Osteoprotegerin Expression and Serum Values in Obese Women with Type 2 Diabetes Mellitus

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Abstract Obesity and diabetes prevalence are increasing worldwide. We aimed by this work to detect the possible association of osteoprotegerin (OPG) gene expression with visceral adiposity indices and cardiometabolic risk factors among obese patients. This is research enrolled 150 controls and 150 obese cases subdivided into two subgroups non-diabetic (n = 70) and 80 patients with type 2 diabetes mellitus (T2DM). Circulating OPG expression levels were determined by RT-PCR. Serum OPG concentrations were assessed by ELISA.Our results explored that OPG serum levels were higher in the control group compared to obese women and obese diabetics had higher serum levels of OPG in comparison to obese non-diabetic patients. In obese group, regarding expression levels of OPG were higher than controls in diabetic obese patients, the blood expression levels of OPG were higher than non-diabetics patients. We found positive correlations between parameters of MetS and obesity indices, among them, the highest positive correlation found between VAI. After adjustment of the traditional risk factors, stepwise linear regression analysis test revealed that, OPG expression levels were independently correlated with HbA1c, HDL-cholesterol, and WHR. ROC analysis demonstrated that cutoff values of OPG expression levels and serum levels were 2.226 and 7.5; the AUC were 0.833 (95% CI = 0.821–0.946) and 0.981, respectively. Additionally, the sensitivities and the specificities of OPG expression were (90% and 86.2%), and OPG serum levels (98% and %94), respectively.OPG mRNA and serum levels are useful diagnostic biomarkers discriminate metabolic risk among obesity with or without T2DM.

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