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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">Journal of obstetrics and women's diseases</journal-id><journal-title-group><journal-title xml:lang="en">Journal of obstetrics and women's diseases</journal-title><trans-title-group xml:lang="ru"><trans-title>Журнал акушерства и женских болезней</trans-title></trans-title-group></journal-title-group><issn publication-format="print">1684-0461</issn><issn publication-format="electronic">1683-9366</issn><publisher><publisher-name xml:lang="en">Eco-Vector</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">630372</article-id><article-id pub-id-type="doi">10.17816/JOWD630372</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>Original study articles</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>Оригинальные исследования</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">Role of vimentin in the morphogenesis of endometrial decidualization during pregnancy with IVF methods</article-title><trans-title-group xml:lang="ru"><trans-title>Роль виментина в морфогенезе децидуализации эндометрия при беременности, наступившей методами ЭКО</trans-title></trans-title-group><trans-title-group xml:lang="zh"><trans-title/></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-8948-4811</contrib-id><contrib-id contrib-id-type="spin">1244-9631</contrib-id><name-alternatives><name xml:lang="en"><surname>Tral</surname><given-names>Tatiana G.</given-names></name><name xml:lang="ru"><surname>Траль</surname><given-names>Татьяна Георгиевна</given-names></name><name xml:lang="zh"><surname></surname><given-names></given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>MD, Cand. Sci. (Med.)</p></bio><bio xml:lang="ru"><p>канд. мед. наук</p></bio><email>ttg.tral@yandex.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-6216-6220</contrib-id><contrib-id contrib-id-type="spin">7544-4825</contrib-id><name-alternatives><name xml:lang="en"><surname>Tolibova</surname><given-names>Gulrukhsor Kh.</given-names></name><name xml:lang="ru"><surname>Толибова</surname><given-names>Гулрухсор Хайбуллоевна</given-names></name><name xml:lang="zh"><surname></surname><given-names></given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>MD, Dr. Sci. (Med.)</p></bio><bio xml:lang="ru"><p>д-р мед. наук</p></bio><email>gulyatolibova@yandex.ru</email><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">The Research Institute of Obstetrics, Gynecology and Reproductology named after D.O. Ott</institution></aff><aff><institution xml:lang="ru">Научно-исследовательский институт акушерства, гинекологии и репродуктологии им. Д.О. Отта</institution></aff><aff><institution xml:lang="zh"></institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2024-07-17" publication-format="electronic"><day>17</day><month>07</month><year>2024</year></pub-date><volume>73</volume><issue>3</issue><issue-title xml:lang="en"/><issue-title xml:lang="ru"/><issue-title xml:lang="zh"/><fpage>81</fpage><lpage>88</lpage><history><date date-type="received" iso-8601-date="2024-04-16"><day>16</day><month>04</month><year>2024</year></date><date date-type="accepted" iso-8601-date="2024-04-27"><day>27</day><month>04</month><year>2024</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2024, Eсо-Vector</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2024, Эко-Вектор</copyright-statement><copyright-statement xml:lang="zh">Copyright ©; 2024,</copyright-statement><copyright-year>2024</copyright-year><copyright-holder xml:lang="en">Eсо-Vector</copyright-holder><copyright-holder xml:lang="ru">Эко-Вектор</copyright-holder><ali:free_to_read xmlns:ali="http://www.niso.org/schemas/ali/1.0/" start_date="2027-07-17"/><license><ali:license_ref xmlns:ali="http://www.niso.org/schemas/ali/1.0/">https://eco-vector.com/for_authors.php#07</ali:license_ref></license></permissions><self-uri xlink:href="https://journals.eco-vector.com/jowd/article/view/630372">https://journals.eco-vector.com/jowd/article/view/630372</self-uri><abstract xml:lang="en"><p><bold>BACKGROUND: </bold>Early reproductive loss is a complex problem, the solution of which requires a systematic approach to the study of the morphogenesis of gravid transformation. Violations of the morphofunctional characteristics of the endometrium are associated with chronic endometritis, which entails implantation pathology and the development of pregnancy, while formulating indications for the use of IVF methods. Chronic endometritis disrupts the differentiation of stromal cells and intermediate filaments with subsequent pathology of decidualization and gravid transformation.</p> <p><bold>AIM: </bold>The aim of this study was to evaluate vimentin expression in decidual cells of the gravid endometrium in an undeveloped first-trimester pregnancy after IVF, depending on its transformation in patients with chronic endometritis.</p> <p><bold>MATERIALS AND METHODS: </bold>Histological and immunohistochemical studies were performed on 40 samples of abortion material with normal chorionic villi karyotype from a non-developing pregnancy after IVF in patients with chronic endometritis and 15 samples of abortion material from a progressive pregnancy, surgically terminated at the woman’s request at similar terms. Two groups were formed — I group with a full-fledged gravid transformation in a non-developing pregnancy after IVF (<italic>n</italic> = 20) and II group with an incomplete gravid transformation in a non-developing pregnancy after IVF (<italic>n</italic> = 20). Histological examination was performed according to the standard procedure. Immunohistochemical study was performed using a one-step protocol with antigen unmasking. Primary monoclonal antibodies to vimentin (Clon V9, Diagnostic BioSystems Inc., Spain) were used at a 1 : 1000 dilution. Vimentin expression was evaluated in the compact layer of the gravid endometrium.