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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">cancersp</journal-id><journal-title-group><journal-title xml:lang="ru">Южно-Российский онкологический журнал/ South Russian Journal of Cancer</journal-title><trans-title-group xml:lang="en"><trans-title>South Russian Journal of Cancer</trans-title></trans-title-group></journal-title-group><issn pub-type="epub">2686-9039</issn><publisher><publisher-name>АНО "Перспективы онкологии"</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.37748/2686-9039-2025-6-1-6</article-id><article-id custom-type="edn" pub-id-type="custom">sbnfvk</article-id><article-id custom-type="elpub" pub-id-type="custom">cancersp-316</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 СТАТЬИ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>ORIGINAL ARTICLES</subject></subj-group></article-categories><title-group><article-title>Состояние процессов свободнорадикального окисления и антиоксидантной защиты в миоме матки и в эндометриоидной аденокарциноме в зависимости от ее степени дифференцировки</article-title><trans-title-group xml:lang="en"><trans-title>Free radical oxidation and antioxidant defense in uterine myoma and endometrioid adenocarcinoma depending on its degree of differentiation</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-4318-7587</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Сурикова</surname><given-names>Е. И.</given-names></name><name name-style="western" xml:lang="en"><surname>Surikova</surname><given-names>E. I.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Сурикова Екатерина Игоревна – к.б.н., старший научный сотрудник лаборатории изучения патогенеза злокачественных опухолей, ФГБУ «Национальный медицинский исследовательский центр онкологии» Министерства здравоохранения Российской Федерации, г. Ростов-на-Дону, Российская Федерация</p><p>ORCID: <ext-link xlink:href="https://orcid.org/0000-0002-4318-7587" ext-link-type="uri">https://orcid.org/0000-0002-4318-7587</ext-link>, SPIN: 2401-4115, AuthorID: 301537, ResearcherID: AAG-8748-2019, Scopus Author ID: 6507092816</p></bio><bio xml:lang="en"><p>Ekaterina I. Surikova – Cand. Sci. (Biol.), senior researcher at the Laboratory for the Study of Pathogenesis of Malignant Tumors, National Medical Research Centre for Oncology, Rostov-on-Don, Russian Federation</p><p>ORCID: <ext-link xlink:href="https://orcid.org/0000-0002-4318-7587" ext-link-type="uri">https://orcid.org/0000-0002-4318-7587</ext-link>, SPIN: 2401-4115, AuthorID: 301537, ResearcherID: AAG-8748-2019, Scopus Author ID: 6507092816</p></bio><email xlink:type="simple">sunsur2000@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/0000-0003-3618-6890</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Франциянц</surname><given-names>Е. М.</given-names></name><name name-style="western" xml:lang="en"><surname>Frantsiyants</surname><given-names>E. M.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Франциянц Елена Михайловна – д.б.н., профессор, заместитель генерального директора по научной работе, ФГБУ «Национальный медицинский исследовательский центр онкологии» Министерства здравоохранения Российской Федерации, г. Ростов-на-Дону, Российская Федерация</p><p>ORCID: <ext-link xlink:href="https://orcid.org/0000-0003-3618-6890" ext-link-type="uri">https://orcid.org/0000-0003-3618-6890</ext-link>, SPIN: 9427-9928, AuthorID: 462868, ResearcherID: Y-1491-2018, Scopus Author ID: 55890047700</p></bio><bio xml:lang="en"><p>Elena M. Frantsiyants – Dr. Sci. (Biol.), Professor, Deputy Director General for Scientific Work, National Medical Research Centre for Oncology, Rostov-on-Don, Russian Federation</p><p>ORCID: <ext-link xlink:href="https://orcid.org/0000-0003-3618-6890" ext-link-type="uri">https://orcid.org/0000-0003-3618-6890</ext-link>, SPIN: 9427-9928, AuthorID: 462868, ResearcherID: Y-1491-2018, Scopus Author ID: 55890047700</p></bio><email xlink:type="simple">super.gormon@yandex.