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Original Article

Serum adiponectin levels in different types of non alcoholic liver disease. Correlation with steatosis, necroinflammation and fibrosis

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Abstract Background and study aims : In recent studies adiponectin has been implicated in the pathogenesis of non alcoholic liver disease (NAFLD), a common chronic liver disease with a broad spectrum of histopathologic findings. The aim of this study was to investigate the correlation between serum adiponectin levels and steatosis, necroinflammation and fibrosis in different types of NAFLD patients. Patients and methods : Forty three patients with elevated liver enzymes and biopsy proven non alcoholic fatty liver disease and 38 patients with clinically diagnosed NAFLD and permanently normal liver enzymes were prospectively enrolled in the study. Patients with biopsy proven NAFLD were divided into two groups : non alcoholic steatohepatitis (NASH) : 25 patients and simple steatosis : 18 patients. Serum adiponectin levels were measured with an ELISA immunoassay, and BMI, fasting serum glucose, total and HDL cholesterol, fasting triglyceride levels and insulin resistance were determined. Results : Groups did not differ in age, sex, BMI, waist circum - ference and HOMA – IR. Only patients with confirmed NASH had lower serum adiponectin levels in comparison to NAFLD patients with both abnormal (6.6 ± 4.7 μg/mL vs 10.8 ± 5.6 μg/mL, p = 0.01) as well as normal liver enzymes (6.6 ± 4.7 μg/mL vs 9.2 ± 4.8 μg/mL, p = 0.01). For the whole NAFLD group with elevated liver enzymes no correlation was found between serum adiponectin levels and the degree of liver steatosis or fibrosis stage. Also no correlation was found between adiponectin levels and BMI, ALT, AST, g GT or HOMA-IR. Conclusions : Patients with established NASH have lower serum adiponectin levels than NAFLD patients with normal or abnormal liver enzymes. Adiponectin was not associated with the severity of hepatic fibrosis. (Acta gastro enterol. belg., 2008, 71, 355-360). [Product Details...]