Cited by 91Alzheimer's disease research and treatmentsTraumatic Brain Injury and Neurovascular DisturbancesTraumatic Brain Injury Research

Brain Trauma in Aged Transgenic Mice Induces Regression of Established Aβ Deposits

Nakagawa, Yasushi, Reed, Lee, Nakamura, Michio, McIntosh, Tracy K., Smith, Douglas H., Saatman, Kathryn E., Raghupathi, Ramesh, Clemens, James +3 more·2000·Experimental Neurology

Abstract

Traumatic brain injury (TBI) increases susceptibility to Alzheimer's disease (AD), but it is not known if TBI affects the progression of AD. To address this question, we studied the neuropathological consequences of TBI in transgenic (TG) mice with a mutant human Abeta precursor protein (APP) mini-gene driven by a platelet-derived (PD) growth factor promoter resulting in overexpression of mutant APP (V717F), elevated brain Abeta levels, and AD-like amyloidosis. Since brain Abeta deposits first appear in 6-month-old TG (PDAPP) mice and accumulate with age, 2-year-old PDAPP and wild-type (WT) mice were subjected to controlled cortical impact (CCI) TBI or sham treatment. At 1, 9, and 16 weeks after TBI, neuron loss, gliosis, and atrophy were most prominent near the CCI site in PDAPP and WT mice. However, there also was a remarkable regression in the Abeta amyloid plaque burden in the hippocampus ipsilateral to TBI compared to the contralateral hippocampus of the PDAPP mice by 16 weeks postinjury. Thus, these data suggest that previously accumulated Abeta plaques resulting from progressive amyloidosis in the AD brain also may be reversible.

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Crossref · 10.1006/exnr.2000.7375

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  • CCI TBI in aged PDAPP mice caused a regression of established Aβ deposits.

    “Follow-up experiments revealed that CCI TBI in aged PDAPP mice caused a regression of established Aβ deposits (41).”
  • Several experimental studies have failed to show that TBI induces or worsens AD-related pathology, with some even reporting a reduction in post-injury Aβ accumulation in transgenic mice.

    “Finally, several experimental studies have failed to show that TBI induces or worsens AD-related pathology (38, 39) with some even reporting a reduction in post-injury Aβ accumulation in transgenic mice (40, 41).”

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Authors
Nakagawa, Y., Reed, L., Nakamura, M., McIntosh, T. K., Smith, D. H., Saatman, K. E., Raghupathi, R., Clemens, J., Saido, T. C., Lee, V. M.-Y., & Trojanowski, J. Q.
Affiliations
  • Kyushu University (JP)
  • University of Pennsylvania (US)
  • Eli Lilly (United States) (US)
  • RIKEN (JP)
Venue
Experimental Neurology
Publisher
Elsevier BV
Published
2000-05
Volume
163
Issue
1
Pages
244-252
ISSN
0014-4886 (ISSN-L)
OpenAlex
W2004117222
Cited by
91
References
0
Citations by year
2026: 3 · 2025: 1 · 2024: 2 · 2023: 3 · 2022: 3 · 2020: 4 · 2019: 5 · 2018: 6 · 2017: 3 · 2016: 3 · 2015: 5 · 2014: 1 · 2013: 3
FWCI
3.67
Type
journal article
Language
en
Open access
closed
Locations
  • Experimental Neurology (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Institute on Aging (P01AG011542, AG09215, P01AG009215, AG 11542)
  • National Institute of General Medical Sciences (R01GM034690, GM34690)
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, Alzheimer's disease, amyloid plaques, plaque regression, PDAPP mice, controlled cortical impact, amyloidosis, hippocampus, neuronal loss, gliosis, brain atrophy
MeSH terms
Aging, Alzheimer Disease, Animals, Brain Injuries, Female, Gliosis, Hippocampus, Humans, Immunohistochemistry, Mice, Transgenic, Mutation, Remission Induction, Amyloid beta-Peptides, Head Injuries, Closed, Cell Death, Disease Progression, In Situ Nick-End Labeling, Mice, Plaque, Amyloid

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