<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE article PUBLIC "-//NLM//DTD JATS (Z39.96) Journal Publishing DTD v1.3 20210610//EN" "JATS-journalpublishing1-3.dtd">
<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 pub-id-type="doi">10.17749/2077-8333/epi.par.con.2024.175</article-id><article-id custom-type="elpub" pub-id-type="custom">epilepsia-996</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>SEMA6B-related progressive myoclonus epilepsy in a patient with Klinefelter syndrome</article-title><trans-title-group xml:lang="ru"><trans-title>SEMA6B-ассоциированная прогрессирующая миоклонус-эпилепсия у пациента с синдромом Клайнфельтера</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-9101-5213</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Кожанова</surname><given-names>Т. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Kozhanova</surname><given-names>T. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Кожанова Татьяна Викторовна – к.м.н., ведущий научный сотрудник, врач – лабораторный генетик; доцент кафедры неврологии, нейрохирургии и медицинской генетики им. академика Л.О. Бадаляна педиатрического факультета</p><p>ул. Авиаторов, д. 38, Москва 119620, Россия</p><p>ул. Островитянова, д. 1, Москва 117997, Россия</p></bio><bio xml:lang="en"><p>Tatyana V. Kozhanova – MD, PhD, Leading Researcher, Laboratory Geneticist; Associate Professor, Chair of Neurology, Neurosurgery and Medical Genetics, Faculty of Pediatrics</p><p>38 Aviators Str., Moscow 119620, Russia</p><p>1 Ostrovityanov Str., Moscow 117997, Russia</p></bio><email xlink:type="simple">vkozhanov@bk.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-2400-0748</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Жилина</surname><given-names>С. С.</given-names></name><name name-style="western" xml:lang="en"><surname>Zhilina</surname><given-names>S. S.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Жилина Светлана Сергеевна – к.м.н., ведущий научный сотрудник, врач-генетик; доцент кафедры неврологии, нейрохирургии и медицинской генетики им. академика Л.О. Бадаляна педиатрического факультета</p><p>ул. Авиаторов, д. 38, Москва 119620, Россия</p><p>ул. Островитянова, д. 1, Москва 117997, Россия</p></bio><bio xml:lang="en"><p>Svetlana S. Zhilina – MD, PhD, Leading Researcher, Geneticist; Associate Professor, Chair of Neurology, Neurosurgery and Medical Genetics, Faculty of Pediatrics</p><p>38 Aviators Str., Moscow 119620, Russia</p><p>1 Ostrovityanov Str., Moscow 117997, Russia</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-6020-0758</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Мещерякова</surname><given-names>Т. И.</given-names></name><name name-style="western" xml:lang="en"><surname>Meshcheryakova</surname><given-names>T. I.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Мещерякова Татьяна Ивановна – к.м.н., ведущий научный сотрудник, врач-генетик; доцент кафедры общей и медицинской генетики медико-биологического факультета</p><p>ул. Авиаторов, д. 38, Москва 119620, Россия</p><p>ул. Островитянова, д. 1, Москва 117997, Россия</p></bio><bio xml:lang="en"><p>Tatiana I. Meshcheryakova – MD, PhD, Leading Researcher, Geneticist; Associate Professor, Chair of General and Medical Genetics, Faculty of Medicine and Biology</p><p>38 Aviators Str., Moscow 119620, Russia</p><p>1 Ostrovityanov Str., Moscow 117997, Russia</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-0688-8074</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Сушко</surname><given-names>Л. М.</given-names></name><name name-style="western" xml:lang="en"><surname>Sushko</surname><given-names>L. M.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Сушко Лилия Марленовна – врач-невролог</p><p>ул. Авиаторов, д. 38, Москва 119620, Россия</p></bio><bio xml:lang="en"><p>Lilia M. Sushko – Neurologist</p><p>38 Aviators Str., Moscow 119620, Russia</p></bio><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-5503-4529</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Осипова</surname><given-names>К. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Osipova</surname><given-names>K. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Осипова Карина Вартановна – к.м.