Cited by 743Pancreatic function and diabetesDiabetes Treatment and ManagementEndoplasmic Reticulum Stress and Disease

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Minireview: Secondary β-Cell Failure in Type 2 Diabetes—A Convergence of Glucotoxicity and Lipotoxicity

Poitout, Vincent, Robertson, R. Paul·2002·Endocrinology

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Abstract

Chronic hyperglycemia and hyperlipidemia can exert deleterious effects on beta-cell function, respectively referred to as glucotoxicity and lipotoxicity. Over time, both contribute to the progressive deterioration of glucose homeostasis characteristic of type 2 diabetes. The mechanisms of glucotoxicity involve several transcription factors and are, at least in part, mediated by generation of chronic oxidative stress. Lipotoxicity is probably mediated by accumulation of a cytosolic signal derived from the fatty acid esterification pathway. Our view that hyperglycemia is a prerequisite for lipotoxicity is supported by several recent studies performed in our laboratories. First, prolonged in vitro exposure of isolated islets to fatty acids decreases insulin gene expression in the presence of high glucose concentrations only, and glucose is rate-limiting for the incorporation of fatty acids into neutral lipids. Second, normalization of blood glucose in Zucker diabetic fatty rats prevents accumulation of triglycerides and impairment of insulin gene expression in islets, whereas normalization of plasma lipid levels is without effect. Third, high-fat feeding in Goto-Kakizaki rats significantly impairs glucose-induced insulin secretion in vitro, whereas a similar diet has no effect in normoglycemic animals. We propose that chronic hyperglycemia, independent of hyperlipidemia, is toxic for beta-cell function, whereas chronic hyperlipidemia is deleterious only in the context of concomitant hyperglycemia.

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Role of apoptosis in failure of beta-cell mass compensation for insulin resistance and beta-cell defects in the male Zucker diabetic fatty rat
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Endoplasmic Reticulum Stress in theβ-Cell Pathogenesis of Type 2 Diabetes
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Leisure-time physical activity and type 2 diabetes during a 28 year follow-up in twins
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“As chronic exposure of pancreatic beta cells to elevated glucose and fatty acid levels may impair their function and lead to type 2 diabetes [34, 35], both endurance and resistance exercise training has been proven to have effects on various mechanisms that enhance the insulin sensitivity of skeletal muscles [36] and…”
Background
The STING-IRF3 pathway is involved in lipotoxic injury of pancreatic β cells in type 2 diabetes
Hu, H. Q., Qiao, J., Liu, F. Q., Wang, J. B., Sha, S., He, Q., Cui, C., Song, J., Zang, N., Wang, L. S., et al. (2020) · Molecular and Cellular Endocrinology · doi:10.1016/j.mce.2020.110890 · Cited by 67

Authors: Poitout, V., & Robertson, R. P.
Affiliations: University of Washington (US)
Corresponding author: Poitout, Vincent
ORCID: Poitout, Vincent
Robertson, R. Paul
Venue: Endocrinology
Publisher: The Endocrine Society
Published: 2002-02
Volume: 143
Issue: 2
Pages: 339-342
ISSN: 0013-7227 (ISSN-L)
1945-7170
DOI: 10.1210/endo.143.2.8623
OpenAlex: W1971701221
Cited by: 743
References: 0
Citations by year: 2026: 6 · 2025: 9 · 2024: 9 · 2023: 11 · 2022: 13 · 2021: 24 · 2020: 23 · 2019: 16 · 2018: 22 · 2017: 24 · 2016: 20 · 2015: 49 · 2014: 41 · 2013: 41 · 2012: 45
FWCI: 37.55
Type: journal article
Language: en
Open access: closed
Locations: Endocrinology (publishedVersion)
PubMed (publishedVersion)
Funders: National Institute of Diabetes and Digestive and Kidney Diseases (R-01-DK-38325, R01 DK 58096)
Topics: Health Sciences › Medicine › Endocrinology, Diabetes and Metabolism › Pancreatic function and diabetes
Health Sciences › Medicine › Endocrinology, Diabetes and Metabolism › Diabetes Treatment and Management
Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Endoplasmic Reticulum Stress and Disease
Keywords: type 2 diabetes, beta-cell dysfunction, glucotoxicity, lipotoxicity, hyperglycemia, hyperlipidemia, oxidative stress, transcription factors, fatty acid esterification, insulin gene expression, glucose-stimulated insulin secretion, triglyceride accumulation, high-fat diet, islets
MeSH terms: Animals, Chronic Disease, Diabetes Mellitus, Type 2, Humans, Hyperglycemia, Hyperlipidemias, Islets of Langerhans

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Minireview: Secondary β-Cell Failure in Type 2 Diabetes—A Convergence of Glucotoxicity and Lipotoxicity

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