Cited by 144Traumatic Brain Injury ResearchAlzheimer's disease research and treatmentsTraumatic Brain Injury and Neurovascular Disturbances

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Is phosphorylated tau unique to chronic traumatic encephalopathy? Phosphorylated tau in epileptic brain and chronic traumatic encephalopathy

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Abstract

Repetitive traumatic brain injury (rTBI) is one of the major risk factors for the abnormal deposition of phosphorylated tau (PT) in the brain and chronic traumatic encephalopathy (CTE). CTE and temporal lobe epilepsy (TLE) affect the limbic system, but no comparative studies on PT distribution in TLE and CTE are available. It is also unclear whether PT pathology results from repeated head hits (rTBI). These gaps prevent a thorough understanding of the pathogenesis and clinical significance of PT, limiting our ability to develop preventative and therapeutic interventions. We quantified PT in TLE and CTE to unveil whether a history of rTBI is a prerequisite for PT accumulation in the brain. Six postmortem CTE (mean 73.3 years) and age matched control samples were compared to 19 surgically resected TLE brain specimens (4 months-58 years; mean 27.6 years). No history of TBI was present in TLE or control; all CTE patients had a history of rTBI. TLE and CTE brain displayed increased levels of PT as revealed by immunohistochemistry. No age-dependent changes were noted, as PT was present as early as 4 months after birth. In TLE and CTE, cortical neurons, perivascular regions around penetrating pial vessels and meninges were immunopositive for PT; white matter tracts also displayed robust expression of extracellular PT organized in bundles parallel to venules. Microscopically, there were extensive tau-immunoreactive neuronal, astrocytic and degenerating neurites throughout the brain. In CTE perivascular tangles were most prominent. Overall, significant differences in staining intensities were found between CTE and control (P<0.01) but not between CTE and TLE (P=0.08). pS199 tau analysis showed that CTE had the most high molecular weight tangle-associated tau, whereas epileptic brain contained low molecular weight tau. Tau deposition may not be specific to rTBI since TLE recapitulated most of the pathological features of CTE.

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Research works printed but not linked: 2

  1. Goldstein, 2012, Chronic traumatic encephalopathy in blast-exposed military veterans and a blast neurotrauma mouse model, Sci.Transl.Med., 4, 134ra60, 10.1126/scitranslmed.3003716 · DOI · Paper page
  2. McKee, 2009, Chronic traumatic encephalopathy in athletes: progressive tauopathy after repetitive head injury, J. Neuropathol. Exp. Neurol., 68, 709, 10.1097/NEN.0b013e3181a9d503 · DOI · Paper page

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Metadata

Authors
Puvenna, V., Engeler, M., Banjara, M., Brennan, C., Schreiber, P., Dadas, A., Bahrami, A., Solanki, J., Bandyopadhyay, A., Morris, J. K., Bernick, C., Ghosh, C., Rapp, E., Bazarian, J. J., & Janigro, D.
Affiliations
  • Cleveland Clinic Lerner College of Medicine (US)
  • Brandeis University (US)
  • University of Pittsburgh (US)
  • The Ohio State University (US)
  • Baldwin Wallace University (US)
  • Emory University (US)
  • Cleveland Clinic (US)
  • University of Rochester Medicine (US)
Corresponding author
Janigro, Damir
Venue
Brain Research
Publisher
Elsevier BV
Published
2016-01
Volume
1630
Pages
225-240
ISSN
0006-8993 (ISSN-L)
OpenAlex
W2140341262
Cited by
144
References
21
Citations by year
2026: 7 · 2025: 5 · 2024: 7 · 2023: 13 · 2022: 16 · 2021: 17 · 2020: 11 · 2019: 27 · 2018: 16 · 2017: 17 · 2016: 7
FWCI
10.45
Type
journal article
Language
en
Open access
Locations
  • Brain Research (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
Funders
Boston University Center
Topics
  • Health Sciences › Medicine › Clinical Neurology › Traumatic Brain Injury Research
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Alzheimer's disease research and treatments
  • Health Sciences › Medicine › Clinical Neurology › Traumatic Brain Injury and Neurovascular Disturbances
Keywords
phosphorylated tau, chronic traumatic encephalopathy, temporal lobe epilepsy, repetitive traumatic brain injury, tau pathology, tau tangles, limbic system, postmortem brain
MeSH terms
Adolescent, Adult, Aged, Aged, 80 and over, Brain, Child, Child, Preschool, Enzyme-Linked Immunosorbent Assay, Epilepsy, Female, Humans, Immunohistochemistry, Infant, Male, Middle Aged, Phosphorylation, tau Proteins, Brain Injury, Chronic, Young Adult

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