Liver Diseases Clinical Trial
Official title:
Study of the Role of Insulin Resistance in the Pathogenesis of the Metabolic Syndrome and of Non-alcoholic Steatohepatitis
The purpose of this study is to assess how the macronutrient composition of the diet effects
- lipid and glucose metabolism
- intrahepatic lipids
- insulin sensitivity
in healthy lean subjects and in subjects with a high metabolic risk (ie overweight and
offsprings of patients with type 2 diabetes mellitus).
The study is aimed at assessing the effects of changes in total energy, sugars, lipids, and
protein intake on intrahepatic lipids, plasma lipids, and hepatic and whole body insulin
resistance in
- lean men and women with no family history of diabetes
- overweight men and women
- lean men with a family history of type 2 diabetes
Subjects are studied after a 6-day period of
- isocaloric diet with 100% calorie requirement, of which 55% carbohydrate, 15% protein,
and 30% fat)
- the same isocaloric diet supplemented with 3g/kg body weight/day fructose
- hypercaloric high fat diet with 130% energy requirement, of which 55% carbohydrate, 15%
protein, 60% fat
- hypercaloric high fat+protein diet with 145% energy requirement, of which 55%
carbohydrate, 30% protein, 60% fat
Measurements performed after 6 days on each diet include
- intrahepatic and intramyocellular lipids (1H-MRS)
- hepatic and whole body insulin sensitivity (hyperinsulinemic-euglycemic clamp)
- body weight
- plasma concentrations of hormones and substrates
- gene expression profile in skeletal muscle (vastus lateralis) and adipose tissue
(subcutaneous abdominal)
;
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