Large proportion of amyotrophic lateral sclerosis cases in sardinia due to a single founder mutation of the TARDBP gene

Adriano Chiò, Giuseppe Borghero, Maura Pugliatti, Anna Ticca, Andrea Calvo, Cristina Moglia, Roberto Mutani, Maura Brunetti, Irene Ossola, Maria Giovanna Marrosu, Maria Rita Murru, Gianluca Floris, Antonino Cannas, Leslie D. Parish, Paola Cossu, Yevgeniya Abramzon, Janel O. Johnson, Michael A. Nalls, Sampath Arepalli, Sean ChongDena G. Hernandez, Bryan J. Traynor, Gabriella Restagno, Stefania Battistini, Fabio Giannini, Claudia Ricci, Antonio Canosa, Sara Gallo, Maria Rosaria Monsurrò, Gioacchino Tedeschi, Jessica Mandrioli, Patrizia Sola, Fabrizio Salvi, Ilaria Bartolomei, Gabriele Mora, Kalliopi Marinou, Laura Papetti, Amelia Conte, Mario Sabatelli, Marco Luigetti, Rossella Spataro, Vincenzo La Bella, Piera Paladino, Claudia Caponnetto, Paolo Volanti

Research output: Contribution to journalArticlepeer-review

Abstract

Objective: To perform an extensive screening for mutations of amyotrophic lateral sclerosis (ALS)-related genes in a consecutive cohort of Sardinian patients, a genetic isolate phylogenically distinct from other European populations. Design: Population-based, prospective cohort study. Patients: A total of 135 Sardinian patients with ALS and 156 healthy control subjects of Sardinian origin who were age- and sex-matched to patients. Intervention: Patients underwent mutational analysis for SOD1, FUS, and TARDBP. Results: Mutational screening of the entire cohort found that 39 patients (28.7%) carried the c.1144G > A (p.A382T) missense mutation of the TARDBP gene. Of these, 15 had familial ALS (belonging to 10 distinct pedigrees) and 24 had apparently sporadic ALS. None of the 156 age-, sex-, and ethnicity-matched controls carried the pathogenic variant. Genotype data obtained for 5 ALS cases carrying the p.A382T mutation found that they shared a 94-single-nucleotide polymorphism risk haplotype that spanned 663 Kb across the TARDBP locus on chromosome 1p36.22. Three patients with ALS who carry the p.A382T mutation developed extrapyramidal symptoms several years after their initial presentation with motor weakness. Conclusions: The TARDBP p.A382T missense mutation accounts for approximately one-third of all ALS cases in this island population. These patients share a large risk haplotype across the TARDBP locus, indicating that they have a common ancestor.

Original languageEnglish
Pages (from-to)594-598
Number of pages5
JournalArchives of Neurology
Volume68
Issue number5
DOIs
Publication statusPublished - May 2011

ASJC Scopus subject areas

  • Clinical Neurology

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