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Background  Polymorphisms in the  LPA  gene were associated with coronary artery disease (CAD). However, there are differences in the allelic frequencies, Lp(a) levels, and significant association with CAD according to ethnic groups. In this scenario, the main aim of this study was to assess the influence of the  LPA  polymorphisms on coronary lesions in Brazilian patients.    Methods  1,394 consecutive patients submitted to coronary angiography to study suggestive CAD and twenty coronary segments were scored. Genotyping for the  LPA  rs10455872 and rs3798220 polymorphisms were performed by high resolution melting analysis.    Results  The frequencies of the rs10455872 G and rs3798220 C variant alleles were 6.4% and 6.2%, respectively.  LPA  rs10455872 G variant allele was associated with higher odds ratio of having coronary lesions in an adjusted model (OR = 2.02, 95% CI = 1.10-3.72, p = 0.02). Scores of coronary lesions (extension, severity, and Gensini scores) were significantly different among rs10455872 genotype groups. Coronary lesions was not associated with  LPA  rs3798220 (OR = 1.09, 95% CI = 0.67-1.76, p = 0.73) and scores of coronary lesions were not different among rs3798220 genotypes.    Conclusions  We confirmed the association of the  LPA  rs10455872 with CAD in a large sample of Brazilian patients. For the  LPA  rs3798220, our finding is consistent with studies which showed the lack of this genetic association.

LPA rs10455872 polymorphism is associated with coronary lesions in Brazilian patients submitted to coronary angiography