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Targeted Depletion of TDP-43 Expression in the Spinal Cord Motor Neurons Leads to the Development of Amyotrophic Lateral Sclerosis-like Phenotypes in Mice

Open access
Wu, Lien-Szu, Cheng, Wei-Cheng, Shen, C.-K. James·2012·Journal of Biological Chemistry

Abstract

ALS, or amyotrophic lateral sclerosis, is a progressive and fatal motor neuron disease with no effective medicine. Importantly, the majority of the ALS cases are with TDP-43 proteinopathies characterized with TDP-43-positive, ubiquitin-positive inclusions (UBIs) in the cytosol. However, the role of the mismetabolism of TDP-43 in the pathogenesis of ALS with TDP-43 proteinopathies is unclear. Using the conditional mouse gene targeting approach, we show that mice with inactivation of the Tardbp gene in the spinal cord motor neurons (HB9:Cre-Tardbp(lx/-)) exhibit progressive and male-dominant development of ALS-related phenotypes including kyphosis, motor dysfunctions, muscle weakness/atrophy, motor neuron loss, and astrocytosis in the spinal cord. Significantly, ubiquitinated proteins accumulate in the TDP-43-depleted motor neurons of the spinal cords of HB9:Cre-Tardbp(lx/-) mice with the ALS phenotypes. This study not only establishes an important role of TDP-43 in the long term survival and functioning of the mammalian spinal cord motor neurons, but also establishes that loss of TDP-43 function could be one major cause for neurodegeneration in ALS with TDP-43 proteinopathies.

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Metadata

Authors
Wu, L.-S., Cheng, W.-C., & Shen, C.-K. J.
Venue
Journal of Biological Chemistry
Publisher
Elsevier BV
Published
2012-08
Volume
287
Issue
33
Pages
27335-27344
ISSN
0021-9258 (ISSN-L)
OpenAlex
W2027433665
Cited by
159
References
6
FWCI
10.10
Type
journal article
Language
en
Open access
hybrid

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CoChat. (2026). Citation check: Targeted Depletion of TDP-43 Expression in the Spinal Cord Motor Neurons Leads to the Development of Amyotrophic Lateral Sclerosis-like Phenotypes in Mice. https://app.cochat.ai/papers/10.1074/jbc.m112.359000
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Wu, L.-S., Cheng, W.-C., & Shen, C.-K. J. (2012). Targeted Depletion of TDP-43 Expression in the Spinal Cord Motor Neurons Leads to the Development of Amyotrophic Lateral Sclerosis-like Phenotypes in Mice. Journal of Biological Chemistry. https://doi.org/10.1074/jbc.m112.359000

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