</p> <p><bold>RESULTS: </bold>A full-fledged gravid transformation of the endometrial stroma in the abortion material in study group I and the control group was represented by mature deciduocytes of the epithelioid type, round or polygonal in shape, with a light vesicular nucleus. With an incomplete gravid transformation, the compact layer of the gravid endometrium was represented by fibroblasts with varying degrees of cytoplasmic development, from mild changes to the formation of pre-decidual and immature decidual cells. A decrease in vimentin expression was verified in the gravid endometrium after IVF compared to the control group. In case of an incomplete gravid transformation, a decrease in vimentin expression was also verified compared to the control group and study group I.</p> <p><bold>CONCLUSIONS: </bold>The presence of chronic endometritis in patients with infertility and chronic endometritis not only causes pathology of the original endometrium, but also disrupts decidualization, leading to reproductive loss with normal embryo karyotype.</p></abstract><trans-abstract xml:lang="ru"><p><bold>Обоснование. </bold>Репродуктивные потери на ранних сроках гестации представляют собой сложную проблему. Для ее решения необходим системный подход к изучению звеньев морфогенеза гравидарной трансформации. Нарушение морфофункциональных характеристик эндометрия ассоциировано с хроническим эндометритом, способным препятствовать как имплантации, так и развитию наступившей беременности, формируя показания для использования методов ЭКО. Хронический эндометрит нарушает дифференцировку стромальных клеток и промежуточных филаментов с последующей патологией децидуализации и гравидарной трансформации.</p> <p><bold>Цель исследования </bold>— изучить экспрессию виментина в децидуальных клетках гравидарного эндометрия при неразвивающейся беременности в I триместре после ЭКО в зависимости от трансформации эндометрия у пациенток с хроническим эндометритом.</p> <p><bold>Материалы и методы. </bold>Гистологическое и иммуногистохимическое исследования проведены на 40 образцах абортивного материала с нормальным кариотипом ворсин хориона при неразвивающейся беременности после ЭКО у пациенток с хроническим эндометритом и 15 образцах абортивного материала прогрессирующей беременности, прерванной по желанию женщины хирургическим путем на аналогичных сроках. Сформировано две группы: I группа с полноценной гравидарной трансформацией при неразвивающейся беременности после ЭКО (<italic>n</italic> = 20), II группа — с неполноценной гравидарной трансформацией при неразвивающейся беременности после ЭКО (<italic>n</italic> = 20). Гистологическое исследование проведено по стандартной методике. Иммуногистохимическое исследование выполнено с использованием одноэтапного протокола с демаскировкой антигена. Использовали первичные моноклональные антитела к виментину (Clon V9, Diagnostic BioSystems Inc., Испания) в разведении 1 : 1000. Экспрессию виментина оценивали в компактном слое гравидарного эндометрия.</p> <p><bold>Результаты. </bold>Полноценная гравидарная трансформация стромы эндометрия в абортивном материале I группы исследования и контрольной группы представлена зрелыми децидуоцитами эпителиоидного типа округлой или полигональной формы со светлым пузырьковидным ядром. При неполноценной гравидарной трансформации компактный слой гравидарного эндометрия представлен фибробластами с разной выраженностью развития цитоплазмы: от слабо выраженных изменений до формирования предецидуальных и незрелых децидуальных клеток. В гравидарном эндометрии после ЭКО верифицировано статистически значимое снижение экспрессии виментина по сравнению с показателем в контрольной группе. При неполноценной гравидарной трансформации также верифицировано значимое снижение экспрессии по сравнению со данными в контрольной и I группах исследования.</p> <p><bold>Заключение. </bold>Наличие хронического эндометрита у пациенток с бесплодием не только приводит к патологии исходного эндометрия, но и нарушает процессы децидуализации, приводя к репродуктивным потерям при нормальном кариотипе эмбриона.</p></trans-abstract><trans-abstract xml:lang="zh"><p/></trans-abstract><kwd-group xml:lang="en"><kwd>decidualization</kwd><kwd>undeveloped pregnancy</kwd><kwd>in vitro fertilization</kwd><kwd>vimentin expression</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>децидуализация</kwd><kwd>неразвивающаяся беременность</kwd><kwd>экстракорпоральное оплодотворение</kwd><kwd>экспрессия виментина</kwd></kwd-group><funding-group><funding-statement xml:lang="en">The work was performed within the framework of the exploratory scientific study No.1022040700846-2-3.2.2;3.1.9 “Development of an algorithm for morphological diagnosis in non-developing pregnancy after ART in women with endometrial dysfunction” by the Ministry of Science and Higher Education of the Russian Federation (state registration number 123120700017-4)</funding-statement><funding-statement xml:lang="ru">Работа выполнена в рамках поискового научного исследования № 1022040700846-2-3.2.2;3.1.9 «Разработка алгоритма морфологической диагностики при неразвивающейся беременности после ВРТ у женщин с эндометриальной дисфункцией» Министерства науки и высшего образования Российской Федерации (номер государственной регистрации 123120700017-4)</funding-statement></funding-group></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><citation-alternatives><mixed-citation xml:lang="en">Tral TG, Tolibova GH. 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