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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="en"><front><journal-meta><journal-id journal-id-type="publisher-id">rpcardio</journal-id><journal-title-group><journal-title xml:lang="en">Rational Pharmacotherapy in Cardiology</journal-title><trans-title-group xml:lang="ru"><trans-title>Рациональная Фармакотерапия в Кардиологии</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">1819-6446</issn><issn pub-type="epub">2225-3653</issn><publisher><publisher-name>«SILICEA-POLIGRAF» LLC</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.20996/1819-6446-2025-3149</article-id><article-id custom-type="edn" pub-id-type="custom">NZEGLS</article-id><article-id custom-type="elpub" pub-id-type="custom">rpcardio-3149</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="en"><subject>CURRENT QUESTIONS OF CLINICAL PHARMACOLOGY</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="ru"><subject>АКТУАЛЬНЫЕ  ВОПРОСЫ  КЛИНИЧЕСКОЙ ФАРМАКОЛОГИИ</subject></subj-group></article-categories><title-group><article-title>Replenishment of intracellular magnesium deficiency in cardiac arrhythmias: focus on the physicochemical properties of complex compounds</article-title><trans-title-group xml:lang="ru"><trans-title>Восполнение внутриклеточного дефицита магния при нарушениях сердечного ритма: в фокусе физико-химические свойства комплексных соединений</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-4401-2209</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Божко</surname><given-names>Я. Г.</given-names></name><name name-style="western" xml:lang="en"><surname>Bozhko</surname><given-names>Ya. G.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Божко Яков Григорьевич, аспирант кафедры терапии ФПК и ПП</p><p>Екатеринбург</p></bio><bio xml:lang="en"><p>Yakov G. Bozhko</p><p>Yekaterinburg</p></bio><email xlink:type="simple">yakov-bozhko@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/0009-0007-0737-7045</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Белоконова</surname><given-names>Н. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Belokonova</surname><given-names>N. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Белоконова Надежда Анатольевна, заведующий кафедрой общей химии</p><p>Екатеринбург</p></bio><bio xml:lang="en"><p>Nadezhdа А. Belokonova</p><p>Yekaterinburg</p></bio><email xlink:type="simple">89221503087@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/0000-0002-8271-7253</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Медведева</surname><given-names>О. М.</given-names></name><name name-style="western" xml:lang="en"><surname>Medvedeva</surname><given-names>O. M.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Медведева Ольга Михайловна, доцент кафедры общей химии</p><p>Екатеринбург</p></bio><bio xml:lang="en"><p>Olga M. Medvedeva</p><p>Yekaterinburg</p></bio><email xlink:type="simple">olgapeter48@gmail.com</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-4432-8863</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Бутова</surname><given-names>К. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Butova</surname><given-names>K. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Бутова Ксения Андреевна </p><p>Екатеринбург</p></bio><bio xml:lang="en"><p>Kseniya A. Butova</p><p>Yekaterinburg</p></bio><email xlink:type="simple">butchini@mail.ru</email><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-3601-9830</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Архипов</surname><given-names>М. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Arkhipov</surname><given-names>M. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Архипов Михаил Викторович, профессор кафедры поликлинической терапии</p><p>Екатеринбург</p></bio><bio xml:lang="en"><p>Mikhail V. Arkhipov</p><p>Yekaterinburg</p></bio><email xlink:type="simple">markhipov55@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>ФГБОУ ВО "Уральский государственный медицинский университет" Минздрава России</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Ural State Medical University</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>ФГБУН "Институт иммунологии и физиологии" Уральского отделения Российской академии наук</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Institute of Immunology and Physiology of the Ural Branch of the Russian Academy of Sciences</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2025</year></pub-date><pub-date pub-type="epub"><day>30</day><month>06</month><year>2025</year></pub-date><volume>21</volume><issue>2</issue><fpage>155</fpage><lpage>165</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Bozhko Y.G., Belokonova N.A., Medvedeva O.M., Butova K.A., Arkhipov M.V., 2025</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="ru">Божко Я.Г., Белоконова Н.А., Медведева О.М., Бутова К.А., Архипов М.В.</copyright-holder><copyright-holder xml:lang="en">Bozhko Y.G., Belokonova N.A., Medvedeva O.M., Butova K.A., Arkhipov M.