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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="research-article" dtd-version="1.2" xml:lang="en"><front><journal-meta><journal-id journal-id-type="publisher-id">Acta Naturae</journal-id><journal-title-group><journal-title xml:lang="en">Acta Naturae</journal-title><trans-title-group xml:lang="ru"><trans-title>Acta Naturae</trans-title></trans-title-group></journal-title-group><issn publication-format="print">2075-8251</issn><publisher><publisher-name xml:lang="en">Acta Naturae Ltd</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">10426</article-id><article-id pub-id-type="doi">10.32607/20758251-2016-8-3-103-110</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>Research Articles</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>Экспериментальные статьи</subject></subj-group><subj-group subj-group-type="article-type"><subject>Research Article</subject></subj-group></article-categories><title-group><article-title xml:lang="en">Whole-Genome DNA Methylation Analysis of Peripheral Blood Mononuclear Cells in Multiple Sclerosis Patients with Different Disease Courses</article-title><trans-title-group xml:lang="ru"><trans-title>Полногеномный анализ метилирования ДНК мононуклеарных клеток крови больных различными формами рассеянного склероза</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Kulakova</surname><given-names>O. G.</given-names></name><name xml:lang="ru"><surname>Кулакова</surname><given-names>O. Г.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>olga.koulakova@gmail.com</email><xref ref-type="aff" rid="aff1"/><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Kabilov</surname><given-names>M. R.</given-names></name><name xml:lang="ru"><surname>Кабилов</surname><given-names>M. Р.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>olga.koulakova@gmail.com</email><xref ref-type="aff" rid="aff3"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Danilova</surname><given-names>L. V.</given-names></name><name xml:lang="ru"><surname>Данилова</surname><given-names>Л. В.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>olga.koulakova@gmail.com</email><xref ref-type="aff" rid="aff4"/><xref ref-type="aff" rid="aff5"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Popova</surname><given-names>E. V.</given-names></name><name xml:lang="ru"><surname>Попова</surname><given-names>E. В.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>olga.koulakova@gmail.com</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Baturina</surname><given-names>O. A.</given-names></name><name xml:lang="ru"><surname>Батурина</surname><given-names>O. A.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>olga.koulakova@gmail.com</email><xref ref-type="aff" rid="aff3"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Tsareva</surname><given-names>E. Yu.</given-names></name><name xml:lang="ru"><surname>Царева</surname><given-names>E. Ю.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>olga.koulakova@gmail.com</email><xref ref-type="aff" rid="aff1"/><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Baulina</surname><given-names>N. M.</given-names></name><name xml:lang="ru"><surname>Баулина</surname><given-names>Н. М.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>olga.koulakova@gmail.com</email><xref ref-type="aff" rid="aff1"/><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Kiselev</surname><given-names>I. S.</given-names></name><name xml:lang="ru"><surname>Киселев</surname><given-names>И. С.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>olga.koulakova@gmail.com</email><xref ref-type="aff" rid="aff1"/><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Boyko</surname><given-names>A. N.</given-names></name><name xml:lang="ru"><surname>Бойко</surname><given-names>A. Н.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>olga.koulakova@gmail.com</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Favorov</surname><given-names>A. V.</given-names></name><name xml:lang="ru"><surname>Фаворов</surname><given-names>A. В.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>olga.koulakova@gmail.com</email><xref ref-type="aff" rid="aff4"/><xref ref-type="aff" rid="aff5"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Favorova</surname><given-names>O. O.