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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">Russian Journal of Physiology</journal-id><journal-title-group><journal-title xml:lang="en">Russian Journal of Physiology</journal-title><trans-title-group xml:lang="ru"><trans-title>Российский физиологический журнал им. И.М. Сеченова</trans-title></trans-title-group></journal-title-group><issn publication-format="print">0869-8139</issn><issn publication-format="electronic">2658-655X</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">686259</article-id><article-id pub-id-type="doi">10.31857/S0869813925050041</article-id><article-id pub-id-type="edn">TNUBMG</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>EXPERIMENTAL ARTICLES</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>ЭКСПЕРИМЕНТАЛЬНЫЕ 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">Biocompatibility of Nicotinamide Riboside at Varying Dosages via Intravenous Administration</article-title><trans-title-group xml:lang="ru"><trans-title>Биосовместимость различных доз никотинамид рибозида при внутривенном способе введения</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Podyacheva</surname><given-names>E. Yu.</given-names></name><name xml:lang="ru"><surname>Подъячева</surname><given-names>Е. Ю.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>e-ekaterinapodyachevaspb@gmail.com</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Semenova</surname><given-names>N. Yu.</given-names></name><name xml:lang="ru"><surname>Семенова</surname><given-names>Н. Ю.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>ekaterinapodyachevaspb@gmail.com</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Mukhametdinova</surname><given-names>D. V.</given-names></name><name xml:lang="ru"><surname>Мухаметдинова</surname><given-names>Д. В.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>ekaterinapodyachevaspb@gmail.com</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Zelinskaya</surname><given-names>I. A.</given-names></name><name xml:lang="ru"><surname>Зелинская</surname><given-names>И. А.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>ekaterinapodyachevaspb@gmail.com</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Murashova</surname><given-names>L. A.</given-names></name><name xml:lang="ru"><surname>Мурашова</surname><given-names>Л. А.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>ekaterinapodyachevaspb@gmail.com</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Onopchenko</surname><given-names>A. V.</given-names></name><name xml:lang="ru"><surname>Онопченко</surname><given-names>А. В.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>ekaterinapodyachevaspb@gmail.com</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Shchelina</surname><given-names>E. V.</given-names></name><name xml:lang="ru"><surname>Щелина</surname><given-names>Е. В.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>ekaterinapodyachevaspb@gmail.com</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Martynov</surname><given-names>M. O.</given-names></name><name xml:lang="ru"><surname>Мартынов</surname><given-names>M. O.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>ekaterinapodyachevaspb@gmail.com</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Dyachuk</surname><given-names>V. A.</given-names></name><name xml:lang="ru"><surname>Дячук</surname><given-names>В. А.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>ekaterinapodyachevaspb@gmail.com</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Zinserling</surname><given-names>V. A.</given-names></name><name xml:lang="ru"><surname>Цинзерлинг</surname><given-names>В. А.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>e-ekaterinapodyachevaspb@gmail.com</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Toropova</surname><given-names>Ya. G.</given-names></name><name xml:lang="ru"><surname>Торопова</surname><given-names>Я. Г.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>e-ekaterinapodyachevaspb@gmail.com</email><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Almazov National Medical Research Centre</institution></aff><aff><institution xml:lang="ru">Национальный медицинский исследовательский центр им. В.