Cited by 108Alzheimer's disease research and treatmentsDementia and Cognitive Impairment ResearchAdipokines, Inflammation, and Metabolic Diseases

Insulin resistance contributes to aberrant stress responses in the Tg2576 mouse model of Alzheimer's disease

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PEDERSEN, W, FLYNN, E·2004·Neurobiology of Disease

Abstract

We previously reported aberrant stress responses and impaired glucose tolerance in transgenic Tg2576 mice, a model of Alzheimer's disease (AD). Here we report that by 8 months of age, Tg2576 mice had lower basal serum insulin concentrations and exhibited a delayed insulin-induced reduction in blood glucose levels relative to wild-type mice. However, the basal levels of blood glucose and percent glycosylated hemoglobin (%HbA1c) were similar between the two groups of mice. While the basal levels of serum corticosterone were similar between Tg2576 and wild-type mice, an overnight fasting caused a greater rise in serum corticosterone levels and an excessive reduction in serum insulin concentrations in the transgenics. At 9 months of age, we began administering Tg2576 mice rosiglitazone, an agonist of peroxisome proliferator-activated receptor-gamma that increases peripheral insulin sensitivity, and after 6 weeks of administration the Tg2576 mice had the same response to insulin and increase in serum corticosterone levels after an overnight fast as did wild-type mice. By 13 months of age, untreated Tg2576 mice had become hyperinsulinemic, in contrast to Tg2576 mice administered rosiglitazone for 4 months where the serum insulin concentrations were maintained at levels observed in wild-type mice. These results provide evidence for a relationship between insulin resistance, impaired regulation of insulin and glucose levels, and aberrant stress responses in Tg2576 mice.

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Crossref · 10.1016/j.nbd.2004.08.003

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Authors
PEDERSEN, W., & FLYNN, E.
Affiliations
CHI Health Creighton University Medical Center - Bergan Mercy (US)
Corresponding author
PEDERSEN, W
Venue
Neurobiology of Disease
Publisher
Elsevier BV
Published
2004-12
Volume
17
Issue
3
Pages
500-506
ISSN
0969-9961 (ISSN-L)
OpenAlex
W2043841065
Cited by
108
References
36
Citations by year
2025: 3 · 2024: 2 · 2023: 4 · 2022: 2 · 2021: 3 · 2020: 2 · 2019: 2 · 2018: 5 · 2017: 1 · 2016: 4 · 2015: 5 · 2014: 5 · 2013: 7 · 2012: 13
FWCI
3.66
Type
journal article
Language
en
Open access
Locations
  • Neurobiology of Disease (publishedVersion)
  • PubMed (publishedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
Funders
Creighton University
Topics
  • Health Sciences › Medicine › Physiology › Alzheimer's disease research and treatments
  • Health Sciences › Medicine › Psychiatry and Mental health › Dementia and Cognitive Impairment Research
  • Health Sciences › Medicine › Epidemiology › Adipokines, Inflammation, and Metabolic Diseases
Keywords
insulin resistance, Alzheimer's disease, Tg2576 mice, stress response, corticosterone, glucose tolerance, hyperinsulinemia, rosiglitazone, PPARγ agonists, insulin sensitivity
MeSH terms
Rosiglitazone, Alzheimer Disease, Animals, Blood Glucose, Disease Models, Animal, Glycated Hemoglobin, Humans, Hypoglycemic Agents, Insulin, Insulin Resistance, Mice, Transgenic, Reference Values, Stress, Physiological, Thiazolidinediones, Mice

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