ALS ‐linked protein disulfide isomerase variants cause motor dysfunction
| Autor: | Jorge Ojeda, Sara Fernandez-Collemann, Mirva J. Saaranen, Danilo B. Medinas, Fernando J. Bustos, Viviana Pérez, Johnny Salameh, Alicia Colombo, Paloma Gonzalez-Perez, Natalia Muñoz, Pablo Rozas, Robert H. Brown, Mauricio Torres, Vicente Valenzuela, Lloyd W. Ruddock, Pablo Henny, Miguel L. Concha, Rodrigo Lopez-Gonzalez, Juan Pablo Henríquez, Rene L. Vidal, Alfredo Sagredo, Brigitte van Zundert, Sandra Almeida, Soledad Matus, Thergiory Irrazabal, Mario Campero, Fen-Biao Gao, Catherine I. Andreu, Ute Woehlbier, Ricardo Armisen, Karina Palma, Claudio Hetz |
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| Rok vydání: | 2016 |
| Předmět: |
0301 basic medicine
Genetics Mutation General Immunology and Microbiology biology General Neuroscience Endoplasmic reticulum PDIA3 biology.organism_classification medicine.disease_cause medicine.disease General Biochemistry Genetics and Molecular Biology 03 medical and health sciences 030104 developmental biology Proteostasis Foldase medicine Amyotrophic lateral sclerosis Protein disulfide-isomerase Molecular Biology Zebrafish |
| Zdroj: | EMBO J Artículos CONICYT CONICYT Chile instacron:CONICYT |
| ISSN: | 1460-2075 0261-4189 |
| Popis: | Disturbance of endoplasmic reticulum (ER) proteostasis is a common feature of amyotrophic lateral sclerosis (ALS). Protein disulfide isomerases (PDIs) are ER foldases identified as possible ALS biomarkers, as well as neuroprotective factors. However, no functional studies have addressed their impact on the disease process. Here, we functionally characterized four ALS‐linked mutations recently identified in two major PDI genes, PDIA1 and PDIA3/ERp57. Phenotypic screening in zebrafish revealed that the expression of these PDI variants induce motor defects associated with a disruption of motoneuron connectivity. Similarly, the expression of mutant PDIs impaired dendritic outgrowth in motoneuron cell culture models. Cellular and biochemical studies identified distinct molecular defects underlying the pathogenicity of these PDI mutants. Finally, targeting ERp57 in the nervous system led to severe motor dysfunction in mice associated with a loss of neuromuscular synapses. This study identifies ER proteostasis imbalance as a risk factor for ALS, driving initial stages of the disease. |
| Databáze: | OpenAIRE |
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