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/0000-0002-3972-2452</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Каплиева</surname><given-names>И. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Kaplieva</surname><given-names>I. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Каплиева Ирина Викторовна – д.м.н., заведующая лабораторией изучения патогенеза злокачественных опухолей, ФГБУ «Национальный медицинский исследовательский центр онкологии» Министерства здравоохранения Российской Федерации, г. Ростов-на-Дону, Российская Федерация</p><p>ORCID: <ext-link xlink:href="https://orcid.org/0000-0002-3972-2452" ext-link-type="uri">https://orcid.org/0000-0002-3972-2452</ext-link>, SPIN: 5047-1541, AuthorID: 734116, ResearcherID: ААЕ-3540-2019, Scopus Author ID: 23994000800</p></bio><bio xml:lang="en"><p>Irina V. Kaplieva – Dr. Sci. (Med.), head of the Laboratory for the Study of the Pathogenesis of Malignant Tumors, National Medical Research Centre for Oncology, Rostov-on-Don, Russian Federation</p><p>ORCID: <ext-link xlink:href="https://orcid.org/0000-0002-3972-2452" ext-link-type="uri">https://orcid.org/0000-0002-3972-2452</ext-link>, SPIN: 5047-1541, AuthorID: 734116, ResearcherID: ААЕ-3540-2019, Scopus Author ID: 23994000800</p></bio><email xlink:type="simple">kaplirina@yandex.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/0000-0002-2302-8271</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Бандовкина</surname><given-names>В. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Bandovkina</surname><given-names>V. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Бандовкина Валерия Ахтямовна – д.б.н., ведущий научный сотрудник лаборатории изучения патогенеза злокачественных опухолей, ФГБУ «Национальный медицинский исследовательский центр онкологии» Министерства здравоохранения Российской Федерации, г. Ростов-на-Дону, Российская Федерация</p><p>ORCID: <ext-link xlink:href="https://orcid.org/0000-0002-2302-8271" ext-link-type="uri">https://orcid.org/0000-0002-2302-8271</ext-link>, SPIN: 8806-2641, AuthorID: 696989, ResearcherID: AAG-8708-2019, Scopus Author ID: 57194276288</p></bio><bio xml:lang="en"><p>Valeriya A. Bandovkina – Dr. Sci. (Biol.), senior researcher at the Laboratory for the Study of Pathogenesis of Malignant Tumors, National Medical Research Centre for Oncology, Rostov-on-Don, Russian Federation</p><p>ORCID: <ext-link xlink:href="https://orcid.org/0000-0002-2302-8271" ext-link-type="uri">https://orcid.org/0000-0002-2302-8271</ext-link>, SPIN: 8806-2641, AuthorID: 696989, ResearcherID: AAG-8708-2019, Scopus Author ID: 57194276288</p></bio><email xlink:type="simple">valerryana@yandex.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/0000-0003-2713-8598</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Немашкалова</surname><given-names>Л. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Nemashkalova</surname><given-names>L. