アブストラクト
Japanese
Title | 電位依存性ナトリウムイオンチャネルとてんかん |
---|---|
Subtitle | 総説 |
Authors | 石井敦士 |
Authors (kana) | |
Organization | 福岡大学医学部小児科 |
Journal | 脳と発達 |
Volume | 53 |
Number | 1 |
Page | 5-9 |
Year/Month | 2021 / 1 |
Article | 報告 |
Publisher | 日本小児神経学会 |
Abstract | 「要旨」てんかんは何らかの要因により, 脳神経細胞の興奮と抑制の均衡が破綻し, 脳神経細胞の過剰な興奮による. 電位依存性ナトリウムイオン(Na+)チャネルは神経細胞での伝導調整を担い, てんかんの発症に大きく関与する. てんかんでの異常が報告されている電位依存性Na+チャネルをコードする遺伝子は, SCN1A, SCN2A, SCN3A, SCN8Aの4つの遺伝子である. SCN1Aは素因性てんかん熱性けいれんプラス, SCN2Aは良性(家族性)新生児乳児てんかんと比較的軽症なてんかんにおいて病的バリアントが見られる. 一方で, いずれも重症な発達性てんかん性脳症においても病的バリアントを認める. 本項では, これら4つの遺伝子の異常と, それによる表現型について最新の知見を踏まえて解説する. |
Practice | 臨床医学:内科系 |
Keywords | 電位依存性ナトリウムイオンチャネル, てんかん, Dravet症候群, 発達性てんかん性脳症, 片麻痺性片頭痛 |
English
Title | Voltage gated sodium ion channel and epilepsy |
---|---|
Subtitle | |
Authors | Atsushi Ishii |
Authors (kana) | |
Organization | Department of Pediatrics, Fukuoka University |
Journal | NO TO HATTATSU (Official Journal of The Japanese Society of Child Neurology) |
Volume | 53 |
Number | 1 |
Page | 5-9 |
Year/Month | 2021 / 1 |
Article | Report |
Publisher | The Japanese Society of Child Neurology |
Abstract | Epilepsy is caused by the excessive excitation of neurons due to alterations in the excitation and inhibition balance caused by various factors. Voltage-gated sodium ion (Na+) channels are responsible for regulating conduction in neurons and play a major role in the development of epilepsy. The genes that code for voltage-gated Na+ channels, abnormalities of which have been reported in epilepsy patients, include SCN1A, SCN2A, SCN3A and SCN8A. Pathological variants of SCN1A are seen in genetic forms of epilepsy with febrile seizures plus, and variants of SCN2A are seen in benign (familial) neonatal-infantile epilepsy and relatively mild epilepsy. Meanwhile, pathological variants or all of these genes are observed in severe developmental epileptic encephalopathy. Here, abnormalities of these four genes and their phenotypes are described based on the latest findings. |
Practice | Clinical internal medicine |
Keywords |
- 全文ダウンロード: 従量制、基本料金制の方共に770円(税込) です。
参考文献
- 1) Scheffer IE, Berkovic SF. Generalized epilepsy with febrile seizures plus. A genetic disorder with heterogeneous clinical phenotypes. Brain 1997;120:479-90.
- 2) Wallace RH, Wallg DW, Singh R, et al, Febrile seizures and generalized epilepsy associated with a mutation in the Na+-channel betal subunit gene SCNIB. Nat Genet 1998;19:366-70.
- 3) Escayg A, MacDonald BT, Meisler MH, et al. Mutations of SCNIA, encoding a neuronal sodium channel, in two families with GEFS+2. Nat Genet 2000;24:343-5.
- 4) Claes LR, Deprez L, Suls A, et al. The SCN1A variant database:a novel research and diagnostic tool. Hum Mutat 2009;30:E904-20.
- 5) Lossin C. A catalog of SCN1A variams. Brain Dev 2009;31:114-30.
残りの17件を表示する
- 6) Bonanni P, Malcarne M, Moro F, et al. Generalized epilepsy with febrile seizures plus(GEFS+):clinical spectrum in seven Italian families unrelated to SCN1A, SCN1B, and GABRG2 gene mutations. Epilepsia 2004;45:149-58.
- 7) Dravet C. Les epilepsies graves de l'enfant. Vie Med 1978;8:543-8.
- 8) Ishii A, Watkins JC, Chen D, Hirose S, Hammer MF. Clinical implica-tions of SCN1A missense and truncation variants in a large Japanese cohort with Dravet syndrome. Epilepsia 2017;58:282-90.
- 9) Skluzacek JV, Watts KP, Parsy O, Wical B, Camfield P. Dravet syndrome and parent associations:the IDEA League experience with comorbid conditions, mortality, management, adaptation, and grief. Epilepsia 2011;52 Suppl 2:95-101.
- 10) Berecki G, Bryson A, Terhag J, et al. SCN1A gain of function in early infantile encephalopathy. Ann Neurol 2019;85:514-25.
- 11) Schubert V, Auffenberg E, Biskup S, Jurkat-Rott K, Freilinger T. Two novel families with hemiplegic migraine caused by recurrent SCN1A mutation p. F1499L. Cephalagia 2018;38:1503-8.
- 12) Kamiya K, Kaneda M, Sugawara T, et al. A nonsense mutation of the sodium channel gene SCN2A in a patient with intractable epilepsy and mental decline, J Neurosci 2004;24:2690-8.
- 13) Kearney JA, Plummer NW, Smith MR, et al. A gain-of-function mutation in the sodium channel gene Scn2a results in seizures and behavioral abnormalities. Neuroscience 2001:102:307-17.
- 14) Sanders SJ, Murtha MT, Gupta AR, et al. De novo mutations revealed by whole-exome sequencing are strongly associated with autism. Nature 2012;485:237-41.
- 15) Vanoye CG, Gurnett CA, Holland KD, George AL Jr, Kearney JA. Novel SCN3A variants associated with focal epilepsy in children. Neurobiol Dis 2014;62:313-22.
- 16) Estacion M, Gasser A, Dib-Hajj SD, Waxman SG. A sodium channel mutation linked to epilepsy increases ramp and persistent current of Nav 1.3 and induces hyperexcitability in hippocampal neurons. Exp Neu-rol 2010;224:362-8.
- 17) Zaman T, Helbig I, Bozovic IB, et al. Mutations in SCN3A cause early infantile epileptic encephalopathy. Ann Neurol 2018;83:703-17.
- 18) Trudeau MM, Dalton JC, Day JW, Ranum LP, Meisler MH. Heterozy-gosity for a protein truncation mutation of sodium channel SCN8A in a patient with cerebellar atrophy, ataxia, and mental retardation. J Med Genet 2006;43:527-30.
- 19) Veeramah KR, O'Brien JE, Meisler MH, et al. De novo pathogenic SCN8A mutation identified by whole-genome sequencing of a family quartet affected by infantile epileptic encephalopathy and SUDEP. Am J Hum Genet 2012;90:502-10.
- 20) Meisler MH, Helman G, Hammer MF, et al. SCN8A encephalopathy:Research progress and prospects. Epilepsia 2016;57:1027-35.
- 21) Schreiber JM, Tochen L, Brown M, et al,:A multi-disciplinary clinic for SCN8A-related epilepsy. Epilepsy Res 2020;159:106261.
- 22) Gardella E, Becker F, Moller RS, et al. Benign infantile seizures and paroxysmal dyskinesia caused by an SCN8A mutation. Ann Neurol 2016;79:428-36.