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• W3129134311 abstract "ABSTRACT Mutations in HNRNPA1 encoding heterogeneous nuclear ribonucleoprotein (hnRNP) A1 are a rare cause of amyotrophic lateral sclerosis (ALS) and multisystem proteinopathy (MSP). hnRNPA1 is part of the group of RNA-binding proteins (RBPs) that assemble with RNA to form ribonucleoproteins. hnRNPs are a major subclass of evolutionarily conserved RBPs that are primarily concentrated in the nucleus and are heavily involved in pre-mRNA splicing, mRNA stability and transcriptional/translational regulation. During times of stress, standard translational programming is interrupted, and hnRNPs, mRNA, and other RBPs condense in the cytoplasm, forming liquid-liquid phase separated (LLPS) membraneless organelles termed stress granules (SGs). SGs are central to the pathogenesis of (neuro-)degenerative diseases, including ALS and inclusion body myopathy (IBM). hnRNPs and other RBPs are critical components of SGs. Indeed, the link between SGs, hnRNPs, and neurodegenerative diseases has been established by the identification of additional mutations in RBPs that affect SG biology, including FUS, TDP-43, hnRNPA1, hnRNPA2B1, and TIA1, each of which can directly lead to ALS, IBM and other related neurodegenerative diseases. Here, we report and characterize four novel HNRNPA1 mutations and two known HNRNPA1 mutations, previously reported as being causal for ALS, in a broad spectrum of patients with hereditary motor neuropathy (HMN), ALS, and myopathy. Our results show the different effects of mutations on hnRNPA1 fibrillization, liquid-liquid phase separation, and SG dynamics, indicating the possibility of different underlying pathomechanisms for HNRNPA1 mutations with a possible link to the clinical phenotypes." @default.
• W3129134311 created "2021-02-15" @default.
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• W3129134311 date "2021-02-03" @default.
• W3129134311 modified "2023-09-27" @default.
• W3129134311 title "DEFINING THE DIVERSITY OF HNRNPA1 MUTATIONS IN CLINICAL PHENOTYPE AND PATHOMECHANISM" @default.
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