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Article Abstract
Background: The polymorphic alleles of APOA5 (rs2266788 (C), rs3135506 (G)), LPA (rs10455872 (A), rs3798220 (G)) and 9p21.3 (rs1333049 (C), rs2383207(A)) have been reported in association with susceptibility of coronary artery disease (CAD) from genome wide association studies. We aimed to assess the association of genetic variants with coronary angiogram proven CAD, severity scored with modified Gensini score and association of risk for myocardial infraction (MI) in North Indian population.
Methods: We recruited 512 angiographic proven CAD patients (mean age 58.1±10.2years) and 272 controls (mean age 50.3±11.1years) with normal coronaries from North Indian population. The genotyping technique polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) was employed for rs2266788, rs3135506 and rs10455872. Amplified refractory mutation system-PCR (ARMS-PCR) was used for genotyping of rs1333049, rs2383207 and rs3798220 genetic variants.
Results: The polymorphic risk allele of variants rs2266788 (C), rs1333049 (C), rs2383207 (A) and heterozygous polymorphic alleles of rs2266788 (TC) were significantly associated with CAD. The homozygous alleles of rs22667788 (CC) and rs1333049 (CC) had also been significantly associated with CAD. The significance of association of rs2266788 (C, CC, TC) and rs1333049 (C, CC) increases with severity of CAD. The presence of mutant allele of rs2266788 (C) was associated with risk of MI and unstable angina (UA). Also, homozygous risk allele of rs2266788 (CC) significantly associated with risk of MI and UA in patients of chronic stable angina (CSA) patients. Whereas, the risk allele of rs1333049 (C) have shown the association with MI and UA compared to controls. The genetic variants of rs3135506 (G), rs10455872 (A) and rs3798220 (G) have low frequency in our population and reflected no association with CAD.
Conclusion: The polymorphic variants of Apo-A5; rs2266788 (C), 9p21.3; rs1333049 (C) rs2383207 (A) are associated with CAD, its severity and exerts the risk of MI in North Indian population.
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