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• W3128244902 abstract "Abstract Amyotrophic lateral sclerosis (ALS) is a progressive fatal neurodegenerative disease that affects motoneurons. Mutations in superoxide dismutase 1 (SOD1) have been described as a causative genetic factor for ALS. Mice overexpressing ALS-linked mutant SOD1 develop ALS symptoms accompanied by histopathological alterations and protein aggregation. The protein disulfide isomerase family member ERp57 is one of the main up-regulated proteins in tissue of ALS patients and mutant SOD1 mice, whereas point mutations in ERp57 were described as possible risk factors to develop the disease. ERp57 catalyzes disulfide bond formation and isomerization in the endoplasmic reticulum (ER), constituting a central component of protein quality control mechanisms. However, the actual contribution of ERp57 to ALS pathogenesis remained to be defined. Here, we studied the consequences of overexpressing ERp57 in experimental ALS using mutant SOD1 mice. Double transgenic SOD1 G93A /ERp57 WT animals presented delayed deterioration of electrophysiological activity and maintained muscle innervation compared to single transgenic SOD1 G93A littermates at early-symptomatic stage, along with improved motor performance without affecting survival. The overexpression of ERp57 reduced mutant SOD1 aggregation, but only at disease end-stage, dissociating its role as an anti-aggregation factor from the protection of neuromuscular junctions. Instead, proteomic analysis revealed that the neuroprotective effects of ERp57 overexpression correlated with increased levels of synaptic and actin cytoskeleton proteins in the spinal cord. Taken together, our results suggest that ERp57 operates as a disease modifier at early stages by maintaining motoneuron connectivity." @default.
• W3128244902 created "2021-02-15" @default.
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• W3128244902 date "2021-02-04" @default.
• W3128244902 modified "2023-10-18" @default.
• W3128244902 title "Protein disulfide isomerase ERp57 protects early muscle denervation in experimental ALS" @default.
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• W3128244902 doi "https://doi.org/10.1186/s40478-020-01116-z" @default.
• W3128244902 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/7863244" @default.
• W3128244902 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/33541434" @default.
• W3128244902 hasPublicationYear "2021" @default.
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