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Background:  Previous studies have confirmed that  APOE  genotype is associated with lipid metabolism, but related studies are inconsistent. Therefore, we conducted this cross-sectional study to explore the associations between apolipoprotein E ( APOE ) genotypes and serum levels of fasting blood sugar, triglycerides, total cholesterol, high density lipoprotein, and low density lipoprotein in a cognitively normal aging Han Chinese population.   Methods:  One hundred sixty-nine community elders with normal cognitive function were included in the study. Based on multiplex amplification refractory mutation system polymerase chain reaction (PCR), these subjects were divided into three groups: (1) E2/2 or E2/3 ( APOE  E2); (2) E3/3 ( APOE  E3); and (3) E2/4, E3/4, or E4/4 ( APOE  E4). Correlations of serum levels of fasting blood sugar, triglycerides, total cholesterol, high density lipoprotein, and low density lipoprotein with  APOE  genotypes were assessed.   Results:  The results of Mann-Whitney analysis showed that the concentration of high density lipoprotein (HDL) in  APOE  E2 and E3 groups was higher than that in E4 groups ( p  < 0.05). Logistic regression analysis also suggested that a lower level of high density lipoprotein was associated with the E4 allele (adjusted odds ratio 0.164, 95% confidence interval 0.031~ 0.876,  P  = 0.034).   Conclusion:   APOE  E4 is associated with decreased serum high density lipoprotein concentration in healthy elderly. However, the above conclusions need to be further verified.

frontiers in endocrinology

Associations Between the Apolipoprotein E ε4 Allele and Reduced Serum Levels of High Density Lipoprotein a Cognitively Normal Aging Han Chinese Population