Abstract:
AIMS:Atrial fibrillation (AF) is the most frequent arrhythmia in humans. Rare familial forms exist. Recent evidence indicates a genetic susceptibility to common forms of AF. The alpha-subunit of the myocardial I(Kr)-channel, encoded by the KCNH2 gene, is crucial to ventricular and atrial repolarization. Patients with mutations in KCNH2 present with higher incidence of AF. Common variants in KCNH2 have been shown to modify ventricular repolarization. We intended to investigate, whether such variants may also modulate atrial repolarization and predispose to AF. METHODS AND RESULTS:In a two-stage association study we analysed 1207 AF-cases and 2475 controls. In stage I 40 tagSNPs (single nucleotide polymorphisms) from the KCNH2 genomic region were genotyped in 671 AF-cases and 694 controls. Of five associated variants, the common K897-allele of the KCNH2-K897T variant was replicated in n = 536 independent AF cases and n = 1781 controls in stage II [overall odds ratio 1.25, 95% confidence interval 1.11-1.41, P = 0.00033]. This association remained significant after adjustment for gender and age. CONCLUSION:We report a genetic association finding including positive replication between the K897-allele and higher incidence of AF. This provides a molecular correlate for complex genetic predispositions to AF. The consequences of the K897T variant at the atrial level will require further functional investigations.
journal_name
Eur Heart Jjournal_title
European heart journalauthors
Sinner MF,Pfeufer A,Akyol M,Beckmann BM,Hinterseer M,Wacker A,Perz S,Sauter W,Illig T,Näbauer M,Schmitt C,Wichmann HE,Schömig A,Steinbeck G,Meitinger T,Kääb Sdoi
10.1093/eurheartj/ehm619subject
Has Abstractpub_date
2008-04-01 00:00:00pages
907-14issue
7eissn
0195-668Xissn
1522-9645pii
ehm619journal_volume
29pub_type
杂志文章abstract:AIMS:Cardiac angiotensin-I converting enzyme (ACE) activity is influenced by the ACE I/D polymorphism. Evidence suggests that the DD-genotype may be a risk factor for cardiac hypertrophy and heart failure, especially in hypertensive subjects. We assessed the relation between the ACE I/D polymorphism and the risk of inc...
journal_title:European heart journal
pub_type: 杂志文章
doi:10.1016/j.ehj.2004.08.026
更新日期:2004-12-01 00:00:00
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journal_title:European heart journal
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doi:10.1093/oxfordjournals.eurheartj.a060920
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journal_title:European heart journal
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doi:
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更新日期:1995-11-01 00:00:00
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pub_type: 杂志文章
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journal_title:European heart journal
pub_type: 杂志文章
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更新日期:1988-01-01 00:00:00
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更新日期:1991-02-01 00:00:00