The Effect of Central Insulin on Insulin Sensitivity and Energy Metabolism

Summary

Insulin has a direct effect on the energy metabolism of the brain under basal conditions and has an effect on the hepatic glucose production, lipid metabolism and the secretion of various hormone. The effect of intranasal insulin on peripheral metabolism in humans supposedly is mediated by the vagus nerve. The purpose of this study is to determine whether central insulin influences the human peripheral insulin sensitivity of liver and muscle and whether vagus nerve stimulation can mimick this effect.

Timeline

Start

2011-08

Primary completion

2014-01

Completion

2014-06

Publications

• Background Frangos E, Ellrich J, Komisaruk BR. Non-invasive Access to the Vagus Nerve Central Projections via Electrical Stimulation of the External Ear: fMRI Evidence in Humans. Brain Stimul. 2015 May-Jun;8(3):624-36. doi: 10.1016/j.brs.2014.11.018. Epub 2014 Dec 6.
• Background Heni M, Wagner R, Kullmann S, Veit R, Mat Husin H, Linder K, Benkendorff C, Peter A, Stefan N, Haring HU, Preissl H, Fritsche A. Central insulin administration improves whole-body insulin sensitivity via hypothalamus and parasympathetic outputs in men. Diabetes. 2014 Dec;63(12):4083-8. doi: 10.2337/db14-0477. Epub 2014 Jul 15.
• Results Gancheva S, Koliaki C, Bierwagen A, Nowotny P, Heni M, Fritsche A, Haring HU, Szendroedi J, Roden M. Effects of intranasal insulin on hepatic fat accumulation and energy metabolism in humans. Diabetes. 2015 Jun;64(6):1966-75. doi: 10.2337/db14-0892. Epub 2015 Jan 9.

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Indications