Significant impact of chromosomal locus 1p13.3 on serum LDL cholesterol and on angiographically characterized coronary atherosclerosis.
OBJECTIVE
Recently, a significant impact of a new locus on chromosome 1p13.3 on serum LDL (low-density lipoprotein) cholesterol and clinical events of coronary artery disease (CAD) was described. Potential associations between variants on this locus and angiographically characterized coronary atherosclerosis are unknown. We therefore aimed at investigating the association of variants of locus 1p13.3 with coronary atherosclerosis.


METHODS
We performed genotyping of variants rs599839, rs646776, and rs4970834 on chromosome 1p13.3 in a large cohort of 1610 consecutive Caucasian patients undergoing coronary angiography, where lesions of 50% or more were classified as significant.


RESULTS
Compared to the homozygous common allele the rare alleles of variants rs599839, rs646776, and rs4970834 were significantly associated with decreased serum LDL cholesterol (132+/-40mg/dl vs. 125+/-36mg/dl, P=0.003, 132+/-40mg/dl vs. 124+/-36mg/dl, P<0.001, and 131+/-40mg/dl vs. 125+/-37mg/dl, P=0.005, respectively). Further, carriers of the rare alleles of variants rs599839 and rs646776 were at a significantly lower risk of significant coronary stenoses than subjects who were homozygous for the frequent alleles, with odds ratios (ORs) of 0.78 [0.63-0.96]; P=0.019 and 0.74 [0.60-0.91]; P=0.004, respectively. After multivariate adjustment including LDL cholesterol, the protective effect of the rare allele of variant rs646776, but not of variant rs599839, on CAD risk remained significant (OR=0.77 [0.61-0.98], P=0.034).


CONCLUSIONS
We conclude that chromosomal locus 1p13.3 is significantly associated with both, serum LDL cholesterol and coronary atherosclerotic lesions.
Muendlein
Axel
A
Vorarlberg Institute for Vascular Investigation, A-6807 Feldkirch, Austria.
Geller-Rhomberg
Simone
S
Saely
Christoph H
CH
Winder
Thomas
T
Sonderegger
Gudrun
G
Rein
Philipp
P
Beer
Stefan
S
Vonbank
Alexander
A
Drexel
Heinz
H
D000368:Aged; D008078:Cholesterol, LDL / Q000097:blood* / Q000235:genetics; D002878:Chromosomes, Human, Pair 1; D017023:Coronary Angiography; D003324:Coronary Artery Disease / Q000000981:diagnostic imaging / Q000235:genetics*; D023921:Coronary Stenosis / Q000235:genetics*; D005260:Female; D005787:Gene Frequency; D056426:Genetic Loci; D006801:Humans; D008297:Male; D008875:Middle Aged; D012306:Risk; D044465:White People / Q000235:genetics
D008078:Cholesterol, LDL