respect to RAA from SR patients. Different energetic metabolism‐associated proteins were upexpressed in LAA and RAA from AF with respect those from SR patients. In AF patients, the expression of proteins associated with cardiac cytoprotection such as gluthatione‐S‐transferase, heat shock protein (Hsp) 27, and different Hsp60 isotypes, were higher in RAA but not in LAA with respect to the corresponding appendages in SR patients.Conclusions:For each individual patient RAA and LAA showed a similar level of proteins expressed associated with cytoskeleton, energetic metabolism, and cardiac cytoprotection. There were more differences in the level of proteins associated with the above‐mentioned mechanisms between the atrial appendages from AF with respect to SR patients, which may open new targets for drugs. (J Cardiovasc Electrophysiol, Vol. 21, pp. 859‐868, August 2010)