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Немашкалова Людмила Анатольевна – научный сотрудник лаборатории изучения патогенеза злокачественных опухолей, ФГБУ «Национальный медицинский исследовательский центр онкологии» Министерства здравоохранения Российской Федерации, г. Ростов-на-Дону, Российская Федерация</p><p>ORCID: <ext-link xlink:href="https://orcid.org/0000-0003-2713-8598" ext-link-type="uri">https://orcid.org/0000-0003-2713-8598</ext-link>, SPIN: 1355-8652, AuthorID: 734146, Scopus Author ID: 7801520904</p></bio><bio xml:lang="en"><p>Lyidmila A. Nemashkalova – researcher at Laboratory of Malignant Tumor Pathogenesis Study, National Medical Research Centre for Oncology, Rostov-on-Don, Russian Federation</p><p>ORCID: <ext-link xlink:href="https://orcid.org/0000-0003-2713-8598" ext-link-type="uri">https://orcid.org/0000-0003-2713-8598</ext-link>, SPIN: 1355-8652, AuthorID: 734146, Scopus Author ID: 7801520904</p></bio><email xlink:type="simple">nemalit@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/0000-0002-7395-3086</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Нескубина</surname><given-names>И. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Neskubina</surname><given-names>I. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Нескубина Ирина Валерьевна – д.б.н., старший научный сотрудник лаборатории изучения патогенеза злокачественных опухолей, ФГБУ «Национальный медицинский исследовательский центр онкологии» Министерства здравоохранения Российской Федерации, г. Ростов-на-Дону, Российская Федерация</p><p>ORCID: <ext-link xlink:href="https://orcid.org/0000-0002-7395-3086" ext-link-type="uri">https://orcid.org/0000-0002-7395-3086</ext-link>, SPIN: 3581-8531, AuthorID: 794688, ResearcherID: AAG-8731-2019, Scopus Author ID: 6507509066</p></bio><bio xml:lang="en"><p>Irina V. Neskubina – Dr. Sci. (Biol.), senior researcher at the Laboratory for the Study of the Pathogenesis of Malignant Tumors, National Medical Research Centre for Oncology, Rostov-on-Don, Russian Federation</p><p>ORCID: <ext-link xlink:href="https://orcid.org/0000-0002-7395-3086" ext-link-type="uri">https://orcid.org/0000-0002-7395-3086</ext-link>, SPIN: 3581-8531, AuthorID: 794688, ResearcherID: AAG-8731-2019, Scopus Author ID: 6507509066</p></bio><email xlink:type="simple">neskubina.irina@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/0000-0003-4037-7649</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Моисеенко</surname><given-names>Т. И.</given-names></name><name name-style="western" xml:lang="en"><surname>Moiseenko</surname><given-names>T. I.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Моисеенко Татьяна Ивановна – д.м.н., профессор, главный научный сотрудник отдела опухолей репродуктивной системы, ФГБУ «Национальный медицинский исследовательский центр онкологии» Министерства здравоохранения Российской Федерации, г. Ростов-на-Дону, Российская Федерация</p><p>ORCID: <ext-link xlink:href="https://orcid.org/0000-0003-4037-7649" ext-link-type="uri">https://orcid.org/0000-0003-4037-7649</ext-link>, SPIN: 6341-0549, AuthorID: 705829</p></bio><bio xml:lang="en"><p>Tatiana I. Moiseenko – Dr. Sci. (Med.), Professor, chief researcher, Section of Reproductive Tumors, National Medical Research Centre for Oncology, Rostov-on-Don, Russian Federation</p><p>ORCID: <ext-link xlink:href="https://orcid.org/0000-0003-4037-7649" ext-link-type="uri">https://orcid.org/0000-0003-4037-7649</ext-link>, SPIN: 6341-0549, AuthorID: 705829</p></bio><email xlink:type="simple">moiseenko48@inbox.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/0000-0002-7968-5078</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Меньшенина</surname><given-names>А. П.</given-names></name><name name-style="western" xml:lang="en"><surname>Menshenina</surname><given-names>A. P.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Меньшенина Анна Петровна – д.м.