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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">dan</journal-id><journal-title-group><journal-title xml:lang="ru">Доклады Национальной академии наук Беларуси</journal-title><trans-title-group xml:lang="en"><trans-title>Doklady of the National Academy of Sciences of Belarus</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">1561-8323</issn><issn pub-type="epub">2524-2431</issn><publisher><publisher-name>The Republican Unitary Enterprise Publishing House "Belaruskaya Navuka"</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.29235/1561-8323-2022-66-2-206-216</article-id><article-id custom-type="elpub" pub-id-type="custom">dan-1056</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>МЕДИЦИНА</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>MEDICINE</subject></subj-group></article-categories><title-group><article-title>Об участии монооксида азота в механизмах реализации инфаркт-лимитирующего эффекта посткондиционирования с помощью лактата при ишемии-реперфузии миокарда у молодых и старых крыс</article-title><trans-title-group xml:lang="en"><trans-title>Nitrogen monoxide participation in the mechanisms of realization of the infarction-limiting effect of post-conditioning using lactate during myocardial ischemia-reperfusion in young and old rats</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Висмонт</surname><given-names>Ф. И.</given-names></name><name name-style="western" xml:lang="en"><surname>Vismont</surname><given-names>F. I.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Висмонт Франтишек Иванович – член-корреспондент, доктор медицинских наук, профессор, заведующий кафедрой</p><p>пр. Дзержинского, 83, 220116, Минск</p></bio><bio xml:lang="en"><p>Vismont Frantishek I. – Corresponding Member, D. Sc. (Medicine), Professor, Head of the Department</p><p>83, Dzerzhinski Ave., 220116, Minsk</p></bio><email xlink:type="simple">patfiz@bsmu.by</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Чепелев</surname><given-names>С. Н.</given-names></name><name name-style="western" xml:lang="en"><surname>Chepelev</surname><given-names>S. N.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Чепелев Сергей Николаевич – старший преподаватель</p><p>пр. Дзержинского, 83, 220116, Минск</p></bio><bio xml:lang="en"><p>Chepelev Sergey N. – Senior Lecturer</p><p>83, Dzerzhinski Ave., 220116, Minsk</p></bio><email xlink:type="simple">drserge1991@gmail.com</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Губкин</surname><given-names>С. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Goubkin</surname><given-names>S. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Губкин Сергей Владимирович – член-корреспондент, доктор медицинских наук, профессор, директор</p><p>ул. Академическая, 28, 220072, Минск</p></bio><bio xml:lang="en"><p>Goubkin Sergey V. – Corresponding Member, D. Sc. (Medicine), Professor, Director</p><p>28, Akademicheskaya Str., 220072, Minsk</p></bio><email xlink:type="simple">goubkin@yandex.ru</email><xref ref-type="aff" rid="aff-2"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Белорусский государственный медицинский университет</institution></aff><aff xml:lang="en"><institution>Belarusian State Medical University</institution></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Институт физиологии Национальной академии наук Беларуси</institution></aff><aff xml:lang="en"><institution>Institute of Physiology of the National Academy of Sciences of Belarus</institution></aff></aff-alternatives><pub-date pub-type="collection"><year>2022</year></pub-date><pub-date pub-type="epub"><day>06</day><month>05</month><year>2022</year></pub-date><volume>66</volume><issue>2</issue><fpage>206</fpage><lpage>216</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Висмонт Ф.И., Чепелев С.Н., Губкин С.В., 2022</copyright-statement><copyright-year>2022</copyright-year><copyright-holder xml:lang="ru">Висмонт Ф.И., Чепелев С.Н., Губкин С.В.</copyright-holder><copyright-holder xml:lang="en">Vismont F.I., Chepelev S.N., Goubkin S.V.