Association of Monocyte Chemoattractant Protein-1 (MCP-1) 2518 A/G Polymorphism with Obesity in Korean Type 2 Diabetes Mellitus

Purpose: Monocyte chemoattractant protein-1 (MCP-1) is a member of the CC chemokine family, and the MCP-1 2518 A/G gene polymorphism is reported to be correlated with chronic inflammatory diseases, including insulin resistance and metabolic syndrome. However, few studies have investigated the association between MCP-1 gene polymorphisms and obesity in patients with type 2 diabetes mellitus (T2DM). We conducted a retrospective case-control study and evaluated the association between the MCP-1 2518 A/ G polymorphism and obesity in Korean patients with T2DM. Patients and Methods: This single-center, retrospective, case-control study enrolled 526 Korean patients with T2DM. Obesity was defined using the body mass index (BMI) with a cutoff level of 25 kg/m2. 2 . Polymerase chain reaction-restriction fragment length polymorphism was used to analyze MCP-1 2518 A/G polymorphism; the genotypes was presented as GG, AG, or AA. We compared the MCP-1 2518 A/G polymorphism with the prevalence of diabetic complications, as well as clinical and biochemical characteristics. Results: The obese group had a higher number of females and higher C-peptide, insulin, triglycerides, aspartate transaminase (AST), and alanine transaminase (ALT) levels. The obese group also had a higher prevalence of cardiovascular disease than the non-obese group. The obese group had a higher frequency of the MCP-1 2518 AA genotype and the A allele than the non-obese group. The results of multiple logistic regression analysis showed that the non-G allele of MCP-1 was significantly associated with obesity (odds ratio (OR), 1.888; P=0.016). Conclusion: This study demonstrates that the MCP-1 2518 A/G polymorphism is associated with obesity in Korean patients with T2DM. Further studies involving various ethnic groups are required to validate our results.