Cited by 63Amyotrophic Lateral Sclerosis ResearchHereditary Neurological DisordersAlzheimer's disease research and treatments

Axonal ligation induces transient redistribution of TDP-43 in brainstem motor neurons

Sato, T., Takeuchi, S., Saito, A., Ding, W., Bamba, H., Matsuura, H., Hisa, Y., Tooyama, I. +1 more·2009·Neuroscience

Abstract

Nuclear exclusion of TAR DNA binding protein 43 (TDP-43) and formation of cytosolic aggregates are a pathological characteristic of amyotrophic lateral sclerosis (ALS). However, the molecular basis of the aberrant distribution of TDP-43 remains elusive. Here, we show evidence that axonal ligation induced transient nuclear exclusion and peripheral accumulation of TDP-43, without apparent cytosolic aggregates in hypoglossal neurons in mice. Immunohistochemistry showed marked loss of nuclear TDP-43 7-14 days after ligation, which was accompanied by reduction of choline acetyltransferase (ChAT). TDP-43 staining was restored in the nucleus on day 28 exclusively in the neurons with normalized ChAT expression. We also showed that importin beta, which was shown to mediate nuclear transport of TDP-43 was downregulated transiently by nerve ligation. The analysis of the peripheral nerves proximal to the ligation revealed that TDP-43 markedly accumulated with a concomitant decrease in active autophagosome. Moreover, we showed that TDP-43 was present in the microsome fraction containing endoplasmic reticulum (ER) or autophagosomes in the brainstem section, indicating that TDP-43 is axonally transported with vesicles. These results indicate that axonal damage is associated with redistribution of TDP-43 through the combination of defective axonal autophagy periphery and the impaired nuclear transport system in the soma. Moreover, it was also shown that transient redistribution of TDP-43 does not prevent motor neurons from axonal regeneration. Therefore, our data suggest that the subcellular distribution of TDP-43 correlates to the innervation status of motor neurons, which may be governed by unidentified cause of ALS.

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Crossref · 10.1016/j.neuroscience.2009.09.050

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  • TDP-43 binds to many cellular transcripts including tau and alpha synuclein, and its dysregulation may underlie some of the pathologies seen with these proteins; TDP-43 may influence tau isoform expression.

    “TDP-43 binds to many cellular transcripts including tau and alpha synuclein, and its dysregulation may underlie some of the pathologies seen with these proteins [162]. In particular, TDP-43 may influence tau iso-form expression [136].”

    From The neuropathology of sport (2014) · cites this paper as [162]

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Authors
Sato, T., Takeuchi, S., Saito, A., Ding, W., Bamba, H., Matsuura, H., Hisa, Y., Tooyama, I., & Urushitani, M.
Affiliations
  • Shiga University of Medical Science (JP)
  • Kyoto Prefectural University of Medicine (JP)
Venue
Neuroscience
Publisher
Elsevier BV
Published
2009-12
Volume
164
Issue
4
Pages
1565-1578
ISSN
0306-4522 (ISSN-L)
OpenAlex
W1975640285
Cited by
63
References
36
Citations by year
2024: 2 · 2022: 2 · 2021: 3 · 2020: 1 · 2019: 3 · 2018: 2 · 2017: 1 · 2016: 5 · 2015: 4 · 2014: 3 · 2013: 10 · 2012: 9
FWCI
5.74
Type
journal article
Language
en
Open access
closed
Locations
  • Neuroscience (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • Japan Society of Promotion of Science (JSPS
  • Japan Health and Labour Science Research Grants
  • Japan ALS Association
  • Takeda Science Foundation
  • Presidential Grant-in-Aid from SUMS
Topics
  • Health Sciences › Medicine › Neurology › Amyotrophic Lateral Sclerosis Research
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Hereditary Neurological Disorders
  • Health Sciences › Medicine › Physiology › Alzheimer's disease research and treatments
Keywords
TDP-43, amyotrophic lateral sclerosis, motor neurons, hypoglossal nucleus, nuclear exclusion, axonal transport, autophagy, importin beta, choline acetyltransferase, endoplasmic reticulum, axon regeneration, subcellular localization
MeSH terms
Animals, Autophagy, Axons, Axonal Transport, Brain Stem, Cell Nucleus, Choline O-Acetyltransferase, DNA-Binding Proteins, Hypoglossal Nerve, Ligation, Mice, Inbred C57BL, Motor Neurons, RNA, Messenger, Transcription, Genetic, Active Transport, Cell Nucleus, beta Karyopherins, Mice

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