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Gene expression profiling of human atrial myocardium with atrial fibrillation by DNA microarray analysis.

Abstract：

BACKGROUND:Atrial fibrillation (AF) is the most frequently encountered arrhythmia in the clinical setting. However, a comprehensive investigation of the molecular mechanism of AF has not been performed. The aim of this study was to clarify transcriptional profiling of genes modulated in the atrium of AF patients using DNA microarray technology. METHODS:We obtained 17 fresh cardiac specimens, right atrial appendages, isolated from 10 patients with normal sinus rhythm and seven chronic AF patients who underwent cardiac surgery. Affymetrix GeneChip (Human Genome U95A) investigating 12,000 human genes was used for each specimen. Quantitative analysis of selected genes was performed by the real-time PCR method. RESULTS:The left atrial diameter in the AF group was greater than that in the sinus rhythm group. We could identify 33 AF-specific genes that were significantly activated (>1.5-fold), compared with the sinus rhythm group, including an ion channel, an antioxidant, an inflammation, three cell growth/cell cycle, three transcription such as nuclear factor-interleukin 6-beta, several cell signaling and several protein genes, and seven expressed sequence tags (ESTs). In contrast, we found 63 sinus rhythm-specific genes, including several cell signaling/communication such as sarcoplasmic reticulum Ca2+-ATPase 2, several cellular respiration and energy production and two antiproliferative or negative regulator of cell growth genes, and 22 ESTs. CONCLUSIONS:The present study demonstrated that about one hundred genes were modulated in the atria of AF patients. These findings suggest that these genes may play critical roles in the initiation or perpetuation of AF and the pathophysiology of atrial remodeling.

journal_name

Int J Cardiol

journal_title

International journal of cardiology

authors

Ohki R,Yamamoto K,Ueno S,Mano H,Misawa Y,Fuse K,Ikeda U,Shimada K

doi

10.1016/j.ijcard.2004.05.026

subject

Has Abstract

pub_date

2005-07-10 00:00:00

pages

233-8

issue

2

eissn

0167-5273

issn

1874-1754

pii

S0167-5273(04)00488-7

journal_volume

102

pub_type

杂志文章

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