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De novo mutations in ATP1A3 cause alternating hemiplegia of childhood

2012; Nature Portfolio; Volume: 44; Issue: 9 Linguagem: Inglês

10.1038/ng.2358

1546-1718

Erin L. Heinzen, Kathryn J. Swoboda, Yuki Hitomi, Fiorella Gurrieri, Sophie Nicole, Boukje de Vries, Francesco Danilo Tiziano, Bertrand Fontaine, Sophie Nicole, Sinéad B. Heavin, Eleni Panagiotakaki, Sophie Nicole, Fiorella Gurrieri, Giovanni Neri, Boukje de Vries, Stephany C Koelewijn, Jessica T. Kamphorst, Marije A. Geilenkirchen, Nadine Pelzer, Laura Laan, Joost Haan, Michel D. Ferrari, Arn van den Maagdenberg, Claudio Zucca, Maria Teresa Bassi, F Franchini, Rosaria Vavassori, Melania Giannotta, Giuseppe Gobbi, Tiziana Granata, Nardo Nardocci, Elisa De Grandis, E. Veneselli, Michela Stagnaro, Fiorella Gurrieri, Giovanni Neri, Federico Vigevano, Eleni Panagiotakaki, Claudia Oechsler, Alexis Arzimanoglou, Sophie Nicole, Melania Giannotta, Giuseppe Gobbi, Miriam Ninan, Brian Neville, Friedrich Ebinger, Carmen Fons, Jaume Campistol, David Kemlink, Soňa Nevšímalová, Laura Laan, Cacha Peeters‐Scholte, Arn van den Maagdenberg, Paul Casaer, Giorgio Casari, Guenter Sange, Georg Spiel, Filippo Martinelli Boneschi, Claudio Zucca, Maria Teresa Bassi, Tsveta Schyns, Francis P. Crawley, Dominique Poncelin, Rosaria Vavassori, Stefania Fiori, Emanuela Abiusi, Lorena Di Pietro, Matthew Sweney, Tara Newcomb, Louis Viollet, Chad Huff, Lynn B. Jorde, Sandra P. Reyna, Kelley J. Murphy, Kevin V. Shianna, Curtis Gumbs, Latasha Little, Kenneth Silver, Louis J. Ptáček, Joost Haan, Michel D. Ferrari, Ann Bye, Geoffrey Herkes, Charlotte M Whitelaw, David Webb, Bryan J. Lynch, Peter Uldall, Mary D. King, Ingrid E. Scheffer, Giovanni Neri, Alexis Arzimanoglou, Arn M. J. M. van den Maagdenberg, Sanjay M. Sisodiya, Mohamad A. Mikati, David B. Goldstein,

Renal and related cancers

Alternating hemiplegia of childhood (AHC) is a rare, severe neurodevelopmental syndrome characterized by recurrent hemiplegic episodes and distinct neurological manifestations. AHC is usually a sporadic disorder and has unknown etiology. We used exome sequencing of seven patients with AHC and their unaffected parents to identify de novo nonsynonymous mutations in ATP1A3 in all seven individuals. In a subsequent sequence analysis of ATP1A3 in 98 other patients with AHC, we found that ATP1A3 mutations were likely to be responsible for at least 74% of the cases; we also identified one inherited mutation in a case of familial AHC. Notably, most AHC cases are caused by one of seven recurrent ATP1A3 mutations, one of which was observed in 36 patients. Unlike ATP1A3 mutations that cause rapid-onset dystonia-parkinsonism, AHC-causing mutations in this gene caused consistent reductions in ATPase activity without affecting the level of protein expression. This work identifies de novo ATP1A3 mutations as the primary cause of AHC and offers insight into disease pathophysiology by expanding the spectrum of phenotypes associated with mutations in ATP1A3.