н., заведующая психоневрологическим отделением № 1</p><p>ул. Авиаторов, д. 38, Москва 119620, Россия</p></bio><bio xml:lang="en"><p>Karina V. Osipova – MD, PhD, Head of Neuropsychiatric Department</p><p>38 Aviators Str., Moscow 119620, Russia</p></bio><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Мазур</surname><given-names>А. М.</given-names></name><name name-style="western" xml:lang="en"><surname>Mazur</surname><given-names>A. M.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Мазур Александр Михайлович – к.ф.-м.н., директор по науке</p><p>ул. Ленинские горы, вл. 1, стр. 77, Москва 119234, Россия</p></bio><bio xml:lang="en"><p>Aleksandr M. Mazur – PhD (Phys.-Math.), Director For Science</p><p>est. 1 bldg. 77 Leninskie Gory, Moscow 119234, Russia</p></bio><xref ref-type="aff" rid="aff-3"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Фоменко</surname><given-names>С. С.</given-names></name><name name-style="western" xml:lang="en"><surname>Fomenko</surname><given-names>S. S.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Фоменко Сергей Сергеевич – биоинформатик</p><p>ул. Ленинские горы, вл. 1, стр. 77, Москва 119234, Россия</p></bio><bio xml:lang="en"><p>Sergey S. Fomenko – Bioinformatics Specialist</p><p>est. 1 bldg. 77 Leninskie Gory, Moscow 119234, Russia</p></bio><xref ref-type="aff" rid="aff-3"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-4653-9867</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Крапивкин</surname><given-names>А. И.</given-names></name><name name-style="western" xml:lang="en"><surname>Krapivkin</surname><given-names>A. I.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Крапивкин Алексей Игоревич – д.м.н., директор</p><p>ул. Авиаторов, д. 38, Москва 119620, Россия</p></bio><bio xml:lang="en"><p>Alexey I. Krapivkin – Dr. Med. Sc., Director</p><p>38 Aviators Str., Moscow 119620, Russia</p></bio><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-0103-7422</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Заваденко</surname><given-names>Н. Н.</given-names></name><name name-style="western" xml:lang="en"><surname>Zavadenko</surname><given-names>N. N.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Заваденко Николай Николаевич – д.м.н., профессор, заведующий кафедрой неврологии, нейрохирургии и медицинской генетики им. академика Л.О. Бадаляна педиатрического факультета</p><p>ул. Островитянова, д. 1, Москва 117997, Россия</p></bio><bio xml:lang="en"><p>Nikolay N. Zavadenko – Dr. Med. Sc., Professor, Chief of Chair of Neurology, Neurosurgery and Medical Genetics, Faculty of Pediatrics</p><p>1 Ostrovityanov Str., Moscow 117997, Russia</p></bio><xref ref-type="aff" rid="aff-4"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Государственное бюджетное учреждение здравоохранения г. Москвы «Научно-практический центр специализированной медицинской помощи детям им. В.Ф. Войно-Ясенецкого Департамента здравоохранения г. Москвы»; Федеральное государственное автономное образовательное учреждение высшего образования «Российский национальный исследовательский медицинский университет им. Н.И. Пирогова» Министерства здравоохранения Российской Федерации</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Voyno-Yasenetsky Scientific and Practical Center of Spicialized Medical Care for Children; Pirogov Russian National Research Medical University</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Государственное бюджетное учреждение здравоохранения г. Москвы «Научно-практический центр специализированной медицинской помощи детям им. В.Ф. Войно-Ясенецкого Департамента здравоохранения г. Москвы»</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Voyno-Yasenetsky Scientific and Practical Center of Spicialized Medical Care for Children</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-3"><aff xml:lang="ru"><institution>Общество с ограниченной ответственностью «Геноаналитика»</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Genoanalytica LLC</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-4"><aff xml:lang="ru"><institution>Федеральное государственное автономное образовательное учреждение высшего образования «Российский национальный исследовательский медицинский университет им. Н.