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Apolipoproteins AI, B, and E polymorphisms in severe aortic valve stenosis

Authors


Corresponding author: Antonio P Mansur, Heart Institute (InCor), University of São Paulo Medical School, Av. Dr. Enéas C. Aguiar, 44, CEP 05403-000-São Paulo, Brazil. Tel.: +55 11 30695387;
fax: +55 11 30695348;
e-mail: corantonio@incor.usp.br

Abstract

Hypercholesterolemia has been related to aortic valve stenosis (AS). Polymorphisms of apolipoproteins (apo) AI, B, and E are associated with variable levels of plasma lipids, but the association between these polymorphisms and AS is unknown. In a case–control study of groups matched by age, sex, comparable body mass index, hypertension, triglycerides, high-density lipoprotein (HDL) cholesterol, and low-density lipoprotein (LDL) cholesterol, we analyzed the distribution of apo AI A/G mutation, apo B signal peptide insertion/deletion, apo B XbaI restriction fragment length, and apo E polymorphisms in 62 non-diabetic patients with severe aortic valve stenosis and 62 control subjects. All patients underwent echocardiographic analysis. Univariate analysis showed a higher prevalence of the XbaI X+/X+ genotype (p=0.007) of apo B and the apo E2 allele (p=0.034) in patients with severe AS. Apo polymorphisms were not associated with lipid levels, left ventricular mass, or the aortic gradient.

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