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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">Journal of microbiology, epidemiology and immunobiology</journal-id><journal-title-group><journal-title xml:lang="en">Journal of microbiology, epidemiology and immunobiology</journal-title><trans-title-group xml:lang="ru"><trans-title>Журнал микробиологии, эпидемиологии и иммунобиологии</trans-title></trans-title-group></journal-title-group><issn publication-format="print">0372-9311</issn><issn publication-format="electronic">2686-7613</issn><publisher><publisher-name xml:lang="en">Central Research Institute for Epidemiology</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">13266</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>Articles</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>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">MODELING OF BRUCELLA PERSISTENCE IN MACROPHAGE-LIKE CELLS IN VITRO</article-title><trans-title-group xml:lang="ru"><trans-title>МОДЕЛИРОВАНИЕ ПЕРСИСТЕНЦИИ БРУЦЕЛЛ В МАКРОФАГОПОДОБНЫХ КЛЕТКАХ IN VITRO</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Kulakov</surname><given-names>Yu. K</given-names></name><name xml:lang="ru"><surname>Кулаков</surname><given-names>Ю. К</given-names></name></name-alternatives><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Zheludkov</surname><given-names>M. M</given-names></name><name xml:lang="ru"><surname>Желудков</surname><given-names>М. М</given-names></name></name-alternatives><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Zigangirova</surname><given-names>N. A</given-names></name><name xml:lang="ru"><surname>Зигангирова</surname><given-names>Н. А</given-names></name></name-alternatives><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Gamaleya Research Institute of Epidemiology and Microbiology, Moscow, Russia</institution></aff><aff><institution xml:lang="ru">НИИ эпидемиологии и микробиологии им. Н. Ф.Гамалеи, Москва</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2009-08-15" publication-format="electronic"><day>15</day><month>08</month><year>2009</year></pub-date><volume>86</volume><issue>4</issue><issue-title xml:lang="en">NO4 (2009)</issue-title><issue-title xml:lang="ru">№4 (2009)</issue-title><fpage>19</fpage><lpage>23</lpage><history><date date-type="received" iso-8601-date="2023-06-09"><day>09</day><month>06</month><year>2023</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2009, Kulakov Y.K., Zheludkov M.M., Zigangirova N.A.</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2009, Кулаков Ю.К., Желудков М.М., Зигангирова Н.А.</copyright-statement><copyright-year>2009</copyright-year><copyright-holder xml:lang="en">Kulakov Y.K., Zheludkov M.M., Zigangirova N.A.</copyright-holder><copyright-holder xml:lang="ru">Кулаков Ю.К., Желудков М.М., Зигангирова Н.А.</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/4.0</ali:license_ref></license></permissions><self-uri xlink:href="https://microbiol.crie.ru/jour/article/view/13266">https://microbiol.crie.ru/jour/article/view/13266</self-uri><abstract xml:lang="en"><p>Aim. To develop model of chronic brucellosis infection in macrophage-like cells in vitro and to study properties of persistence of Brucella in them. Materials and methods. Infection of macrophagelike cells U937 and phagocytes B10.MLM with analysis of B.melitensis 16M intracellular growth and persistence. Results. Dependence of intracellular growth and persistence of B.melitensis 16M strain in macrophages U937 from infection's multiplicity (IM) and activation of U937 cells, but not from preliminary intracellular adaptation of Brucella was demonstrated. Main parameters of infection (IM, centrifugation during phagocytosis, and time of phagocytosis) with B.melitensis 16M strain was modeled and their influence on persistence of the strain in B10.MLM phagocytes was studied. Centrifugation during phagocytosis resulted in development of longlasting persistence of B.melitensis 16M in B10.MLM phagocytes. Differences in persistence of Brucella in B10.MLM phagocytes compared with U937 macrophages were demonstrated. Conclusion. Intracellular persistence of Brucella in B10.MLM phagocytes depends from high antibacterial activity of the latter. Phagocytes B10.MLM could be used in assays for testing chemical compounds' activities against intracellular invasion and persistence of Brucella on early stages of infection.</p></abstract><trans-abstract xml:lang="ru"><p>Цель. Разработка модели хронической бруцеллезной инфекции в макрофагоподобных клетках in vitro и изучение особенностей персистенции в них бруцелл. Материалы и методы. Инфекция макрофагоподобных клеток U937 и фагоцитов B10.MLM с анализом внутриклеточного роста и персистенции B.melitensis 16M. Результаты. Показана зависимость внутриклеточного роста и персистенции штамма Brucella melitensis 16M в макрофагах U937 от множественности инфекции (МИ), активации клеток U937, но не от предварительной внутриклеточной адаптации бруцелл. Смоделированы основные параметры инфекции (МИ, центрифугирование при фагоцитозе и время фагоцитоза) штаммом B.melitensis 16M и изучено их влияние на персистенцию в фагоцитах B10. MLM. Центрифугирование при фагоцитозе приводило к развитию длительной персистенции B.melitensis 16M в фагоцитах B10.MLM. Продемонстрированы различия в персистенции бруцелл в фагоцитах B10.MLM при сравнении с макрофагами U937. Заключение . Внутриклеточная персистенция бруцелл в фагоцитах B10.MLM находится в зависимости от их высокой антибактериальной активности. Фагоциты B10.MLM могут быть использованы в тест-системе для проверки активности химических соединений на внутриклеточную инвазию и персистенцию бруцелл на ранних стадиях инфекции.</p></trans-abstract><kwd-group xml:lang="en"><kwd>Brucella melitensis 16M</kwd><kwd>intracellular reproduction</kwd><kwd>persistence</kwd><kwd>macrophages U937</kwd><kwd>phagocytes B10.MLM</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>внутриклеточное размножение</kwd><kwd>персистенция</kwd><kwd>макрофаги U937</kwd><kwd>фагоциты B10.MLM</kwd></kwd-group></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Желудков М.М., Кулаков Ю.К., Алексеева Н.В., Толмачева Т.А. Использование иммуноферментного анализа и полимеразной цепной реакции для оценки персистенции возбудителя бруцеллеза. Журн. микробиол. 2003, 4, 67-71.</mixed-citation></ref><ref id="B2"><label>2.</label><mixed-citation>Зигангирова Н.А., Гинцбург А. Л. 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