Is LOX-1 K167N polymorphism protective for coronary artery disease?

基因型 等位基因 冠状动脉疾病 内科学 内分泌学 单核苷酸多态性 等位基因频率 基因型频率 生物 医学 基因 遗传学
作者
Özlem Kurnaz,Hülya Yılmaz,C. Selim Isbir,Atike Tekeli,Turgay İşbir
出处
期刊:PubMed 卷期号:23 (6): 969-73 被引量:16
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Human lectin-like oxidized low-density lipoprotein receptor 1 (LOX-1, OLR1) has been identified as a cell surface endocytosis receptor for oxidized low-density lipoprotein (oxLDL) on vascular endothelial cells. OxLDLs are avidly ingested by macrophages, resulting in foam cell formation. OxLDLs are also involved in inducing smooth muscle cell migration, proliferation and transformation. A single nucleotide polymorphism K167N (G501C) of the LOX-1 gene results in an amino acid dimorphism (Lys/Asn) at residue 167. Replacement of this Lys residue causes reduced binding and internalization of oxLDL. The purpose of this study was to investigate the effect of the LOX-1 K167N gene polymorphism in Turkish patients with coronary artery disease (CAD).K167N polymorphism were studied in 91 patients with CAD and 72 healthy controls by the PCR-RFLP method.The frequencies of the KK genotype and the K allele were higher in the CAD group than the controls (p<0.05), while the frequency of the NN genotype was higher in the control group than in the CAD group (p<0.05). It was observed that the decreased CAD risk in patients who had the N allele was reversed by male sex (OR: 0.400 -->0.481) and smoking (OR: 0.400 -->0.949). Although male sex and smoking were lower than other cardiovascular risk factors in patients with the N allele they were higher than other cardiovascular risk factors in patients with the K allele.Male sex and smoking decrease the protective effects of the N allele. The adverse effects of the K allele on the CAD risk resulting from the K167N polymorphism appear to be independent of other cardiovascular risk factors.

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