Cited by 94Traumatic Brain Injury and Neurovascular DisturbancesAlzheimer's disease research and treatmentsTraumatic Brain Injury Research

Changes in Expression of Amyloid Precursor Protein and Interleukin-1β after Experimental Traumatic Brain Injury in Rats

Ciallella, John R., Ikonomovic, Milos D., Paljug, William R., Wilbur, Yetta I., Dixon, C. Edward, Kochanek, Patrick M., Marion, Donald W., DeKosky, Steven T.·2002·Journal of Neurotrauma

Abstract

There is increasing evidence linking neurodegenerative mechanisms in Alzheimer's disease (AD) and traumatic brain injury (TBI), including increased production of amyloid precursor protein (APP), and amyloid-beta (Abeta) peptide. In vitro data indicate that expression of APP may be regulated in part by the inflammatory cytokine IL-1beta. To further investigate the mechanisms involved, we measured APP and IL-1beta protein levels and examined immunohistochemical localization of APP in brain tissue from rats subjected to controlled cortical impact (CCI) injury. Animals were examined at time intervals ranging from 3 h to 4 weeks after TBI. The 24-h time point revealed a dramatic increase in APP immunoreactivity, detected with both N- and C-terminal antibodies, in the hippocampus and cortex ipsilateral to injury. This finding was sustained up to 3 days post-injury. At these early time points, APP increase was particularly robust in the white matter axonal tracts. By 14 days after injury, APP immunoreactivity was not significantly different from sham controls in cortex, but remained slightly elevated in hippocampus. Western blot data corroborated early increases in hippocampal and cortical APP in injured versus control animals. Despite profound APP changes, no Abeta deposits were observed at any time after injury. Hippocampal and cortical IL-1beta increases were even more robust, with IL-1beta levels peaking by 6 h post-injury and returning to baseline by 24-72 h. Our results demons…

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Crossref · 10.1089/089771502762300229

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  • A majority of rodent studies fail to show Aβ deposition after TBI in non-transgenic animals using CCI, FPI, and weight drop models.

    “a majority of rodent studies fail to show this association in non-transgenic animals using CCI, FPI, and weight drop models (121, 122, 124, 125, 135).”
  • APP expression increase after TBI has been replicated in multiple follow-up studies using CCI as well as midline and lateral FPI.

    “which has been replicated in multiple follow-up studies using CCI as well as midline and lateral FPI (124–126).”

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Authors
Ciallella, J. R., Ikonomovic, M. D., Paljug, W. R., Wilbur, Y. I., Dixon, C. E., Kochanek, P. M., Marion, D. W., & DeKosky, S. T.
Affiliations
  • University of Pittsburgh Medical Center (US)
  • University of Pittsburgh Medical Center, Pittsburgh, Pennsylvania
Venue
Journal of Neurotrauma
Published
2002-12
Volume
19
Issue
12
Pages
1555-1567
ISSN
  • 0897-7151 (ISSN-L)
  • 1557-9042
OpenAlex
W1964574311
Cited by
94
References
0
Citations by year
2026: 1 · 2025: 1 · 2024: 2 · 2022: 5 · 2021: 4 · 2020: 3 · 2019: 6 · 2018: 4 · 2017: 5 · 2016: 3 · 2015: 3 · 2014: 3 · 2013: 8 · 2012: 6
FWCI
1.99
Type
journal article
Language
en
Open access
closed
Locations
  • Journal of Neurotrauma (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Institute on Aging (AG 05-133, P50AG005133)
  • National Institute of Neurological Disorders and Stroke (NS-30318, NS07391, T32NS007391)
Topics
  • Health Sciences › Medicine › Neurology › Traumatic Brain Injury and Neurovascular Disturbances
  • Health Sciences › Medicine › Physiology › Alzheimer's disease research and treatments
  • Health Sciences › Medicine › Epidemiology › Traumatic Brain Injury Research
Keywords
amyloid precursor protein, IL-1β, traumatic brain injury, controlled cortical impact, amyloid-beta, hippocampus, cerebral cortex, neuroinflammation, Alzheimer's disease
MeSH terms
Animals, Brain Injuries, Disease Models, Animal, Immunohistochemistry, Interleukin-1, Peptide Fragments, Time Factors, Blotting, Western, Amyloid beta-Protein Precursor, Rats

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