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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="ru"><front><journal-meta><journal-id journal-id-type="publisher-id">nodgo</journal-id><journal-title-group><journal-title xml:lang="ru">Российский журнал детской гематологии и онкологии (РЖДГиО)</journal-title><trans-title-group xml:lang="en"><trans-title>Russian Journal of Pediatric Hematology and Oncology</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2311-1267</issn><issn pub-type="epub">2413-5496</issn><publisher><publisher-name>LTD “Graphica”</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.21682/2311-1267-2023-10-3-15-21</article-id><article-id custom-type="elpub" pub-id-type="custom">nodgo-959</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="ru"><subject>ОРИГИНАЛЬНЫЕ ИССЛЕДОВАНИЯ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>ORIGINAL STUDIES</subject></subj-group></article-categories><title-group><article-title>Анализ профиля метилирования ДНК подтверждает содержание высокого процента иммунных клеток в образцах глиобластом</article-title><trans-title-group xml:lang="en"><trans-title>Analysis of DNA methylation profiles confirms a high proportion of immune cells in glioblastoma samples</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-2498-4713</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Петрова</surname><given-names>Е. И.</given-names></name><name name-style="western" xml:lang="en"><surname>Petrova</surname><given-names>E. I.</given-names></name></name-alternatives><bio xml:lang="ru"><p>младший научный сотрудник патологоанатомического отделения</p><p>125047, Москва, ул. 4-я Тверская-Ямская, 16</p></bio><bio xml:lang="en"><p>Research Assistant Pathology Department</p><p>16 4th Tverskaya-Yamskaya St., Moscow, 125047</p></bio><email xlink:type="simple">petrova.katr@gmail.com</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-7531-6443</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Ольхова</surname><given-names>Л. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Olkhova</surname><given-names>L. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>к.м.н., врач-детский онколог отделения трансплантации костного мозга</p><p>119571, Москва, Ленинский просп., 117</p></bio><bio xml:lang="en"><p>Cand. of Sci. (Med.), Pediatric Oncologist, Department of Bone Marrow Transplantation</p><p>117 Leninskiy Prosp., Moscow, 117997</p></bio><email xlink:type="simple">rylkova87@mail.ru</email><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-9953-6654</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Галстян</surname><given-names>С. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Galstyan</surname><given-names>S. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>врач-патологоанатом патологоанатомического отделения</p><p> 125047, Москва, ул. 4-я Тверская-Ямская, 16</p></bio><bio xml:lang="en"><p>Pathologist Pathology Department</p><p>16 4th Tverskaya-Yamskaya St., Moscow, 125047</p><p> </p></bio><email xlink:type="simple">sgalstyan@nsi.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/0000-0002-0370-8667</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Телышева</surname><given-names>Е. Н.</given-names></name><name name-style="western" xml:lang="en"><surname>Telysheva</surname><given-names>E. N.</given-names></name></name-alternatives><bio xml:lang="ru"><p> к.б.н., биолог патологоанатомического отделения</p><p>125047, Москва, ул. 4-я Тверская-Ямская, 16</p></bio><bio xml:lang="en"><p>Cand. of Sci. (Biol.), Biologist Pathology Department</p><p>16 4th Tverskaya-Yamskaya St., Moscow, 125047</p></bio><email xlink:type="simple">telisheva_k@mail.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/0000-0002-8607-3635</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Желудкова</surname><given-names>О. Г.</given-names></name><name name-style="western" xml:lang="en"><surname>Zheludkova</surname><given-names>O. G.</given-names></name></name-alternatives><bio xml:lang="ru"><p>д.м.н., профессор, эксперт ВАК по детской нейроонкологии, главный научный сотрудник; врач-детский онколог</p><p>119620, Москва, ул. Авиаторов, 38</p><p>194354, Санкт-Петербург, ул. Есенина, 2, корп. 3</p></bio><bio xml:lang="en"><p>Dr. of Sci. (Med.), Professor, Expert of the Higher Attestation Commission on Pediatric Neuro-Oncology, Chief Researcher of Practical Center for Specialized Medical Care for Children named after V.F. Voyno-Yasenetsky Moscow Healthcare Department, Pediatric Oncologist DTC IIBS named after S. Berezin</p><p>38 Aviatorov St., Moscow, 119620</p><p>Bldg. 3, 2 Yesenin St., S.-Petersburg, 194354</p></bio><email xlink:type="simple">clelud@mail.ru</email><xref ref-type="aff" rid="aff-3"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-7206-6365</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Рыжова</surname><given-names>М. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Ryzhova</surname><given-names>M. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Марина Владимировна Рыжова -  д.м.н., заведующая патологоанатомическим отделением</p><p>125047, Москва, ул. 4-я Тверская-Ямская, 16</p></bio><bio xml:lang="en"><p>Dr. of Sci. (Med.), Head of the Pathology Department</p><p>16 4th Tverskaya-Yamskaya St., Moscow, 125047</p></bio><email xlink:type="simple">mrizhova@nsi.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>ФГАУ «Национальный медицинский исследовательский центр нейрохирургии имени академика Н.Н. Бурденко» Минздрава России</institution><country>Россия</country></aff><aff xml:lang="en"><institution>N.N. Burdenko National Medical Research Center of Neurosurgery, Ministry of Health of Russia</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Российская детская клиническая больница – филиал ФГАОУ ВО «Российский национальный исследовательский медицинский университет имени Н.