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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">Advances in Molecular Oncology</journal-id><journal-title-group><journal-title xml:lang="en">Advances in Molecular Oncology</journal-title><trans-title-group xml:lang="ru"><trans-title>Успехи молекулярной онкологии</trans-title></trans-title-group></journal-title-group><issn publication-format="print">2313-805X</issn><issn publication-format="electronic">2413-3787</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">841</article-id><article-id pub-id-type="doi">10.17650/2313-805X-2025-12-4-81-90</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">Epithelial-mesenchymal transition in high grade serous ovarian cancer cells</article-title><trans-title-group xml:lang="ru"><trans-title>Особенности эпителиально-мезенхимального перехода клеток серозного рака яичников высокой степени злокачественности</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0009-0001-7806-6734</contrib-id><name-alternatives><name xml:lang="en"><surname>Voronova</surname><given-names>M. M.</given-names></name><name xml:lang="ru"><surname>Воронова</surname><given-names>М. М.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>n.gloushankova@ronc.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-8925-440X</contrib-id><name-alternatives><name xml:lang="en"><surname>Ilnitskaya</surname><given-names>A. S.</given-names></name><name xml:lang="ru"><surname>Ильницкая</surname><given-names>А. С.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>n.gloushankova@ronc.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-9659-770X</contrib-id><name-alternatives><name xml:lang="en"><surname>Zholudeva</surname><given-names>A. O.</given-names></name><name xml:lang="ru"><surname>Жолудева</surname><given-names>А. О.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>n.gloushankova@ronc.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-4620-7851</contrib-id><name-alternatives><name xml:lang="en"><surname>Rubtsova</surname><given-names>S. N.</given-names></name><name xml:lang="ru"><surname>Рубцова</surname><given-names>С. Н.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>n.gloushankova@ronc.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-1380-3710</contrib-id><name-alternatives><name xml:lang="en"><surname>Zhordania</surname><given-names>K. I.</given-names></name><name xml:lang="ru"><surname>Жорданиа</surname><given-names>К. И.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>n.gloushankova@ronc.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-5071-2290</contrib-id><name-alternatives><name xml:lang="en"><surname>Alexandrova</surname><given-names>A. Yu.</given-names></name><name xml:lang="ru"><surname>Александрова</surname><given-names>А. Ю.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>n.gloushankova@ronc.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-2044-2063</contrib-id><name-alternatives><name xml:lang="en"><surname>Gloushankova</surname><given-names>N. A.</given-names></name><name xml:lang="ru"><surname>Глушанкова</surname><given-names>Н. А.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>n.gloushankova@ronc.ru</email><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">N.N. Blokhin National Medical Research Center of Oncology, Ministry of Health of Russia</institution></aff><aff><institution xml:lang="ru">ФГБУ «Национальный медицинский исследовательский центр онкологии им. Н.Н. Блохина» Минздрава России</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2025-12-14" publication-format="electronic"><day>14</day><month>12</month><year>2025</year></pub-date><volume>12</volume><issue>4</issue><issue-title xml:lang="en"/><issue-title xml:lang="ru"/><fpage>81</fpage><lpage>90</lpage><history><date date-type="received" iso-8601-date="2025-12-13"><day>13</day><month>12</month><year>2025</year></date><date date-type="accepted" iso-8601-date="2025-12-13"><day>13</day><month>12</month><year>2025</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2025, Voronova M.M., Ilnitskaya A.S., Zholudeva A.O., Rubtsova S.N., Zhordania K.I., Alexandova A.Y., Gloushankova N.A.</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2025, Воронова М.М., Ильницкая А.С., Жолудева А.О., Рубцова С.Н., Жорданиа К.И., Александрова А.Ю., Глушанкова Н.А.</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="en">Voronova M.M., Ilnitskaya A.S., Zholudeva A.O., Rubtsova S.N., Zhordania K.I., Alexandova A.Y., Gloushankova N.A.</copyright-holder><copyright-holder xml:lang="ru">Воронова М.М., Ильницкая А.