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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="brief-report" dtd-version="1.2" xml:lang="en"><front><journal-meta><journal-id journal-id-type="publisher-id">Russian Journal of Infection and Immunity</journal-id><journal-title-group><journal-title xml:lang="en">Russian Journal of Infection and Immunity</journal-title><trans-title-group xml:lang="ru"><trans-title>Инфекция и иммунитет</trans-title></trans-title-group></journal-title-group><issn publication-format="print">2220-7619</issn><issn publication-format="electronic">2313-7398</issn><publisher><publisher-name xml:lang="en">SPb RAACI</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">9636</article-id><article-id pub-id-type="doi">10.15789/2220-7619-OSI-9636</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>SHORT COMMUNICATIONS</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>КРАТКИЕ СООБЩЕНИЯ</subject></subj-group><subj-group subj-group-type="article-type"><subject>Short Communication</subject></subj-group></article-categories><title-group><article-title xml:lang="en">Oxidative stress induced by the human microbiota yeast component as a micromycetes pathogenicity factor</article-title><trans-title-group xml:lang="ru"><trans-title>Индукция оксидативного стресса дрожжевым компонентом микробиоты человека как фактор патогенности микромицетов</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Prokopyev</surname><given-names>V. V.</given-names></name><name xml:lang="ru"><surname>Прокопьев</surname><given-names>В. В.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>PhD (Biology), Associate Professor, Department of Epidemiology, Microbiology and Virology, Bacteriologist</p></bio><bio xml:lang="ru"><p>к.б.н., доцент кафедры эпидемиологии, микробиологии и вирусологии, врач-бактериолог</p></bio><email>prokopievvv@mail.ru</email><xref ref-type="aff" rid="aff1"/><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Kuklina</surname><given-names>N. V.</given-names></name><name xml:lang="ru"><surname>Куклина</surname><given-names>Н. В.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>PhD (Medicine), Associate Professor, Department of Epidemiology, Microbiology and Virology</p></bio><bio xml:lang="ru"><p>к.м.н., доцент кафедры эпидемиологии, микробиологии и вирусологии</p></bio><email>prokopievvv@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Mazko</surname><given-names>O. N.</given-names></name><name xml:lang="ru"><surname>Мазко</surname><given-names>О. Н.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>PhD (Biology), Associate Professor, Department of Pharmacology named after professor V.M. Bryukhanov</p></bio><bio xml:lang="ru"><p>к.б.н., доцент кафедры фармакологии им. профессора В.М. Брюханова</p></bio><email>prokopievvv@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Makarova</surname><given-names>O. G.</given-names></name><name xml:lang="ru"><surname>Макарова</surname><given-names>О. Г.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>PhD (Biology), Associate Professor, Department of Pharmacology named after professor V.M. Bryukhanov</p></bio><bio xml:lang="ru"><p>к.б.н., доцент кафедры фармакологии им. профессора В.М. Брюханова</p></bio><email>prokopievvv@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Altai State Medical University</institution></aff><aff><institution xml:lang="ru">ФГБОУ ВО Алтайский государственный медицинский университет Минздрава России</institution></aff></aff-alternatives><aff-alternatives id="aff2"><aff><institution xml:lang="en">Clinical Diagnostic Laboratory “Zdorovie”</institution></aff><aff><institution xml:lang="ru">ООО Клинико-диагностическая лаборатория «Здоровье»</institution></aff></aff-alternatives><pub-date date-type="preprint" iso-8601-date="2023-12-13" publication-format="electronic"><day>13</day><month>12</month><year>2023</year></pub-date><pub-date date-type="pub" iso-8601-date="2024-02-28" publication-format="electronic"><day>28</day><month>02</month><year>2024</year></pub-date><volume>14</volume><issue>1</issue><issue-title xml:lang="en"/><issue-title xml:lang="ru"/><fpage>175</fpage><lpage>180</lpage><history><date date-type="received" iso-8601-date="2023-05-03"><day>03</day><month>05</month><year>2023</year></date><date date-type="accepted" iso-8601-date="2023-12-07"><day>07</day><month>12</month><year>2023</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2024, Prokopyev V.V., Kuklina N.V., Mazko O.N., Makarova O.G.</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2024, Прокопьев В.В., Куклина Н.В., Мазко О.Н., Макарова О.Г.</copyright-statement><copyright-year>2024</copyright-year><copyright-holder xml:lang="en">Prokopyev V.V., Kuklina N.V., Mazko O.N., Makarova O.G.</copyright-holder><copyright-holder xml:lang="ru">Прокопьев В.