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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">microbe</journal-id><journal-title-group><journal-title xml:lang="ru">Проблемы особо опасных инфекций</journal-title><trans-title-group xml:lang="en"><trans-title>Problems of Particularly Dangerous Infections</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">0370-1069</issn><issn pub-type="epub">2658-719X</issn><publisher><publisher-name>Russian Research Anti-Plague Institute “Microbe”</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.21055/0370-1069-2020-3-62-69</article-id><article-id custom-type="elpub" pub-id-type="custom">microbe-1365</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>ОРИГИНАЛЬНЫЕ СТАТЬИ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>ORIGINAL ARTICLES</subject></subj-group></article-categories><title-group><article-title>Характеристика иммуногенных и протективных свойств модифицированных вариантов штамм а Francisella tularensis 15 НИИЭГ</article-title><trans-title-group xml:lang="en"><trans-title>Characterization of Immunogenic and Protective Properties of the Modified Variants of the Strain Francisella tularensis 15 NIIEG</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-3159-6439</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Карцева</surname><given-names>А. С.</given-names></name><name name-style="western" xml:lang="en"><surname>Kartseva</surname><given-names>A. S.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Российская Федерация, 142279, Московская обл., п. О боленск</p></bio><bio xml:lang="en"><p>Obolensk, Moscow Region, 142279, Russian Federation</p></bio><email xlink:type="simple">kartseva_as@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/0000-0002-2838-6879</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Калмантаева</surname><given-names>О. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Kalmantaeva</surname><given-names>O. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Российская Федерация, 142279, Московская обл., п. О боленск</p></bio><bio xml:lang="en"><p>Obolensk, Moscow Region, 142279, Russian Federation</p></bio><email xlink:type="simple">info@obolensk.org</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-5329-2807</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Силкина</surname><given-names>М. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Silkina</surname><given-names>M. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Российская Федерация, 142279, Московская обл., п. О боленск</p></bio><bio xml:lang="en"><p>Obolensk, Moscow Region, 142279, Russian Federation</p></bio><email xlink:type="simple">info@obolensk.org</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-1959-1739</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Комбарова</surname><given-names>Т. И.</given-names></name><name name-style="western" xml:lang="en"><surname>Kombarova</surname><given-names>T. I.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Российская Федерация, 142279, Московская обл., п. О боленск</p></bio><bio xml:lang="en"><p>Obolensk, Moscow Region, 142279, Russian Federation</p></bio><email xlink:type="simple">info@obolensk.org</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-9107-5304</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Павлов</surname><given-names>В. М.</given-names></name><name name-style="western" xml:lang="en"><surname>Pavlov</surname><given-names>V. M.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Российская Федерация, 142279, Московская обл., п. О боленск</p></bio><bio xml:lang="en"><p>Obolensk, Moscow Region, 142279, Russian Federation</p></bio><email xlink:type="simple">info@obolensk.org</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-3675-8780</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Мокриевич</surname><given-names>А. Н.</given-names></name><name name-style="western" xml:lang="en"><surname>Mokrievich</surname><given-names>A. N.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Российская Федерация, 142279, Московская обл., п. О боленск</p></bio><bio xml:lang="en"><p>Obolensk, Moscow Region, 142279, Russian Federation</p></bio><email xlink:type="simple">info@obolensk.org</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-9898-9894</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Фирстова</surname><given-names>В. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Firstova</surname><given-names>V. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Российская Федерация, 142279, Московская обл., п. О боленск</p></bio><bio xml:lang="en"><p>Obolensk, Moscow Region, 142279, Russian Federation</p></bio><email xlink:type="simple">info@obolensk.org</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru">ФБУН «Государственный научный центр прикладной микробиологии и биотехнологии»<country>Россия</country></aff><aff xml:lang="en">State Scientific Center for Applied Microbiology and Biotechnology<country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2020</year></pub-date><pub-date pub-type="epub"><day>19</day><month>10</month><year>2020</year></pub-date><volume>0</volume><issue>3</issue><fpage>62</fpage><lpage>69</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Карцева А.