NeuroMolecular Medicine

, Volume 4, Issue 1–2, pp 59–72 | Cite as

Protein accumulation in traumatic brain injury

  • Douglas H. Smith
  • Kunihiro Uryu
  • Kathryn E. Saatman
  • John Q. Trojanowski
  • Tracy K. McIntosh


Traumatic brain injury (TBI) is one of the most devastating diseases in our society, accounting for a high percentage of mortality and disability. A major consequence of TBI is the rapid and long-term accumulation of proteins. This process largely reflects the interruption of axonal transport as a result of extensive axonal injury. Although many proteins are found accumulating after TBI, three have received particular attention; β-amyloid precursor protein and its proteolytic products, amyloid-β (Aβ) peptides, neurofilament proteins, and synuclein proteins. Massive coaccumulations of all of these proteins are found in damaged axons throughout the white matter after TBI. Additionally, these proteins form aggregates in other neuronal compartments and in brain parenchyma after brain trauma. Interestingly, TBI is also an epigenetic risk factor for developing neurodegenerative disorders, such as Alzheimer’s disease and Parkinson’s disease. Here, the similarities and differences of these accumulations with pathologies of neurodegenerative diseases will be explored. In addition, the potential deleterious roles of protein accumulations on functional outcome and progressive neurodegeneration following TBI will be examined.

Index Entries

Traumatic brain injury TBI, brain trauma diffuse axonal injury DAI, amyloid precursor protein APP, amyloid-β Aβ neurofilament proteins synuclein proteins accumulation 


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Copyright information

© Humana Press Inc 2003

Authors and Affiliations

  • Douglas H. Smith
    • 1
  • Kunihiro Uryu
    • 2
  • Kathryn E. Saatman
    • 1
  • John Q. Trojanowski
    • 2
    • 3
  • Tracy K. McIntosh
    • 1
    • 4
  1. 1.Department of NeurosurgeryUniversity of PennsylvaniaPhiladelphia
  2. 2.Center for Neurodegenerative Disease Research, Department of Pathology and Laboratory MedicineUniversity of PennsylvaniaPhiladelphia
  3. 3.Institute on AgingUniversity of PennsylvaniaPhiladelphia
  4. 4.Veterans Administration Medical CenterPhiladelphia

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