Cited by 723Alzheimer's disease research and treatmentsDementia and Cognitive Impairment ResearchNeuroinflammation and Neurodegeneration Mechanisms

Insulin and insulin-like growth factor expression and function deteriorate with progression of Alzheimer’s disease: Link to brain reductions in acetylcholine

Rivera, Enrique J., Goldin, Alison, Fulmer, Noah, Tavares, Rose, Wands, Jack R., de la Monte, Suzanne M.·2005·Journal of Alzheimer s Disease

Abstract

Reduced glucose utilization and energy metabolism occur early in the course of Alzheimer's disease (AD) and correlate with impaired cognition. Glucose utilization and energy metabolism are regulated by insulin and insulin-like growth factor I (IGF-I), and correspondingly, studies have shown that cognitive impairment may be improved by glucose or insulin administration. Recently, we demonstrated significantly reduced levels of insulin and IGF-I polypeptide genes and their corresponding receptors in advanced AD relative to aged control brains. The abnormalities in gene expression were accompanied by impaired survival signaling downstream through PI3 kinase-Akt. The present work characterizes the abnormalities in insulin and IGF gene expression and receptor binding in brains with different Braak stage severities of AD. Realtime quantitative RT-PCR analysis of frontal lobe tissue demonstrated that increasing AD Braak Stage was associated with progressively reduced levels of mRNA corresponding to insulin, IGF-I, and IGF-II polypeptides and their receptors, tau, which is regulated by insulin and IGF-I, and the Hu D neuronal RNA binding protein. In contrast, progressively increased levels of amyloid beta protein precursor (AbetaPP), glial fibrillary acidic protein, and the IBA1/AIF1 microglial mRNA transcripts were detected with increasing AD Braak Stage. Impairments in growth factor and growth factor receptor expression and function were associated with increasing AD Braak stage dependent reductions in insulin, IGF-I, and IGF-II receptor binding, ATP levels, and choline acetyltransferase (ChAT) expression. Further studies demonstrated that: 1) ChAT expression increases with insulin or IGF-I stimulation; 2) ChAT is expressed in insulin and IGF-I receptor-positive cortical neurons; and 3) ChAT co-localization in insulin or IGF-I receptor-positive neurons is reduced in AD. Together, these data provide further evidence that AD represents a neuro-endocrine disorder that resembles a unique form of diabetes mellitus (? Type 3) and progresses with severity of neurodegeneration.

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Crossref · 10.3233/jad-2005-8304

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Authors
Rivera, E. J., Goldin, A., Fulmer, N., Tavares, R., Wands, J. R., & de la Monte, S. M.
Affiliations
  • Brown University (US)
  • Departments of Pathology and Medicine, Rhode Island Hospital and Brown Medical School, Providence, RI, USA
Venue
Journal of Alzheimer s Disease
Published
2005-12-05
Volume
8
Issue
3
Pages
247-268
ISSN
  • 1387-2877 (ISSN-L)
  • 1875-8908
OpenAlex
W1718410121
Cited by
723
References
71
Citations by year
2026: 16 · 2025: 24 · 2024: 32 · 2023: 35 · 2022: 56 · 2021: 45 · 2020: 43 · 2019: 52 · 2018: 46 · 2017: 29 · 2016: 43 · 2015: 44 · 2014: 51 · 2013: 42 · 2012: 43
FWCI
8.79
Type
journal article
Language
en
Open access
closed
Locations
  • Journal of Alzheimer s Disease (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Institutes of Health
  • National Institute on Alcohol Abuse and Alcoholism (AA12458, AA-02666, AA11931)
  • National Institute on Aging (P50 AG05128, P50AG005128)
  • National Center for Research Resources (P20RR 15578, P20RR015578)
Topics
  • Health Sciences › Medicine › Physiology › Alzheimer's disease research and treatments
  • Health Sciences › Medicine › Psychiatry and Mental health › Dementia and Cognitive Impairment Research
  • Life Sciences › Neuroscience › Neurology › Neuroinflammation and Neurodegeneration Mechanisms
Keywords
Alzheimer's disease, insulin
MeSH terms
Acetylcholine, Aged, Aged, 80 and over, Aging, Alzheimer Disease, Apolipoproteins E, Brain, Choline O-Acetyltransferase, Cognition Disorders, Female, Genotype, Glucose, Humans, Insulin, Insulin Resistance, Insulin-Like Growth Factor I, Male, RNA, Messenger, Gene Expression, Amyloid beta-Protein Precursor, tau Proteins, DNA Primers, Disease Progression, Reverse Transcriptase Polymerase Chain Reaction

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