Omentin-1 Changes following Biliopancreatic Diversion and Relationship with Cardiovascular Risk Factors

Omentin-1 might play a role in the pathogenesis of insulin resistance and obesity. The aim of the present study was to evaluate the influence of weight loss after biliopancreatic diversion on serum omentin-1 concentrations. Material and Methods A Caucasian population of 24 morbid obese patients was analyzed before and after 12 months of a biliopancreatic diversion surgery. Biochemical and anthropometric evaluation were realized at basal visit and at 12 months. Body weight, fat mass, waist circumferences, blood pressure, fasting blood glucose, fasting insulin, insulin resistance (HOMA-IR), lipid concentrations and omentin-1 were measured.

After bariatric surgery and in both gender groups (males vs. females); BMI, weight, fat mass, waist circumference, blood pressure, glucose , total cholesterol, LDL cholesterol, triglycerides, HOMA-IR and fasting insulin decreased in a statistical manner from basal values. Omentin-1 levels increased after bariatric surgery and in both gender the improvement was similar (males vs. females); (delta: -87.1 ± 19.0 ng/dL; p = 0.02 vs. -93.8 ± 28.1 ng/dL; p = 0.03). In the multiple regression analysis adjusted by age and sex; BMI kg/m2 (Beta -0.32: 95% CI -3.98 to -0.12) and insulin UI/L (Beta -0.41: 95% CI -8.38 to -0.16) remained in the model with basal omentin-1 levels as dependent variable. The regression model with post-surgery omentin-1 levels as dependent variable showed as independent variables BMI kg/m2 (Beta -0.13: 95% CI -7.69 to -0.09) and insulin UI/L (Beta -0.24: 95% CI -5.69 to -0.08), too.

This study showed a significant increase in omentin-1 levels after weight loss secondary biliopancreatic diversion surgery. A weak negative correlation with BMI and basal insulin levels was detected.