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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">RUDN Journal of Medicine</journal-id><journal-title-group><journal-title xml:lang="en">RUDN Journal of Medicine</journal-title><trans-title-group xml:lang="ru"><trans-title>Вестник Российского университета дружбы народов. Серия: Медицина</trans-title></trans-title-group></journal-title-group><issn publication-format="print">2313-0245</issn><issn publication-format="electronic">2313-0261</issn><publisher><publisher-name xml:lang="en">Peoples’ Friendship University of Russia named after Patrice Lumumba (RUDN University)</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">23399</article-id><article-id pub-id-type="doi">10.22363/2313-0245-2020-24-1-93-104</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>PHYSIOLOGY. EXPERIMENTAL PHYSIOLOGY</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>ФИЗИОЛОГИЯ. ЭКСПЕРИМЕНТАЛЬНАЯ ФИЗИОЛОГИЯ</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">State of the antioxidant protection system of rat liver in ischemia and reperfusion</article-title><trans-title-group xml:lang="ru"><trans-title>Состояние системы антиоксидантной защиты печени крыс при ишемии и реперфузии</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Popov</surname><given-names>Konstantin Andreevich</given-names></name><name xml:lang="ru"><surname>Попов</surname><given-names>Константин Андреевич</given-names></name></name-alternatives><email>naftalin444@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Bykov</surname><given-names>Ilia Mikhaylovich</given-names></name><name xml:lang="ru"><surname>Быков</surname><given-names>Илья Михайлович</given-names></name></name-alternatives><email>naftalin444@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Tsymbalyuk</surname><given-names>Igor Yuryevich</given-names></name><name xml:lang="ru"><surname>Цымбалюк</surname><given-names>Игорь Юрьевич</given-names></name></name-alternatives><email>naftalin444@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Denisova</surname><given-names>Yana Evgenievna</given-names></name><name xml:lang="ru"><surname>Денисова</surname><given-names>Яна Евгеньевна</given-names></name></name-alternatives><email>naftalin444@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Stolyarova</surname><given-names>Anzhela Nikolaevna</given-names></name><name xml:lang="ru"><surname>Столярова</surname><given-names>Анжела Николаевна</given-names></name></name-alternatives><email>naftalin444@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Azimov</surname><given-names>Erustam Adamovich</given-names></name><name xml:lang="ru"><surname>Азимов</surname><given-names>Эрустам Адамович</given-names></name></name-alternatives><email>naftalin444@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Shurygina</surname><given-names>Larisa Alekseevna</given-names></name><name xml:lang="ru"><surname>Шурыгина</surname><given-names>Лариса Алексеевна</given-names></name></name-alternatives><email>naftalin444@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Kuban state medical university</institution></aff><aff><institution xml:lang="ru">Кубанский государственный медицинский университет</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2020-12-15" publication-format="electronic"><day>15</day><month>12</month><year>2020</year></pub-date><volume>24</volume><issue>1</issue><issue-title xml:lang="en">VOL 24, NO1 (2020)</issue-title><issue-title xml:lang="ru">ТОМ 24, №1 (2020)</issue-title><fpage>93</fpage><lpage>104</lpage><history><date date-type="received" iso-8601-date="2020-04-08"><day>08</day><month>04</month><year>2020</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2020, Popov K.A., Bykov I.M., Tsymbalyuk I.Y., Denisova Y.E., Stolyarova A.N., Azimov E.A., Shurygina L.A.</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2020, Попов К.А., Быков И.М., Цымбалюк И.Ю., Денисова Я.Е., Столярова А.Н., Азимов Э.А., Шурыгина Л.А.</copyright-statement><copyright-year>2020</copyright-year><copyright-holder xml:lang="en">Popov K.A., Bykov I.M., Tsymbalyuk I.Y., Denisova Y.E., Stolyarova A.N., Azimov E.A., Shurygina L.A.</copyright-holder><copyright-holder xml:lang="ru">Попов К.А., Быков И.М., Цымбалюк И.Ю., Денисова Я.Е., Столярова А.Н., Азимов Э.А., Шурыгина Л.