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Okubo Y, Shibuya M, Nakamura H, Kawashima A, Kodama K, Endo W, Inui T, Togashi N, Aihara Y, Shirota M, Funayama R, Niihori T, Fujita A, Nakayama K, Aoki Y, Matsumoto N, Kure S, Kikuchi A, Haginoya K. Neonatal developmental and epileptic encephalopathy with movement disorders and arthrogryposis: A case report with a novel missense variant of SCN1A. Brain Dev 2023; 45:505-511. [PMID: 37442734 DOI: 10.1016/j.braindev.2023.06.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/15/2022] [Revised: 06/28/2023] [Accepted: 06/29/2023] [Indexed: 07/15/2023]
Abstract
Variants of SCN1A represent the archetypal channelopathy associated with several epilepsy syndromes. The clinical phenotypes have recently expanded from Dravet syndrome. CASE REPORT: We present a female patient with the de novo SCN1A missense variant, c.5340G > A (p. Met1780Ile). The patient had various clinical features with neonatal onset SCN1A epileptic encephalopathy, arthrogryposis multiplex congenita, thoracic hypoplasia, thoracic scoliosis, and hyperekplexia. CONCLUSION: Our findings are compatible with neonatal developmental and epileptic encephalopathy with movement disorders and arthrogryposis; the most severe phenotype probably caused by gain-of-function variant of SCN1A. The efficacy of sodium channel blocker was also discussed. Further exploration of the phenotype-genotype relationship of SCN1A variants may lead to better pharmacological treatments and family guidance.
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Affiliation(s)
- Yukimune Okubo
- Department of Pediatric Neurology, Miyagi Children's Hospital, Sendai 989-3126, Japan.
| | - Moriei Shibuya
- Department of Pediatric Neurology, Miyagi Children's Hospital, Sendai 989-3126, Japan
| | - Haruhiko Nakamura
- Department of Pediatric Neurology, Miyagi Children's Hospital, Sendai 989-3126, Japan
| | - Aritomo Kawashima
- Department of Pediatric Neurology, Miyagi Children's Hospital, Sendai 989-3126, Japan
| | - Kaori Kodama
- Department of Pediatric Neurology, Miyagi Children's Hospital, Sendai 989-3126, Japan
| | - Wakaba Endo
- Department of Pediatric Neurology, Miyagi Children's Hospital, Sendai 989-3126, Japan
| | - Takehiko Inui
- Department of Pediatric Neurology, Miyagi Children's Hospital, Sendai 989-3126, Japan
| | - Noriko Togashi
- Department of Pediatric Neurology, Miyagi Children's Hospital, Sendai 989-3126, Japan
| | - Yu Aihara
- Department of Pediatrics, Tohoku University School of Medicine, Sendai, Japan
| | - Matsuyuki Shirota
- Division of Interdisciplinary Medical Science, United Centers for Advanced Research and Translational Medicine, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Ryo Funayama
- Division of Cell Proliferation, United Centers for Advanced Research and Translational Medicine, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Tetsuya Niihori
- Department of Medical Genetics, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Atsushi Fujita
- Department of Human Genetics, Yokohama City University Graduate School of Medicine
| | - Keiko Nakayama
- Division of Cell Proliferation, United Centers for Advanced Research and Translational Medicine, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Yoko Aoki
- Department of Medical Genetics, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Naomichi Matsumoto
- Department of Human Genetics, Yokohama City University Graduate School of Medicine
| | - Shigeo Kure
- Department of Pediatric Neurology, Miyagi Children's Hospital, Sendai 989-3126, Japan; Department of Pediatrics, Tohoku University School of Medicine, Sendai, Japan
| | - Atsuo Kikuchi
- Department of Pediatrics, Tohoku University School of Medicine, Sendai, Japan
| | - Kazuhiro Haginoya
- Department of Pediatric Neurology, Miyagi Children's Hospital, Sendai 989-3126, Japan.
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