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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">biopreparat</journal-id><journal-title-group><journal-title xml:lang="ru">БИОпрепараты. Профилактика, диагностика, лечение</journal-title><trans-title-group xml:lang="en"><trans-title>Biological Products. Prevention, Diagnosis, Treatment</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2221-996X</issn><issn pub-type="epub">2619-1156</issn><publisher><publisher-name>Scientific Centre for Expert Evaluation of Medicinal Products</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.30895/2221-996X-2025-565</article-id><article-id custom-type="elpub" pub-id-type="custom">biopreparat-565</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>ПРОБИОТИКИ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>PROBIOTICS</subject></subj-group></article-categories><title-group><article-title>Пробиотические свойства композиции индигенных штаммов Bifidobacterium bifidum ICIS-310 и Bifidobacterium longum ICIS-505 в условиях in vitro</article-title><trans-title-group xml:lang="en"><trans-title>Probiotic properties of an indigenous strain composition of Bifidobacterium bifidum ICIS-310 and Bifidobacterium longum ICIS-505 in vitro</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-6352-8879</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Перунова</surname><given-names>Н. Б.</given-names></name><name name-style="western" xml:lang="en"><surname>Perunova</surname><given-names>N. B.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Перунова Наталья Борисовна, д-р мед. наук, доц., проф. РАН</p><p>ул. Пионерская, д. 11, Оренбург, 460000; ул. Одесская, д. 54, Тюмень, 625023</p></bio><bio xml:lang="en"><p>Natalia B. Perunova, Dr. Sci. (Med.), Assoc. Prof., Prof. RAS</p><p>11 Pionerskaya St., Orenburg 460000; 54 Odesskaya St., Tyumen, 625023</p></bio><email xlink:type="simple">nbperunova@yandex.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/0000-0002-6039-5265</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Бухарин</surname><given-names>О. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Bukharin</surname><given-names>O. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Бухарин Олег Валерьевич, д-р мед. наук, проф., акад. РАН</p><p>ул. Пионерская, д. 11, Оренбург, 460000</p></bio><bio xml:lang="en"><p>Oleg V. Bukharin, Dr. Sci. (Med.), Prof., Acad. RAS</p><p>11 Pionerskaya St., Orenburg 460000</p></bio><email xlink:type="simple">ofrc@list.ru</email><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-4974-8947</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Иванова</surname><given-names>Е. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Ivanova</surname><given-names>E. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Иванова Елена Валерьевна, д-р мед. наук, доц.</p><p>ул. Пионерская, д. 11, Оренбург, 460000</p></bio><bio xml:lang="en"><p>Elena V. Ivanova, Dr. Sci. (Med.), Assoc. Prof.</p><p>11 Pionerskaya St., Orenburg 460000</p></bio><email xlink:type="simple">walerewna13@gmail.com</email><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-5020-2493</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Бекпергенова</surname><given-names>А. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Bekpergenova</surname><given-names>A. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Бекпергенова Анастасия Владимировна, канд. биол. наук</p><p>ул. Пионерская, д. 11, Оренбург, 460000</p></bio><bio xml:lang="en"><p>Anastasia V. Bekpergenova, Cand. Sci. (Biol.)</p><p>11 Pionerskaya St., Orenburg 460000</p></bio><email xlink:type="simple">nsavasteeva@gmail.com</email><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-5186-6865</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Бондаренко</surname><given-names>Т. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Bondarenko</surname><given-names>T. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Бондаренко Таисия Александровна, канд. биол. наук</p><p>ул. Пионерская, д. 11, Оренбург, 460000</p></bio><bio xml:lang="en"><p>Taisia A. Bondarenko, Cand. Sci. (Biol.)