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Identification of a pathogenic mutation in ARPP21 in patients with amyotrophic lateral sclerosis
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Identification of a pathogenic mutation in ARPP21 in patients with amyotrophic lateral sclerosis
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Identification of a pathogenic mutation in ARPP21 in patients with amyotrophic lateral sclerosis
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Journal Article
Identification of a pathogenic mutation in ARPP21 in patients with amyotrophic lateral sclerosis
2025
Overview
Background and objectiveBetween 5% and 10% of amyotrophic lateral sclerosis (ALS) cases have a family history of the disease, 30% of which do not have an identifiable underlying genetic cause after a comprehensive study of the known ALS-related genes. Based on a significantly increased incidence of ALS in a small geographical region from Spain, the aim of this work was to identify novel ALS-related genes in ALS cases with negative genetic testing.MethodsWe detected an increased incidence of both sporadic and, especially, familial ALS cases in a small region from Spain compared with available demographic and epidemiological data. We performed whole genome sequencing in a group of 12 patients with ALS (5 of them familial) from this unique area. We expanded the study to include affected family members and additional cases from a wider surrounding region.ResultsWe identified a shared missense mutation (c.1586C>T; p.Pro529Leu) in the cyclic AMP regulated phosphoprotein 21 (ARPP21) gene that encodes an RNA-binding protein, in a total of 10 patients with ALS from 7 unrelated families. No mutations were found in other ALS-causing genes.ConclusionsWhile previous studies have dismissed a causal role of ARPP21 in ALS, our results strongly support ARPP21 as a novel ALS-causing gene.
Publisher
BMJ Publishing Group Ltd,BMJ Publishing Group LTD,BMJ Publishing Group
Subject
/ Aged
/ ALS
/ Amyotrophic lateral sclerosis
/ Amyotrophic Lateral Sclerosis - epidemiology
/ Amyotrophic Lateral Sclerosis - genetics
/ Female
/ Genes
/ Genetic Predisposition to Disease
/ GENETICS
/ Genomes
/ Humans
/ Male
/ Mutation
/ Mutation, Missense - genetics
/ Pedigree
/ Proteins
/ Software
