Objective: To detect the association of apolipoprotein E(apoE) gene polymorphism with early-onset coronary heart disease(CHD) and to evaluate the effect of apoE gene polymorphism on plasma lipid levels.
Methods: The apoE genotypes of 52 early-onset CHD patients (aged 38-55 years), 161 aged CHD patients and 180 controls were determined by PCR-RFLP. Plasma lipid levels were measured by using routine methods.
Results: Five genotypes of apoE, E3/3, E4/4, E3/2, E4/3 and E4/2 were detected in this study. Statistically differences in apoE4/3 and epsilon4 frequencies between early-onset and aged CHD patients and controls were seen (P<0.05). The frequency of epsilon4 in the early-onset CHD patients was higher than that in the aged CHD patients. epsilon4 and epsilon2 alleles also differently affected the plasma total cholesterol and low density lipoprotein cholesterol levels.
Conclusion: These results suggest that apoE gene polymorphism is in association with the occurrence and development of early-onset CHD and it affects the plasma lipid levels.
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