</p><p>11 Pionerskaya St., Orenburg 460000</p></bio><email xlink:type="simple">semenovih88@mail.ru</email><xref ref-type="aff" rid="aff-2"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Институт клеточного и внутриклеточного симбиоза Уральского отделения Российской академии наук — обособленное структурное подразделение федерального государственного бюджетного учреждения науки Оренбургского федерального исследовательского центра Уральского отделения Российской академии наук; Федеральное государственное бюджетное образовательное учреждение высшего образования «Тюменский государственный медицинский университет» Министерства здравоохранения Российской Федерации</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Institute for Cellular and Intracellular Symbiosis, Orenburg Federal Research Center, Ural Branch of the Russian Academy of Sciences; Tyumen State Medical University</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Институт клеточного и внутриклеточного симбиоза Уральского отделения Российской академии наук — обособленное структурное подразделение федерального государственного бюджетного учреждения науки Оренбургского федерального исследовательского центра Уральского отделения Российской академии наук</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Institute for Cellular and Intracellular Symbiosis, Orenburg Federal Research Center, Ural Branch of the Russian Academy of Sciences</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2025</year></pub-date><pub-date pub-type="epub"><day>25</day><month>06</month><year>2025</year></pub-date><volume>25</volume><issue>2</issue><fpage>203</fpage><lpage>213</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Перунова Н.Б., Бухарин О.В., Иванова Е.В., Бекпергенова А.В., Бондаренко Т.А., 2025</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="ru">Перунова Н.Б., Бухарин О.В., Иванова Е.В., Бекпергенова А.В., Бондаренко Т.А.</copyright-holder><copyright-holder xml:lang="en">Perunova N.B., Bukharin O.V., Ivanova E.V., Bekpergenova A.V., Bondarenko T.A.</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://www.biopreparations.ru/jour/article/view/565">https://www.biopreparations.ru/jour/article/view/565</self-uri><abstract><sec><title>ВВЕДЕНИЕ</title><p>ВВЕДЕНИЕ. Активный поиск пробиотических штаммов микроорганизмов, в том числе относящихся к индигенным штаммам бифидобактерий, является важной задачей при создании лечебно-профилактических пробиотических препаратов. При определении пробиотического потенциала кандидатных штаммов необходима их оценка по показателям жизнеспособности бактерий, чувствительности к антибиотикам, устойчивости к желудочному соку и желчи, лизоцимрезистентности и биопленкообразованию.</p></sec><sec><title>ЦЕЛЬ</title><p>ЦЕЛЬ. Характеристика композиции индигенных штаммов Biffdobacterium biffdum ICIS-310 и Biffdobacterium longum ICIS-505 в качестве потенциального пробиотического препарата.</p></sec><sec><title>МАТЕРИАЛЫ И МЕТОДЫ</title><p>МАТЕРИАЛЫ И МЕТОДЫ. Использованы штаммы B. biffdum ICIS-310 и B. longum ICIS-505. Оценивали чувствительность штаммов к антибиотикам, а также устойчивость к желудочному соку и желчи. Проводили исследование монокультур бифидобактерий B. biffdum ICIS-310 и B. longum ICIS-505 и их композиции по количеству жизнеспособных клеток при культивировании, антилизоцимной активности (лизоцимрезистентности), биопленкообразованию. При определении антагонистической активности в качестве тест-штаммов условно-патогенных и патогенных культур использовали Candida albicans ATCC 24433, Proteus mirabilis ATCC 29906, Staphylococcus aureus ATCC 29213, Escherichia coli ATCC 25922, Shigella flexneri ATCC 12022, Klebsiella pneumoniaе ICIS-278_PBV. Содержание уксусной кислоты в среде культивирования определяли методом газожидкостной хроматографии.</p></sec><sec><title>РЕЗУЛЬТАТЫ</title><p>РЕЗУЛЬТАТЫ. Отобранные по критериям численности, лизоцимрезистентности и биопленкообразования индигенные штаммы B. biffdum ICIS-310 и B. longum ICIS-505 не имели генов патогенности, обладали устойчивостью к ряду антимикробных препаратов (бензилпенициллин, стрептомицин и эритромицин) и сохраняли свою жизнеспособность в присутствии желчи в течение 2 ч и желудочного сока — 30 мин. Исследуемые культуры бифидобактерий обладали биосовместимостью: в композиции штаммов через 48 ч количество микробных клеток было выше, чем в монокультурах. При совместном культивировании штаммы B. biffdum ICIS-310 и B. longum ICIS-505 проявляли синергетический эффект, повышая уровень лизоцимрезистентности до 2,2±0,30 мкг/мл×ОП450, биопленкообразования до 0,89±0,20 ед. ОП630 и продукцию ацетата до 33,2 мМ/л. Композиция бифидобактерий обладала более выраженной антагонистической активностью по отношению к тест-штаммам бактерий и грибов (зоны угнетения роста тест-культур 30–36 мм) в сравнении с монокультурами (зоны угнетения роста тест-культур 18–24 мм).</p></sec><sec><title>ВЫВОДЫ</title><p>ВЫВОДЫ. Индигенные штаммы B. biffdum ICIS-310 и B. longum ICIS-505 устойчивы к антимикробным препаратам, желчи и желудочному соку. При совместном культивировании штаммов выявлен синергетический эффект в отношении усиления показателей лизоцимрезистентности, биопленкообразования и антагонистической активности. Исследованные штаммы бифидобактерий и их композиция перспективны с целью создания новых пробиотических препаратов. Оценка лизоцимрезистентности и биопленкообразования может быть рекомендована в качестве показателей адаптивного потенциала микробиоты при отборе и тестировании пробиотических штаммов.