Cited by 153Pancreatic function and diabetesDiabetes and associated disordersAlzheimer's disease research and treatments

Extensive islet amyloid formation is induced by development of Type II diabetes mellitus and contributes to its progression: pathogenesis of diabetes in a mouse model

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Höppener, J. W. M., Oosterwijk, C., Nieuwenhuis, M. G., Posthuma, G., Thijssen, J. H. H., Vroom, Th. M., Ahrén, B., Lips, C. J. M.·1999·Diabetologia

Abstract

Aims/hypothesis Type II (non-insulin-dependent) diabetes mellitus is a multifactorial disease in which pancreatic islet amyloid is a characteristic histopathological finding. Islet amyloid fibrils consist of the beta-cell protein "islet amyloid polypeptide" (IAPP)/"amylin". Unlike human IAPP (hIAPP), mouse IAPP cannot form amyloid. In previously generated transgenic mice, high expression of hIAPP as such did not induce islet amyloid formation. To further explore the potential diabetogenic role of amyloidogenic IAPP, we introduced a diabetogenic trait ("ob" mutation) in hIAPP transgenic mice.Methods Plasma concentrations of IAPP, insulin and glucose were determined at 3.5 (t1), 6 (t2), and 16-19 months of age (t3). At t3, the mice were killed and the pancreas was analysed (immuno)histochemically.Results In non-transgenic ob/ob mice, insulin resistance caused a compensatory increase in insulin production, normalizing the initial hyperglycaemia. In transgenic ob/ob mice, concurrent increase in hIAPP production resulted in extensive islet amyloid formation (more often and more extensive than in transgenic non-ob/ob mice), insulin insufficiency and persistent hyperglycaemia: At t3, plasma insulin levels in transgenic ob/ob mice with amyloid were fourfold lower than in non-transgenic ob/ob mice (p < 0.05), and plasma glucose concentrations in transgenic ob/ ob mice were almost twofold higher (p < 0.05). In addition, the degree of islet amyloid formation in ob/ob mice was positively correlated to the glucose:insulin ratio (r(s) = 0.53, p < 0.05).Conclusion/interpretation Islet amyloid is a secondary diabetogenic factor which can be both a consequence of insulin resistance and a cause of insulin insufficiency. [Diabetol

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Authors
Höppener, J. W. M., Oosterwijk, C., Nieuwenhuis, M. G., Posthuma, G., Thijssen, J. H. H., Vroom, T. M., Ahrén, B., & Lips, C. J. M.
Affiliations
Utrecht University (NL)
Venue
Diabetologia
Published
1999-03-19
Volume
42
Issue
4
Pages
427-434
ISSN
  • 0012-186X (ISSN-L)
  • 1432-0428
OpenAlex
W2085244013
Cited by
153
References
33
Citations by year
2026: 3 · 2025: 2 · 2024: 6 · 2023: 3 · 2022: 2 · 2021: 4 · 2020: 2 · 2019: 2 · 2018: 3 · 2017: 3 · 2016: 3 · 2015: 3 · 2014: 4 · 2013: 6 · 2012: 3
FWCI
8.77
Type
journal article
Language
en
Open access
Locations
  • Diabetologia (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • Universiteit Utrecht
  • Lunds Universitet
  • Malmö Högskola
  • Universitätsklinikum Tübingen
  • Medical Research Council
  • Medicinska Fakulteten, Lunds Universitet
Topics
  • Health Sciences › Medicine › Surgery › Pancreatic function and diabetes
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Diabetes and associated disorders
  • Health Sciences › Medicine › Physiology › Alzheimer's disease research and treatments
Keywords
islet amyloid, type 2 diabetes, amylin, insulin resistance, insulin deficiency, hyperglycemia, pancreatic beta cells, transgenic mice, diabetes pathogenesis, glucose/insulin ratio
MeSH terms
Amyloid, Animals, Blood Glucose, Diabetes Mellitus, Experimental, Diabetes Mellitus, Type 2, Female, Humans, Insulin, Islets of Langerhans, Male, Mice, Inbred C57BL, Mice, Obese, Mice, Transgenic, Point Mutation, Mice, Islet Amyloid Polypeptide

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