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Mutations in prickle orthologs cause seizures in flies, mice, and humans
Authors:Tao Hirotaka  Manak J Robert  Sowers Levi  Mei Xue  Kiyonari Hiroshi  Abe Takaya  Dahdaleh Nader S  Yang Tian  Wu Shu  Chen Shan  Fox Mark H  Gurnett Christina  Montine Thomas  Bird Thomas  Shaffer Lisa G  Rosenfeld Jill A  McConnell Juliann  Madan-Khetarpal Suneeta  Berry-Kravis Elizabeth  Griesbach Hilary  Saneto Russell P  Scott Matthew P  Antic Dragana  Reed Jordan  Boland Riley  Ehaideb Salleh N  El-Shanti Hatem  Mahajan Vinit B  Ferguson Polly J  Axelrod Jeffrey D  Lehesjoki Anna-Elina  Fritzsch Bernd  Slusarski Diane C  Wemmie John  Ueno Naoto  Bassuk Alexander G
Affiliation:1Division of Morphogenesis, National institute for Basic Biology, 38 Nishigonaka, Myodaiji, Okazaki 444-8585, Japan;2Department of Biology, University of Iowa, Iowa City, Iowa 52242, USA;3Department of Pediatrics, The University of Iowa Carver College of Medicine, Iowa City, Iowa 52242, USA;4Laboratory for Animal Resources and Genetic Engineering, RIKEN Center for Developmental Biology, 2-2-3 Minatojima-minamimachi, Chuo-ku, Kobe 650-047, Japan;5Department of Neurosurgery, The University of Iowa Carver College of Medicine, Iowa City, Iowa 52242, USA;6Department of Pediatrics, The University of Iowa Carver College of Medicine, Iowa City, Iowa 52242, USA;7Department of Neurology, Washington University, St. Louis, MO 63310, USA;8Department of Pathology, University of Washington, Seattle, WA 98104, USA;9University of Washington, Veterans Affairs Puget Sound Health Care System, Seattle, WA 98104, USA;10Signature Genomic Laboratories, Spokane, WA 99202, USA;11Children's Hospital of Pittsburgh UPMC, Medical Genetics, 4401 Penn Avenue, Pittsburgh, PA 15224, USA;12Departments of Pediatrics, Neurological Sciences and Biochemistry, Rush Medical Center, 1725 West Harrison St, Suite 718, Chicago, IL 60612, USA;13Division of Pediatric Neurology, Seattle Children's Hospital, Seattle, WA 98105, USA;14Departments of Developmental Biology, Genetics, and Bioengineering, Howard Hughes Medical Institute, Stanford University School of Medicine, 300 Pasteur Drive, Stanford, CA 94305, USA;15Department of Pathology, Stanford University School of Medicine, 300 Pasteur Drive, Stanford, CA 94305, USA;16Shafallah Medical Genetics Center, 69 Lusail St. West Bay Area, P.O. Box 33123, Doha 33123, Qatar;17Department of Pediatrics, the University of Iowa Carver College of Medicine, Iowa City, IA, USA 52242;18Department of Ophthalmology and Visual Sciences, The University of Iowa Carver College of Medicine, Iowa City, IA 52242, USA;19Folkhalsan Institute of Genetics and Neuroscience Center, University of Helsinki, Helsinki 00014, Finland;20Departments of Psychiatry and Neurosurgery, Neuroscience Program, Roy J. and Lucille A. Carver College of Medicine, University of Iowa, IA City, IA 52242;21Department of Veterans Affairs Medical Center, Iowa City, IA 52242, USA;22Department of Basic Biology, School of Life Science, Graduate University of Advanced Studies (SOKENDAI), 38 Nishigonaka, Myodaiji, Okazaki 444-8585, Japan;23Department of Pediatrics, The University of Iowa Carver College of Medicine, 25 S. Grand Avenue, 2044 Medical Lab Building, Iowa City, IA 52242, USA
Abstract:Epilepsy is heritable, yet few causative gene mutations have been identified, and thus far no human epilepsy gene mutations have been found to produce seizures in invertebrates. Here we show that mutations in prickle genes are associated with seizures in humans, mice, and flies. We identified human epilepsy patients with heterozygous mutations in either PRICKLE1 or PRICKLE2. In overexpression assays in zebrafish, prickle mutations resulted in aberrant prickle function. A seizure phenotype was present in the Prickle1-null mutant mouse, two Prickle1 point mutant (missense and nonsense) mice, and a Prickle2-null mutant mouse. Drosophila with prickle mutations displayed seizures that were responsive to anti-epileptic medication, and homozygous mutant embryos showed neuronal defects. These results suggest that prickle mutations have caused seizures throughout evolution.
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