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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">vestib</journal-id><journal-title-group><journal-title xml:lang="ru">Известия Национальной  академии наук Беларуси. Серия биологических наук</journal-title><trans-title-group xml:lang="en"><trans-title>Proceedings of the National Academy of Sciences of Belarus, Biological Series</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">1029-8940</issn><issn pub-type="epub">2524-230X</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">10.29235/1029-8940-2023-68-1-55-63</article-id><article-id custom-type="elpub" pub-id-type="custom">vestib-850</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>Статьи</subject></subj-group></article-categories><title-group><article-title>Оценка влияния модифицированных пиримидиновых производных нуклеиновых кислот на бактериальные клетки</article-title><trans-title-group xml:lang="en"><trans-title>Estimation of the activity of modified pyrimidine nucleoside derivatives on bacteria cells</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>Шихад</surname><given-names>А.</given-names></name><name name-style="western" xml:lang="en"><surname>Shihad</surname><given-names>A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Аршед Шихад – аспирант</p><p>ул. Долгобродская, 23/1, 220070, г. Минск</p></bio><bio xml:lang="en"><p>Arshed Shihad – Postgraduate student</p><p>23/1, Dolgobrodskaya Str., 220070, Minsk</p></bio><email xlink:type="simple">almansoriarshed@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>Сыса</surname><given-names>А. Г.</given-names></name><name name-style="western" xml:lang="en"><surname>Sysa</surname><given-names>A. G.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Алексей Григорьевич Сыса – канд. хим. наук, доцент</p><p>ул. Долгобродская, 23/1, 220070, г. Минск</p></bio><bio xml:lang="en"><p>Aliaksei G. Sysa – Ph. D. (Chem.), Associate Professor</p><p>23/1, Dolgobrodskaya Str., 220070, Minsk</p></bio><email xlink:type="simple">aliaksei.sysa@iseu.by</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Международный государственный экологический институт имени А. Д. Сахарова Белорусского государственного университета</institution></aff><aff xml:lang="en"><institution>International Sakharov Environmental Institute of Belarusian State University</institution></aff></aff-alternatives><pub-date pub-type="collection"><year>2023</year></pub-date><pub-date pub-type="epub"><day>10</day><month>02</month><year>2023</year></pub-date><volume>68</volume><issue>1</issue><fpage>55</fpage><lpage>63</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Шихад А., Сыса А.Г., 2023</copyright-statement><copyright-year>2023</copyright-year><copyright-holder xml:lang="ru">Шихад А., Сыса А.Г.</copyright-holder><copyright-holder xml:lang="en">Shihad A., Sysa A.G.</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://vestibio.belnauka.by/jour/article/view/850">https://vestibio.belnauka.by/jour/article/view/850</self-uri><abstract><p>Широкое применение антибиотиков привело к возникновению и быстрому распространению резистентности у микроорганизмов, что обусловливает необходимость поиска новых классов антибактериальных препаратов. Хорошо известна способность производных компонентов нуклеиновых кислот ингибировать рост эукариотических клеток, однако их антимикробные свойства изучены недостаточно. Нами обнаружено, что модифицированные нуклеозиды арабинофуранозилцитозин (цитарабин, ara-C), [1-(2′,3′,5′-три-О-ацетил-β-D-рибофуранозил)- 4-(1,2,4-триазол-1-ил)]урацил (TTU) и нуклеотиды цитарабин-5′-монофосфат (ara-CMP) и O2,2′-циклоцитидин- 5′-монофосфат (циклоцитидинмонофосфат, цикло-CMP) способны ингибировать рост штаммов Escherichia coli, Sarcina lutea, Bacillus cereus и Proteus mirabilis. Показано, что грамотрицательные бактериальные штаммы (E. coli и P. mirabilis) более чувствительны к воздействию TTU и цикло-CMP и менее чувствительны к воздействию ara-C и ara-CMP по сравнению с грамположительными. Наиболее эффективным ингибитором роста клеток грамположи- тельных штаммов (S. lutea, B. cereus) оказался ара-CMP с ED50 = 5,2–10–5 и ED50 = 3,1·10–4 М соответственно. S. lutea оказалась наиболее чувствительным штаммом бактерий к воздействию всех изученных соединений. Установлено, что изученные модифицированные производные пиримидиновых нуклеозидов усиливают выработку внутриклеточных активных форм кислорода (АФК). Наибольшее повышение уровня АФК при культивировании клеток обнаружено в случае грамотрицательного штамма E. coli в присутствии TTU, а также цикло-CMP, что сильно коррелирует с эффектом ингибирования роста клеток. Обнаружена сильная корреляция между уровнем АФК и жизнеспособностью штамма B. cereus после культивирования с ara-CMP.</p></abstract><trans-abstract xml:lang="en"><p>The increase in prevalence of antimicrobial-resistant bacteria (ARB) is currently a serious threat, thus there is a need for new classes antimicrobial compounds to combat infections caused by these ARB. The growth inhibition ability of derivatives of the components of nucleic acids has been well-characterized but not for its antimicrobial characteristics. It was found that modified nucleosides arabinofuranosylcytosine (cytarabine, ara-C), [1-(2′,3′,5′-tri-O-acetyl-β-D-ribofuranosyl)- 4-(1,2,4-triazol-1-yl)]uracil (TTU), and nucleotides cytarabine-5′-monophosphate (ara-CMP), and O2,2′-cyclocytidine-5′- monophosphate (cyclocytidine monophosphate, cyclo-CMP) were able to inhibit Escherichia coli, Sarcina lutea, Bacillus cereus, and Proteus mirabilis strains in a time and dose dependent manner via killing kinetics assay. It was demonstrated that studied modified pyrimidine nucleosides derivatives enhanced the production of intracellular reactive oxygen species (ROS) over time (validated via DCFA-DA probe assay). This study has revealed the mechanism of action of cytarabine, cyclocytidine monophosphate, and TTU as an antimicrobial agent for the first time, and has shown that these pyrimidine derivatives enhanced might be able to combat infections caused by E. coli, S. lutea, B. cereus, and P. mirabilis in the future.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>антибактериальная активность</kwd><kwd>модифицированные нуклеотиды</kwd><kwd>цитарабин</kwd><kwd>жизнеспособность</kwd><kwd>окислительный стресс</kwd><kwd>АФК</kwd></kwd-group><kwd-group xml:lang="en"><kwd>antibacterial activity</kwd><kwd>modified nucleosides</kwd><kwd>cytarabine</kwd><kwd>viability</kwd><kwd>oxidative stress</kwd><kwd>ROS</kwd></kwd-group><funding-group><funding-statement xml:lang="en">The authors would like to thank the Belarusian Republican Foundation for Fundamental research (grant No. М20МС-043) for partial funding this research.</funding-statement></funding-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Nathan C., Cars O. 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