</given-names></name><name xml:lang="ru"><surname>Фаворова</surname><given-names>O. O.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>olga.koulakova@gmail.com</email><xref ref-type="aff" rid="aff1"/><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Vlassov</surname><given-names>V. V.</given-names></name><name xml:lang="ru"><surname>Власов</surname><given-names>В. В.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>olga.koulakova@gmail.com</email><xref ref-type="aff" rid="aff3"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Pirogov Russian National Research Medical University</institution></aff><aff><institution xml:lang="ru">Российский национальный исследовательский медицинский университет им. Н.И. Пирогова Минздрава России</institution></aff></aff-alternatives><aff-alternatives id="aff2"><aff><institution xml:lang="en">Russian Cardiology Scientific and Production Center</institution></aff><aff><institution xml:lang="ru">Российский кардиологический научно-производственный комплекс Минздрава России</institution></aff></aff-alternatives><aff-alternatives id="aff3"><aff><institution xml:lang="en">Siberian Branch of the Russian Academy of Sciences</institution></aff><aff><institution xml:lang="ru">Институт химической биологии и фундаментальной медицины СО РАН</institution></aff></aff-alternatives><aff-alternatives id="aff4"><aff><institution xml:lang="en">Vavilov Institute of General Genetics, Russian Academy of Sciences</institution></aff><aff><institution xml:lang="ru">Институт общей генетики им. Н.И. Вавилова РАН</institution></aff></aff-alternatives><aff id="aff5"><institution>Johns Hopkins School of Medicine</institution></aff><pub-date date-type="pub" iso-8601-date="2016-09-15" publication-format="electronic"><day>15</day><month>09</month><year>2016</year></pub-date><volume>8</volume><issue>3</issue><issue-title xml:lang="en">VOL 8, NO3 (2016)</issue-title><issue-title xml:lang="ru">ТОМ 8, №3 (2016)</issue-title><fpage>103</fpage><lpage>110</lpage><history><date date-type="received" iso-8601-date="2020-01-17"><day>17</day><month>01</month><year>2020</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2016, Kulakova O.G., Kabilov M.R., Danilova L.V., Popova E.V., Baturina O.A., Tsareva E.Y., Baulina N.M., Kiselev I.S., Boyko A.N., Favorov A.V., Favorova O.O., Vlassov V.V.</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2016, Кулакова O.Г., Кабилов M.Р., Данилова Л.В., Попова E.В., Батурина O.A., Царева E.Ю., Баулина Н.М., Киселев И.С., Бойко A.Н., Фаворов A.В., Фаворова O.O., Власов В.В.</copyright-statement><copyright-year>2016</copyright-year><copyright-holder xml:lang="en">Kulakova O.G., Kabilov M.R., Danilova L.V., Popova E.V., Baturina O.A., Tsareva E.Y., Baulina N.M., Kiselev I.S., Boyko A.N., Favorov A.V., Favorova O.O., Vlassov V.V.</copyright-holder><copyright-holder xml:lang="ru">Кулакова O.Г., Кабилов M.Р., Данилова Л.В., Попова E.В., Батурина O.A., Царева E.Ю., Баулина Н.М., Киселев И.С., Бойко A.Н., Фаворов A.В., Фаворова O.O., Власов В.В.</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://creativecommons.org/licenses/by/4.0</ali:license_ref></license></permissions><self-uri xlink:href="https://actanaturae.ru/2075-8251/article/view/10426">https://actanaturae.ru/2075-8251/article/view/10426</self-uri><abstract xml:lang="en"><p>Multiple sclerosis (MS) is a severe neurodegenerative disease of polygenic etiology affecting the central nervous system. In addition to genetic factors, epigenetic mechanisms, primarily DNA methylation, which regulate gene expression, play an important role in MS development and progression. In this study, we have performed the first whole-genome DNA methylation profiling of peripheral blood mononuclear cells in relapsing-remitting MS (RRMS) and primary-progressive MS (PPMS) patients and compared them to those of healthy individuals in order to identify the differentially methylated CpG-sites (DMSs) associated with these common clinical disease courses. In addition, we have performed a pairwise comparison of DNA methylation profiles in RRMS and PPMS patients. All three pairwise comparisons showed significant differences in methylation profiles. Hierarchical clustering of the identified DMS methylation levels and principal component analysis for data visualization demonstrated a clearly