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Recently, four GGT fractions (big-, medium-, small-, free-GGT) were described in humans. We aimed to investigate whether a specific GGT fraction pattern is http://www.selleckchem.com/products/dabrafenib-gsk2118436.html associated with NAFLD. Gamma-glutamyltransferase fractions were determined in patients with NAFLD (n?=?90), and compared with those in control subjects (n?=?70), and chronic hepatitis C (CHC, n?=?45) age and gender matched. Total GGT was elevated in NAFLD as compared to controls (median, 25��C75��percentile: 39.4, 20.0�C82.0?U/L vs. 18.4, 13.2�C24.9?U/L respectively, P? http://www.selleckchem.com/products/sch772984.html show any value in the differential diagnosis between NAFLD and CHC (ROC-AUC 0.507, P?=?n.s.), while b-GGT/s-GGT ratio showed the highest diagnostic accuracy for distinguishing NAFLD and CHC (ROC-AUC: 0.93; cut-off value 0.16, sensitivity 82%, specificity 90%). b-GGT increases in NAFLD, but not in CHC. GGT fraction analysis might help in improving the sensitivity and specificity of the diagnosis of NAFLD and other liver dysfunctions. ""Non-alcoholic fatty liver disease (NAFLD) is a major health problem and occurs frequently in the context of metabolic syndrome and type 2 diabetes mellitus. Hepatocyte-specific Pten-deficiency in mice was shown previously to result in hepatic steatosis due to hyperactivated AKT2. However, the role of peripheral insulin-sensitive tissues on PTEN- and AKT2-dependent accumulation of hepatic lipids has not been addressed. Effects of systemically perturbed PTEN/AKT2 signalling on hepatic lipid content were studied in Pten-haplodeficient (Pten+/?/Akt2+/+) mice and Pten-haplodeficient mice lacking http://www.selleck.cn/products/z-vad-fmk.html Akt2 (Pten+/?/Akt2?/?). The liver and skeletal muscle were characterized by histology and/or analysis of insulin signalling. To assess the effects of AKT2 activity in skeletal muscle on hepatic lipid content, AKT2 mutants were expressed in skeletal muscle of Pten+/+/Akt2+/+ and Pten+/?/Akt2+/+ mice using adeno-associated virus 8. Pten+/?/Akt2+/+ mice were found to have a more than 2-fold reduction in hepatic lipid content, at a level similar to that observed in Pten+/?/Akt2?/? mice. Insulin signalling in the livers of Pten+/?/Akt2+/+ mice was enhanced, indicating that extrahepatic factors prevent lipid accumulation. The skeletal muscle of Pten+/?/Akt2+/+ mice also showed enhanced insulin signalling.