С., Жолудева А.О., Рубцова С.Н., Жорданиа К.И., Александрова А.Ю., Глушанкова Н.А.</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://umo.abvpress.ru/jour/article/view/841">https://umo.abvpress.ru/jour/article/view/841</self-uri><abstract xml:lang="en"><p><bold>Introduction</bold>. Epithelial-mesenchymal transition (EMT) is the major driver of invasion and metastasis of cancer cells. The hallmarks of EMT are disruption of stable cell-cell adhesion and acquisition of a migratory phenotype by epithelial cells.</p> <p><bold>Aim</bold>. To study of migratory activity and intracellular distribution of cell-cell adhesion proteins, actin cytoskeleton and vimentin intermediate filaments in primary cultures of high grade serous ovarian cancer obtained from clinical samples using correlative live cell imaging/immunofluorescence microscopy.</p> <p><bold>Materials and methods</bold>. Using correlative live cell imaging/immunofluorescence microscopy, we studied cell migration and intracellular distribution of cell-cell adhesion proteins, actin cytoskeleton structures and vimentin intermediate filaments.</p> <p><bold>Results</bold>. In primary cultures of high grade serous ovarian cancer many traits of incomplete EMT were observed, namely: dramatic remodeling of the actin cytoskeleton, reorganization of adherens junctions with retention of E-cadherin expression in the majority of samples, expression of mesenchymal markers such as vimentin and N-cadherin, and enhanced migratory activity. Different cell populations exhibited heterogeneous levels of EMT markers, for example, a prominent vimentin intermediate filament network was detected in actively migrating cancer cells.</p> <p><bold>Conclusion</bold>. High grade serous ovarian cancer cells with enhanced migration potential undergo incomplete EMT which is the optimal choice for promoting invasion and metastasis.</p></abstract><trans-abstract xml:lang="ru"><p><bold>Введение</bold>. Эпителиально-мезенхимальный переход (ЭМП) – основной процесс, инициирующий инвазию и метастазирование раковых клеток. Разрушение стабильной межклеточной адгезии и приобретение миграционного фенотипа клетками эпителиального происхождения являются основными этапами ЭМП.</p> <p><bold>Цель исследования</bold> – изучение миграционной активности и систем цитоскелета клеток первичных опухолевых культур серозного рака яичников высокой степени злокачественности, полученных из операционного материала больных.</p> <p><bold>Материалы и методы</bold>. С использованием коррелятивной видеомикроскопии и иммунофлуоресцентной микроскопии исследованы характер миграции и распределение белков межклеточной адгезии, структур актинового цитоскелета и виментиновых промежуточных филаментов.</p> <p><bold>Результаты</bold>. Клетки серозного рака яичников высокой степени злокачественности в первичных культурах продемонстрировали признаки неполного ЭМП: выявлены радикальная перестройка актинового цитоскелета, реорганизация межклеточных адгезионных контактов при сохранении экспрессии Е-кадхерина в большинстве образцов, включение экспрессии мезенхимальных маркеров виментина и N-кадхерина, а также высокая миграционная активность. Гетерогенность выраженности маркеров ЭМП была характерна для различных клеточных популяций. В активно мигрирующих опухолевых клетках сильно выражена сеть виментиновых промежуточных филаментов.</p> <p><bold>Заключение</bold>. Для клеток серозного рака яичников высокой степени злокачественности, демонстрирующих повышенный потенциал к миграции, характерен неполный ЭМП, который может быть оптимальным выбором для клеток рака яичников, способствующим инвазии и метастазированию.</p></trans-abstract><kwd-group xml:lang="en"><kwd>high grade serous ovarian cancer</kwd><kwd>epithelial-mesenchymal transition</kwd><kwd>cell migration</kwd><kwd>cytoskeleton</kwd><kwd>cell adhesion</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>серозный рак яичников высокой степени злокачественности</kwd><kwd>эпителиально-мезенхимальный переход</kwd><kwd>клеточная миграция</kwd><kwd>цитоскелет</kwd><kwd>клеточная адгезия</kwd></kwd-group><funding-group><award-group><funding-source><institution-wrap><institution xml:lang="ru">Российский научный фонд</institution></institution-wrap><institution-wrap><institution xml:lang="en">Russian Science Foundation</institution></institution-wrap></funding-source><award-id>22-15-00347-П</award-id></award-group></funding-group></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Nieto M.A., Huang R.Y.Y.J., Jackson R.A.A. et al. 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