Cited by 992Amyotrophic Lateral Sclerosis ResearchAlzheimer's disease research and treatmentsHereditary Neurological Disorders

Pathological TDP‐43 distinguishes sporadic amyotrophic lateral sclerosis from amyotrophic lateral sclerosis with SOD1 mutations

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Mackenzie, Ian R. A., Bigio, Eileen H., Ince, Paul G., Geser, Felix, Neumann, Manuela, Cairns, Nigel J., Kwong, Linda K., Forman, Mark S. +12 more·2007·Annals of Neurology

Abstract

Objective: Amyotrophic lateral sclerosis (ALS) is a common, fatal motor neuron disorder with no effective treatment. Approximately 10% of cases are familial ALS (FALS), and the most common genetic abnormality is superoxide dismutase ‐ 1 ( SOD1 ) mutations. Most ALS research in the past decade has focused on the neurotoxicity of mutant SOD1, and this knowledge has directed therapeutic strategies. We recently identified TDP‐43 as the major pathological protein in sporadic ALS. In this study, we investigated TDP‐43 in a larger series of ALS cases (n = 111), including familial cases with and without SOD1 mutations. Methods: Ubiquitin and TDP‐43 immunohistochemistry was performed on postmortem tissue from sporadic ALS (n = 59), ALS with SOD1 mutations (n = 15), SOD ‐ 1 –negative FALS (n = 11), and ALS with dementia (n = 26). Biochemical analysis was performed on representative cases from each group. Results: All cases of sporadic ALS, ALS with dementia, and SOD1 ‐negative FALS had neuronal and glial inclusions that were immunoreactive for both ubiquitin and TDP‐43. Cases with SOD1 mutations had ubiquitin‐positive neuronal inclusions; however, no cases were immunoreactive for TDP‐43. Biochemical analysis of postmortem tissue from sporadic ALS and SOD1 ‐negative FALS demonstrated pathological forms of TDP‐43 that were absent in cases with SOD1 mutations. Interpretation: These findings implicate pathological TDP‐43 in the pathogenesis of sporadic ALS. In contrast, the absence of pathological TDP‐43 in cases with SOD1 mutations implies that motor neuron degeneration in these cases may result from a different mechanism, and that cases with SOD1 mutations may not be the familial counterpart of sporadic ALS. Ann Neurol 2007;61:427–434

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  1. Stewart HG, Mackenzie IR, Eisen A, et al. Clinicopathologic phenotype of ALS with G72C SOD1 gene mutation mimick- ing a myopathy. Muscle Nerve 2006;33:701-706.
  2. Weiss MD, Ravits JM, Schuman N, Carter GT. A4V superox- ide dismutase mutation in apparently sporadic ALS. Amyotroph Lateral Scler 2006;7:61-63.

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Authors
Mackenzie, I. R. A., Bigio, E. H., Ince, P. G., Geser, F., Neumann, M., Cairns, N. J., Kwong, L. K., Forman, M. S., Ravits, J., Stewart, H., Eisen, A., McClusky, L., Kretzschmar, H. A., Monoranu, C. M., Highley, J. R., Kirby, J., Siddique, T., Shaw, P. J., Lee, V. M., & Trojanowski, J. Q.
Affiliations
  • University of British Columbia (CA)
  • Northwestern University (US)
  • University of Sheffield (GB)
  • University of Pennsylvania (US)
  • Institut für Neuropathologie (DE)
  • Washington University in St. Louis (US)
  • Virginia Mason Medical Center (US)
  • University of Würzburg (DE)
Corresponding author
Mackenzie, Ian R. A.
Venue
Annals of Neurology
Publisher
Wiley
Published
2007-04-27
Volume
61
Issue
5
Pages
427-434
ISSN
  • 0364-5134 (ISSN-L)
  • 1531-8249
OpenAlex
W2053362200
Cited by
992
References
34
Citations by year
2026: 23 · 2025: 55 · 2024: 57 · 2023: 45 · 2022: 59 · 2021: 61 · 2020: 53 · 2019: 46 · 2018: 57 · 2017: 50 · 2016: 50 · 2015: 43 · 2014: 36 · 2013: 49 · 2012: 54
FWCI
44.73
Type
journal article
Language
en
Open access
Locations
  • Annals of Neurology (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • Wellcome Trust
  • National Institutes of Health
  • Canadian Institutes of Health Research
  • National Institute on Aging (AG13854, P30AG10124, U01AG016976, P01 AG-17586, P30AG010124, P01AG017586, U01-AG 16976, P 50 AG05681, P50AG005681, P30AG013854)
Topics
  • Health Sciences › Medicine › Neurology › Amyotrophic Lateral Sclerosis Research
  • Health Sciences › Medicine › Physiology › Alzheimer's disease research and treatments
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Hereditary Neurological Disorders
Keywords
amyotrophic lateral sclerosis, TDP-43, SOD1 mutations, sporadic ALS, familial ALS, ubiquitin-positive inclusions, motor neuron degeneration, ALS pathogenesis
MeSH terms
Superoxide Dismutase-1, Amyotrophic Lateral Sclerosis, DNA-Binding Proteins, Humans, Immunohistochemistry, Medulla Oblongata, Motor Cortex, Mutation, Spinal Cord, Superoxide Dismutase, Ubiquitin

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