Cited by 81Alzheimer's disease research and treatmentsNeuroscience and Neuropharmacology ResearchNeuroinflammation and Neurodegeneration Mechanisms

Insulin rescues amyloid β-induced impairment of hippocampal long-term potentiation

Lee, Cheng-Che, Kuo, Yu-Min, Huang, Chiung-Chun, Hsu, Kuei-Sen·2009·Neurobiology of Aging

Abstract

Cerebral accumulation of amyloid beta-protein (Abeta) is generally believed to play a critical role in the pathogenesis of Alzheimer's disease (AD). Recent evidence suggests that Abeta-induced synaptic dysfunction is one of earliest pathogenic events observed in AD. Here we report that synthetic Abeta(1-42) strongly inhibited the induction of long-term potentiation (LTP) in the CA1 region of rat hippocampal slices. To ascertain which Abeta(1-42) sequences contribute to the impairment of LTP, we compared actions of several Abeta fragments and found that the sequence within 25-35 region of Abeta mainly contributes to the expression of LTP impairment. Importantly, we show that insulin and insulin-like growth factor-1 significantly inhibit Abeta oligomer formation, particularly dimers and trimers, and ameliorate the synthetic Abeta-induced suppression of LTP. Furthermore, dithiothreitol was found to be capable of significantly preventing the inhibitory effect of insulin on Abeta oligomer formation. In contrast, hemoglobin promotes Abeta oligomer formation and enhances Abeta-mediated inhibition of LTP induction. These results suggest that insulin may have utility in treating the earliest stages of Abeta-induced synaptic dysfunction in AD patients.

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Crossref · 10.1016/j.neurobiolaging.2007.06.014

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Authors
Lee, C.-C., Kuo, Y.-M., Huang, C.-C., & Hsu, K.-S.
Affiliations
National Cheng Kung University (TW)
Corresponding author
Hsu, Kuei-Sen
Venue
Neurobiology of Aging
Publisher
Elsevier BV
Published
2009-03
Volume
30
Issue
3
Pages
377-387
ISSN
0197-4580 (ISSN-L)
OpenAlex
W1993019632
Cited by
81
References
64
Citations by year
2025: 3 · 2024: 1 · 2023: 2 · 2022: 3 · 2021: 6 · 2020: 2 · 2019: 5 · 2018: 7 · 2017: 3 · 2016: 5 · 2015: 3 · 2014: 5 · 2013: 6 · 2012: 8
FWCI
3.12
Type
journal article
Language
en
Open access
closed
Locations
  • Neurobiology of Aging (publishedVersion)
  • PubMed (publishedVersion)
Funders
National Science Council
Topics
  • Health Sciences › Medicine › Physiology › Alzheimer's disease research and treatments
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
  • Life Sciences › Neuroscience › Neurology › Neuroinflammation and Neurodegeneration Mechanisms
Keywords
insulin, amyloid-beta, Alzheimer's disease, long-term potentiation, hippocampus, CA1, synaptic dysfunction, insulin-like growth factor I, amyloid-beta 42, dithiothreitol, hemoglobin
MeSH terms
Animals, Hippocampus, Insulin, Male, Organ Culture Techniques, Amyloid beta-Peptides, Rats, Sprague-Dawley, Long-Term Potentiation, Rats

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