</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://doklady.belnauka.by/jour/article/view/1056">https://doklady.belnauka.by/jour/article/view/1056</self-uri><abstract><p> </p><p>Сердечно-сосудистые заболевания являются основной причиной смертности и инвалидизации населения в экономически развитых странах мира. Принимая во внимание высокую медицинскую, социальную и экономическую значимость проблемы лечения пациентов с ишемической болезнью сердца и острым инфарктом миокарда, поиск новых эффективных методов предупреждения или ослабления неблагоприятных последствий ишемического и реперфузионного повреждения миокарда и выяснение механизмов их реализации является актуальной задачей современной экспериментальной и клинической медицины. Целью исследования было выяснить участие монооксида азота (NO) в механизмах реализации инфаркт-лимитирующего эффекта посткондиционирования (ПостК) с помощью лактата при ишемии-реперфузии миокарда у молодых и старых крыс. В результате проведенного исследования установлено, что ПостК с помощью лактата (10 мг/кг), осуществляемое на 25-й минуте реперфузии миокарда после 30-минутной острой коронароокклюзии оказывает инфаркт-лимитирующий эффект как у молодых, так и у старых крыс. Однако в условиях системного действия в организме животных ингибитора NO-синтазы метилового эфира NG-нитро-L-аргинина в дозе 25 мг/кг (внутривенное введение за 5 мин до начала реперфузии и за 30 мин до ПостК) кардиопротекторный эффект ПостК с помощью лактата сохранялся у молодых крыс только частично. Инфаркт-лимитирующий эффект ПостК с помощью лактата у старых крыс сохранялся полностью. Полученные данные дают основание полагать, что активность NO-синтазы и уровень NO в крови имеют значимость в механизмах реализации инфаркт-лимитирующего эффекта ПостК с помощью лактата у молодых, но не у старых крыс.</p></abstract><trans-abstract xml:lang="en"><p>Cardiovascular diseases are the main cause of death and disability in the economically developed countries of the world. Taking into account the high medical, social, and economic importance of the problem of treating patients with coronary heart disease and acute myocardial infarction, the search for new effective methods how to prevent or weaken the unfavorable effects of ischemic and reperfusion myocardial injury and to find out the mechanisms of their implementation is an urgent task of modern experimental and clinical medicine. The aim of the study was to elucidate the participation of nitric oxide (NO) in the mechanisms of realization of the infarct-limiting effect of post-conditioning (PostC) with lactate during myocardial ischemia-reperfusion in young and old rats. According to the study results, it was found that PostC with lactate (10 mg/kg), carried out at the 25th minute of myocardial reperfusion after 30-minute acute coronary occlusion, has an infarction-limiting effect in both young and old rats. However, in the animals under the conditions of systemic action of an inhibitor of NO-synthase of NG-nitro-L-arginine methyl ester at a dose of 25 mg/kg (intravenous administration 5 minutes before the start of reperfusion and 30 minutes before PostC), the cardioprotective effect of PostC with lactate was preserved only partially in young rats. The infarction-limiting effect of PostC with lactate was fully preserved in old rats. The data obtained suggest that the activity of NO-synthase and the NO level in the blood are significant in the mechanisms of implementation of the infarct-limiting effect of PostC with lactate in young, but not in old rats.</p><p> </p></trans-abstract><kwd-group xml:lang="ru"><kwd>посткондиционирование миокарда</kwd><kwd>лактат</kwd><kwd>монооксид азота</kwd><kwd>инфаркт-лимитирующий эффект</kwd><kwd>кардиопротекция</kwd><kwd>ишемия</kwd><kwd>реперфузия</kwd><kwd>зона риска</kwd><kwd>зона некроза</kwd><kwd>пожилой возраст</kwd></kwd-group><kwd-group xml:lang="en"><kwd>myocardial postconditioning</kwd><kwd>lactate</kwd><kwd>nitric monoxide</kwd><kwd>infarction-limiting effect</kwd><kwd>cardioprotection</kwd><kwd>ischemia</kwd><kwd>reperfusion</kwd><kwd>area at risk</kwd><kwd>zone of infarction</kwd><kwd>elderly age</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">Кардиопротективные эффекты ишемического кондиционирования: современные представления о механизмах, экспериментальные подтверждения, клиническая реализация / А. 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