н., ведущий научный сотрудник отдела опухолей репродуктивной системы, ФГБУ «Национальный медицинский исследовательский центр онкологии» Министерства здравоохранения Российской Федерации, г. Ростов-на-Дону, Российская Федерация</p><p>ORCID: <ext-link xlink:href="https://orcid.org/0000-0002-7968-5078" ext-link-type="uri">https://orcid.org/0000-0002-7968-5078</ext-link>, SPIN: 6845-4794, AuthorID: 715810, Scopus Author ID: 57191983118</p></bio><bio xml:lang="en"><p>Anna P. Menshenina – Dr. Sci. (Med.), leading researcher, Section of Reproductive Tumors, National Medical Research Centre for Oncology, Rostov-on-Don, Russian Federation</p><p>ORCID: <ext-link xlink:href="https://orcid.org/0000-0002-7968-5078" ext-link-type="uri">https://orcid.org/0000-0002-7968-5078</ext-link>, SPIN: 6845-4794, AuthorID: 715810, Scopus Author ID: 57191983118</p></bio><email xlink:type="simple">anna.menshenina.00@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/0009-0003-7909-2883</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Рогозин</surname><given-names>М. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Rogozin</surname><given-names>M. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Рогозин Марк Андреевич – аспирант отдела опухолей репродуктивной системы, ФГБУ «Национальный медицинский исследовательский центр онкологии» Министерства здравоохранения Российской Федерации, г. Ростов-на-Дону, Российская Федерация</p><p>ORCID: <ext-link xlink:href="https://orcid.org/0009-0003-7909-2883" ext-link-type="uri">https://orcid.org/0009-0003-7909-2883</ext-link>, SPIN: 3965-1806, AuthorID: 1238353</p></bio><bio xml:lang="en"><p>Mark A. Rogozin – PhD student, Section of Reproductive Tumors, National Medical Research Centre for Oncology, Rostov-on-Don, Russian Federation</p><p>ORCID: <ext-link xlink:href="https://orcid.org/0009-0003-7909-2883" ext-link-type="uri">https://orcid.org/0009-0003-7909-2883</ext-link>, SPIN: 3965-1806, AuthorID: 1238353</p></bio><email xlink:type="simple">mark.rogozin@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/0000-0002-1084-5176</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Вереникина</surname><given-names>Е. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Verenikina</surname><given-names>E. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Вереникина Екатерина Владимировна – д.м.н., доцент, заведующая отделением онкогинекологии, ФГБУ «Национальный медицинский исследовательский центр онкологии» Министерства здравоохранения Российской Федерации, г. Ростов-на-Дону, Российская Федерация</p><p>ORCID: <ext-link xlink:href="https://orcid.org/0000-0002-1084-5176" ext-link-type="uri">https://orcid.org/0000-0002-1084-5176</ext-link>, SPIN: 6610-7824, AuthorID: 734269, Scopus Author ID: 57194271506</p></bio><bio xml:lang="en"><p>Ekaterina V. Verenikina – Dr. Sci. (Med.), MD, Head of Department of Oncogynecology, National Medical Research Centre for Oncology, Rostov-on-Don, Russian Federation</p><p>ORCID: <ext-link xlink:href="https://orcid.org/0000-0002-1084-5176" ext-link-type="uri">https://orcid.org/0000-0002-1084-5176</ext-link>, SPIN: 6610-7824, AuthorID: 734269, Scopus Author ID: 57194271506</p></bio><email xlink:type="simple">ekat.veren@yandex.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/0000-0003-4188-3746</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Адамян</surname><given-names>М. Л.</given-names></name><name name-style="western" xml:lang="en"><surname>Adamyan</surname><given-names>M. L.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Адамян Мери Людвиковна – к.м.