Cited by 103Alzheimer's disease research and treatmentsTraumatic Brain Injury and Neurovascular DisturbancesTraumatic Brain Injury Research

Experimental traumatic brain injury induces rapid aggregation and oligomerization of amyloid-beta in an Alzheimer’s disease mouse model

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Washington, Patricia M., Morffy, Nicholas, Parsadanian, Maia, Zapple, David N., Burns, Mark P.·2014·Journal of Neurotrauma

Abstract

Soluble amyloid-beta (Aβ) oligomers are hypothesized to be the pathogenic species in Alzheimer's disease (AD), and increased levels of oligomers in the brain subsequent to traumatic brain injury (TBI) may exacerbate secondary injury pathways and underlie increased risk of developing AD in later life. To determine whether TBI causes Aβ aggregation and oligomerization in the brain, we exposed triple transgenic AD model mice to controlled cortical impact injury and measured levels of soluble, insoluble, and oligomeric Aβ by enzyme-linked immunosorbent assay (ELISA) at 1, 3, and 7 days postinjury. TBI rapidly increased levels of both soluble and insoluble Aβ40 and Aβ42 in the injured cortex at 1 day postinjury. We confirmed previous findings that identified damaged axons as a major site of Aβ accumulation using both immunohistochemistry and biochemistry. We also report that soluble Aβ oligomers were significantly increased in the injured cortex, as demonstrated by both ELISA and Western blot. Interestingly, the mouse brain is able to rapidly clear trauma-induced Aβ, with both soluble and insoluble Aβ species returning to sham levels by 7 days postinjury. In conclusion, we demonstrate that TBI causes acute accumulation and aggregation of Aβ in the brain, including the formation of low- and high-molecular-weight Aβ oligomers. The formation and aggregation of Aβ into toxic species acutely after injury may play a role in secondary injury cascades after trauma and, chronically, may contribute to increased risk of developing AD in later life.

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Crossref · 10.1089/neu.2013.3017

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  • Many animal studies show increased production and accumulation of amyloid precursor protein (APP), Aβ, and pathological tau following TBI.

    “Second, many animal studies show increased production and accumulation of amyloid precursor protein (APP), Aβ, and pathological tau following TBI (16, 21–28).”

    From The Inflammatory Continuum of Traumatic Brain Injury and Alzheimer’s Disease (2018) · cites this paper as [23]

    The Results (page not available in our copy) report increased APP processing and Aβ production after TBI in mice, and the Discussion reports increased soluble and insoluble Aβ. The paper does not report increased production or accumulation of APP itself, or a finding about pathological tau; the tau mention found is in a reference title. (LLM, conf=0.86)

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  • CCI TBI increased soluble and insoluble cortical Aβ40 and Aβ42 within 24 h after injury in the 3xTg mouse model of AD, but both soluble and insoluble Aβ returned to sham levels by 7 DPI.

    “While CCI TBI increased soluble and insoluble cortical Aβ40 and Aβ42 within 24 h after injury, both soluble and insoluble Aβ returned to sham levels by 7 DPI (23).”

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Authors
Washington, P. M., Morffy, N., Parsadanian, M., Zapple, D. N., & Burns, M. P.
Affiliations
Georgetown University Medical Center (US)
Corresponding author
Burns, Mark P.
Venue
Journal of Neurotrauma
Published
2014-01
Volume
31
Issue
1
Pages
125-134
ISSN
  • 0897-7151 (ISSN-L)
  • 1557-9042
OpenAlex
W2055079309
Cited by
103
References
61
Citations by year
2026: 5 · 2025: 4 · 2024: 6 · 2023: 11 · 2022: 6 · 2021: 7 · 2020: 8 · 2019: 11 · 2018: 8 · 2017: 11 · 2016: 13 · 2015: 9 · 2014: 4
FWCI
6.03
Type
journal article
Language
en
Open access
Locations
  • Journal of Neurotrauma (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • Georgetown University (T32NS041218)
  • Cosmos Club Foundation
  • National Institute of Neurological Disorders and Stroke (R03NS067417, R01NS081068, T32NS041218)
Topics
  • Health Sciences › Medicine › Physiology › Alzheimer's disease research and treatments
  • Health Sciences › Medicine › Neurology › Traumatic Brain Injury and Neurovascular Disturbances
  • Health Sciences › Medicine › Epidemiology › Traumatic Brain Injury Research
Keywords
traumatic brain injury, amyloid-beta, amyloid-beta oligomers, Alzheimer's disease, controlled cortical impact, triple transgenic mouse model, axonal injury, amyloid-beta clearance, secondary injury, cortical injury
MeSH terms
Alzheimer Disease, Animals, Brain, Brain Injuries, Disease Models, Animal, Mice, Transgenic, Amyloid beta-Peptides, Mice

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