Cited by 197Amyotrophic Lateral Sclerosis ResearchAutophagy in Disease and TherapyAlzheimer's disease research and treatments

TDP‐43 loss of function increases TFEB activity and blocks autophagosome–lysosome fusion

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Xia, Qin, Wang, Hongfeng, Hao, Zongbing, Fu, Cheng, Hu, Qingsong, Gao, Feng, Ren, Haigang, Chen, Dong +3 more·2016·The EMBO Journal

Abstract

Amyotrophic lateral sclerosis (ALS) is a fatal neurodegenerative disease that is characterized by selective loss of motor neurons in brain and spinal cord. TAR DNA-binding protein 43 (TDP-43) was identified as a major component of disease pathogenesis in ALS, frontotemporal lobar degeneration (FTLD), and other neurodegenerative disease. Despite the fact that TDP-43 is a multi-functional protein involved in RNA processing and a large number of TDP-43 RNA targets have been discovered, the initial toxic effect and the pathogenic mechanism underlying TDP-43-linked neurodegeneration remain elusive. In this study, we found that loss of TDP-43 strongly induced a nuclear translocation of TFEB, the master regulator of lysosomal biogenesis and autophagy, through targeting the mTORC1 key component raptor. This regulation in turn enhanced global gene expressions in the autophagy-lysosome pathway (ALP) and increased autophagosomal and lysosomal biogenesis. However, loss of TDP-43 also impaired the fusion of autophagosomes with lysosomes through dynactin 1 downregulation, leading to accumulation of immature autophagic vesicles and overwhelmed ALP function. Importantly, inhibition of mTORC1 signaling by rapamycin treatment aggravated the neurodegenerative phenotype in a TDP-43-depleted Drosophila model, whereas activation of mTORC1 signaling by PA treatment ameliorated the neurodegenerative phenotype. Taken together, our data indicate that impaired mTORC1 signaling and influenced ALP may contribute to TDP-43-mediated neurodegeneration.

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  • TARDBP downregulation promotes TFEB nuclear localization and TFEB target gene expression, but also reduces DCTN1 expression, thereby blocking autolysosome formation and impairing autophagic flux.

    “TARDBP downregulation promotes TFEB nuclear localization and TFEB target gene expression, but it also reduces DCTN1 (dynactin subunit 1) expression, thereby blocking autolysosome formation and impairing autophagic flux [350].”
  • Autophagy dysfunction is linked to TARDBP pathology in ALS.

    “Together, these findings link autophagy dysfunction to TARDBP pathology in ALS”

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Authors
Xia, Q., Wang, H., Hao, Z., Fu, C., Hu, Q., Gao, F., Ren, H., Chen, D., Han, J., Ying, Z., & Wang, G.
Affiliations
  • Soochow University (CN)
  • University of Science and Technology of China (CN)
  • Southeast University (CN)
Corresponding author
  • Ying, Zheng
  • Wang, Guanghui
Venue
The EMBO Journal
Published
2015-12-23
Volume
35
Issue
2
Pages
121-142
ISSN
  • 0261-4189 (ISSN-L)
  • 1460-2075
OpenAlex
W2264272493
Cited by
195
References
58
Citations by year
2026: 16 · 2025: 20 · 2024: 17 · 2023: 11 · 2022: 20 · 2021: 20 · 2020: 26 · 2019: 25 · 2018: 12 · 2017: 19 · 2016: 8 · 2015: 1
FWCI
9.40
Type
journal article
Language
en
Open access
Locations
  • The EMBO Journal (publishedVersion)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Natural Sciences Foundation of China (31330030, 81371393, 31200803, 31371072)
  • National High‐tech Research and Development program of China 973‐projects (2012CB947602)
  • Natural Science Foundation of Jiangsu Province (BK2012181)
  • Jiangsu Key Laboratory of Translational Research and Therapy for Neuro‐Psycho‐Diseases (BM2013003)
  • Priority Academic Program Development of Jiangsu Higher Education Institutions
Topics
  • Health Sciences › Medicine › Neurology › Amyotrophic Lateral Sclerosis Research
  • Health Sciences › Medicine › Epidemiology › Autophagy in Disease and Therapy
  • Health Sciences › Medicine › Physiology › Alzheimer's disease research and treatments
Keywords
TDP-43, TFEB, mTORC1, autophagy-lysosome pathway, autophagosome-lysosome fusion, lysosomal biogenesis, neurodegeneration, amyotrophic lateral sclerosis, raptors, rapamycin, Drosophila model
MeSH terms
Mechanistic Target of Rapamycin Complex 1, Amyotrophic Lateral Sclerosis, Animals, Autophagy, Cell Line, DNA-Binding Proteins, Drosophila, HeLa Cells, Humans, Lysosomes, Models, Biological, Cell Line, Tumor, Multiprotein Complexes, Mice, Rats, Basic Helix-Loop-Helix Leucine Zipper Transcription Factors, Frontotemporal Lobar Degeneration, HEK293 Cells, TOR Serine-Threonine Kinases

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