Analysis of R1587K polymorphism of ATP-binding cassette transporter A1 gene among type 2 diabetes mellitus Malaysian subjects

Objective: Impaired insulin resistance, insulin secretion and dysregulation of lipid and protein metabolism followed by environmental and genetic factors cause to Type 2 Diabetes Mellitus (T2DM) which is a complex polygenic disorder. Several studies have been reported that ATP Binding Cassette Transporter A1 (ABCA1) gene polymorphisms in known as one of the genetic risk factor for T2DM. This study was conducted to determine the frequency of ABCA1 gene by rs2230808 (R1587K) polymorphism in Malaysian subjects. Methods: The genotype for ABCA1 gene polymorphism was determined based on high resolution melting-PCR among 164 T2DM and 165 control subjects. Result: There was a significant difference between the subjects in terms of FPG (p value=0.036*). Regarding genotypic and allelic frequency, we could not find any significance in this polymorphism among subjects. The frequency of Wild Type (WT) genotypes among T2DM and control subjects was 56.7% and 61.8% respectively. In addition, the WT and Homozygous (HOM) genotypes were significantly higher in controls (p value=0.008 and p value=0.006 respectively) and the Heterozygous (HET) genotypes were higher in T2DM subjects (p value=0.001). Conclusion: The R1587K polymorphism of ABCA1 gene cannot be considered as a genetic risk factor for T2DM among Malaysian subjects