Cited by 30Amyotrophic Lateral Sclerosis ResearchAlzheimer's disease research and treatmentsDementia and Cognitive Impairment Research

Concurrent tau pathologies in frontotemporal lobar degeneration with TDP‐43 pathology

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Koga, Shunsuke, Zhou, Xiaolai, Murakami, Aya, Fernandez De Castro, Cristhoper, Baker, Matthew C., Rademakers, Rosa, Dickson, Dennis W.·2022·Neuropathology and Applied Neurobiology

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Abstract

Aims: Accumulating evidence suggests that patients with frontotemporal lobar degeneration (FTLD) can have pathologic accumulation of multiple proteins, including tau and TDP‐43. This study aimed to determine the frequency and characteristics of concurrent tau pathology in FTLD with TDP‐43 pathology (FTLD‐TDP). Methods: The study included 146 autopsy‐confirmed cases of FTLD‐TDP and 55 cases of FTLD‐TDP with motor neuron disease (FTLD‐MND). Sections from the basal forebrain were screened for tau pathology with phosphorylated‐tau immunohistochemistry. For cases with tau pathology on the screening section, additional brain sections were studied to establish a diagnosis. Genetic analysis of C9orf72 , GRN and MAPT was performed on select cases. Results: We found 72 cases (36%) with primary age‐related tauopathy (PART), 85 (42%) with ageing‐related tau astrogliopathy (ARTAG), 45 (22%) with argyrophilic grain disease (AGD) and 2 cases (1%) with corticobasal degeneration (CBD). Patients with ARTAG or AGD were significantly older than those without these comorbidities. One of the patients with FTLD‐TDP and CBD had C9orf72 mutation and relatively mild tau pathology, consistent with incidental CBD. Conclusion: The coexistence of TDP‐43 and tau pathologies was relatively common, particularly PART and ARTAG. Although rare, patients with FTLD can have multiple neurodegenerative proteinopathies. The absence of TDP‐43‐positive astrocytic plaques may suggest that CBD and FTLD‐TDP were independent disease processes in the two patients with both tau and TDP‐43 pathologies. It remains to be determined if mixed cases represent a unique disease process or two concurrent disease processes in an individual.

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Authors
Koga, S., Zhou, X., Murakami, A., Fernandez De Castro, C., Baker, M. C., Rademakers, R., & Dickson, D. W.
Affiliations
  • Mayo Clinic (US)
  • Department of Neuroscience Mayo Clinic Jacksonville Florida USA
  • University of Antwerp (BE)
Corresponding author
Dickson, Dennis W.
Venue
Neuropathology and Applied Neurobiology
Publisher
Wiley
Published
2021-12-10
Volume
48
Issue
2
Pages
e12778-e12778
ISSN
  • 0305-1846 (ISSN-L)
  • 1365-2990
OpenAlex
W3217136548
Cited by
30
References
50
Citations by year
2026: 4 · 2025: 5 · 2024: 13 · 2023: 3 · 2022: 5
FWCI
2.50
Type
journal article
Language
en
Open access
Locations
  • Neuropathology and Applied Neurobiology (publishedVersion, cc-by)
  • bioRxiv (Cold Spring Harbor Laboratory) (acceptedVersion, cc-by-nc-nd)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
Funders
  • CurePSP
  • National Institute of Neurological Disorders and Stroke
  • Rainwater Charitable Foundation
Topics
  • Health Sciences › Medicine › Neurology › Amyotrophic Lateral Sclerosis Research
  • Health Sciences › Medicine › Physiology › Alzheimer's disease research and treatments
  • Health Sciences › Medicine › Psychiatry and Mental health › Dementia and Cognitive Impairment Research
Keywords
frontotemporal lobar degeneration, FTLD-TDP, TDP-43 pathology, tau pathology, primary age-related tauopathy, argyrophilic grain disease, corticobasal degeneration, motor neuron disease, C9orf72 mutation, MAPT, gene regulatory networks, basal forebrain
MeSH terms
Aged, Aged, 80 and over, Brain, DNA-Binding Proteins, Female, Humans, Male, Middle Aged, Neurons, tau Proteins, Tauopathies, Frontotemporal Lobar Degeneration

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