В., Куклина Н.В., Мазко О.Н., Макарова О.Г.</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://iimmun.ru/iimm/article/view/9636">https://iimmun.ru/iimm/article/view/9636</self-uri><abstract xml:lang="en"><p>The introduction of MALDI-ToF mass spectrometry into routine microbiological diagnostics has led to a widely extended list of identified microorganisms. This phenomenon also affected mycological studies. Rare basidiomycetes and ascomycetes began to be detected in various types of pathological material. It is often difficult to assess a role of isolated micromycetes in the pathogenesis of a certain disease. In addition to generally admitted pathogenicity factors, such as aggression enzymes, adhesive activity, and toxin formation, induction or inhibition of reactive oxygen species can play a prominent role in pathogenesis of infectious diseases. In our study, we evaluated the total prooxidant and total antioxidant activity of cultivated ascomycete and basidiomycete yeasts from the human intestinal mycobiome. The strains of micromycetes assessed here were obtained from a fecal culture study from patients with gastrointestinal tract pathology and healthy people undergoing a routine medical examination. Identification was carried out analyzing morphological, cultural, biochemical properties and confirmed by mass spectrometry. The total prooxidant and antioxidant activity was assessed by the induced or inhibited malondialdehyde formation during Tween-80 oxidation. It was found that the level of total prooxidant activity in <italic>Rhodotorula mucilaginosa</italic>, <italic>Geotrichum candidum</italic>, <italic>Candida albicans</italic>, <italic>Pichia kudriavzevii</italic> significantly exceeds the level of total antioxidant activity, and the <italic>Pichia kudriavzevii</italic> prooxidase activity was more than twice as high as in other studied micromycetes. The revealed ability of some fungi to induce oxidase stress can be considered as one of significant pathogenicity factors of microorganisms that cause pathomorphological changes in human intestinal tissues.</p></abstract><trans-abstract xml:lang="ru"><p>Введение в рутинную микробиологическую диагностику MALDI-ToF масс-спектрометрии привело к существенному расширению списка идентифицированных микроорганизмов. Данное явление затронуло и микологические исследования. В различных типах патологического материала стали выявляться редкие базидиомицеты и аскомицеты. Зачастую сложно оценить роль выделенных микромицетов в патогенезе того или иного заболевания. Кроме общепризнанных факторов патогенности, таких как ферменты агрессии, адгезивная активность и токсинообразование, существенную роль в патогенезе инфекционных заболеваний могут играть индукция или ингибирование активных форм кислорода. В нашем исследовании мы оценили общую прооксидантную и общую антиоксидазную активность культивируемых аскомицетных и базидиомицетных дрожжей микобиома кишечника человека. Штаммы микромицетов, исследованные в данной работе, были получены при культуральном исследовании кала пациентов с патологией желудочно-кишечного тракта и от здоровых людей, проходящих плановый медицинский осмотр. Идентификация проведена на основании морфологических, культуральных, биохимических свойств и подтверждена при помощи масс-спектрометрии. Суммарная прооксидантная и антиоксидантная активность оценивалась по индукции или ингибированию образования малонового диальдегида при окислении Твин-80. Было установлено, что уровень общей прооксидантной активности у <italic>Rhodotorula mucilaginosa</italic>, <italic>Geotrichum candidum</italic>, <italic>Candida albicans</italic>, <italic>Pichia kudriavzevii</italic> статистически достоверно превышает уровень общей антиоксидазной активности, причем прооксидазная активность <italic>Pichia kudriavzevii</italic> была более чем в 2 раза выше, чем у других исследованных микромицетов. Выявленная способность некоторых грибов индуцировать оксидазный стресс можно рассматривать как один из значимых факторов патогенности микроорганизмов, вызывающих патоморфологические изменения тканей кишечника человека.</p></trans-abstract><kwd-group xml:lang="en"><kwd>oxidative stress</kwd><kwd>yeast</kwd><kwd>pro-oxidant activity</kwd><kwd>antioxidant activity</kwd><kwd>intestinal mycobiota</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>оксидативный стресс</kwd><kwd>аскомицетные дрожжи</kwd><kwd>базидиомицетные дрожжи</kwd><kwd>прооксидантная активность</kwd><kwd>антиоксидантная активность</kwd><kwd>микобиота кишечника</kwd></kwd-group><funding-group/></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Патент № 2146053 Российская Федерация, МПК G01N 33/53(2006.01), G01N 33/49(2006.01), G01N 33/84(2006.01). 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