BACKGROUND: Alternating hemiplegia of childhood and rapid-onset dystonia parkinsonism are two separate movement disorders with different dominant mutations in the same sodium-potassium transporter ATPase subunit gene, ATP1A3. PATIENT: We present a child with topiramate-responsive alternating hemiplegia of childhood who was tested for an ATP1A3 gene mutation. RESULTS: Gene sequencing revealed an identical ATP1A3 mutation as in three typical adult-onset rapid-onset dystonia parkinsonism cases but never previously described in an alternating hemiplegia of childhood case. CONCLUSION: The discordance of these phenotypes suggests that there are other undiscovered environmental, genetic, or epigenetic factors influencing the development of alternating hemiplegia of childhood or rapid-onset dystonia parkinsonism.
BACKGROUND: Alternating hemiplegia of childhood and rapid-onset dystonia parkinsonism are two separate movement disorders with different dominant mutations in the same sodium-potassium transporter ATPase subunit gene, ATP1A3. PATIENT: We present a child with topiramate-responsive alternating hemiplegia of childhood who was tested for an ATP1A3 gene mutation. RESULTS: Gene sequencing revealed an identical ATP1A3 mutation as in three typical adult-onset rapid-onset dystonia parkinsonism cases but never previously described in an alternating hemiplegia of childhood case. CONCLUSION: The discordance of these phenotypes suggests that there are other undiscovered environmental, genetic, or epigenetic factors influencing the development of alternating hemiplegia of childhood or rapid-onset dystonia parkinsonism.
Authors: Eleni Panagiotakaki; Elisa De Grandis; Michela Stagnaro; Erin L Heinzen; Carmen Fons; Sanjay Sisodiya; Boukje de Vries; Christophe Goubau; Sarah Weckhuysen; David Kemlink; Ingrid Scheffer; Gaëtan Lesca; Muriel Rabilloud; Amna Klich; Alia Ramirez-Camacho; Adriana Ulate-Campos; Jaume Campistol; Melania Giannotta; Marie-Laure Moutard; Diane Doummar; Cecile Hubsch-Bonneaud; Fatima Jaffer; Helen Cross; Fiorella Gurrieri; Danilo Tiziano; Sona Nevsimalova; Sophie Nicole; Brian Neville; Arn M J M van den Maagdenberg; Mohamad Mikati; David B Goldstein; Rosaria Vavassori; Alexis Arzimanoglou Journal: Orphanet J Rare Dis Date: 2015-09-26 Impact factor: 4.123
Authors: Paula F Kinoshita; Jacqueline A Leite; Ana Maria M Orellana; Andrea R Vasconcelos; Luis E M Quintas; Elisa M Kawamoto; Cristoforo Scavone Journal: Front Physiol Date: 2016-06-02 Impact factor: 4.566