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://www.rpcardio.online/jour/article/view/3149">https://www.rpcardio.online/jour/article/view/3149</self-uri><abstract><sec><title>Aim</title><p>Aim. To identify the most promising drug composition for replenishing intracellular magnesium deficiency by eveluating the physicochemical properties of magnesium complex compounds and conducting experiments on isolated rat atrial cardiomyocytes.</p></sec><sec><title>Materials and methods</title><p>Materials and methods. The study assessed the osmolality of solutions containing magnesium complex compounds, their extraction into organic solvents of different polarity (chloroform and butanol), and diffusion through a cell membrane model (lecithin-modified paper filter). In experiments on isolated rat atrial cardiomyocytes, the compositions were tested for replenishment of intracellular (cytosolic) magnesium deficiency using laser scanning (confocal) microscopy.</p></sec><sec><title>Results</title><p>Results. Based on physicochemical testing of magnesium preparations and experiments conducted on cardiomyocytes of laboratory animals, the most promising system for replenishing intracellular magnesium was a system based on magnesium aspartate, in which the ratio of magnesium ions to aspartic acid is 1 to 2.5. Thirty-minute incubation with this preparation led to increased cytosolic [Mg2+]i by 115% compared to control. Removal of excess potassium ions from the potassium aspartate and magnesium system shifted pH toward a more physiological range (from 6.8 to 7.3), while the lipophilic properties (organic solvent extraction and lecithin filter diffusion) doubled.</p></sec><sec><title>Conclusion</title><p>Conclusion. The paper presents a methodological approach for analyzing of magnesium complex compounds for replenishing its intracellular deficiency, emphasizing complex type, concentration, lipophilicity, and original system osmolality. Experimental findings were confirmed in a translational experiment with isolated atrial cardiomyocytes, which allows us to identify the most promising complex in relation to replenishing intracellular magnesium deficiency.</p></sec></abstract><trans-abstract xml:lang="ru"><sec><title>Цель</title><p>Цель. На основе оценки физико-химических свойств комплексных соединений магния и экспериментов с изолированными предсердными кардиомиоцитами крысы выявить наиболее перспективный состав лекарственного препарата, влияющий на восполнение внутриклеточного дефицита магния.</p></sec><sec><title>Материалы и методы</title><p>Материалы и методы. Проводились оценка осмоляльности растворов, содержащих комплексные соединения магния, их экстракция в органические растворители разной полярности (хлороформ и бутанол), а также определение диффузии через модель клеточной мембраны (бумажный фильтр, модифицированный лецитином). В экспериментах на изолированных предсердных кардиомиоцитах крысы проведено тестирование составов на восполнение внутриклеточного (цитозольного) дефицита магния с применением методов лазерной сканирующей (конфокальной) микроскопии.</p></sec><sec><title>Результаты</title><p>Результаты. Исходя из экспериментальных данных, полученных в ходе физико-химического тестирования препаратов магния и опытов, проведённых на кардиомиоцитах лабораторных животных, наиболее перспективным в отношении восполнения внутриклеточного магния оказалась система на основе аспарагината магния, в которой соотношение ионов магния к аспарагиновой кислоте составляет 1 к 2,5. 30-мин инкубация кардиомиоцитов с данным препаратом приводила к повышению цитозольного [Mg2+]i на 115% относительно значений контрольного уровня. Удаление избытка ионов калия из системы аспарагината калия и магния смещает рН в сторону более физиологичного значения (от 6,8 до 7,3), при этом липофильные свойства (экстракция в органические растворители и диффузия через лецитиновый фильтр) усиливаются в два раза.</p></sec><sec><title>Заключение</title><p>Заключение. В работе представлен методологический подход к анализу комплексных соединений магния для восполнения внутриклеточного дефицита, включающий тип комплексного соединения, его концентрацию, липофильность, а также осмоляльность исходной системы. Данные, полученные в ходе экспериментов, были подтверждены в трансляционном опыте с изолированными предсердными кардиомиоцитами, позволяющем выделить наиболее перспективный комплекс в отношении восполнения внутриклеточного дефицита магния.</p></sec></trans-abstract><kwd-group xml:lang="ru"><kwd>внутриклеточный дефицит магния</kwd><kwd>нарушения сердечного ритма</kwd><kwd>фибрилляция предсердий</kwd><kwd>комплексные соединения магния</kwd><kwd>изолированные предсердные кардиомиоциты</kwd><kwd>конфокальная лазерная сканирующая микроскопия</kwd><kwd>трансляционная медицина</kwd></kwd-group><kwd-group xml:lang="en"><kwd>intracellular magnesium deficiency</kwd><kwd>cardiac arrhythmias</kwd><kwd>atrial fibrillation</kwd><kwd>magnesium complex compounds</kwd><kwd>isolated atrial cardiomyocytes</kwd><kwd>confocal laser scanning microscopy</kwd><kwd>translational medicine</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">Jahnen-Dechent W, Ketteler M. 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