Nonalcoholic fatty liver disease (NAFLD) is frequently associated with obesity. NAFLD genetic susceptibility involves Patatin Like Phospholipase Domain Containing 3 (PNPLA3) rs738409 and Transmembrane 6 Superfamily Member 2 (TM6SF2) rs58542926 polymorphisms. To date, biochemical mechanisms that affect the "metabolic flexibility" in obese NAFLD subjects, in presence or absence of genetic susceptibility, need to be better clarified. Different studies demonstrated that a dietary intervention, accompanied by a physical personalized training, significantly reduce either the hepatic fat content either insulin resistance in overweight and obese subjects, independently of weight loss. On these bases, the aim of the study is to evaluate "metabolic flexibility" in obese NAFLD subjects taking in account their genetics (presence or absence of PNPLA3 and TM6SF2 polymorphisms) and the histopathological diagnosis of either simple steatosis or nonalcoholic steatohepatitis (NASH). In addition, the composition of gut microbiota will be evaluated. Finally, in this study, two distinct healthy dietary profiles accompanied by a personalized physical training, will be tested in order to comprehend whether and how "healthy diets" could be effective not only in the prevention, but also in the clinical treatment of NAFLD and other related conditions.

NCT02951546

Conditions

1. Non-alcoholic Fatty Liver Disease
2. Obesity

Interventions

1. Dietary Supplement: Mediterranean diet
2. Dietary Supplement: Low fat diet
3. Other: Aerobic exercise

MeSH:Liver Diseases Fatty Liver Non-alcoholic Fatty Liver Disease Obesity

HPO:Abnormality of the liver Decreased liver function Elevated hepatic transaminase Hepatic steatosis Obesity

NAFLD genetic susceptibility involves Patatin Like Phospholipase Domain Containing 3 (PNPLA3) rs738409 and Transmembrane 6 Superfamily Member 2 (TM6SF2) rs58542926 polymorphisms.