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<article 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" xmlns:ali="http://www.niso.org/schemas/ali/1.0/" article-type="other" dtd-version="1.2" xml:lang="en"><front><journal-meta><journal-id journal-id-type="publisher-id">Russian Journal of Child Neurology</journal-id><journal-title-group><journal-title xml:lang="en">Russian Journal of Child Neurology</journal-title><trans-title-group xml:lang="ru"><trans-title>Русский журнал детской неврологии</trans-title></trans-title-group></journal-title-group><issn publication-format="print">2073-8803</issn><issn publication-format="electronic">2412-9178</issn><publisher><publisher-name xml:lang="en">Publishing House ABV Press</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">360</article-id><article-id pub-id-type="doi">10.17650/2073-8803-2021-16-1-2-10-41</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>ORIGINAL REPORTS</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>ОРИГИНАЛЬНЫЕ СТАТЬИ</subject></subj-group><subj-group subj-group-type="article-type"><subject></subject></subj-group></article-categories><title-group><article-title xml:lang="en">Genetic epilepsy caused by CDKL5 gene mutations as an example of epileptic encephalopathy and developmental encephalopathy: literature review and own observations</article-title><trans-title-group xml:lang="ru"><trans-title>генетическая эпилепсия, вызванная мутациями в гене CDKL5, как пример эпилептической энцефалопатии и энцефалопатии развития: обзор литературы и собственные наблюдения</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-8855-7740</contrib-id><name-alternatives><name xml:lang="en"><surname>Mukhin</surname><given-names>K. Yu.</given-names></name><name xml:lang="ru"><surname>Мухин</surname><given-names>К. Ю.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p><bold>Konstantin Yuryevich Mukhin </bold></p><p>5 Nagornaya St., Troitsk, Moscow 108840</p><p>9 Akad. Anokhina St., Moscow 119571</p></bio><bio xml:lang="ru"><p><bold>Константин Юрьевич Мухин</bold> </p><p>108841 Москва, Троицк, ул. Нагорная, 5</p><p>119579 Москва, ул. Акад. Анохина, 9</p></bio><email>center@epileptologist.ru</email><xref ref-type="aff" rid="aff1"/><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-9050-2036</contrib-id><name-alternatives><name xml:lang="en"><surname>Pylaeva</surname><given-names>O. A.</given-names></name><name xml:lang="ru"><surname>Пылаева</surname><given-names>О. А.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p><bold>Olga Anatolyevna Pylaeva </bold></p><p>5 Nagornaya St., Troitsk, Moscow 108840</p><p>9 Akad. Anokhina St., Moscow 119571</p></bio><bio xml:lang="ru"><p><bold>Ольга Анатольевна Пылаева</bold>  </p><p>108841 Москва, Троицк, ул. Нагорная, 5</p><p>119579 Москва, ул. Акад. Анохина, 9</p></bio><email>olgapylaeva@yandex.ru</email><xref ref-type="aff" rid="aff1"/><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-6125-0618</contrib-id><name-alternatives><name xml:lang="en"><surname>Bobylova</surname><given-names>M. Yu.</given-names></name><name xml:lang="ru"><surname>Бобылова</surname><given-names>М. Ю.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>5 Nagornaya St., Troitsk, Moscow 108840</p><p>9 Akad. Anokhina St., Moscow 119571</p></bio><bio xml:lang="ru"><p>108841 Москва, Троицк, ул. Нагорная, 5</p><p>119579 Москва, ул. Акад. Анохина, 9</p></bio><xref ref-type="aff" rid="aff1"/><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Chadaev</surname><given-names>V. A.</given-names></name><name xml:lang="ru"><surname>Чадаев</surname><given-names>В. А.