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Background  MMP1 is implicated in the pathogenesis of atherothrombotic cardiovascular disease. We aimed to elucidate genetic determinants of inflammatory marker levels, including circulating MMP1, in Taiwanese, and their association with obesity.    Methods  Five genetic polymorphisms around matrix metalloproteinase genes on chromosome 11q21-22 region were genotyped in 519 subjects.    Results  After adjusting for clinical covariates, two polymorphisms were significantly associated with MMP1 levels, rs1799750 and rs495366, using an additive inheritance model ( P  = 1.5x10 -4  and  P  = 2.57x10 -5 , respectively). Using dominant model, minor alleles of rs1799750 and rs495366 were associated with higher MMP1 levels ( P  = 1.3x10 -4  and  P  = 1.95x10 -5 , respectively). In haplotype analysis, two haplotypes inferred from five SNPs ( A2GATA  and  A1GATG ) were associated with MMP1 levels ( P  = 5x10 -4  and  P  = 8.47x10 -5 , respectively). Subgroup and interaction analysis revealed an association of rs1799750 and rs495366 with MMP1 levels only in non-obese subjects ( P  = 6.66x10 -6  and  P  = 4.38x10 -5 , respectively, and interaction  P  = 0.008 for rs1799750). Haplotype interaction analysis also showed significant interaction for haplotype  A1GATG  (interaction  P  = 0.003).    Conclusions  Genotypes/haplotypes around  MMP1  locus are associated with MMP1 levels in Taiwanese. Further, since genotypes/haplotypes near  MMP1  locus interact with obesity to set MMP1 levels, genetic determinants for MMP1 level may be different between obese and non-obese individuals.

bmc medical genetics

Genetic variants associated with circulating MMP1 levels near matrix metalloproteinase genes on chromosome 11q21-22 in Taiwanese: interaction with obesity