н., научный сотрудник отдела опухолей репродуктивной системы, ФГБУ «Национальный медицинский исследовательский центр онкологии» Министерства здравоохранения Российской Федерации, г. Ростов-на-Дону, Российская Федерация</p><p>ORCID: <ext-link xlink:href="https://orcid.org/0000-0003-4188-3746" ext-link-type="uri">https://orcid.org/0000-0003-4188-3746</ext-link>, SPIN: 9929-3414, AuthorID: 710702</p></bio><bio xml:lang="en"><p>Mery L. Adamyan – Cand. Sci. (Med.), researcher, Section of Reproductive Tumors, National Medical Research Centre for Oncology, Rostov-on-Don, Russian Federation</p><p>ORCID: <ext-link xlink:href="https://orcid.org/0000-0003-4188-3746" ext-link-type="uri">https://orcid.org/0000-0003-4188-3746</ext-link>, SPIN: 9929-3414, AuthorID: 710702</p></bio><email xlink:type="simple">adamyan.meri@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>ФГБУ «Национальный медицинский исследовательский центр онкологии» Министерства здравоохранения Российской Федерации</institution><country>Россия</country></aff><aff xml:lang="en"><institution>National Medical Research Centre for Oncology</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2025</year></pub-date><pub-date pub-type="epub"><day>20</day><month>02</month><year>2025</year></pub-date><volume>6</volume><issue>1</issue><fpage>50</fpage><lpage>59</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Сурикова Е.И., Франциянц Е.М., Каплиева И.В., Бандовкина В.А., Немашкалова Л.А., Нескубина И.В., Моисеенко Т.И., Меньшенина А.П., Рогозин М.А., Вереникина Е.В., Адамян М.Л., 2025</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="ru">Сурикова Е.И., Франциянц Е.М., Каплиева И.В., Бандовкина В.А., Немашкалова Л.А., Нескубина И.В., Моисеенко Т.И., Меньшенина А.П., Рогозин М.А., Вереникина Е.В., Адамян М.Л.</copyright-holder><copyright-holder xml:lang="en">Surikova E.I., Frantsiyants E.M., Kaplieva I.V., Bandovkina V.A., Nemashkalova L.A., Neskubina I.V., Moiseenko T.I., Menshenina A.P., Rogozin M.A., Verenikina E.V., Adamyan M.L.</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.cancersp.com/jour/article/view/316">https://www.cancersp.com/jour/article/view/316</self-uri><abstract><sec><title>Цель исследования</title><p>Цель исследования. Оценить особенности свободнорадикального окисления (СРО) и основных ферментативных и неферментативных звеньев антиоксидантной защиты в пролиферирующих тканях доброкачественной миомы и злокачественной эндометриоидной аденокарциномы (ЭА) с различной степенью ее дифференцировки.</p></sec><sec><title>Пациенты и методы</title><p>Пациенты и методы. Обследованы больные, получившие хирургическое лечение по поводу ЭА (n = 42) и миомы матки (n = 14). Больные с ЭА Ia (n = 26) и Ib (n = 16) стадией. У 16 больных была высокодифференцированная (G1) ЭА, у 12 умереннодифференцированная (G2) ЭА, у 14 низкодифференцированная (G3) ЭА. В тканях ЭА, миомы, интактной матки колориметрически определяли активность ферментов супероксиддисмутазы (СОД), каталазы, глутатионпероксидазы (ГПО), глутатионтрансферазы (ГТ), содержание восстановленного глутатиона (GSH), витаминов А/Е, продуктов перекисного окисления липидов (ПОЛ) диеновых конъюгатов (ДК) и малонового диальдегида (МДА).</p></sec><sec><title>Результаты</title><p>Результаты. По сравнению с уровнем в интактной ткани в миоме снижалась СОД в 3,2 раза и увеличивалась ГТ в 2,7 раза (p &lt; 0,01). Аналогичные изменения отмечены для ЭА G1 – в среднем в 5,3 раза (p &lt; 0,01) и увеличение ДК в 2,2 раза (p &lt; 0,05). В ткани ЭА G2 активность СОД и ГПО была ниже, чем в интактной ткани, соответственно в 5,7 и 4,5 раза (p &lt; 0,05) и более низкие ГТ, ГПО и GSH, чем при ЭА G1, соответственно в 4,9, 8,9 и 1,6 раз (p &lt; 0,05 – p &lt; 0,01). В ткани ЭА G3 отмечен рост GSH, ГПО и ГТ от 1,5 до 7,1 раза (p &lt; 0,05 – p &lt; 0,01) и продуктов ПОЛ в среднем в 2,5 раза (p &lt; 0,05), а также снижение витаминов А и Е в 2,9 и 4,6 раза соответственно (p &lt; 0,05) по сравнению с интактной тканью. Ткань ЭА G2 отличалась минимальным уровнем активности GSH-зависимой системы.