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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">RUDN Journal of Medicine</journal-id><journal-title-group><journal-title xml:lang="en">RUDN Journal of Medicine</journal-title><trans-title-group xml:lang="ru"><trans-title>Вестник Российского университета дружбы народов. Серия: Медицина</trans-title></trans-title-group></journal-title-group><issn publication-format="print">2313-0245</issn><issn publication-format="electronic">2313-0261</issn><publisher><publisher-name xml:lang="en">Peoples’ Friendship University of Russia named after Patrice Lumumba (RUDN University)</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">42015</article-id><article-id pub-id-type="doi">10.22363/2313-0245-2024-28-4-537-547</article-id><article-id pub-id-type="edn">HFDTYZ</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>PHARMACOLOGY</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>ФАРМАКОЛОГИЯ</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">New approaches to quality control of drugs from the group of branched polymers on the example of dextran</article-title><trans-title-group xml:lang="ru"><trans-title>Разработка новых подходов к контролю качества лекарственных средств группы разветвленных полимеров на примере декстрана</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0009-0006-9170-1313</contrib-id><name-alternatives><name xml:lang="en"><surname>Marchenkova</surname><given-names>Lianna A.</given-names></name><name xml:lang="ru"><surname>Марченкова</surname><given-names>Л. А.</given-names></name></name-alternatives><email>uspenskaya_ev@pfur.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0009-0004-5238-5042</contrib-id><name-alternatives><name xml:lang="en"><surname>Safdari</surname><given-names>Ainaz</given-names></name><name xml:lang="ru"><surname>Сафдари</surname><given-names>А.</given-names></name></name-alternatives><email>uspenskaya_ev@pfur.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-2147-8348</contrib-id><name-alternatives><name xml:lang="en"><surname>Uspenskaya</surname><given-names>Elena V.</given-names></name><name xml:lang="ru"><surname>Успенская</surname><given-names>Е. В.</given-names></name></name-alternatives><email>uspenskaya_ev@pfur.ru</email><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">RUDN University</institution></aff><aff><institution xml:lang="ru">Российский университет дружбы народов им. Патриса Лумумбы</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2024-12-15" publication-format="electronic"><day>15</day><month>12</month><year>2024</year></pub-date><volume>28</volume><issue>4</issue><issue-title xml:lang="en">ONCOLOGY</issue-title><issue-title xml:lang="ru">ОНКОЛОГИЯ</issue-title><fpage>537</fpage><lpage>547</lpage><history><date date-type="received" iso-8601-date="2024-12-16"><day>16</day><month>12</month><year>2024</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2024, Marchenkova L.A., Safdari A., Uspenskaya E.V.</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2024, Марченкова Л.А., Сафдари А., Успенская Е.В.</copyright-statement><copyright-year>2024</copyright-year><copyright-holder xml:lang="en">Marchenkova L.A., Safdari A., Uspenskaya E.V.</copyright-holder><copyright-holder xml:lang="ru">Марченкова Л.А., Сафдари А., Успенская Е.В.</copyright-holder><ali:free_to_read xmlns:ali="http://www.niso.org/schemas/ali/1.0/"/><license><ali:license_ref xmlns:ali="http://www.niso.org/schemas/ali/1.0/">https://creativecommons.org/licenses/by-nc/4.0</ali:license_ref></license></permissions><self-uri xlink:href="https://journals.rudn.ru/medicine/article/view/42015">https://journals.rudn.ru/medicine/article/view/42015</self-uri><abstract xml:lang="en"><p><italic>Relevance</italic>. Colloidal blood substitutes — polyglukins — have been used in infusion therapy for 70 years and are widely represented in modern pharmaceutical regulatory documentation. Glucose polymer with a (1→6) glycosidic linkages (dextran), as the main active pharmaceutical ingredient of polyglukins, has exceptional properties, such as long-term circulation in the bloodstream, inertness, volemic, detoxification, and antithrombotic effects. Quality authentication control of polyglukins usually includes FT-IR spectroscopy, while systems of polymeric micelles require characterization of dispersion and the electrophoretic properties that are in unambiguous correspondence with their biological activity. The aim of the study was to develop new approaches based on laser scattering methods to identify polymer-­based blood substitute drugs to complement existing regulatory documentation, and assess their biological activity using the <italic>Spirotox </italic>method. <italic>Materials and Methods</italic>. Reopolyglukin (Rpg) — an aqueous solution of dextran with a molecular weight of 30—40 kDa (Dex35) and 0.9% sodium chloride; water with different contents of the heavy isotope<bold>  , </bold>Malvern Zetasizer ZSP equipment for measuring hydrodynamic radius (d, nm), zeta potential of colloids (ξ, mV);<italic> </italic>Biotesting method with <italic>Spiostomum ambigia</italic> cell for evaluating survival time in different dilutions of Rpg. <italic>Results and Discussion.