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Upregulation of insulin receptor substrate-2 in pancreatic beta cells prevents diabetes.

The insulin receptor substrate-2 (Irs2) branch of the insulin/IGF signaling system coordinates peripheral insulin action and pancreatic beta cell function, so mice lacking Irs2 display similarities to humans with type 2 diabetes. Here we show that beta cell-specific expression of Irs2 at a low or a high level delivered a graded physiologic response that promoted beta cell growth, survival, and insulin secretion that prevented diabetes in Irs2-/- mice, obese mice, and streptozotocin-treated mice; and that upon transplantation, the transgenic islets cured diabetes more effectively than WT islets. Thus, pharmacological approaches that promote Irs2 expression in beta cells, especially specific cAMP agonists, could be rational treatments for beta cell failure and diabetes.

Pubmed ID: 14617753

Authors

  • Hennige AM
  • Burks DJ
  • Ozcan U
  • Kulkarni RN
  • Ye J
  • Park S
  • Schubert M
  • Fisher TL
  • Dow MA
  • Leshan R
  • Zakaria M
  • Mossa-Basha M
  • White MF

Journal

The Journal of clinical investigation

Publication Data

November 17, 2003

Associated Grants

  • Agency: NIDDK NIH HHS, Id: R01 DK55326-04

Mesh Terms

  • Animals
  • Apoptosis
  • Cell Size
  • Diabetes Mellitus, Experimental
  • Diabetes Mellitus, Type 2
  • Dietary Fats
  • Gene Expression Regulation
  • Humans
  • Insulin
  • Insulin Receptor Substrate Proteins
  • Insulin-Like Growth Factor I
  • Intracellular Signaling Peptides and Proteins
  • Islets of Langerhans
  • Islets of Langerhans Transplantation
  • Male
  • Mice
  • Mice, Inbred C57BL
  • Mice, Knockout
  • Mice, Transgenic
  • Phosphoproteins
  • Receptor, Insulin
  • Signal Transduction
  • Survival Rate
  • Up-Regulation