Hyperlipidemia Clinical Trial
Official title:
The Effect of Intranasal Insulin on Hepatic and Intestinal Triglyceride-rich Lipoprotein Production
This study compares the effect of insulin given as a nasal spray with a placebo. Insulin is a chemical messenger (hormone) in the body that controls fat (triglyceride) levels in the blood by controlling the amount of fat made by the liver and gut. Recent research suggests that insulin may work through the brain. The investigators hypothesize that preferential delivery of insulin into the brain, through nasal spray of the hormone, may affect the amount of fats made by the liver and gut.
Each subject will be studied twice 4-6 weeks apart in random order in this single blinded study. In study A they will receive a single dose of insulin 40 IU through nasal spray. In study B they will receive placebo. On the day of the study subjects will drink regular liquid nutrient formula to maintain a constant fed state. A pancreatic clamp (octreotide with replacement glucose, insulin and growth hormone) will be started at 7am. From 9am a regular infusion of a stable isotope tracer will be started together with nasal spray of either insulin/placebo. Regular blood samples will be drawn to assess lipoprotein kinetics. ;
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