RESUMEN
<p><b>OBJECTIVE</b>To investigate the relationship between matrix metalloproteinase (MMP) 1 gene -519A/G polymorphism and the risk of coronary heart disease (CHD) in Northern Chinese Han population.</p><p><b>METHODS</b>A total of 517 patients with CHD and 380 healthy adults diagnosed by coronary angiography were genotyped by polymerase chain reaction-restriction fragment length polymorphism and DNA sequence technology for the -519A/G polymorphism in MMP1 gene.</p><p><b>RESULTS</b>(1) The frequency of AA genotype was significantly higher in patients with CHD than that in controls [67.70% (350/517) vs. 40.26% (153/380), OR = 1.64, P < 0.001, 95%CI: 1.44 - 1.86]. People carrying A allele had increased risk for CHD (OR = 1.49, P < 0.001, 95%CI: 1.33 - 1.69). (2) The frequency of AA genotype was higher in patients with acute coronary syndrome (ACS) than patients with stable angina pectoris [68.81% (278/404) vs. 51.76% (44/85), P < 0.01, 95%CI: 1.04 - 1.27]. The A allele carriers were more likely to develop ACS (OR = 1.11, 95%CI: 1.01 - 1.21, P < 0.05).</p><p><b>CONCLUSION</b>Our data shows MMP1 gene -519A/G polymorphism is associated with the risk of CHD, and A allele carriers are more susceptible for CHD in Northern Chinese Han population.</p>