Reviews in Endocrine and Metabolic Disorders

, Volume 8, Issue 2, pp 105–113

Metabolic programming in the pathogenesis of insulin resistance

Article

DOI: 10.1007/s11154-007-9050-4

Cite this article as:
Devaskar, S.U. & Thamotharan, M. Rev Endocr Metab Disord (2007) 8: 105. doi:10.1007/s11154-007-9050-4

Abstract

This review focuses on different animal models of nutrient perturbations, inclusive of restrictive and excessive states mimicking human situations during pregnancy and lactation that cause aberrations in the offspring. These aberrations consist of diminished insulin sensitivity in the presence of defective insulin production. These phenotypic changes are due to altered peripheral tissue post-insulin receptor signaling mechanisms and pancreatic β-islet insulin synthesis and secretion defects. While these changes during in utero or postnatal life serve as essential adaptations to overcome adverse conditions, they become maladaptive subsequently and set the stage for type 2 diabetes mellitus. Pregnancy leads to gestational diabetes with trans-generational propagation of the insulin resistant phenotype. This is in response to the metabolically aberrant maternal in utero environment, and tissue specific epigenetic perturbations that permanently alter expression of critical genes transmitted to future generations. These heritable aberrations consisting of altered DNA methylation and histone modifications remodel chromatin and affect transcription of key genes. Along with an altered in utero environment, these chromatin modifications contribute to the world-wide epidemic of type 2 diabetes mellitus, with nutrient excess dominating in developed and nutrient restriction in developing countries.

Keywords

Nutrient restrictionIntra-uterine growth restrictionEpigenetic regulationTrans-generational propagationType 2 diabetes mellitusDevelopmental origins of adult disease

Copyright information

© Springer Science+Business Media, LLC 2007

Authors and Affiliations

  • Sherin U. Devaskar
    • 1
    • 2
  • Manikkavasagar Thamotharan
    • 1
  1. 1.Division of Neonatology & Developmental Biology and the Neonatal Research Center, Department of PediatricsDavid Geffen School of Medicine UCLALos AngelesUSA
  2. 2.Los AngelesUSA