Article ; Online: Elevated FUS levels by overriding its autoregulation produce gain-of-toxicity properties that disrupt protein and RNA homeostasis.
2019 Volume 15, Issue 9, Page(s) 1665–1667
Abstract: Coding or non-coding mutations in FUS (fused in sarcoma) cause amyotrophic lateral sclerosis (ALS) and frontotemporal dementia (FTD). In addition to familial ALS, abnormal aggregates of FUS are present in a portion of FTD and other neurodegenerative ... ...
Abstract | Coding or non-coding mutations in FUS (fused in sarcoma) cause amyotrophic lateral sclerosis (ALS) and frontotemporal dementia (FTD). In addition to familial ALS, abnormal aggregates of FUS are present in a portion of FTD and other neurodegenerative diseases independent of their mutations. Broad expression within the central nervous system of either wild-type or two ALS-linked human FUS mutants produces progressive motor phenotypes accompanied by characteristic ALS-like pathology. FUS levels are autoregulated to maintain an optimal steady-state level. Increasing FUS expression by saturating its autoregulatory mechanism results in rapidly progressive neurological phenotypes and dose-dependent lethality. Genome-wide expression analysis reveals genetic mis-regulations distinct from those via FUS reduction. Among these are increased expression of lysosomal proteins, suggestive of disruption in protein homeostasis as a potential gain-of-toxicity mechanism. Indeed, increased expression of wild-type FUS or ALS-linked mutant forms of FUS inhibit macroautophagy/autophagy. Collectively, our results demonstrate that: (1) mice expressing FUS develop progressive motor deficits, (2) increased FUS expression by overriding its autoregulatory mechanism accelerates neurodegeneration, providing a basis for FUS involvement without mutation, and (3) disruption in both protein homeostasis and RNA processing contribute to FUS-mediated toxicity. |
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MeSH term(s) | Amyotrophic Lateral Sclerosis ; Animals ; Autophagy ; Homeostasis ; Humans ; Mice ; Mutation ; RNA ; RNA-Binding Protein FUS/genetics |
Chemical Substances | FUS protein, human ; RNA-Binding Protein FUS ; RNA (63231-63-0) |
Language | English |
Publishing date | 2019-06-23 |
Publishing country | United States |
Document type | Journal Article ; Research Support, Non-U.S. Gov't ; Comment |
ZDB-ID | 2454135-7 |
ISSN | 1554-8635 ; 1554-8627 |
ISSN (online) | 1554-8635 |
ISSN | 1554-8627 |
DOI | 10.1080/15548627.2019.1633162 |
Database | MEDical Literature Analysis and Retrieval System OnLINE |
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