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Atherosclerosis is a pathologic disorder which has an important role in the occurrence of coronary heart disease. It is determined as a focal, inflammatory proliferative response to several types of endothelial damage. Apolipoprotein B which is a requirement in the sustenance of cholesterol homeostasis, and is the major protein component of low density lipoprotein, characterized by multitude polymorphic sites, one of which (12669G&gt;A) is related to the levels of serum lipid profiles, coronary artery disease and/or myocardial infarction. One Common polymorphism which is more important in this process is 12669G&gt;A that is appraised in this research. We recruited 80 patients from the Mousavi hospital, Zanjan, Iran, diagnosed with coronary artery disease by the clinician on the basis of clinical symptoms, echocardiogram result, and angiography. Seventy-seven healthy individuals without any evident symptoms of Coronary stenosis and any past history of the disease were taken as controls from the general population. We carried out PCR using specific primers. Then, we digested PCR product by RFLP. Lipid parameters by biochemical methods and Apolipoprotein B serum level by immunoturbidometry method were done. Genotype frequencies for 12669G&gt;A polymorphism were determined: 55 % R+R+, 45 % R+R- in case group, and 55.8 R+R+, 44.2 % R+R- in controls. The R-R- genotype was not seen. There was no significant relationship between this polymorphism and the risk of Coronary stenosis (P = 0.6). In the present study, higher plasma levels of cholesterol and low density lipoproteins in the subjects with R+R- genotype were found while there was no association between this polymorphism and coronary stenosis with ≥50 % in the Zanjan population.

indian journal of clinical biochemistry

Association of the 12669G&gt;A Apolipoprotein B Gene Polymorphism with Apo-B Serum Level and Lipid Profile in Patients with Coronary Artery Disease Comparing with Individuals Without Coronary Artery Disease in Zanjan Population of Iran