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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">Doklady Biological Sciences</journal-id><journal-title-group><journal-title xml:lang="en">Doklady Biological Sciences</journal-title><trans-title-group xml:lang="ru"><trans-title>Доклады Российской академии наук. Науки о жизни</trans-title></trans-title-group></journal-title-group><issn publication-format="print">2686-7389</issn><issn publication-format="electronic">3034-5057</issn><publisher><publisher-name xml:lang="en">The Russian Academy of Sciences</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">693496</article-id><article-id pub-id-type="doi">10.31857/S2686738925040024</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>Articles</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>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">Role of preoperative stress in Wistar rats at myocardial injury during extracardiac surgery</article-title><trans-title-group xml:lang="ru"><trans-title>Роль предоперационного стрессирования крыс Вистар в повреждении миокарда при внесердечной операции</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Kondashevskaya</surname><given-names>M. V.</given-names></name><name xml:lang="ru"><surname>Кондашевская</surname><given-names>М. В.</given-names></name></name-alternatives><email>marivladiko@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Manukhina</surname><given-names>E. B.</given-names></name><name xml:lang="ru"><surname>Манухина</surname><given-names>Е. Б.</given-names></name></name-alternatives><email>marivladiko@mail.ru</email><xref ref-type="aff" rid="aff2"/><xref ref-type="aff" rid="aff3"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Aleksankina</surname><given-names>V. V.</given-names></name><name xml:lang="ru"><surname>Алексанкина</surname><given-names>В. В.</given-names></name></name-alternatives><email>marivladiko@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Artemyeva</surname><given-names>K. A.</given-names></name><name xml:lang="ru"><surname>Артемьева</surname><given-names>К. А.</given-names></name></name-alternatives><email>marivladiko@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Kaktursky</surname><given-names>L. V.</given-names></name><name xml:lang="ru"><surname>Кактурский</surname><given-names>Л. В.</given-names></name></name-alternatives><email>marivladiko@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Avtsyn Research Institute of Human Morphology Federal State Budgetary Scientific Institution “Petrovsky National Research Centre of Surgery”</institution></aff><aff><institution xml:lang="ru">Научно-­исследовательский институт морфологии человека имени академика А. П. Авцына Федерального государственного бюджетного научного учреждения “Российский научный центр хирургии имени академика Б. В. Петровскогo”</institution></aff></aff-alternatives><aff-alternatives id="aff2"><aff><institution xml:lang="en">Federal State Budgetary Scientific Institution “Research Institute of General Pathology and Pathophysiology”</institution></aff><aff><institution xml:lang="ru">ФГБНУ “Научно-­исследовательский институт общей патологии и патофизиологии”</institution></aff></aff-alternatives><aff id="aff3"><institution>University of North Texas Health Science Center</institution></aff><pub-date date-type="pub" iso-8601-date="2025-08-15" publication-format="electronic"><day>15</day><month>08</month><year>2025</year></pub-date><volume>523</volume><issue>1</issue><issue-title xml:lang="en">VOL 523, NO (2025)</issue-title><issue-title xml:lang="ru">ТОМ 523, № (2025)</issue-title><fpage>389</fpage><lpage>396</lpage><history><date date-type="received" iso-8601-date="2025-10-16"><day>16</day><month>10</month><year>2025</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2025, Russian Academy of Sciences</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2025, Российская академия наук</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="en">Russian Academy of Sciences</copyright-holder><copyright-holder xml:lang="ru">Российская академия наук</copyright-holder></permissions><self-uri xlink:href="https://journals.eco-vector.com/2686-7389/article/view/693496">https://journals.eco-vector.com/2686-7389/article/view/693496</self-uri><abstract xml:lang="en"><p>The work was performed on 4 groups of old Wistar rats: anesthesia only (An), noncardiac surgery (NS), extracardiac surgery (ES) with prior stress for 5 days (SNS), and intact animals used as a control. As evident from the absence of increases in proinflammatory cytokines and C-reactive protein 10 days after the surgery, the animals did not have any inflammation. The presence of stress was judged by the highest level of corticosterone in the SNS rats. These animals had myocardial injury after NS (MINS) indicated by structural and metabolic disorders, as well as an increase in the blood concentration of high-sensitive cardiac troponin I (hs-cTnI). Despite the fact that the rats in the An and NS groups had some ischemic zones in the myocardium, they did not develop MINS, since there was no oxidant-antioxidant imbalance and, most importantly, no increase in hs-cTnI. This study showed for the first time that “simple” aseptic noncardiac surgery in combination with preoperative stress can induce MINS in healthy Wistar rats. It is proposed to use a decrease in the level of superoxide dismutase as an additional biomarker of MINS.</p></abstract><trans-abstract xml:lang="ru"><p>Работа выполнена на 4-х группах старых крыс Вистар: подвергавшихся действию одного только наркоза (Нар), внесердечной хирургической операции (ХО), ХО с предварительным стрессированием в течение 5 дней (СХО), контролем служили интактные животные. Судя по отсутствию повышения уровня провоспалительных цитокинов и С-реактивного белка через 10 дней после операции, у животных не наблюдалось воспаления. О наличии стресса судили по наиболее высокому уровню кортикостерона у крыс СХО. У этих животных, судя по структурным и метаболическим нарушениям, а также повышению в крови уровня высокочувствительного тропонина I (вч-сТнI), произошло повреждение миокарда после внесердечной операции (ПМВО). Несмотря на то, что у крыс групп Нар и ХО наблюдались зоны ишемии и гипоксии, у них не развивалось ПМВО, поскольку не происходило нарушения оксидантно-антиоксидантного баланса и, главное, отсутствовало повышение уровня вч-сТнI. В данной работе впервые доказано, что ПМВО развивается у здоровых старых крыс Вистар после проведения “простой” асептической внесердечной хирургической операции в сочетании с предоперационным стрессом. Предлагается использовать в качестве дополнительного биомаркера ПМВО снижение уровня супероксиддисмутазы.</p></trans-abstract><kwd-group xml:lang="en"><kwd>Wistar rats</kwd><kwd>extracardiac surgery</kwd><kwd>anesthesia</kwd><kwd>metabolic changes</kwd><kwd>myocardial ischemia</kwd><kwd>markers of myocardial damage</kwd><kwd>high-sensitivity cardiac troponin I</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>крысы Вистар</kwd><kwd>внесердечная хирургическая операция</kwd><kwd>наркоз</kwd><kwd>метаболические изменения</kwd><kwd>ишемия миокарда</kwd><kwd>маркеры повреждения миокарда</kwd><kwd>высокочувствительный тропонин I</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Исследование выполнено в рамках Государственного задания лаб. патологии клетки НИИ морфологии человека им. акад. А. П. Авцына ФГБНУ “РНЦХ им. акад. 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