</p></sec><sec><title>Заключение</title><p>Заключение. Результаты отражают различия механизмов регуляции пролиферации посредством СРО в миомах и в ткани ЭА при изменении ее дифференцировки. Знание особенностей отдельных звеньев регуляции СРО может играть определенную роль в назначении антиоксидантной терапии доброкачественных или злокачественных опухолей матки.</p></sec></abstract><trans-abstract xml:lang="en"><sec><title>Purpose of the study</title><p>Purpose of the study. To evaluate the features of free radical oxidation (FRO) and the principal enzymatic and non-enzymatic links of antioxidant defense in proliferating tissues of benign myoma and malignant endometrioid adenocarcinoma (EA) with varying degrees of differentiation.</p></sec><sec><title>Patients and methods</title><p>Patients and methods. Patients who received surgical treatment for EA (n = 42) and uterine myoma (n = 14) were examined. Patients with stage Ia (n = 26) and stage Ib (n = 16) of disease were selected. 16 patients had highly differentiated (G1) EA, 12 had moderately differentiated (G2) EA, and 14 had low-differentiated (G3) EA. The activity of superoxide dismutase (SOD), catalase, glutathione peroxidase (GPx), glutathione transferase (GST), reduced glutathione (GSH), vitamins A and E, lipid peroxidation products diene conjugates (DC) and malondialdehyde (MDA) were determined colorimetrically in the tissues of EA, myoma and intact uterus.</p></sec><sec><title>Results</title><p>Results. Compared with the level in intact tissue, SOD decreased by 3.2 times and GST increased by 2.7 times in myoma (p &lt; 0.01). Similar changes were noted for EA G1 – on average by 5.3 times (p &lt; 0.01) and also DC increased by 2.2 times (p &lt; 0.05). In EA G2 tissue, SOD and GPx activities were lower than in the intact tissue, by 5.7 and 4.5 times, respectively (p &lt; 0.05), and lower GST, GPx and GSH than in the EA G1, by 4.9, 8.9 and 1.6 times, respectively (p &lt; 0.05 – p &lt; 0.01). In EA G3 tissue, there was an increase in GSH, GPx and GST from 1.5 to 7.1 times (p &lt; 0.05 – p &lt; 0.01) and lipid peroxidation products by an average of 2.5 times (p &lt; 0.05), as well as a decrease in vitamins A and E by 2.9 and 4.6 times, respectively (p &lt; 0.05) compared with the intact tissue. The tissue of the EA G2 had a minimal level of activity of the GSH-dependent system.</p></sec><sec><title>Conclusion</title><p>Conclusion. The results reflect the differences in the mechanisms of proliferation regulation by FRO in myomas and in the EA tissue with changes in its differentiation. Knowledge of the characteristics of individual links in the regulation of FRO can play a certain role in the use of antioxidant therapy for benign or malignant tumors of the uterus.</p></sec></trans-abstract><kwd-group xml:lang="ru"><kwd>рак эндометрия</kwd><kwd>миома матки</kwd><kwd>эндометриоидная аденокарцинома</kwd><kwd>степень дифференцировки</kwd><kwd>свободнорадикальное окисление</kwd><kwd>антиоксидантные ферменты</kwd><kwd>глутатионзависимая система</kwd><kwd>витамины А и Е</kwd></kwd-group><kwd-group xml:lang="en"><kwd>endometrial cancer</kwd><kwd>uterine myoma</kwd><kwd>endometrioid adenocarcinoma</kwd><kwd>degree of differentiation</kwd><kwd>free radical oxidation</kwd><kwd>antioxidant enzymes</kwd><kwd>glutathione-dependent system</kwd><kwd>vitamins A and E</kwd></kwd-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Шаталова С. В., Ульянова Е. П., Моисеенко Т. 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