The purpose of this study is to examine the effects of growth hormone during fasting in healthy lean men.
During fasting the human body is known to metabolize relatively large amounts of fat, in the expense of proteins and glucose. Partly this shift in metabolism is caused by increasing GH secretion, but exactly how growth hormone exerts these effects remains to be further investigated. 10 healthy lean young men are studied at 4 different occasions in a randomized single-blinded cross-over study. 1: after 12 hours of fasting + GH bolus, 2: after 36 hours of fasting + GH bolus, 3: after 36 hours + saline, 4: after 36 hours of fasting + Somavert. Aim: * to study the signal transduction in muscle and fat tissue * to study the metabolism during fasting * to study the intrahepatic fat content using magnetic resonance techniques
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
BASIC_SCIENCE
Masking
NONE
Enrollment
10
Somatropin are given intravenous, 0.5mg pegvisomant are given subcutaneous, 15 mg NaCl are given subcutaneous, 2 ml
Medical department M, Arhus Sygehus, Region midtjylland
Aarhus, Denmark
changes in intrahepatic lipid content
Time frame: 12 and 36 hours of fasting. respectively
changes in intracellular signaling during fasting
Time frame: 36 hours
changes in respiratory quotient
Time frame: 36 hours of fasting
metabolism
Time frame: 36 hours of fasting
insulin sensitivity
Time frame: 36 hours of fasting
forearm metabolism
Time frame: 36 hours of fasting
changes in FFA
Time frame: 36 hours of fasting
Changes in grelin
Time frame: 36 hours of fasting
changes in leptin, adiponektin, cortisol, catecholamine, glucagon, carbamide, palmitate
Time frame: 36 hours of fasting
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