ALS-Related Mutant FUS Protein Is Mislocalized to Cytoplasm and Is Recruited into Stress Granules of Fibroblasts from Asymptomatic FUS P525L Mutation Carriers
| Autor: | Lo Bello M., Di Fini F., Notaro A., Spataro R., Conforti F.L., La Bella V. |
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| Přispěvatelé: | Lo Bello M., Di Fini F., Notaro A., Spataro R., Conforti F.L., La Bella V. |
| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
Male
Time Factors Proline Time Factor Neural Conduction Human fibroblast Cytoplasmic Granules Follow-Up Studie FUS P525L carrier Cytoplasmic FUS expression Leucine Tubulin Stress granule Amyotrophic lateral sclerosis · FUS P525L carriers · Cytoplasmic FUS expression · Stress granules · Human fibroblasts Humans Cell Nucleu Amyotrophic lateral sclerosi Cells Cultured Skin Cell Nucleus Amyotrophic Lateral Sclerosis Fibroblasts Protein Transport Subcellular Fraction Mutation Fibroblast RNA-Binding Protein FUS Female Cytoplasmic Granule Follow-Up Studies Subcellular Fractions Human |
| Zdroj: | Neurodegenerative diseases 17 (2017): 292–303. doi:10.1159/000480085 info:cnr-pdr/source/autori:Lo Bello M.; Di Fini F.; Notaro A.; Spataro R.; Conforti F.L.; La Bella V./titolo:ALS-Related Mutant FUS Protein Is Mislocalized to Cytoplasm and Is Recruited into Stress Granules of Fibroblasts from Asymptomatic FUS P525L Mutation Carriers/doi:10.1159%2F000480085/rivista:Neurodegenerative diseases (Print)/anno:2017/pagina_da:292/pagina_a:303/intervallo_pagine:292–303/volume:17 |
| DOI: | 10.1159/000480085 |
| Popis: | Background: Amyotrophic lateral sclerosis (ALS) shows a strong genetic basis, with SOD1, FUS, TARDBP, and C9ORF72 being the genes most frequently involved. This has allowed identification of asymptomatic mutation carriers, which may be of help in understanding the molecular changes preceding disease onset. Objectives: We studied the cellular expression of FUS protein and the effect of heat-shock-and dithiothreitol-induced stress in fibroblasts from FUS P525L mutation carriers, healthy controls, and patients with sporadic ALS. Methods: Western blots and immunocytochemistry were performed to study the subcellular localization of FUS protein. Control and stressed cells were double stained with FUS and the stress marker TIA-R. Results: Fibroblasts from healthy controls and sporadic ALS cases showed a prominent nuclear FUS expression. In the 2 FUS P525L mutation carriers, instead, most cells showed a protein localization in both nucleus and cytoplasm, or exclusively in the cytoplasm. Stress prompted the formation of cytoplasmic granules in all subjects and in sporadic ALS FUS mislocalization to the cytoplasm. Cytoplasmic FUS was recruited into stress granules, which showed a time-dependent decrease in all subjects. However, in the FUS P525L fibroblasts, the granules persisted longer, and they were more numerous than those detected in the cells from controls and sporadic ALS patients. Conclusions: We show that in fibroblasts of FUS P525L mutation carriers, FUS mislocalized to the cytoplasm where it redistributed into stress granules with likely a dose effect, i.e. a higher number of cells with granules, which persist longer, than in controls and ALS cases. These data represent an early molecular change occurring before ALS onset, suggesting a transient preaggregative state. (C) 2017 S. Karger AG, Basel |
| Databáze: | OpenAIRE |
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