И. Пирогова» Минздрава России</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Russian Children’s Clinical Hospital – Branch of the N.I. Pirogov Russian National Research Medical University, Ministry of Health of Russia</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-3"><aff xml:lang="ru"><institution>ГБУЗ «Научно-практический центр специализированной медицинской помощи детям имени В.Ф. Войно-Ясенецкого Департамента здравоохранения города Москвы»; ООО «Лечебно-диагностический центр Международного института биологических систем имени Сергея Березина»</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Scientific and Practical Center for Specialized Medical Care for Children named after V.F. Voyno-Yasenetsky Moscow Healthcare Department; Diagnostic and Treatment Center of International Institution for Biological Systems named after Sergey Berezin</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2023</year></pub-date><pub-date pub-type="epub"><day>29</day><month>11</month><year>2023</year></pub-date><volume>10</volume><issue>3</issue><fpage>15</fpage><lpage>21</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Петрова Е.И., Ольхова Л.В., Галстян С.А., Телышева Е.Н., Желудкова О.Г., Рыжова М.В., 2023</copyright-statement><copyright-year>2023</copyright-year><copyright-holder xml:lang="ru">Петрова Е.И., Ольхова Л.В., Галстян С.А., Телышева Е.Н., Желудкова О.Г., Рыжова М.В.</copyright-holder><copyright-holder xml:lang="en">Petrova E.I., Olkhova L.V., Galstyan S.A., Telysheva E.N., Zheludkova O.G., Ryzhova M.V.</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://journal.nodgo.org/jour/article/view/959">https://journal.nodgo.org/jour/article/view/959</self-uri><abstract><p>Глиобластомы – класс злокачественных новообразований центральной нервной системы, представляющий особую сложность для молекулярной диагностики и подтверждения диагноза ввиду значительной внутриопухолевой гетерогенности. Помимо поиска характерных генетических мутаций, например IDH, H3F3A, в «горячих точках» G34 и К27, согласно рекомендациям Всемирной организации здравоохранения, важную роль играет анализ эпигенома опухоли – определение ее класса по структуре метилирования ДНК и статуса метилирования конкретных участков генома, в частности области промотора гена MGMT. Исходя из практического опыта, результаты молекулярно-генетических исследований нередко оказываются противоречивыми из-за неоднородного клеточного состава глиобластом. В данной работе мы приводим серию наблюдений из 35 образцов глиобластом, где сопоставляем морфологические особенности и результаты анализа клеточных типов методом деконволюции на основе общих профилей метилирования ДНК. Согласно нашим результатам, образцы глиобластом мезенхимального класса могут содержать более 50 % неопухолевых иммунных клеток, что следует учитывать при генетических исследованиях данных опухолей.</p></abstract><trans-abstract xml:lang="en"><p>Glioblastomas are malignant tumors that belong to the central nervous system and are challenging to diagnose due to their significant intratumoral heterogeneity, which makes molecular testing and diagnosis confirmation particularly difficult. In addition to identifying typical genetic mutations such as IDH, H3F3A G34 and K27, WHO recommendations emphasize the importance of analyzing the tumor epigenome to define its class based on DNA methylation patterns and methylation status of specific genomic regions, particularly the MGMT promoter region. Based on our clinical experience, molecular genetic studies sometimes yield contradictory results due to the heterogeneous cellular composition of glioblastomas. In this study, we present a series of observations made on 35 glioblastoma samples in which we compare the morphological features and the results of cell type detection by deconvolution method based on total DNA methylation profiles. Our results suggest that samples of mesenchymal class glioblastomas may contain over 50 % non-tumor immune cells, which should be considered in genetic testing of these tumors.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>глиобластома</kwd><kwd>эпигенетика опухолей центральной нервной системы</kwd><kwd>молекулярная диагностика</kwd><kwd>метилирование ДНК</kwd><kwd>деконволюция клеточных типов</kwd><kwd>Illumina EPIC Methylation microarray</kwd></kwd-group><kwd-group xml:lang="en"><kwd>glioblastoma</kwd><kwd>epigenetics of CNS tumors</kwd><kwd>molecular diagnostics</kwd><kwd>DNA methylation</kwd><kwd>cell type deconvolution</kwd><kwd>Illumina EPIC Methylation microarray</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Работа выполнена при поддержке гранта Министерства образования и науки № 075-15-2021-1343 «Развитие биоресурсной коллекции опухолей нервной системы человека с молекулярно-генетической паспортизацией для персонифицированного лечения пациентов с нейроонкологическими заболеваниями».</funding-statement><funding-statement xml:lang="en">The study was financially supported by the Ministry of Science and Higher Education of the Russian Federation (Agreement No. 075 15 2021 1343) “Development of a bioresource collection of tumors of the human nervous system with molecular genetic certification for personalized treatment of patients with neuro-oncological diseases”.</funding-statement></funding-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Ostrom Q.T., Price M., Neff C., Cioffi G., Waite K.A., Kruchko C., Barnholtz-Sloan J.S. 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