</italic> Determination of submicron dispersity in the initial Rpg and in dilutions of water isotopologues indicates the presence of particles d<sub>50</sub>(Median) = 10 nm with a volume concentration V = 18% and a low polydispersity index PDI ~ 0.2. It is shown that the size distribution of nanoparticles is influenced by a noticeable effect is the concentration of the isotope. Biopharmaceutical analysis with the usage of Protozoa based on the Arrhenius kinetic model showed a decrease in the toxicity of aqueous solutions of Rpg in an environment with a reduced content of the isotope  .<italic> </italic>New approaches based on the use of laser analysis methods have been developed to characterize the dispersion properties and colloidal stability of polymer-­based blood substitutes. <italic>Conclusion.</italic> The results obtained can be included into the new edition of a pharmacopeial article on Reopolyglukin preparations.</p></abstract><trans-abstract xml:lang="ru"><p><italic>Актуальность.</italic> Коллоидные кровезаменители полиглюкины — применяются в инфузионной терапии на протяжении 70 лет и широко представлены в современной фармацевтической нормативной документации. Полимер глюкозы с (1→6)-типом связи (декстран), как основной активный фармацевтический ингредиент полиглюкинов, обладает исключительными свой­ствами, такими, как длительной циркуляцией в кровотоке, инертностью, волемическим, детоксикационным, антитромботическим действием. Контроль качества полиглюкинов на подлинность включает, как правило, спектрометрию в ИК-области, тогда как системы полимерных мицелл требуют характеристику дисперсных и электрофоретических свой­ств, находящихся в однозначном соответствии с их биологической активностью. Цель работы — разработка новых подходов на основе методов лазерного рассеяния к идентификации препаратов-­полимерных кровезаменителей для дополнения существующей нормативной документации, а также оценки их биологической активности методом Spirotox. <italic>Материалы и методы</italic>. Реополиглюкин (Rpg) — водный раствор декстрана молекулярной массой 30—40 кДа (Dex35) и 0,9 % хлорида натрия; вода с различным содержанием тяжелого изотопа; оборудование Malvern Zetasizer ZSP для измерения гидродинамического радиуса, дзета-­потенциала коллоидов; Spirotox-тест для оценки биологической активности различных разведений Rpg. <italic>Результаты и обсуждение</italic>. Определение субмикронной дисперсности в исходном Rpg и в разведениях водных изотопологов демонстрирует присутствие частиц d<sub>50</sub>(Median)~10 нм с объемной концентрацией V=18% и низким значением индекса полидисперсности PDI~0,2. Показано, что на распределение наночастиц по размерам оказывает заметное влияние концентрация изотопа<bold> </bold>. Биофармацевтический анализ с применением простейших на модели Аррениусовской кинетики показал снижение токсичности водных растворов Rpg в среде с пониженным содержанием изотопа<bold> </bold>. <italic>Выводы</italic>. Разработаны новых подходы, основанные на применении лазерных методов анализа, для характеристики дисперсных свой­ств и коллоидной устойчивости полимерных кровезаменителей. <italic>Выводы.</italic> Полученные результаты могут быть включены в новую редакцию фармакопейных статей на препараты Реополиглюкина.</p></trans-abstract><kwd-group xml:lang="en"><kwd>hemodynamic blood substitutes</kwd><kwd>dextran</kwd><kwd>Leuconostoc mesenteroides producer</kwd><kwd>laser light scattering</kwd><kwd>colloidal stability</kwd><kwd>polydispersity index</kwd><kwd>optical activity</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>гемодинамические кровезаменители</kwd><kwd>декстран</kwd><kwd>Leuconostoc mesenteroides продуцент</kwd><kwd>лазерноесветорассеяние</kwd><kwd>коллоидная устойчивость</kwd><kwd>индекс полидисперсности</kwd><kwd>оптическая активность</kwd></kwd-group><funding-group><funding-statement xml:lang="en">This publication has been supported by the RUDN University Scientific Projects Grant System, project № 033320-0-000.</funding-statement><funding-statement xml:lang="ru">Публикация выполнена в рамках проекта № 033320-0-000 Системы грантовой поддержки научных проектов РУДН.</funding-statement></funding-group></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Thomas H, Tim L, Brigitte H, Stephanie H. Functional Polymers Based on Dextran. 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