Cited by 1,214Alzheimer's disease research and treatmentsDementia and Cognitive Impairment ResearchNeuroinflammation and Neurodegeneration Mechanisms

Axonopathy and Transport Deficits Early in the Pathogenesis of Alzheimer’s Disease

Stokin, Gorazd B., Lillo, Concepción, Falzone, Tomás L., Brusch, Richard G., Rockenstein, Edward, Mount, Stephanie L., Raman, Rema, Davies, Peter +3 more·2005·Science

Abstract

We identified axonal defects in mouse models of Alzheimer's disease that preceded known disease-related pathology by more than a year; we observed similar axonal defects in the early stages of Alzheimer's disease in humans. Axonal defects consisted of swellings that accumulated abnormal amounts of microtubule-associated and molecular motor proteins, organelles, and vesicles. Impairing axonal transport by reducing the dosage of a kinesin molecular motor protein enhanced the frequency of axonal defects and increased amyloid-beta peptide levels and amyloid deposition. Reductions in microtubule-dependent transport may stimulate proteolytic processing of beta-amyloid precursor protein, resulting in the development of senile plaques and Alzheimer's disease.

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Crossref · 10.1126/science.1105681

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  • Disruption of fast axonal transport results in focal swellings filled with organelles in AD transgenic models, resembling Wallerian degeneration.

    “Another important factor might be the disruption of fast axonal transport, resulting in focal swellings filled with various organelles, as seen in the vicinity but also distant from plaques in several AD transgenic models [27,28,29,30], resembling Wallerian degeneration [31].”
  • Tg-swAPP Prp commonly exhibited axonal blockages that were not immunoreactive for ChAT and occasionally displayed electron dense axoplasm reminiscent of axonal degeneration.

    “As previously reported (7), Tg-swAPP Prp commonly exhibited axonal blockages that were not immunoreactive for ChAT and occasionally displayed electron dense axoplasm reminiscent of axonal degeneration”
  • Overexpression of WT APP or APP bearing FAD mutations in Drosophila and mice can cause impaired axonal transport and axonal defects.

    “Intriguingly, recent work revealed that overexpression of WT APP or APP bearing FAD mutations in Drosophila and mice can cause impaired axonal transport and axonal defects (7,8,29,30).”
  • Single transgenic Tg-swAPP Prp mice had a significantly higher percentage of ChAT-IR fibers with varicosities having diameters between 2.7 and 3.6 mm, 3.6 and 4.5 mm and larger than 4.5 mm compared with WT littermates in both genetic backgrounds examined.

    “As reported previously (7), single transgenic Tg-swAPP Prp mice had a significantly higher percentage of choline acetyltransferase-immunoreactive (ChAT-IR) fibers with varicosities having diameters between 2.7 and 3.6 mm, 3.6 and 4.5 mm and larger than 4.5 mm compared with WT littermates in both genetic backgrounds examined”
  • Formation of these defects was enhanced by genetic reductions in kinesin-1 in Drosophila and in mice, where increased Aβ42/Aβ40 ratios and enhanced amyloid deposition were also observed.

    “Formation of these defects was shown to be enhanced by genetic reductions in kinesin-1 in Drosophila (29,30) and in mice, where increased Ab42/Ab40 ratios and enhanced amyloid deposition were also observed (7,57).”

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Authors
Stokin, G. B., Lillo, C., Falzone, T. L., Brusch, R. G., Rockenstein, E., Mount, S. L., Raman, R., Davies, P., Masliah, E., Williams, D. S., & Goldstein, L. S. B.
Affiliations
  • Howard Hughes Medical Institute (US)
  • Howard Hughes Medical Institute and Department of Cellular and Molecular Medicine, School of Medicine, University of California San Diego (UCSD), 9500 Gilman Drive, La Jolla, CA 92093, USA.
Corresponding author
Goldstein, Lawrence S. B.
Venue
Science
Published
2005-02-25
Volume
307
Issue
5713
Pages
1282-1288
ISSN
  • 0036-8075 (ISSN-L)
  • 1095-9203
OpenAlex
W2171776741
Cited by
1,214
References
38
Citations by year
2026: 28 · 2025: 37 · 2024: 47 · 2023: 37 · 2022: 43 · 2021: 54 · 2020: 47 · 2019: 45 · 2018: 46 · 2017: 47 · 2016: 59 · 2015: 51 · 2014: 61 · 2013: 58 · 2012: 81
FWCI
48.47
Type
journal article
Language
en
Open access
closed
Locations
  • Science (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Institutes of Health (5p30ey012598-05)
  • National Institute on Aging (P50AG005131)
  • National Eye Institute (EY13408, R01EY013408, EY 12598, R01EY007042)
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, axonal swellings, kinesin, microtubule-associated proteins, molecular motors, amyloid-beta, amyloid deposition, amyloid plaques, mouse model
MeSH terms
Aged, Aged, 80 and over, Alzheimer Disease, Animals, Axons, Axonal Transport, Brain, Cells, Cultured, Female, Hippocampus, Humans, Male, Mice, Inbred C3H, Mice, Inbred C57BL, Microtubule-Associated Proteins, Neurons, Time Factors, Organelles, Amyloid beta-Peptides, Kinesins, Amyloid beta-Protein Precursor, Basal Nucleus of Meynert, Cytoplasmic Vesicles, Mice, Plaque, Amyloid

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