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*These authors contributed equally to this work.
From Molecular Medicine and Neurology (Drs. Tessa, Patrono, Bertini, and Santorelli), IRCCSBambino Gesú Hospital, Rome; Department of Clinical Neurology (Drs. Casali, Damiano, Cricchi, Nappi, Amabile, and Santorelli), ORL and Rehabilitation, "La Sapienza" University, Rome; Neuromuscular Service (Dr. Bruno), Department of Pediatrics, IRCCSG. Gaslini, University of Genova; and Molecular Neurogenetics, Center of Experimental Neurobiology (Drs. Fortini and Nappi, and M. Valoppi), IRCCSMondinoTor VergataS. Lucia, Rome, Italy.
Address correspondence and reprint requests to Dr. F.M. Santorelli, Molecular Medicine and Neurology, IRCCSBambino Gesù Hospital, Piazza S. Onofrio 4, 00165 Rome, Italy; e-mail: fms3{at}na.flashnet.it
The authors report on a novel frameshift mutation (c.1688insA) in the SPG3A gene resulting in premature translation termination of the gene product atlastin. These data add a new variant to the second disease gene in autosomal dominant hereditary spastic paraplegia (ADHSP) and lend definitive support to its causative role. By combining direct testing of SPAST and SPG3A, at least 50% of ADHSP families can now receive appropriate genetic diagnosis.
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