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/">http://creativecommons.org/licenses/by/4.0</ali:license_ref></license></permissions><self-uri xlink:href="https://journals.rudn.ru/medicine/article/view/23399">https://journals.rudn.ru/medicine/article/view/23399</self-uri><abstract xml:lang="en"><p>Purpose: determination of the state of the antioxidant protection system of the cytosolic fraction and suspension of rat liver mitochondria after experimental ischemia and reperfusion. Materials and methods: the study was conducted using white mature rats, divided into 3 groups: the control group (n = 15); The 2nd group of animals (n = 15), from which the liver was taken after 15 minutes of liver ischemia; the 3rd group of rats (n = 15), from which the liver was taken after a 15-minute reperfusion period, followed by a 15-minute ischemic period. Mitochondrial suspension and cytosolic fraction were isolated from liver tissue. Results: the obtained research results showed the presence of certain pathobiochemical changes in the suspension of mitochondria and the cytosolic fraction after ischemia or reperfusion. In the mitochondrial suspension during the reperfusion period it was found an adaptive increase in the activity of glutathione peroxidase by 39% and glutathione reductase by 61%. In the cytosolic fraction, it was the most remarkable increase of the total antioxidant capacity by 38% already during ischemia and a progressive decrease in the level of reduced glutathione form by 26% in ischemic and 55% in reperfusion period. The change in the state of the antioxidant system occurred against the background of an increase in the number of products of oxidative modifications of biomolecules by 40% during ischemia and 2.2 times after reperfusion. Conclusion: The results indicate the need to develop not only a mitochondria-oriented correction of oxidative disorders, but also active support for the components of the cytosol, which provide the main accumulation of free radical damage products and their subsequent removal from the cell, which is essential for survival.</p></abstract><trans-abstract xml:lang="ru"><p>Цель: определение состояния системы антиоксидантной защиты цитозольной фракции и суспензии митохондрий печени крыс после экспериментальной ишемии и реперфузии. Материалы и методы: исследование проведено с использованием белых половозрелых крыс, разделенных на 3 группы: контрольная группа (n=15); 2-я группа животных (n=15), у которых забирали печень после 15-ти минут ишемии печени; 3-я группа крыс (n=15), у которых забирали печень после 15-минутного реперфузионного периода, следовавшего за 15-минутным ишемическим. Из ткани печени выделяли митохондриальную суспензию и цитозольную фракцию. Результаты: Полученные результаты исследований показали наличие особенностей патобиохимических изменений в суспензии митохондрий и цитозольной фракции после ишемии или реперфузии. В митохондриальной суспензии в период реперфузии установлено адаптационное увеличение активности глутатионпероксидазы на 39% и глутатионредуктазы на 61%. В цитозольной фракции наиболее значительно было увеличение общей антиоксидантной активности на 38% уже в период ишемии и прогрессирующее снижение уровня восстановленной формы глутатиона на 26% в ишемический и на 55% в реперфузионный период. Изменение состояния антиоксидантной системы происходило на фоне роста количества продуктов окислительных модификаций биомолекул на 40% в период ишемии и в 2,2 раза после реперфузии. Заключение: результаты указывают на необходимость разработки не только митохондриально-ориентированной коррекции окислительных нарушений, но и на активную поддержку компонентам цитозоля, обеспечивающим основное накопление продуктов свободнорадикальных повреждений и последующее удаление их из клетки, что является исключительно необходимым для выживания</p></trans-abstract><kwd-group xml:lang="en"><kwd>liver</kwd><kwd>ischemia</kwd><kwd>reperfusion</kwd><kwd>antioxidative system</kwd><kwd>mitochondria</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>печень</kwd><kwd>ишемия</kwd><kwd>реперфузия</kwd><kwd>антиоксидантная система</kwd><kwd>митохондрия</kwd></kwd-group><funding-group/></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><citation-alternatives><mixed-citation xml:lang="en">Vaos G., Zavras N. Antioxidants in experimental ischemiareperfusion injury of the testis: Where are we heading towards? World J. 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