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<article article-type="research-article" dtd-version="1.3" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xml:lang="en"><front><journal-meta><journal-id journal-id-type="publisher-id">epilepsia</journal-id><journal-title-group><journal-title xml:lang="en">Epilepsy and paroxysmal conditions</journal-title><trans-title-group xml:lang="ru"><trans-title>Эпилепсия и пароксизмальные состояния</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2077-8333</issn><issn pub-type="epub">2311-4088</issn><publisher><publisher-name>IRBIS LLC</publisher-name></publisher></journal-meta><article-meta><article-id custom-type="elpub" pub-id-type="custom">epilepsia-167</article-id><article-categories><subj-group subj-group-type="heading"><subject>Research Article</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>CLINICAL CASES</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="ru"><subject>КЛИНИЧЕСКИЕ СЛУЧАИ</subject></subj-group></article-categories><title-group><article-title>SEVERE EPILEPTIC ENCEPHALOPATHY OF EARLY CHILDHOOD DUE TO SCN2A MUTATION</article-title><trans-title-group xml:lang="ru"><trans-title>ТЯЖЕЛАЯ ЭПИЛЕПТИЧЕСКАЯ ЭНЦЕФАЛОПАТИЯ РАННЕГО ДЕТСКОГО ВОЗРАСТА, АССОЦИИРОВАННАЯ С МУТАЦИЕЙ В ГЕНЕ SCN2A</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Бахтин</surname><given-names>И. С.</given-names></name><name name-style="western" xml:lang="en"><surname>Bachtin</surname><given-names>I. S.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Бахтин Игорь Станиславович – врач психоневрологического отделения. </p><p>Адрес: ул. Площадь Победы, д. 1, г. Краснодар, Краснодарский край, 350000,</p></bio><bio xml:lang="en"><p>Bahtin Igor’ Stanislavovich – MD, Department of psychoneurogy.</p><p>Аddress: Plosad Pobedi, 1, Krasnodar, 350000, Russia. </p></bio><email xlink:type="simple">bahis@rambler.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Белоусова</surname><given-names>Е. Д.</given-names></name><name name-style="western" xml:lang="en"><surname>Belousova</surname><given-names>E. D.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Белоусова Елена Дмитриевна – профессор, доктор медицинских наук, заведующая отделом психоневрологии и эпилептологии ОСП «НИКИ педиатрии». </p><p>Адрес: ул. Талдомская, д. 2, Москва, 125412.</p></bio><bio xml:lang="en"><p>Belousova Elena Dmitrievna – MD, PHD, professor, Head of the Department of psychoneurology and epileptology Research and Clincal Institute of Pediatrics. </p><p>Аddress: Taldomskaya str. 2,Moscow, 127412,Russia.</p></bio><email xlink:type="simple">ebelousova@inbox.ru</email><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Шаталов</surname><given-names>П. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Shatalov</surname><given-names>P. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Шаталов Петр Алексеевич – кандидат биологических наук, НИЛ ОСП «НИКИ педиатрии» ГБОУ ВПО «РНИМУ им. Н.Н. Пирогова»; ; руководитель отдела диагностики наследственных заболеваний ООО «Генотек».</p><p>Адрес: Андроновское шоссе, д. 26, к. 6, 3-й этаж, 111024, Москва</p></bio><bio xml:lang="en"><p>Shatalov Petr Alekseevich – PHD, Head of the Genetic Department Genotek. </p><p>Аddress: Andronovskoe Shosse street, 26 b. 6, Moscow, 111024, Russia. </p></bio><email xlink:type="simple">shatalov.peter@gmail.com</email><xref ref-type="aff" rid="aff-3"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Айвазян</surname><given-names>С. О.</given-names></name><name name-style="western" xml:lang="en"><surname>Ayvazyan</surname><given-names>S. O.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Айвазян Сергей Оганесович – кандидат медицинских наук, руководитель отдела эпилептологии и лаборатории видео-ЭЭГ-мониторинга. </p><p>Адрес: ул. Шаболовка, 34, стр. 2, Москва, 115419.</p></bio><bio xml:lang="en"><p>Ajvazjan Sergej Oganesovich – PhD, Head of epileptology department and unit of video-EEG monitoring.</p><p>Аddress: Shabolovka str., 34, Moscow, 115419, Russia. </p></bio><email xlink:type="simple">soayvaz@gmail.com</email><xref ref-type="aff" rid="aff-4"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Детская краевая клиническая больница, Краснодар</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Krasnodar Regional Pediatric Hospital</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Российский национальный исследовательский медицинский университет имени Н.И. Пирогова, Москва</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Pirogov Russian National Research Medical University, Moscow</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-3"><aff xml:lang="ru"><institution>Российский национальный исследовательский медицинский университет имени Н.И. Пирогова, Москва; &#13;
