Background: Acanthosis nigricans (AN) is a skin condition commonly often accompanied by insulin resistance and hyperinsulinemia. Patients with AN are prone to diabetes, especially in young obesity. Metformin were usually used to treat these patients. However, reports about the effectiveness of LSG surgery on young obese patients with AN are rare.

Objective: The aim of our study was to evaluate the efficacy of LSG surgery on insulin secretion patterns and anthropometric variables for obese patients with AN.

Methods: 30 young obese patients with AN were recruited for this study. Before and at 12 months after the LSG surgery, BMI and blood samples were collected. OGTT were used to evaluate the insulin level and its rhythm of secretion. AN extent and AN texture were determined according to the scale developed and validated.

Results: For these patients, BMI decreased from 40.98±4.93 kg/m2 to 27.27±4.13 kg/m2 at 12 months after surgery. Along with weight loss, triglycerides and total cholesterol decreased significantly, and high-density lipoprotein cholesterol (HDL-C) increased significantly as of 12 months after surgery. But the change of low-density lipoprotein cholesterol (LDL-C) is not obvious. A significant decrease in insulin resistant (HOMA-IR) was observed. The insulin release curves showed hyperinsulinemia and abnormal rhythm of secretion before surgery. At 12 months after surgery the fasting, 2h postprandial insulin levels and the rhythm of insulin secretion were restored to normal level. But the insulin levels at 30min and 60min were higher than before surgery. The extent of AN for most patients were improved. Only 23.4% patients still were severe (vs. 59.3% before surgery). More than 50% patients were remission.

Conclusion: In this study of LSG in obesity patients with AN, we found significant improvements in weight, dyslipidemia, hyperinsulinemia and AN extent. LSG will be a new effective therapeutic approach for young obesity patients with AN.


C. Qian: None. S. Qu: None. C. Zhu: None. J. Gao: None. F. Mei: None. L. Bu: None.

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