Association of SRB1 and PON1 gene polymorphisms with type 2 diabetes mellitus: a case control study

Abstract

Single-nucleotide polymorphism (SNP) in Paraoxonase 1 (PON1) and scavenger receptor class b member 1 (SRB1) gene has been associated with impairing high-density lipoprotein (HDL) functionality as an antioxidant and shown to diminish ability of PON1 in cholesterol homeostasis. Several studies found that SRB1 and PON1 polymorphism increases T2DM risk. Our study aimed to investigate the association and susceptibility of polymorphic variants in SRB1 rs9919713 and PON1 rs662 with type 2 diabetes mellitus. In the present case-control study, 250 type 2 diabetes mellitus patients (T2DM) and 250 healthy volunteer were recruited. The genotypes of PON1 and SRB1 were determined by using polymerase chain reaction-restriction fragment length polymorphism (RFLP-PCR) technique, and biochemical analysis was done using standard protocol. C and R alleles showed significant association with T2DM susceptibility with an odds ratio of 1.42 (p < 0.005) and 1.40 (p < 0.007), respectively. The frequency of CC and RR genotype was significantly higher in T2DM patients compared with healthy controls. Furthermore, CC and RR genotypes were significantly associated with higher LDL and low HDL levels. Additionally, no other significant association was observed. We conclude that the PON1 and SRB1 gene polymorphisms may probably surrogate biomarkers for T2DM susceptibility.