Deletion of the von Hippel–Lindau gene in pancreatic β cells impairs glucose homeostasis in mice

Cantley, J. et al. (2009) Deletion of the von Hippel–Lindau gene in pancreatic β cells impairs glucose homeostasis in mice. Journal of Clinical Investigation, 119(1), pp. 125-135. (doi: 10.1172/JCI26934)

[img]
Preview
Text
76229.pdf - Published Version

3MB

Abstract

Defective insulin secretion in response to glucose is an important component of the β cell dysfunction seen in type 2 diabetes. As mitochondrial oxidative phosphorylation plays a key role in glucose-stimulated insulin secretion (GSIS), oxygen-sensing pathways may modulate insulin release. The von Hippel–Lindau (VHL) protein controls the degradation of hypoxia-inducible factor (HIF) to coordinate cellular and organismal responses to altered oxygenation. To determine the role of this pathway in controlling glucose-stimulated insulin release from pancreatic β cells, we generated mice lacking Vhl in pancreatic β cells (βVhlKO mice) and mice lacking Vhl in the pancreas (PVhlKO mice). Both mouse strains developed glucose intolerance with impaired insulin secretion. Furthermore, deletion of Vhl in β cells or the pancreas altered expression of genes involved in β cell function, including those involved in glucose transport and glycolysis, and isolated βVhlKO and PVhlKO islets displayed impaired glucose uptake and defective glucose metabolism. The abnormal glucose homeostasis was dependent on upregulation of Hif-1α expression, and deletion of Hif1a in Vhl-deficient β cells restored GSIS. Consistent with this, expression of activated Hif-1α in a mouse β cell line impaired GSIS. These data suggest that VHL/HIF oxygen-sensing mechanisms play a critical role in glucose homeostasis and that activation of this pathway in response to decreased islet oxygenation may contribute to β cell dysfunction.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Selman, Professor Colin
Authors: Cantley, J., Selman, C., Shukla, D., Abramov, A.Y., Forstreuter, F., Esteban, M.A., Claret, M., Lingard, S.J., Clements, M., Harten, S.K., Asare-Anane, H., Batterham, R.L., Herrera, P.L., Persaud, S.J., Duchen, M.R., Maxwell, P.H., and Withers, D.J.
College/School:College of Medical Veterinary and Life Sciences > Institute of Biodiversity Animal Health and Comparative Medicine
Journal Name:Journal of Clinical Investigation
Publisher:Americal Society for Clinical Investigation
ISSN:0021-9738
ISSN (Online):1558-8238
Published Online:08 December 2008
Copyright Holders:Copyright © 2008 American Society for Clinical Investigation
First Published:First published in Journal of Clinical Investigation 119(1):125-135
Publisher Policy:Reproduced in accordance with the copyright policy of the publisher

University Staff: Request a correction | Enlighten Editors: Update this record