И. Пирогова» Министерства здравоохранения Российской Федерации</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Pirogov Russian National Research Medical University</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2024</year></pub-date><pub-date pub-type="epub"><day>16</day><month>04</month><year>2024</year></pub-date><volume>16</volume><issue>1</issue><fpage>45</fpage><lpage>53</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Kozhanova T.V., Zhilina S.S., Meshcheryakova T.I., Sushko L.M., Osipova K.V., Mazur A.M., Fomenko S.S., Krapivkin A.I., Zavadenko N.N., 2024</copyright-statement><copyright-year>2024</copyright-year><copyright-holder xml:lang="ru">Кожанова Т.В., Жилина С.С., Мещерякова Т.И., Сушко Л.М., Осипова К.В., Мазур А.М., Фоменко С.С., Крапивкин А.И., Заваденко Н.Н.</copyright-holder><copyright-holder xml:lang="en">Kozhanova T.V., Zhilina S.S., Meshcheryakova T.I., Sushko L.M., Osipova K.V., Mazur A.M., Fomenko S.S., Krapivkin A.I., Zavadenko N.N.</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/996">https://www.epilepsia.su/jour/article/view/996</self-uri><abstract><p>In most cases, variants of nucleotide sequence in the SEMA6B gene account for developing the phenotype of progressive myoclonus epilepsy and, to a lesser extent, developmental encephalopathy with or without epilepsy. Loss-of-function variants in nucleotide sequence localized mainly in exon 17 of the SEMA6B gene contribute to production of aberrant proteins with “toxic” functions. A clinical case of status epilepsy in a patient with a variant in the SEMA6B gene (c.2506delС; p.His836ThrfsTer136; NM_032108.4) is described in the article that expands our knowledge regarding the SEMA6B gene variants resulting in progressive myoclonus epilepsy.</p></abstract><trans-abstract xml:lang="ru"><p>Варианты нуклеотидной последовательности в гене SEMA6B в большинстве случаев обусловливают развитие фенотипа прогрессирующей миоклонус-эпилепсии и, в меньшей степени, энцефалопатии развития с эпилепсией или без нее. Повреждающие (англ. loss-of-function) варианты нуклеотидной последовательности, локализованные в основном в 17-м экзоне гена, способствуют синтезу аберрантных белков с «токсическими» функциями. В статье описан клинический случай статусного течения эпилепсии у пациента с вариантом в гене SEMA6B (c.2506delС; p.His836ThrfsTer136; NM_032108.4). Представленное наблюдение расширяет наши знания о вариантах в гене SEMA6B, вызывающих прогрессирующую миоклонус-эпилепсию.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>Эпилепсия</kwd><kwd>ген SEMA6B</kwd><kwd>синдром Клайнфельтера</kwd><kwd>полноэкзомное секвенирование</kwd></kwd-group><kwd-group xml:lang="en"><kwd>Epilepsy</kwd><kwd>SEMA6B gene</kwd><kwd>Klinefelter syndrome</kwd><kwd>whole exome sequencing</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">Castellotti B., Canafoglia L., Freri E., et al. Progressive myoclonus epilepsies due to SEMA6B mutations. New variants and appraisal of published phenotypes. Epilepsia Open. 2023; 8 (2): 645–50. https://doi.org/10.1002/epi4.12697.</mixed-citation><mixed-citation xml:lang="en">Castellotti B., Canafoglia L., Freri E., et al. Progressive myoclonus epilepsies due to SEMA6B mutations. New variants and appraisal of published phenotypes. Epilepsia Open. 2023; 8 (2): 645–50. https://doi.org/10.1002/epi4.12697.</mixed-citation></citation-alternatives></ref><ref id="cit2"><label>2</label><citation-alternatives><mixed-citation xml:lang="ru">Franceschetti S., Michelucci R., Canafoglia L., et al. Progressive myoclonic epilepsies: definitive and still undetermined causes. Neurology. 2014; 82 (5): 405–11. https://doi.org/10.1212/WNL.0000000000000077.</mixed-citation><mixed-citation xml:lang="en">Franceschetti S., Michelucci R., Canafoglia L., et al. Progressive myoclonic epilepsies: definitive and still undetermined causes. Neurology. 2014; 82 (5): 405–11. https://doi.org/10.1212/WNL.0000000000000077.</mixed-citation></citation-alternatives></ref><ref id="cit3"><label>3</label><citation-alternatives><mixed-citation xml:lang="ru">Hamanaka K., Imagawa E., Koshimizu E., et al. De novo truncating variants in the last exon of SEMA6B cause progressive myoclonic epilepsy. Am J Hum Genet. 2020; 106 (4): 549–58. https://doi.org/10.1016/j.ajhg.2020.02.011.</mixed-citation><mixed-citation xml:lang="en">Hamanaka K., Imagawa E., Koshimizu E., et al. De novo truncating variants in the last exon of SEMA6B cause progressive myoclonic epilepsy. Am J Hum Genet. 2020; 106 (4): 549–58. https://doi.org/10.1016/j.ajhg.2020.02.011.