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From the Department of Neurology (N.T., A.L.L., P.K., D.M.M.-Y., P.C.S., R.H.B., J.E.L.), University of Massachusetts Medical School, Worcester; Department of Neurology and Laboratory of Neuroscience (N.T., V.S., A.R.), Centro "Dino Ferrari," Università degli Studi di Milano-IRCCS Istituto Auxologico Italiano, Milan; Unit of Genetics of Neurodegenerative and Metabolic Diseases (C.G., F.T.), Fondazione IRCCS Istituto Neurologico "Carlo Besta," Milan, Italy; Department of Neurology (T.J.K.), Massachusetts General Hospital, Boston; and Howard Hughes Medical Institute and Department of Biology (P.C.S.), Massachusetts Institute of Technology, Cambridge.
* To whom correspondence should be addressed. E-mail: john.landers{at}umassmed.edu.
Objective: Mutations in the FUS gene on chromosome 16 have been recently discovered as a cause of familial amyotrophic lateral sclerosis (FALS). This study determined the frequency and identities of FUS gene mutations in a cohort of Italian patients with FALS.
Methods: We screened all 15 coding exons of FUS for mutations in 94 Italian patients with FALS.
Results: We identified 4 distinct missense mutations in 5 patients; 2 were novel. The mutations were not present in 376 healthy Italian controls and thus are likely to be pathogenic.
Conclusions: Our results demonstrate that FUS mutations cause
4% of familial amyotrophic lateral sclerosis cases in the Italian population.
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