Direct Versus Indirect Effect of Amino Acids on Hepatokines

"The experimental days consist of four study days:~1. Assessment of liver fat and visceral fat by magnetic resonance imaging (MRI; 6-point Dixon) (study day A)~2. Somatostatin infusion (4 hours) plus amino acid infusion (45 minutes) (study day B)~3. Saline infusion (4 hours) plus amino acid infusion (45 minutes) (study day C)~4. Somatostatin infusion (4 hours) plus saline infusion (45 minutes) (study day D)~The subjects will participate in the experimental days (study day B to D) in randomized order on three different days. For study day B to D, at timepoint t = -75, subjects will receive either; a 240-minute intravenous infusion of a somatostatin analogue (at 200 ng/kg/min (infusion rate will not exceed 1000 µg/hour) or saline. After 75 minutes (timepoint t = 0), the subjects will receive a 45-minute intravenous infusion of amino acids or saline at 3.885 ml/kg/hour.~In total, blood will be sampled 11 times over a period of 6 hours and 15 minutes."