The "T" allele of apolipoprotein A5 rs2075291 is significantly associated with higher total cholesterol and triglyceride and lower high-density lipoprotein cholesterol levels in Asians: a meta-analysis

Abstract

Previous studies have discussed the association between apolipoprotein A5 (APOA5) gene rs2075291 polymorphism and lipid levels, but the results were inconsistent. The meta-analysis was performed to evaluate the reported effects of rs2075291 polymorphism on blood lipid levels, including total cholesterol (TC), triglycerides (TG), low-density lipoprotein cholesterol (LDL-C), and high-density lipoprotein cholesterol (HDL-C) in Asians. A literature search was performed in six databases from January 1, 2001 to March 1, 2017. A standardized mean difference (SMD) with 95% confidence interval (95% CI) was computed to estimate the effect value. Overall, 10 articles with 19 reports were included and most of them were from Chinese institutions. Pooled results indicated significant effects of rs2075291 on lipid levels in Asians; the carriers of T allele had higher TC and TG levels but lower HDL-C level than the non-carriers, and the corresponding SMD (95% CI) were 0.20 (0.04-0.36), 0.74 (0.54-0.94), and -0.17 (-0.33 to -0.00), respectively. No significant difference was found for the LDL-C level: P = .172. Although results from the meta-analysis suggest that the T allele of the APOA5 rs2075291 is associated with higher TC and TG levels and lower HDL-C levels, large-scale studies considering the gene-gene and gene-environment interaction are needed to further explore the effects of rs2075291 polymorphism on blood lipid levels in different ethnicities.

Keywords: APOA5 gene; Asian population; Lipid levels; Meta-analysis; Rs2075291 polymorphism.