Intermediate-length CAG expansions (encoding 27-33 glutamines, polyQ) of the Ataxin2 (ATXN2) gene represent a risk factor for amyotrophic lateral sclerosis (ALS). Recently, it has been proposed that ≥31 CAG expansions may influence ALS phenotype. We assessed whether ATXN2 intermediate-length polyQ expansions influence ALS phenotype in a series of 375 patients of Sardinian ancestry. Controls were 247 neurologically healthy subjects, resident in the study area, age- and gender-matched to cases. The frequency of ≥31 polyQ ATNX2 repeats was significantly more common in ALS cases (4 patients vs. no control, p = 0.0001). All patients with ≥31 polyQ repeats had a spinal onset versus 73.3% of patients with <31 polyQ repeats. Patients with an increased number of polyQ repeats have a shorter survival than those with <31 repeats (1.2 vs. 4.2 years, p = 0.035). In this large series of ALS patients of Sardinian ancestry, we have found that ≥31 polyQ repeats of the ATXN2 gene influenced patients' phenotype, being associated to a spinal onset and a significantly shorter survival.

ATXN2 is a modifier of phenotype in ALS patients of Sardinian ancestry

Canosa, Antonio;MOGLIA, Cristina;CALVO, Andrea;CHIO', Adriano;CASALE, Federico;MARRALI, GIUSEPPE;FUDA, Giuseppe;
2015

Abstract

Intermediate-length CAG expansions (encoding 27-33 glutamines, polyQ) of the Ataxin2 (ATXN2) gene represent a risk factor for amyotrophic lateral sclerosis (ALS). Recently, it has been proposed that ≥31 CAG expansions may influence ALS phenotype. We assessed whether ATXN2 intermediate-length polyQ expansions influence ALS phenotype in a series of 375 patients of Sardinian ancestry. Controls were 247 neurologically healthy subjects, resident in the study area, age- and gender-matched to cases. The frequency of ≥31 polyQ ATNX2 repeats was significantly more common in ALS cases (4 patients vs. no control, p = 0.0001). All patients with ≥31 polyQ repeats had a spinal onset versus 73.3% of patients with <31 polyQ repeats. Patients with an increased number of polyQ repeats have a shorter survival than those with <31 repeats (1.2 vs. 4.2 years, p = 0.035). In this large series of ALS patients of Sardinian ancestry, we have found that ≥31 polyQ repeats of the ATXN2 gene influenced patients' phenotype, being associated to a spinal onset and a significantly shorter survival.
36
10(2906.e)
1
5
www.elsevier.com/locate/neuaging
Amyotrophic lateral sclerosis; Ataxin 2 gene; Genetic modifier; Amyotrophic Lateral Sclerosis; Ataxin-2; Female; Humans; Italy; Male; Middle Aged; Risk Factors; Survival Rate; Trinucleotide Repeat Expansion; Genetic Association Studies; Phenotype; Neurology (clinical); Neuroscience (all); Aging; Developmental Biology; Geriatrics and Gerontology
Borghero, Giuseppe; Pugliatti, Maura; Marrosu, Francesco; Marrosu, Maria Giovanna; Murru, Maria Rita; Floris, Gianluca; Cannas, Antonino; Parish, Leslie D.; Cau, Tea B.; Loi, Daniela; Ticca, Anna; Traccis, Sebastiano; Manera, Umberto; Canosa, Antonio; Moglia, Cristina; Calvo, Andrea; Barberis, Marco; Brunetti, Maura; Renton, Alan E.; Nalls, Mike A.; Traynor, Bryan J.; Restagno, Gabriella; Chiò, Adriano; Logullo, Francesco O.; Simone, Isabella; Logroscino, Giancarlo; Salvi, Fabrizio; Bartolomei, Ilaria; Capasso, Margherita; Caponnetto, Claudia; Mancardi, Gianluigi; Mandich, Paola; Origone, Paola; Conforti, Francesca L.; Mora, Gabriele; Marinou, Kalliopi; Sideri, Riccardo; Lunetta, Christian; Penco, Silvana; Mosca, Lorena; Nilo, Riva; Pinter, Giuseppe Lauria; Corbo, Massimo; Volanti, Paolo; Mandrioli, Jessica; Fini, Nicola; Georgoulopoulou, Eleni; Tremolizzo, Lucio; Maria Rosaria Monsurrò, Null; Tedeschi, Gioacchino; Cristillo, Viviana; la Bella, Vincenzo; Spataro, Rossella; Colletti, Tiziana; Sabatelli, Mario; Zollino, Marcella; Conte, Amelia; Luigetti, Marco; Lattante, Serena; Marangi, Giuseppe; Santarelli, Marialuisa; Petrucci, Antonio; Giannini, Fabio; Battistini, Stefania; Ricci, Claudia; Casale, Federico; Marrali, Giuseppe; Fuda, Giuseppe; Ossola, Irene; Cammarosano, Stefania; Ilardi, Antonio; Bertuzzo, Davide; Tanel, Raffaella; Pisano, Fabrizio; Costantino, Emanuela; Pani, Carla; Puddu, Roberta; Caredda, Carla; Piras, Valeria; Tranquilli, Stefania; Cuccu, Stefania; Corongiu, Daniela; Melis, Maurizio; Milia, Antonio; Pirisi, Angelo; Occhineri, Patrizia; Ortu, Enzo
File in questo prodotto:
File Dimensione Formato  
ATNX2 is not a regulatory gene inC9orf72 patients of Italian ancestry v5_4aperto.pdf

Accesso aperto

Descrizione: Bozza
Tipo di file: POSTPRINT (VERSIONE FINALE DELL’AUTORE)
Dimensione 283.49 kB
Formato Adobe PDF
283.49 kB Adobe PDF Visualizza/Apri
ATXN2 - Neurobiol Aging 2015.pdf

Accesso riservato

Tipo di file: PDF EDITORIALE
Dimensione 438.97 kB
Formato Adobe PDF
438.97 kB Adobe PDF   Visualizza/Apri   Richiedi una copia

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/2318/1563250
Citazioni
  • ???jsp.display-item.citation.pmc??? 6
  • Scopus 12
  • ???jsp.display-item.citation.isi??? 12
social impact