AGT and ACE genes influence classic mitral valve prolapse predisposition in Marfan patients.

Abstract:

BACKGROUND:In Marfan syndrome, the mitral valve prolapse, ranging from nonclassic to classic form on the basis of the leaflet thickness, is a common condition characterized by a highly variable structural abnormality. We investigated the role of angiotensinogen (AGT) M235T, angiotensin converting enzyme (ACE) I/D and angiotensin II type 1 receptor (AT1R) A1166C polymorphisms in influencing the susceptibility to classic or non-classic mitral valve prolapse in Marfan patients. METHODS:We studied 135 Marfan patients with mitral valve prolapse, diagnosed by echocardiography. AGT, ACE, and AT1R polymorphisms were identified by polymerase chain reaction-based restriction analysis. RESULTS:The frequency of the ACE D, but not AGT 235T and AT1R 1166C allele, was significantly higher in patients with classic mitral valve prolapse in comparison to that observed in the non-classic one (p=0.03). The percentage of subjects with the contemporaneous presence of ACE D and AGT 235T alleles was significantly higher in the classic mitral valve prolapse group in comparison to the non-classic one (79% vs. 55%, respectively; p=0.008). The concomitant presence of these two alleles was associated with increased susceptibility to the classic mitral valve prolapse (OR 3.02, p=0.016). CONCLUSIONS:Our findings show a possible role of ACE and AGT genes as predisposing factors to classic mitral valve prolapse in Marfan patients, thus suggesting a role of renin angiotensin system genes in modulating mitral valve abnormality, and the need for an interventional study with angiotensin II type 1 receptor antagonists, which considers the leaflet thickness progression in Marfan patients with MVP.

journal_name

Int J Cardiol

authors

Fatini C,Attanasio M,Porciani C,Sticchi E,Padeletti L,Lapini I,Abbate R,Gensini GF,Pepe G

doi

10.1016/j.ijcard.2006.12.015

subject

Has Abstract

pub_date

2008-01-24 00:00:00

pages

293-7

issue

3

eissn

0167-5273

issn

1874-1754

pii

S0167-5273(07)00301-4

journal_volume

123

pub_type

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