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>9 Akad. Anokhina St., Moscow 119571</p></bio><bio xml:lang="ru"><p>119579 Москва, ул. Акад. Анохина, 9</p></bio><xref ref-type="aff" rid="aff2"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Svt. Luka’s Institute of Child Neurology and Epilepsy</institution></aff><aff><institution xml:lang="ru">ООО «Институт детской неврологии и эпилепсии им. Свт. Луки»</institution></aff></aff-alternatives><aff-alternatives id="aff2"><aff><institution xml:lang="en">Svt. Luka’s Institute of Pediatric and Adult Neurology and Epilepsy</institution></aff><aff><institution xml:lang="ru">ООО «Институт детской и взрослой неврологии и эпилепсии им. Свт. Луки»</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2021-04-15" publication-format="electronic"><day>15</day><month>04</month><year>2021</year></pub-date><volume>16</volume><issue>1-2</issue><issue-title xml:lang="en"/><issue-title xml:lang="ru"/><fpage>10</fpage><lpage>41</lpage><history><date date-type="received" iso-8601-date="2021-07-30"><day>30</day><month>07</month><year>2021</year></date><date date-type="accepted" iso-8601-date="2021-07-30"><day>30</day><month>07</month><year>2021</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2021, ABV-Press</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2021, АБВ-пресс</copyright-statement><copyright-year>2021</copyright-year><copyright-holder xml:lang="en">ABV-Press</copyright-holder><copyright-holder xml:lang="ru">АБВ-пресс</copyright-holder><ali:free_to_read xmlns:ali="http://www.niso.org/schemas/ali/1.0/"/><license><ali:license_ref xmlns:ali="http://www.niso.org/schemas/ali/1.0/">https://rjdn.abvpress.ru/jour/about/editorialPolicies</ali:license_ref></license></permissions><self-uri xlink:href="https://rjdn.abvpress.ru/jour/article/view/360">https://rjdn.abvpress.ru/jour/article/view/360</self-uri><abstract xml:lang="en"><p>The disease caused by mutations in the CDKL5 gene (encoding cyclin-dependent kinase 5, CDK5) belongs to the group of early (infantile) epileptic encephalopathies caused by alterations in the genome. Currently, the disease is called “developmental encephalopathy and epileptic encephalopathy type 2”. This disorder is a complex combination of symptoms that develop due to deficiency or absence of the CDKL5 gene product, which is serine/threonine kinase. The CDKL5 gene is located on X chromosome; the disease has an X-linked dominant inheritance pattern. This literature review summarizes relevant studies analyzing the disease caused by CDKL5 gene mutations, including its genetic and epidemiological aspects, clinical manifestations, characteristics of epilepsy, principles of diagnosis, and therapeutic approaches. We present a case series of several patients with genetic disorders involving the CDKL5 gene.</p></abstract><trans-abstract xml:lang="ru"><p>Заболевание, вызванное мутациями в гене CDKL5 (циклинзависимая киназа 5-го типа (cyclin-dependent kinase 5, CDK5), относится к группе ранних (младенческих) эпилептических энцефалопатий, обусловленных генетическими причинами. В настоящее время заболевание носит название «энцефалопатия развития и эпилептическая энцефалопатия 2-го типа». Данное заболевание представляет собой сложный симптомокомплекс, который формируется при дефиците или полном отсутствии в организме продукта гена CDKL5 (фермента серин-треонин киназы). ген CDKL5 локализован на Х-хромосоме, заболевание имеет Х-сцепленный доминантный тип наследования. Авторы представляют обзор современной литературы, посвященный заболеванию, вызванному мутацией в гене CDKL5 (включая генетические и эпидемиологические аспекты, клинические проявления, особенности течения эпилепсии, принципы диагностики, терапевтические подходы), а также описание собственных наблюдений пациентов с генетическими нарушениями с участием гена CDKL5.</p></trans-abstract><kwd-group xml:lang="en"><kwd>epileptic encephalopathy</kwd><kwd>developmental encephalopathy</kwd><kwd>early epileptic encephalopathy</kwd><kwd>CDKL5 gene</kwd><kwd>epilepsy</kwd><kwd>clinical manifestations</kwd><kwd>diagnosis</kwd><kwd>therapy</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>эпилептическая энцефалопатия</kwd><kwd>энцефалопатия развития</kwd><kwd>ранняя эпилептическая энцефалопатия</kwd><kwd>ген CDKL5</kwd><kwd>эпилепсия</kwd><kwd>клинические проявления</kwd><kwd>диагностика</kwd><kwd>терапия</kwd></kwd-group><funding-group/></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><citation-alternatives><mixed-citation xml:lang="en">1. 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