The CAG repeat polymorphism in the androgen receptor gene is associated with HDL-cholesterol but not with coronary atherosclerosis or myocardial infarction.

Abstract:

BACKGROUND:Age-adjusted morbidity and mortality rates from coronary heart disease (CHD) are higher in men than in women. Androgens are suspected to be responsible for the male disadvantage. The genomic effect of androgens is mediated by the androgen receptor (AR), which has a polymorphic CAG repeat in exon 1. The number of repeats is inversely related to the transcriptional activity of the AR on target genes. METHODS:We investigated the association of this CAG repeat polymorphism with CHD and myocardial infarction (MI) in 2 independent case-control studies involving 544 Caucasian men. RESULTS:The number of CAG repeats in the AR gene correlated significantly with HDL-cholesterol (HDL-C) in controls (r = 0.21; P = 0.015). This effect was independent of triglycerides, body mass index, alcohol intake, smoking, and age in a multiple regression model (R(2) = 50%). Despite decreased HDL-C, lower CAG repeat numbers were not associated with increased risk for CHD (odds ratio = 0.82; 95% confidence interval, 0.50-1.36; P = 0.44) or MI in carriers of AR genes with lower CAG repeat numbers (odds ratio = 0.72; 95% confidence interval, 0.37-1.39; P = 0.33). CONCLUSIONS:Shorter, more androgenic AR alleles with fewer CAG repeats are associated with lower HDL-C, but not with an increased risk for CHD or MI, which argues against a detrimental androgen effect on cardiovascular risk under physiologic conditions.

journal_name

Clin Chem

journal_title

Clinical chemistry

authors

Hersberger M,Muntwyler J,Funke H,Marti-Jaun J,Schulte H,Assmann G,Lüscher TF,von Eckardstein A

doi

10.1373/clinchem.2005.049262

subject

Has Abstract

pub_date

2005-07-01 00:00:00

pages

1110-5

issue

7

eissn

0009-9147

issn

1530-8561

pii

clinchem.2005.049262

journal_volume

51

pub_type

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