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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">vestim</journal-id><journal-title-group><journal-title xml:lang="ru">Известия Национальной  академии наук Беларуси. Серия медицинских наук</journal-title><trans-title-group xml:lang="en"><trans-title>Proceedings of the National Academy of Sciences of Belarus, Medical series</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">1814-6023</issn><issn pub-type="epub">2524-2350</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">10.29235/1814-6023-2024-21-4-345-352</article-id><article-id custom-type="elpub" pub-id-type="custom">vestim-1003</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>КЛИНИЧЕСКАЯ И ЭКСПЕРИМЕНТАЛЬНАЯ МЕДИЦИНА</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>CLINICAL AND EXPERIMENTAL MEDICINE</subject></subj-group></article-categories><title-group><article-title>Антигипоксический эффект комбинации бемитила и тимохинона в условиях гиперкапнической гипоксии</article-title><trans-title-group xml:lang="en"><trans-title>Antihypoxic effect of a combination of bemethyl and thymoquinone under hypercapnic hypoxia</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>Рашкевич</surname><given-names>О. С.</given-names></name><name name-style="western" xml:lang="en"><surname>Rashkevich</surname><given-names>O. S.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Рашкевич Ольга Сергеевна – аспирант</p><p>пр. Дзержинского, 83, 220116, г. Минск</p></bio><bio xml:lang="en"><p>Olga S. Rashkevich – Postgraduate student</p><p>83, Dzerzhinski Ave., 220116, Minsk</p></bio><email xlink:type="simple">ola.rashkevich@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>Волчек</surname><given-names>А. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Vauchok</surname><given-names>A. U.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Волчек Александр Владимирович – канд. мед. наук, доцент</p><p>пр. Дзержинского, 83, 220116, г. Минск</p></bio><bio xml:lang="en"><p>Aliaksandr U. Vauchok – Ph. D. (Med.), Associate Professor</p><p>83, Dzerzhinski Ave., 220116, Minsk</p></bio><email xlink:type="simple">alexwolczek@gmail.com</email><xref ref-type="aff" rid="aff-1"/></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><pub-date pub-type="collection"><year>2024</year></pub-date><pub-date pub-type="epub"><day>30</day><month>11</month><year>2024</year></pub-date><volume>21</volume><issue>4</issue><fpage>345</fpage><lpage>352</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Рашкевич О.С., Волчек А.В., 2024</copyright-statement><copyright-year>2024</copyright-year><copyright-holder xml:lang="ru">Рашкевич О.С., Волчек А.В.</copyright-holder><copyright-holder xml:lang="en">Rashkevich O.S., Vauchok A.U.</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://vestimed.belnauka.by/jour/article/view/1003">https://vestimed.belnauka.by/jour/article/view/1003</self-uri><abstract><p>В работе на модели гиперкапнической гипоксии в герметичном объеме изучено антигипоксическое действие комбинации бемитила и тимохинона при их однократном внутрибрюшинном введении мышам. Тимохинон оказывал дозозависимое защитное действие, повышая устойчивость животных к гипоксии, в дозе 10 мг/кг увеличивал продолжительность жизни мышей на 75,9 % по сравнению с контрольной группой, а в дозе 30 мг/кг –  на 90,2 %. Рассчитанная методом регрессионного анализа среднеэффективная доза тимохинона на данной модели составила 14,1 мг/кг, среднеэффективная доза бемитила – 148 мг/кг. При сочетании бемитила и тимохинона в соотношении 5 : 1 активность соединений существенно возрастала, ED50 бемитила снижалась до 39,0 мг/кг, а аналогичный показатель тимохинона составил 7,8 мг/кг. Введение комбинации 100 мг/кг бемитила и 20 мг/кг тимохинона мышам приводило к увеличению продолжительности их жизни в стандартных условиях гипоксии до 41,2 ± 5,7 мин,  что на 120,5 % больше аналогичного показателя у животных, получавших плацебо. Анализ фармакодинамики комбинации препаратов по T. Chou показал аддитивный тип взаимодействия, характерный для соединений с различными молекулярными мишенями. Установлено, что комбинация бемитила и тимохинона в соотношении 5 : 1 демонстрирует фармакологический синергизм, что позволяет снижать дозы компонентов при их сочетанном применении в 1,8‒4,0 раза.</p></abstract><trans-abstract xml:lang="en"><p>The antihypoxic effect of a combination of bemethyl and thymoquinone after single intraperitoneal injection was studied in a model of hypercapnic hypoxia in a hermetic volume in mice. Thymoquinone had a dose-dependent protective effect by increasing the resistance of animals to hypoxia. At a dose of 10 mg/kg, it increased the life expectancy by 75.9 % compared with the control group, and at a dose of 30 mg/kg – by 90.2 %. The average effective dose of thymoquinone calculated by the regression analysis in this model was 14.1 mg/kg and the average effective dose of bemethyl was 148 mg/kg.  As part of a combination of bemethyl and thymoquinone in the ratio of 5 : 1, the activity of the compounds increases significantly, ED50 of bemethyl decreases to 39.0 mg/kg, the same indicator for thymoquinone becomes 7.8 mg/kg. Administration of a combination of 100 mg/kg of bemethyl and 20 mg/kg of thymoquinone to mice leads to increasing their lifespan under the standard hypoxic conditions up to 41.2 ± 5.7 minutes, which is 120.5 % more than in animals receiving placebo. The analysis of pharmacodynamics of a combination of drugs according to T. Chou showed an additive type  of interaction typical for compounds with different mechanisms of primary action. It was established that a combination  of bemethyl and thymoquinone in the weight ratio of 5 : 1 demonstrate synergism, which makes it possible to reduce 1.8–4.0 times the doses of components in their combined use. </p></trans-abstract><kwd-group xml:lang="ru"><kwd>бемитил</kwd><kwd>тимохинон</kwd><kwd>гипоксия</kwd><kwd>гиперкапния</kwd><kwd>мыши</kwd><kwd>антигипоксанты</kwd><kwd>синергичные комбинации</kwd></kwd-group><kwd-group xml:lang="en"><kwd>bemethyl</kwd><kwd>thymoquinone</kwd><kwd>hypoxia</kwd><kwd>hypercapnia</kwd><kwd>mice</kwd><kwd>antihypoxants</kwd><kwd>synergistic combinations</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">Лызиков, А. Н. 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