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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">medgen</journal-id><journal-title-group><journal-title xml:lang="ru">Медицинская генетика</journal-title><trans-title-group xml:lang="en"><trans-title>Medical Genetics</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2073-7998</issn><publisher><publisher-name>Publishing House «Genius Media» LLC</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.25557/2073-7998.2025.06.64-65</article-id><article-id custom-type="elpub" pub-id-type="custom">medgen-3024</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>КРАТКОЕ СООБЩЕНИЕ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>BRIEF REPORT</subject></subj-group></article-categories><title-group><article-title>Значение метилирования гена BRCA1 в прогнозе пациентов с серозным раком яичников высокой степени злокачественности</article-title><trans-title-group xml:lang="en"><trans-title>BRCA1 methylation impacts on the prognosis of patients with high-grade serous ovarian cancer</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>Кекеева</surname><given-names>Т. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Kekeeva</surname><given-names>T. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Кекеева Татьяна Владимировна.</p><p>115522, Москва, ул. Москворечье, д. 1</p></bio><bio xml:lang="en"><p>1, Moskvorechie st., Moscow, 115522</p></bio><email xlink:type="simple">kekeeva@mail.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>Танас</surname><given-names>А. С.</given-names></name><name name-style="western" xml:lang="en"><surname>Tanas</surname><given-names>A. S.</given-names></name></name-alternatives><bio xml:lang="ru"><p>115522, Москва, ул. Москворечье, д. 1</p></bio><bio xml:lang="en"><p>1, Moskvorechie st., Moscow, 115522</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Залетаев</surname><given-names>Д. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Zaletaev</surname><given-names>D. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>115522, Москва, ул. Москворечье, д. 1</p></bio><bio xml:lang="en"><p>1, Moskvorechie st., Moscow, 115522</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Стрельников</surname><given-names>В. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Strelnikov</surname><given-names>V. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>115522, Москва, ул. Москворечье, д. 1</p></bio><bio xml:lang="en"><p>1, Moskvorechie st., Moscow, 115522</p></bio><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>ФГБНУ Медико-генетический научный центр имени академика Н.П. Бочкова</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Research Centre for Medical Genetics</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2025</year></pub-date><pub-date pub-type="epub"><day>21</day><month>08</month><year>2025</year></pub-date><volume>24</volume><issue>6</issue><fpage>64</fpage><lpage>65</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Кекеева Т.В., Танас А.С., Залетаев Д.В., Стрельников В.В., 2025</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="ru">Кекеева Т.В., Танас А.С., Залетаев Д.В., Стрельников В.В.</copyright-holder><copyright-holder xml:lang="en">Kekeeva T.V., Tanas A.S., Zaletaev D.V., Strelnikov V.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://www.medgen-journal.ru/jour/article/view/3024">https://www.medgen-journal.ru/jour/article/view/3024</self-uri><abstract><p>Дефицит системы гомологичной рекомбинации ДНК (HRD, homologous recombination deficiency) – частое молекулярное нарушение при серозном раке яичников высокой степени злокачественности (HGSOC), ассоциированным с чувствительностью опухоли к препаратам платины и ингибиторам PARP. Мы определили HRD статус, мутационный статус генов BRCA1/2 и метилирование гена BRCA1 в 352 образцах HGSOC, разделили HRD-положительных пациентов по генетическим и эпигенетическим изменениям и оценили их ответ на химиотерапию (ХТ) первой линии и выживаемость без прогрессирования (ВБП). Группа с мутациями BRCA имела наиболее благоприятный исход с точки зрения ответа на стандартную ХТ (частота объективного ответа, ЧОО, 96%) и ВБП (46 месяцев). В группе с метилированием ЧОО на ХТ и медиана ВБП были статистически значимо ниже, чем в группе с мутациями – 84% против 96% (p = 0,046) и 19 месяцев (p &lt; 0,0001), соответственно. Таким образом, определение метилирования гена BRCA1 важно для выявления группы пациентов с неблагоприятным прогнозом, которым требуется более тщательное наблюдение.</p></abstract><trans-abstract xml:lang="en"><p>Homologous recombination repair deficiency (HRD) is involved in the development of high-grade serous ovarian carcinoma (HGSOC) and its higher sensitivity to platinum-based chemotherapy. We have evaluated the HRD status, including BRCA mutations, genomic scar score, and methylation of BRCA1 in 352 HGSOCs. We then divided the HRD-positive cohort into molecular subgroups, the BRCA mutation cohort and BRCA1 methylation cohort and evaluated their first-line chemotherapy response and progression-free survival (PFS). The BRCA mutation group showed the best outcome in platinum therapy (ORR 96%), and the highest median PFS (46 months). Patients with BRCA1 methylation showed a significantly poorer outcome, with a median PFS of 19 months and a significantly lower ORR to platinum therapy (84%). In conclusion, methylation group had poor outcomes in terms of chemotherapy response, and PFS, requiring a more thorough follow-up.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>дефицит гомологичной рекомбинации</kwd><kwd>серозный рак яичников высокой степени злокачественности</kwd><kwd>BRCA</kwd><kwd>выживаемость без прогрессирования</kwd></kwd-group><kwd-group xml:lang="en"><kwd>homologous recombination deficiency</kwd><kwd>high-grade serous ovarian carcinoma</kwd><kwd>BRCA</kwd><kwd>progression-free survival</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Работа выполнена в рамках государственного задания Минобрнауки России для ФГБНУ МГНЦ.</funding-statement><funding-statement xml:lang="en">The research was carried out within the state assignment by the Ministry of Science and Higher Education of the Russian Federation for Research Centre for Medical Genetics.</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">Kurman R., Carcangiu M., Harrington C., et al. 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