Association between the rs3813627 Single Nucleotide Polymorphism and HDL and APOA1 Levels Through BMI.

The interaction between obesity and genetic traits on high density lipoprotein (HDL) levels has been extensively studied. The variance of serum HDL has a strong genetic heritability, although the studied variant only explains a small part of this variation. The goal of this study was to investigate the associations between the apolipoprotein type 2 ( rs3813627 single nucleotide polymorphism (SNP) and anthropometric and biochemical variables, though body mass index (BMI). This study included 153 subjects (91 overweight/obese (BMI³25 kg/m) and 62 non-obese individuals (BMI < 25 kg/m)). The rs3813627 SNP was selected and genotyped. Genotype analysis was performed to analyze the associations between SNPs and anthropometric and biochemical variables through BMI. The rs3813627 TT genotype was associated with low HDL levels in comparison with the rs3813627 GG and GT genotype in overweight/obese individuals, but not in the non-obese subjects ( < 0.05). The same trend was observed in the apolipoprotein type 1 (APOA1) protein levels ( < 0.05). Correlation analysis revealed a negative correlation between HDL and APOA1 levels and rs3813627 SNP under recessive model ( < 0.05). The odds ratio for low HDL levels was 3.76 and 3.94 for low APOA1 levels. The mediation analysis of rs3813627 SNP through BMI showed a full mediation on HDL and partial mediation on APOA1 levels ( < 0.05). Bioinformatic analysis showed that rs3813627 lies in the promoter and overlaps motifs for several bound transcription factors. : On the basis of these data, the rs3813627 SNP is associated with low HDL and APOA1 levels susceptibility, and this effect was mediated by an increased BMI.