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Circ Cardiovasc Genet. 2009 Aug;2(4):329-37. doi: 10.1161/CIRCGENETICS.108.834986. Epub 2009 May 14.

Genome-wide association scan identifies variants near Matrix Metalloproteinase (MMP) genes on chromosome 11q21-22 strongly associated with serum MMP-1 levels.

Author information

1
Division of Endocrinology, Diabetes and Nutrition, School of Medicine, University of Maryland, Baltimore, MD, USA. ycheng@medicine.umaryland.edu

Abstract

BACKGROUND:

Matrix metalloproteinase (MMP)-1 may play a role in cardiovascular disease susceptibility by influencing plaque rupture via its ability to degrade extracellular collagens.

METHODS AND RESULTS:

We performed a genome-wide association analysis of circulating MMP-1 levels using 500 K single-nucleotide polymorphisms (SNPs) to identify genes influencing variation in serum MMP-1 levels in 778 healthy Amish adults. Serum MMP-1 levels, logarithm transformed, and adjusted for age and sex, were screened for association with SNPs using mixed-model variance components to account for familial relatedness. Median MMP-1 level was 3.05 ng/mL (interquartile range: 1.82 to 5.04 ng/mL) with an estimated heritability of 81% (P<0.0001). Serum MMP-1 levels were strongly associated with a cluster of 179 SNPs extending over an 11.5-megabase region on chromosome 11q. The peak association was with rs495366 (P = 5.73 x 10(-34)), located within the region between MMP-1 and MMP-3 and having a minor allele frequency of 0.36. Two other SNPs within the 11q region, rs12289128 and rs11226373, were strongly associated with MMP-1 levels after accounting for rs495366 (P < or = 10(-7)). These 3 SNPs explained 31% of the variance in MMP-1 levels after adjusting for age and sex.

CONCLUSIONS:

This study provides strong evidence that the serum MMP-1 level is highly heritable and that SNPs near MMPs on chromosome 11q explain a significant portion of the variation in MMP-1 levels. Identification of the genetic variants that influence MMP-1 levels may provide insights into genetic mechanisms of cardiovascular disease.

PMID:
20031604
PMCID:
PMC2801898
DOI:
10.1161/CIRCGENETICS.108.834986
[Indexed for MEDLINE]
Free PMC Article

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