С., Калмантаева О.В., Силкина М.В., Комбарова Т.И., Павлов В.М., Мокриевич А.Н., Фирстова В.В., 2020</copyright-statement><copyright-year>2020</copyright-year><copyright-holder xml:lang="ru">Карцева А.С., Калмантаева О.В., Силкина М.В., Комбарова Т.И., Павлов В.М., Мокриевич А.Н., Фирстова В.В.</copyright-holder><copyright-holder xml:lang="en">Kartseva A.S., Kalmantaeva O.V., Silkina M.V., Kombarova T.I., Pavlov V.M., Mokrievich A.N., Firstova V.V.</copyright-holder><license 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://journal.microbe.ru/jour/article/view/1365">https://journal.microbe.ru/jour/article/view/1365</self-uri><abstract><p>Francisella tularensis является внутриклеточной бактерией, вызывающей туляремию. Прогресс в создании безопасной и эффективной вакцины для профилактики туляремии затруднен из-за недостатка знаний об иммунологических параметрах, отражающих защитный адаптивный иммунитет. Целью исследований являлась оценка влияния модификаций генома F. tularensis 15 НИИЭГ на иммуногенные и протективные свойства штаммов F. tularensis 15/23-1ΔrecA и F. tularensis 15/23-1/sodBΔrecA. Материалы и методы. Многопараметрическая проточная цитометрия и измерение секретируемых цитокинов использованы для характеристики реакций лимфоцитов селезенки мышей на рестимуляцию кислотонерастворимым комплексом F. tularensis в системе in vitro, также проведен анализ титров специфических антител к липополисахариду F. tularensis в сыворотке крови методом иммуноферментного анализа. Результаты и обсуждение. В работе показано, что иммунизация исследуемыми штаммами приводила к достоверному увеличению CD4+ и/или CD8+ Т‑ клеток, способных экспрессировать функциональные маркеры CD69, CD25 и/или CD28, а также к увеличению субпопуляции Т‑ хелперов, синтезирующих IFN-γ. В организме иммунных мышей формировался пул В‑ лимфоцитов, способных секретировать IFN-γ в ответ на их стимуляцию кислотонерастворимым комплексом. Иммунизация штаммом 15/23-1/sodBΔrecA обеспечивала 70 % защиту у мышей от интраназального заражения вирулентным штаммом F. tularensis SchuS4. Более выраженные протективные свойства связаны с активацией не только В-лимфоцитов и Т-хелперов, но также с одновременной активацией цитотоксических Т‑ лимфоцитов.</p></abstract><trans-abstract xml:lang="en"><p>Francisella tularensis is an intracellular bacterium that causes tularemia. Progress in creating a safe and effective vaccine for the prevention of tularemia is challenging due to a lack of knowledge about immunological parameters indicative of protective adaptive immunity. Objective of the research was to assess the effect of modifications of the F. tularensis 15 NIIEG genome on the immunogenic and protective properties of F. tularensis 15/23-1ΔrecA and F. tularensis 15/23-1/sodBΔrecA strains. Materials and methods. Multi-parameter flow cytometry and the measurement of secreted cytokines were used to characterize the responses of mouse spleen lymphocytes in response to re-stimulation of F. tularensis with acid-insoluble complex (AIC) in vitro. Also, the titers of specific antibodies to F. tularensis lipopolysaccharide in blood serum were analyzed by enzyme-linked immunosorbent assay. Results and discussion. It has been shown that immunization with the studied strains led to a significant increase in CD4+ and/or CD8+ T cells capable of expressing functional markers: CD69, CD25 and/or CD28; an increase in the subpopulation of T-helpers synthesizing IFN-γ. In the body of immune mice, a pool of B-lymphocytes was formed, capable of secreting IFN-γ in response to their stimulation with AIC. Immunization with the strain 15/23-1/sodBΔrecA provided 70% protection in mice from intranasal infection with a virulent strain of F. tularensis SchuS4. More pronounced protective properties were associated with the activation of not only B-lymphocytes and T-helpers, but also with the simultaneous activation of cytotoxic T-lymphocytes.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>туляремия</kwd><kwd>вакцина</kwd><kwd>Т-лимфоциты</kwd><kwd>цитокины</kwd><kwd>В-лимфоциты</kwd><kwd>протективность</kwd></kwd-group><kwd-group xml:lang="en"><kwd>tularemia</kwd><kwd>vaccine</kwd><kwd>T-lymphocytes</kwd><kwd>cytokines</kwd><kwd>B-lymphocytes</kwd><kwd>protectivity</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">Олсуфьев Н.Г. Таксономия, микробиология и лабораторная диагностика возбудителя туляремии. М.: Медицина; 1975. 192 с.</mixed-citation><mixed-citation xml:lang="en">Olsuf’ev N.G. [Taxonomy, Microbiology, and Laboratory Diagnostics of Tularemia Agent]. 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