Abstract | BACKGROUND: Abnormal intracellular Ca2+ homeostasis is an important modulator of chronic atrial fibrillation. Sarcolipin, a homologue of phospholamban, is specifically expressed in the atria, and may play an important role in modulating intracellular Ca2+ homeostasis in the atria. The aim of this study was to investigate the expression of sarcolipin mRNA in the atrial myocardium of patients with chronic atrial fibrillation. METHODS: We analyzed the expression of sarcolipin, phospholamban, cardiac calsequestrin and sodium calcium exchanger mRNAs in the right atrial myocardium from nine patients with mitral valvular disease with atrial fibrillation (MVD/AF), nine patients with MVD who had normal sinus rhythm (MVD/NSR), and 10 control patients with normal sinus rhythm who received open heart surgery (controls). The expression of mRNA was measured using the ABI PRISM 7700 Sequence Detection System (Applied Biosystems, Foster City, CA). RESULTS: Relative expression levels of sarcolipin mRNA were significantly lower in MVD/AF (0.60 +/- 0.11) than in either MVD/NSR (1.28 +/- 0.17, P < 0.01) or controls (1.10 +/- 0.10, P < 0.05). The expression levels of sarcolipin mRNA were significantly lower in the group with high values for right atrial pressure. The expression levels of phospholamban, cardiac calsequestrin and sodium calcium exchanger mRNAs were comparable among all three groups. CONCLUSIONS:
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Authors | N Uemura, T Ohkusa, K Hamano, M Nakagome, H Hori, M Shimizu, M Matsuzaki, S Mochizuki, S Minamisawa, Y Ishikawa |
Journal | European journal of clinical investigation
(Eur J Clin Invest)
Vol. 34
Issue 11
Pg. 723-30
(Nov 2004)
ISSN: 0014-2972 [Print] England |
PMID | 15530144
(Publication Type: Journal Article, Research Support, Non-U.S. Gov't)
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Chemical References |
- Calcium-Binding Proteins
- Calsequestrin
- Muscle Proteins
- Proteolipids
- RNA, Messenger
- Sodium-Calcium Exchanger
- phospholamban
- sarcolipin
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Topics |
- Adult
- Aged
- Atrial Fibrillation
(etiology, genetics)
- Calcium-Binding Proteins
(genetics)
- Calsequestrin
(genetics)
- Chronic Disease
- Down-Regulation
(genetics)
- Female
- Gene Expression
(genetics)
- Heart Atria
(metabolism)
- Humans
- Male
- Middle Aged
- Mitral Valve Insufficiency
(complications, genetics)
- Mitral Valve Stenosis
(complications, genetics)
- Muscle Proteins
(genetics)
- Myocardium
(metabolism)
- Proteolipids
(genetics)
- RNA, Messenger
(analysis)
- Sodium-Calcium Exchanger
(genetics)
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