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Polymorphism in apoprotein-CIII gene and coronary heart disease
S S Hussain1, J Buraiki, N Dzimiri
1Departments of Biological and Medical Research, Cardiovascular Diseases, and Biomedical Statistics and Scientific Computing, King Faisal Specialist Hospital and Research Centre, Riyadh, Saudi Arabia.
Background:
The aim of this study was to look into the association, if any, of apoprotein-CIII variant allele with hypertriglyceridemia, hypercholesterolemia and coronary heart disease (CHD).
Patients And Methods:
The prevalence of a C to G substitution in the 3' untranslated region of apoprotein-CIII was studied in a sample of 92 angiographed Saudi subjects, consisting of 65 males and 27 females. The subjects were genotyped by amplification followed by digestion of the gene fragment containing the polymorphic site with Sac I restriction enzyme.
Results:
The variant allele of apoprotein-CIII was found to be associated neither with hypertriglyceridemia nor with hypercholesterolemia. However, a significant association of this allele (P<0.01) was found with coronary heart disease, independent of other risk factors such as smoking, diabetes and hypertension. An estimation of odds ratio using logistic regression with various risk factors in the model showed that the individuals with this rare allele were 3.4 times more at risk of developing coronary heart disease. This estimate of risk held even after analyzing a subset of individuals above 45 years of age.
Conclusion:
While the association between apoprotein-CIII variant allele and dyslipidemia could not be established in this study, the relationship between this marker and CHD was highlighted in the studied subjects.
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