defined aggregation of DNA samples of the compared groups into separate clusters. Compared with the control, more DMSs were identified in PPMS patients than in RRMS patients (67 and 30, respectively). More than half of DMSs are located in genes, exceeding the expected number for random distribution of DMSs between probes. RRMS patients mostly have hypomethylated DMSs, while in PPMS patients DMSs are mostly hypermethylated. CpG-islands and CpG-shores contain 60% of DMSs, identified by pairwise comparison of RRMS and control groups, and 79% of those identified by pairwise comparison of PPMS and control groups. Pairwise comparison of patients with two clinical MS courses revealed 51 DMSs, 82% of which are hypermethylated in PPMS. Overall, it was demonstrated that there are more changes in the DNA methylation profiles in PPMS than in RRMS. The data confirm the role of DNA methylation in MS development. We have shown, for the first time, that DNA methylation as an epigenetic mechanism is involved in the formation of two distinct clinical courses of MS: namely, RRMS and PPMS.</p></abstract><trans-abstract xml:lang="ru"><p>Рассеянный склероз (РС) - это тяжелое нейродегенеративное заболевание центральной нервной системы с полигенным типом наследования. Помимо генетических факторов, важную роль в развитии и течении РС могут играть эпигенетические механизмы, в первую очередь метилирование ДНК, влияющее на экспрессию генов. В настоящей работе для поиска дифференциально метилированных CpG-сайтов, ассоциированных с развитием двух основных клинических форм заболевания - ремиттирующего РС (РРС) и первично-прогрессирующего РС (ППРС), впервые проведен полногеномный анализ профиля метилирования ДНК в мононуклеарных клетках периферической крови больных РРС и ППРС в сравнении со здоровыми индивидами контрольной группы. Проведено также прямое сравнение профилей метилирования ДНК у пациентов с РРС и ППРС. При всех попарных сравнениях выявлены существенные различия в профилях метилирования. При иерархической кластеризации по уровню метилирования обнаруженных дифференциально метилированных сайтов (ДМС) и при визуализации данных с помощью метода главных компонент наблюдается четкое объединение образцов ДНК каждой из сравниваемых групп в отдельный кластер. У больных ППРС в сравнении со здоровыми индивидами выявлено бóльшее число ДМС, чем у больных РРС в сравнении со здоровыми индивидами (67 против 30). Более половины всех ДМС расположены в генах, что превышает число, ожидаемое при случайном распределении ДМС среди проб. В случае РРС бóльшая часть ДМС гипометилирована, при ППРС - гиперметилирована. В CpG-островках и соседних областях расположено 60% ДМС, выявляемых при сравнении РРС с контролем, и 79% - при сравнении ППРС с контролем. Прямое сравнение двух форм РС выявило 51 ДМС, из которых бóльшая часть (82%) гиперметилирована при ППРС. В целом, показано, что ППРС отличается от РРС бóльшими изменениями в паттерне метилирования ДНК. Полученные результаты свидетельствуют об участии метилирования ДНК в развитии РС. Впервые показано, что эпигенетический механизм метилирования ДНК вовлечен в формирование клинически различных форм РС - РРС и ППРС.</p></trans-abstract><kwd-group xml:lang="en"><kwd>epigenetics</kwd><kwd>DNA methylation</kwd><kwd>multiple sclerosis</kwd><kwd>peripheral blood mononuclear cells</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>метилирование ДНК</kwd><kwd>мононуклеарные клетки крови</kwd><kwd>рассеянный склероз</kwd><kwd>эпигенетика</kwd></kwd-group><funding-group><funding-statement xml:lang="en">This work was supported by grants from Russian Foundation for Basic Research No. 13-04-40279-H (LD, AF), 13-04-40280-H (MK, OB, VV) and 13-04-40281-H (EP, NB, AB) within the framework of an integrated project 13-00-40277-K and by Russian Scientific Foundation grant № 14-14-00605 (OK, ET, IK).</funding-statement><funding-statement xml:lang="ru">Работа поддержана грантами РФФИ № 13-04-40279-Н (ЛД, АФ), 13-04-40280-Н (МК, ОБ, ВВ) и 13-04-40281-Н (ЕП, НБ, АБ) в рамках комплексного проекта 13-00-40277-К и грантом РНФ № 14-14-00605 (ОК, ЕЦ, ИК).</funding-statement></funding-group></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>[1] Gourraud P.A., Harbo H.F., Hauser S.L., Baranzini S.E. // Immunol. 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