А. Алмазова</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2025-05-15" publication-format="electronic"><day>15</day><month>05</month><year>2025</year></pub-date><volume>111</volume><issue>5</issue><issue-title xml:lang="en"/><issue-title xml:lang="ru"/><fpage>708</fpage><lpage>728</lpage><history><date date-type="received" iso-8601-date="2025-06-28"><day>28</day><month>06</month><year>2025</year></date><date date-type="accepted" iso-8601-date="2025-06-28"><day>28</day><month>06</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/0869-8139/article/view/686259">https://journals.eco-vector.com/0869-8139/article/view/686259</self-uri><abstract xml:lang="en"><p>Nicotinamide riboside (NR) serves as a precursor to NAD<sup>+</sup>. Numerous studies in the literature report on the oral administration of NR, demonstrating its beneficial effects on the progression of diseases such as cardiovascular, neurodegenerative, renal, hepatic, and others. Previously, a hypothesis was proposed by the authors suggesting a protective effect of intravenous NR administration against doxorubicin-induced myocardial damage. However, under this mode of administration, special attention must be given to the biocompatibility of NR when used at therapeutically effective doses. Thus, the aim of this study was to assess the biocompatibility of various NR doses with repeated intravenous administration in Wistar rats. The study employed doses of 150, 300, 450, and 600 mg/kg of NR (cumulative doses of 900, 1800, 2700, and 3600 mg/kg, respectively). During the study, the biocompatibility of NR was demonstrated at doses of 150, 300, and 450 mg/kg with repeated intravenous administration in rats. Even at the highest dose of 450 mg/kg, repeated intravenous administration showed no adverse effects on the parasympathetic ganglia of the autonomic nervous system in the heart. However, increasing the dose of NR led to several adverse side effects, including animal mortality, reduced tolerance to physical exertion, impaired cardiovascular function, and morphological and functional changes in the myocardium, liver, and kidneys.</p></abstract><trans-abstract xml:lang="ru"><p>Никотинамид рибозид (НР) является предшественником НАД<sup>+</sup>. В литературе представлено большое количество работ с использованием перорального способа введения НР, которые демонстрируют положительное влияние на течение таких заболеваний, как сердечно-сосудистые, нейродегенеративные, заболевания почек, печени и др. Ранее авторами была сформулирована гипотеза о наличии протективного эффекта внутривенного введения НР в отношении доксорубицин-индуцированного повреждения миокарда. Однако при данном способе введения отдельную значимость представляет информация о биосовместимости НР при его использовании в терапевтически эффективных дозах. В связи с этим целью работы явилось исследование биосовместимости различных доз НР при его многократном внутривенном введении крысам стока Wistar. В работе для введения использовались дозы 150, 300, 450 и 600 мг/кг НР (кумулятивные дозы составили 900, 1800, 2700, 3600 мг/кг соответственно). В ходе работы была продемонстрирована биосовместимость НР в дозах 150, 300, 450 мг/кг при его многократном внутривенном введении крысам. Доза 450 мг/кг при многократном внутривенном введении не сопровождалась негативным влиянием на парасимпатические ганглии автономной нервной системы сердца. В то же время использование дозы НР 600 мг/кг вызывало ряд негативных побочных эффектов в виде снижения работы сердечно-сосудистой системы, морфологических и функциональных изменений в миокарде, печени и почках, также наблюдалась частичная гибель животных, снижение толерантности к физическим нагрузкам.</p></trans-abstract><kwd-group xml:lang="en"><kwd>nicotinamide riboside</kwd><kwd>intravenous administration</kwd><kwd>dose dependence</kwd><kwd>morphology</kwd><kwd>cardiac ganglia of the autonomic nervous system</kwd><kwd>biocompatibility</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>никотинамид рибозид</kwd><kwd>внутривенное введение</kwd><kwd>дозозависимость</kwd><kwd>морфология</kwd><kwd>сердечные ганглии автономной нервной системы</kwd><kwd>биосовместимость</kwd></kwd-group><funding-group><award-group><funding-source><institution-wrap><institution xml:lang="ru">Министерство здравоохранения Российской Федерации</institution></institution-wrap><institution-wrap><institution xml:lang="en">Ministry of Health of the Russian Federation</institution></institution-wrap></funding-source><award-id>123021000147-5</award-id></award-group></funding-group></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Bieganowski P, Brenner C (2004) Discoveries of nicotinamide riboside as a nutrient and conserved NRK genes establish a preiss-handler independent route to NAD+ in fungi and humans. 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