</mixed-citation></citation-alternatives></ref><ref id="cit4"><label>4</label><citation-alternatives><mixed-citation xml:lang="ru">Yazdani U., Terman J.R. The semaphorins. Genome Biol. 2006; 7: 211. https://doi.org/10.1186/gb-2006-7-3-211.</mixed-citation><mixed-citation xml:lang="en">Yazdani U., Terman J.R. The semaphorins. Genome Biol. 2006; 7: 211. https://doi.org/10.1186/gb-2006-7-3-211.</mixed-citation></citation-alternatives></ref><ref id="cit5"><label>5</label><citation-alternatives><mixed-citation xml:lang="ru">Shu L., Xu Y., Tian Q., et al. A frameshift variant in the SEMA6B gene causes global developmental delay and febrile seizures. Neurosci Bull. 2021; 37 (9): 1357–60. https://doi.org/10.1007/s12264-021-00717-5.</mixed-citation><mixed-citation xml:lang="en">Shu L., Xu Y., Tian Q., et al. A frameshift variant in the SEMA6B gene causes global developmental delay and febrile seizures. Neurosci Bull. 2021; 37 (9): 1357–60. https://doi.org/10.1007/s12264-021-00717-5.</mixed-citation></citation-alternatives></ref><ref id="cit6"><label>6</label><citation-alternatives><mixed-citation xml:lang="ru">Xiaozhen S., Fan Y., Fang Y., et al. Novel truncating and missense variants in SEMA6B in patients with early-onset epilepsy. Front Cell Dev Biol. 2021; 9: 633819. https://doi.org/10.3389/fcell.2021.633819.</mixed-citation><mixed-citation xml:lang="en">Xiaozhen S., Fan Y., Fang Y., et al. Novel truncating and missense variants in SEMA6B in patients with early-onset epilepsy. Front Cell Dev Biol. 2021; 9: 633819. https://doi.org/10.3389/fcell.2021.633819.</mixed-citation></citation-alternatives></ref><ref id="cit7"><label>7</label><citation-alternatives><mixed-citation xml:lang="ru">Duan J., Chen Y., Hu Z., et al. Non-convulsive status epilepticus in SEMA6B-related progressive myoclonic epilepsy: a case report with literature review. Front Pediatr. 2022; 10: 859183. https://doi.org/10.3389/fped.2022.859183.</mixed-citation><mixed-citation xml:lang="en">Duan J., Chen Y., Hu Z., et al. Non-convulsive status epilepticus in SEMA6B-related progressive myoclonic epilepsy: a case report with literature review. Front Pediatr. 2022; 10: 859183. https://doi.org/10.3389/fped.2022.859183.</mixed-citation></citation-alternatives></ref><ref id="cit8"><label>8</label><citation-alternatives><mixed-citation xml:lang="ru">Cordovado A., Schaettin M., Jeanne M., et al. SEMA6B variants cause intellectual disability and alter dendritic spine density and axon guidance. Hum Mol Genet. 2022; 31 (19): 3325–40. https://doi.org/10.1093/hmg/ddac114.</mixed-citation><mixed-citation xml:lang="en">Cordovado A., Schaettin M., Jeanne M., et al. SEMA6B variants cause intellectual disability and alter dendritic spine density and axon guidance. Hum Mol Genet. 2022; 31 (19): 3325–40. https://doi.org/10.1093/hmg/ddac114.</mixed-citation></citation-alternatives></ref><ref id="cit9"><label>9</label><citation-alternatives><mixed-citation xml:lang="ru">Correa R.G., Sasahara R.M., Bengtson M.H., et al. Human semaphoring 6B [(HSA)SEMA6B], a novel human class 6 semaphorin gene: alternative splicing and all-trans-retinoic aciddependent downregulation in glioblastoma cell lines. Genomics. 2001; 73 (3): 343–8. https://doi.org/10.1006/geno.2001.6525.</mixed-citation><mixed-citation xml:lang="en">Correa R.G., Sasahara R.M., Bengtson M.H., et al. Human semaphoring 6B [(HSA)SEMA6B], a novel human class 6 semaphorin gene: alternative splicing and all-trans-retinoic aciddependent downregulation in glioblastoma cell lines. Genomics. 2001; 73 (3): 343–8. https://doi.org/10.1006/geno.2001.6525.</mixed-citation></citation-alternatives></ref><ref id="cit10"><label>10</label><citation-alternatives><mixed-citation xml:lang="ru">Classification of progressive myoclonus epilepsies and related disorders. Marseille Consensus Group. Ann Neurol. 1990; 28 (1): 113–6. https://doi.org/10.1002/ana.410280129.</mixed-citation><mixed-citation xml:lang="en">Classification of progressive myoclonus epilepsies and related disorders. Marseille Consensus Group. Ann Neurol. 1990; 28 (1): 113–6. https://doi.org/10.1002/ana.410280129.</mixed-citation></citation-alternatives></ref></ref-list><fn-group><fn fn-type="conflict"><p>The authors declare that there are no conflicts of interest present.</p></fn></fn-group></back></article>
