[Association between acanthosis nigricans and metabolic syndrome in children with obesity]

To investigate adipokines levels in obese children with acanthosis nigricans (AN) and to explore the relationship between AN and metabolic syndrome (MS).A cross-sectional study was performed on 109 obese children and 47 age- and gender-matched normal controls. The obese children were divided into two groups with AN and without AN. Serum levels of adiponectin, leptin, TNF-α and retinol-binding protein 4 (RBP4) were measured using ELISA. Multiple logistic regression analysis was performed to estimate the association of clinical parameters with MS.Waist-hip ratio, systolic blood pressure, triglyceride, fasting insulin and insulin resistance index (HOMA-IR) were significantly higher in obese children with AN than in those without AN and normal controls (P0.05). The obese children with AN and without AN had lower adiponectin levels than normal controls (P0.05), on the contrary, the obese children with AN had higher leptin levels than those without AN and normal controls (P0.05). Multiple logistic regression analysis revealed that AN (OR=3.469, 95%CI: 1.518-7.929) and BMI (OR=7.108, 95%CI: 2.359-21.416) were independent risk factors for MS.As a visible marker of insulin resistance, AN is associated with abnormal adipokines secretion. Reducing the incidence of AN and losing weight may prevent obesity associated MS.