</p></sec></abstract><trans-abstract xml:lang="en"><sec><title>INTRODUCTION</title><p>INTRODUCTION. An active search for probiotic strains of microorganisms, particularly indigenous bifidobacteria, is crucial for the development of therapeutic and prophylactic probiotics. Evaluating the probiotic potential of candidate strains requires their assessment for bacterial viability, antibiotic sensitivity, gastrointestinal stress tolerance, lysozyme resistance, and biofilm formation capacity.</p></sec><sec><title>AIM</title><p>AIM. This study aimed to characterise a composition of indigenous Biffdobacterium strains, B. biffdum ICIS-310 and B. longum ICIS-505, as a potential probiotic product.</p></sec><sec><title>MATERIALS AND METHODS</title><p>MATERIALS AND METHODS. The study tested B. biffdum ICIS-310 and B. longum ICIS-505 for resistance to antibiotics, gastric acid, and bile. Mono- and co-cultures of B. biffdum ICIS-310 and B. longum ICIS-505 were tested for the number of viable cells during culture, antilysozyme activity (lysozyme resistance), and biofilm formation capacity. Antagonistic activity was tested against test strains of bacteria and fungi, including Candida albicans ATCC 24433, Proteus mirabilis ATCC 29906, Staphylococcus aureus ATCC 29213, Escherichia coli ATCC 25922, Shigella flexneri ATCC 12022, and Klebsiella pneumoniaе ICIS-278_PBV. The content of acetic acid in the culture medium was determined by gas–liquid chromatography.</p></sec><sec><title>RESULTS</title><p>RESULTS. The indigenous strains, B. biffdum ICIS-310 and B. longum ICIS-505, were selected according to the criteria of abundance, lysozyme resistance, and biofilm formation. These strains were found to lack pathogenicity genes, exhibit resistance to a number of antimicrobials (benzylpenicillin, streptomycin, and erythromycin), and remain viable in the presence of bile for 2 hours and in the presence of gastric acid for 30 minutes. The study demonstrated the biocompatibility of Biffdobacterium cultures, with the composition of B. biffdum ICIS-310 and B. longum ICIS-505 having a higher microbial cell count after 48 hours than monocultures. When co-cultured, B. biffdum ICIS-310 and B. longum ICIS-505 demonstrated a synergistic effect, resulting in increased lysozyme resistance (up to 2.2±0.30 μg/mL×OD450), biofilm formation (up to 0.89±0.20 OD630 units), and acetate production (up to 33.2 mM/L). The antagonistic activity against test strains was more pronounced in the co-culture than in the monocultures, with the respective growth inhibition zones of 30–36 mm and 18–24 mm.</p></sec><sec><title>CONCLUSIONS</title><p>CONCLUSIONS. Indigenous B. biffdum ICIS-310 and B. longum ICIS-505 have demonstrated resistance to antimicrobial agents, bile salts, and gastric acid. Co-culturing the strains has revealed a synergistic effect on their lysozyme resistance, biofilm formation capacity, and antagonistic activity. The strains of bifidobacteria and the composition thereof hold promise for the development of novel probiotics. The evaluation of lysozyme resistance and biofilm formation capacity, as indicators of the adaptive potential of the microbiota, may be recommended for the selection and testing of probiotic strains.</p></sec></trans-abstract><kwd-group xml:lang="ru"><kwd>индигенные штаммы бифидобактерий</kwd><kwd>Biffdobacterium biffdum</kwd><kwd>Biffdobacterium longum</kwd><kwd>пробиотик</kwd><kwd>пробиотические свойства</kwd><kwd>лизоцимрезистентность</kwd><kwd>биопленкообразование</kwd><kwd>антибиотикорезистентность</kwd><kwd>устойчивость к желудочному соку</kwd><kwd>устойчивость к желчи</kwd><kwd>антагонистическая активность</kwd></kwd-group><kwd-group xml:lang="en"><kwd>indigenous Biffdobacterium strains</kwd><kwd>Biffdobacterium biffdum</kwd><kwd>Biffdobacterium longum</kwd><kwd>probiotics</kwd><kwd>probiotic properties</kwd><kwd>lysozyme resistance</kwd><kwd>biofilm formation</kwd><kwd>antimicrobial resistance</kwd><kwd>gastric acid resistance</kwd><kwd>bile resistance</kwd><kwd>antagonistic activity</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Работа выполнена в рамках НИР по теме государственного задания Института клеточного и внутриклеточного симбиоза УрО РАН «Исследование симбиотических систем про- и эукариот в биологии и медицине» № 122020100106-5.</funding-statement><funding-statement xml:lang="en">This study was conducted by the Institute for Cellular and Intracellular Symbiosis, Ural Branch of the Russian Academy of Sciences, as part of the research and development work under State Assignment No. 122020100106-5 Study of symbiotic systems of pro- and eukaryotes in biology and medicine</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">Бухарин ОВ, Перунова НБ, Иванова ЕВ. 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