Cited by 78Pancreatic function and diabetesEndoplasmic Reticulum Stress and DiseaseDiabetes Treatment and Management

β-Cell failure in type 2 diabetes

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Leibowitz, Gil, Kaiser, Nurit, Cerasi, Erol·2011·Journal of Diabetes Investigation

Abstract

Type 2 diabetic patients are insulin resistant as a result of obesity and a sedentary lifestyle. Nevertheless, it has been known for the past five decades that insulin response to nutrients is markedly diminished in type 2 diabetes. There is now a consensus that impaired glucose regulation cannot develop without insulin deficiency. First-phase insulin response to glucose is lost very early in the development of type 2 diabetes. Several prospective studies have shown that impaired insulin response to glucose is a predictor of future impaired glucose tolerance (IGT) and type 2 diabetes. Recently discovered type 2 diabetes-risk gene variants influence β-cell function, and might represent the molecular basis for the low insulin secretion that predicts future type 2 diabetes. We believe type 2 diabetes develops on the basis of normal but 'weak'β-cells unable to cope with excessive functional demands imposed by overnutrition and insulin resistance. Several laboratories have shown a reduction in β-cell mass in type 2 diabetes and IGT, whereas others have found modest reductions and most importantly, a large overlap between β-cell masses of diabetic and normoglycemic subjects. Therefore, at least initially, the β-cell dysfunction of type 2 diabetes seems more functional than structural. However, type 2 diabetes is a progressive disorder, and animal models of diabetes show β-cell apoptosis with prolonged hyperglycemia/hyperlipemia (glucolipotoxicity). β-Cells exposed in vitro to glucolipotoxic conditions show endoplasmic reticulum (ER) and oxidative stress. ER stress mechanisms might participate in the adaptation of β-cells to hyperglycemia, unless excessive. β-Cells are not deficient in anti-oxidant defense, thioredoxin playing a major role. Its inhibitor, thioredoxin-interacting protein (TXNIP), might be important in leading to β-cell apoptosis and type 2 diabetes. These topics are intensively investigated and might lead to novel therapeutic approaches. (J Diabetes Invest, doi: 10.1111/j.2040-1124.2010.00094.x, 2011).

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  1. [46]Gepts W. Die histopathologischen Veränderungen der Langerhansschen Inseln und ihre Bedeutung in der Frage des Pathogenese des menschlichen Diabetes. Endokrinologie 1958; 36: 185– 211 13586229

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Authors
Leibowitz, G., Kaiser, N., & Cerasi, E.
Affiliations
Hebrew University of Jerusalem (IL)
Corresponding author
Cerasi, Erol
Venue
Journal of Diabetes Investigation
Publisher
Wiley
Published
2011-01-21
Volume
2
Issue
2
Pages
82-91
ISSN
2040-1116 (ISSN-L)
OpenAlex
W1710400459
Cited by
78
References
91
Citations by year
2026: 3 · 2025: 2 · 2024: 8 · 2023: 2 · 2022: 1 · 2021: 7 · 2020: 10 · 2019: 6 · 2018: 3 · 2017: 11 · 2016: 10 · 2015: 6 · 2014: 2 · 2013: 4 · 2012: 3
FWCI
0.52
Type
journal article
Language
en
Open access
Locations
  • Journal of Diabetes Investigation (publishedVersion)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Health Sciences › Medicine › Surgery › Pancreatic function and diabetes
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Endoplasmic Reticulum Stress and Disease
  • Health Sciences › Medicine › Endocrinology, Diabetes and Metabolism › Diabetes Treatment and Management
Keywords
beta-cell dysfunction, type 2 diabetes, insulin resistance, impaired glucose tolerance, first-phase insulin response, beta-cell mass, glucolipotoxicity, beta-cell apoptosis, endoplasmic reticulum stress, oxidative stress, thioredoxin, TXNIP, genetic risk variants

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