Компания Genotek, Москва</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Pirogov Russian National Research Medical University, Moscow; &#13;
Genotek inc., Moscow</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-4"><aff xml:lang="ru"><institution>Медицинский центр «Невромед», Москва</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Medical Center “Nevromed”, Moscow</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2015</year></pub-date><pub-date pub-type="epub"><day>11</day><month>06</month><year>2016</year></pub-date><volume>7</volume><issue>1</issue><fpage>35</fpage><lpage>40</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Bachtin I.S., Belousova E.D., Shatalov P.A., Ayvazyan S.O., 2016</copyright-statement><copyright-year>2016</copyright-year><copyright-holder xml:lang="ru">Бахтин И.С., Белоусова Е.Д., Шаталов П.А., Айвазян С.О.</copyright-holder><copyright-holder xml:lang="en">Bachtin I.S., Belousova E.D., Shatalov P.A., Ayvazyan S.O.</copyright-holder><license xml:lang="ru" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>Данная работа распространяется под лицензией Creative Commons Attribution 4.0.</license-p></license><license xml:lang="en" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>This work is licensed under a Creative Commons Attribution 4.0 License.</license-p></license></permissions><self-uri xlink:href="https://www.epilepsia.su/jour/article/view/167">https://www.epilepsia.su/jour/article/view/167</self-uri><abstract><p>SCN2A mutations are traditionally described in benign infantile seizures. We are describing rather rare case of epileptic encephalopathy associated with incertion of ctg/ctGg in SCN2A. The female child was born at term by normal delivery after non-complicated pregnancy. Seizures started when she was 3 months old as focal tonic, later on myoclonic seizures developed. They were refractory to all used antiepileptic drugs including valproic acid, topiramate, lamotrigine, ethosuximide and tetracoside. At age of two child is mentally retarded and autistic, unable to walk (because of muscular hypotonia), has no active speech and still has asymmetrical tonic and myoclonic seizures. Unspecific modest brain atrophy was revealed by MRI. Metabolic screening, including urine and serum amino acids, organic acids, lactate, was normal. Our case (alongside with others depicted in literature) confirms that spectrum of phenotypes, associated with mutations in SCN2A, is very wide – from benign infantile seizures to severe epileptic encephalopaties leading to mental retardation, motor and speech disorders.</p></abstract><trans-abstract xml:lang="ru"><p>Приведено описание клинического случая неклассифицированной эпилептической энцефалопатии раннего детского возраста. Эпилептические приступы начались в возрасте 2,5 мес., имели фокальный характер, сопровождались грубой задержкой психомоторного и речевого развития, оказались резистентны по отношению к антиэпилептической терапии. На межприступной ЭЭГ обнаруживалась модифицированная (синхронизированная) гипсаритмия. Обнаружена мутация в гене SCN2A второй хромосомы в виде инсерции ctg/ctGg в гетерозиготном состоянии. Мутация приводила к сдвигу рамки считывания после 1825 экзонов. Мутации в гене SCN2A ранее описывались как причина развития доброкачественных судорог младенчества. Но в последние годы данная мутация стала описываться и как причина развития эпилептических энцефалопатий – синдромов Отахара и Веста, а также неклассифицированных эпилептических энцефалопатий раннего детского возраста. Описание клинического случая добавляет данных в «копилку» знаний о клинических проявлениях, связанных с мутациями гена SCN2A, и показывает, насколько широк спектр эпилепсий, ими вызываемых.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>эпилептическая энцефалопатия раннего детского возраста</kwd><kwd>ген SCN2A.</kwd></kwd-group><kwd-group xml:lang="en"><kwd>epileptic encephalopathy</kwd><kwd>infant</kwd><kwd>SCN2A mutation</kwd></kwd-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Baasch A.L., Huning I., Gilissen C. et al. 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