Cited by 263Pancreatic function and diabetesDiabetes and associated disordersDiabetes Treatment and Management

Diabetic Hyperglycemia: Link to Impaired Glucose Transport in Pancreatic β Cells

Unger, Roger H.·1991·Science

Abstract

Glucose uptake into pancreatic β cells by means of the glucose transporter GLUT-2, which has a high Michaelis constant, is essential for the normal insulin secretory response to hyperglycemia. In both autoimmune and nonautoimmune diabetes, this glucose transport is reduced as a consequence of down-regulation of the normal β-cell transporter. In autoimmune diabetes, circulating immunoglobulins can further impair this glucose transport by inhibiting functionally intact transporters. Insights into mechanisms of the unresponsiveness of β cells to hyperglycemia may improve the management and prevention of diabetes.

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Crossref · 10.1126/science.2006409

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  • GLUTs are involved in glucose sensing in pancreatic beta cells, and the GLUT isoforms in these insulin-secreting cells have a different glucose sensitivity threshold than those in fat and muscle cells.

    “GLUTs are also involved in glucose sensing in pancreatic beta cells, with the caveat that the GLUT isoforms present in these insulin-secreting cells possess a different glucose sensitivity threshold than those in fat and muscle cells ( 28-31 ).”
  • Parameters associated with glucose uptake in peripheral cells and maximum rates of production and utilisation were estimated from prior data.

    “the parameters associated to glucose uptake in peripheral cells, as well as maximum rates of production and utilisation, were estimated from ( 31, 43, 44 ).”
  • In pancreatic beta cells, GLUT1, GLUT2 and GLUT3 are involved in glucose sensing and possess different affinities for extracellular glucose compared to those in fat and muscle cells.

    “In pancreatic beta cells, GLUT1, GLUT2 and GLUT3 are involved in glucose sensing and possess different affinities for extracellular glucose compared to those in fat and muscle cells (26, 28).”

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Authors
Unger, R. H.
Affiliations
Center for Diabetes Research, Gifford Laboratories, Dallas, TX.
Corresponding author
Unger, Roger H.
Venue
Science
Published
1991-03-08
Volume
251
Issue
4998
Pages
1200-1205
ISSN
  • 0036-8075 (ISSN-L)
  • 1095-9203
OpenAlex
W2075542857
Cited by
263
References
71
Citations by year
2025: 1 · 2024: 1 · 2022: 3 · 2021: 3 · 2020: 6 · 2019: 3 · 2018: 6 · 2017: 6 · 2016: 3 · 2015: 6 · 2014: 5 · 2013: 4 · 2012: 6
FWCI
9.74
Type
journal article
Language
en
Open access
closed
Locations
  • Science (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Institutes of Health (5r37dk002700-34, 5p01dk042582-04)
  • National Institute of Diabetes and Digestive and Kidney Diseases (1-PO1-DK42582-01, 5-R37-DK02700-31)
Topics
  • Health Sciences › Medicine › Surgery › Pancreatic function and diabetes
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Diabetes and associated disorders
  • Health Sciences › Medicine › Endocrinology, Diabetes and Metabolism › Diabetes Treatment and Management
Keywords
diabetic hyperglycemia, pancreatic beta cells, glucose transport, GLUT2, insulin secretion, autoimmune diabetes, transporter downregulation, immunoglobulins
MeSH terms
Adult, Aged, Child, Diabetes Mellitus, Diabetes Mellitus, Type 1, Diabetes Mellitus, Type 2, Glucose, Humans, Hyperglycemia, Islets of Langerhans, Middle Aged, Models, Biological, Monosaccharide Transport Proteins

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