Cited by 94Traumatic Brain Injury ResearchExtracellular vesicles in diseaseTraumatic Brain Injury and Neurovascular Disturbances

Higher exosomal phosphorylated tau and total tau among veterans with combat-related repetitive chronic mild traumatic brain injury

Kenney, Kimbra, Qu, Bao-Xi, Lai, Chen, Devoto, Christina, Motamedi, Vida, Walker, William C., Levin, Harvey S., Nolen, Tracy +4 more·2018·Brain Injury

Abstract

OBJECTIVE: The objective of the study is to measure plasma and exosomal levels of tau, phosphorylated tau (p-tau), and amyloid beta (Aβ) in Veterans with historical mild traumatic brain injury (mTBI) and chronic neuropsychological symptoms. METHODS: Tau, p-tau, Aβ40, and Aβ42 were measured by ultrasensitive immunoassay in plasma and exosomes from 195 Veterans enrolled in the Chronic Effects of Neurotrauma Consortium Multicenter Observational Study. Protein biomarkers were compared among groups with and without mTBI with loss of consciousness (LOC) or post-traumatic amnesia (PTA), and also in those with and without repetitive (≥3) mTBI (rTBI) compared to those with 0 (TBI-neg) and 1-2 mTBI. RESULTS: There were no differences in measures of plasma and exosomal protein levels among mTBI with LOC or PTA, mTBI with alteration of consciousness only or TBI-neg. Exosomal tau and exosomal p-tau were elevated in rTBI compared to those with 2 or fewer mTBIs and TBI-neg (p < 0.05). Elevations of exosomal tau and p-tau significantly correlated with post-traumatic and post-concussive symptoms, with exosomal tau also relating specifically to cognitive, affective, and somatic post-concussive symptoms (p < 0.05). CONCLUSION: rTBI is associated with elevations of exosomal p-tau and exosomal tau, suggesting that blood-based exosomes may provide a peripheral source of informative, centrally derived biomarkers in remote mTBI and that rTBI may contribute to chronic neuropsychological symptoms.

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Crossref · 10.1080/02699052.2018.1483530

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Authors
Kenney, K., Qu, B.-X., Lai, C., Devoto, C., Motamedi, V., Walker, W. C., Levin, H. S., Nolen, T., Wilde, E. A., Diaz-Arrastia, R., Gill, J., & the CENC Multisite Observational Study Investigators
Affiliations
  • Uniformed Services University of the Health Sciences (US)
  • National Institutes of Health (US)
  • Virginia Commonwealth University (US)
  • Michael E. DeBakey VA Medical Center (US)
  • RTI International (US)
  • University of Pennsylvania (US)
Corresponding author
Kenney, Kimbra
Venue
Brain Injury
Published
2018-06-11
Volume
32
Issue
10
Pages
1276-1284
ISSN
  • 0269-9052 (ISSN-L)
  • 1362-301X
OpenAlex
W2808596369
Cited by
94
References
58
Citations by year
2026: 4 · 2025: 4 · 2024: 11 · 2023: 14 · 2022: 16 · 2021: 23 · 2020: 12 · 2019: 8 · 2018: 2
FWCI
8.82
Type
journal article
Language
en
Open access
closed
Locations
  • Brain Injury (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • U.S. Department of Defense (CENC W81XWH-13-2-0095)
  • U.S. Department of Veterans Affairs (CENC Award I01 CX001135)
Topics
  • Health Sciences › Medicine › Epidemiology › Traumatic Brain Injury Research
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Extracellular vesicles in disease
  • Health Sciences › Medicine › Neurology › Traumatic Brain Injury and Neurovascular Disturbances
Keywords
repetitive mild traumatic brain injury, phosphorylated tau, amyloid-beta, plasma biomarkers, exosomes, combat-related brain injury, veterans, post-concussion symptoms, post-traumatic amnesia, loss of consciousness, blood-based biomarkers
MeSH terms
Adult, Brain Concussion, Cognition Disorders, Cross-Sectional Studies, Female, Humans, Male, Middle Aged, Peptide Fragments, Phosphorylation, Surveys and Questionnaires, Veterans, Amyloid beta-Peptides, tau Proteins, Mood Disorders, Brain Injury, Chronic

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