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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">medlit</journal-id><journal-title-group><journal-title xml:lang="ru">Гигиена и санитария</journal-title><trans-title-group xml:lang="en"><trans-title>Hygiene and Sanitation</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">0016-9900</issn><issn pub-type="epub">2412-0650</issn><publisher><publisher-name>Federal Scientific Center of Hygiene named after F.F. Erisman</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.47470/0016-9900-2022-101-5-562-566</article-id><article-id custom-type="elpub" pub-id-type="custom">medlit-2277</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>МЕТОДЫ ГИГИЕНИЧЕСКИХ ИССЛЕДОВАНИЙ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>METHODS OF HYGIENIC AND EXPERIMENTAL INVESTIGATIONS</subject></subj-group></article-categories><title-group><article-title>Опыт использования метода времяпролётной масс-спектрометрии для идентификации плесневых грибов</article-title><trans-title-group xml:lang="en"><trans-title>MALDI-TOF MS application for identification of filamentous fungi</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-3152-4862</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Курбатова</surname><given-names>И. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Kurbatova</surname><given-names>Irina V.</given-names></name></name-alternatives><email xlink:type="simple">noemail@neicon.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/0000-0003-3554-7690</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Ракитина</surname><given-names>Д. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Rakitina</surname><given-names>Darya V.</given-names></name></name-alternatives><email xlink:type="simple">noemail@neicon.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/0000-0002-6628-4689</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Кравченко</surname><given-names>Е. С.</given-names></name><name name-style="western" xml:lang="en"><surname>Kravchenko</surname><given-names>Ekaterina S.</given-names></name></name-alternatives><email xlink:type="simple">noemail@neicon.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/0000-0002-6295-661X</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Мания</surname><given-names>Тамари Резоевна</given-names></name><name name-style="western" xml:lang="en"><surname>Maniya</surname><given-names>Tamari R.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Науч. сотр. лаб. микробиологии и паразитологии ФГБУ «ЦСП» ФМБА России 119121, Москва. </p><p>e-mail: TManiya@cspmz.ru</p></bio><bio xml:lang="en"><p>Researcher of Microbiology and Parasitology laboratory of the Centre for Strategic Planning and Management of Biomedical Health Risks” of the Federal Medical Biological Agency, Moscow, 119121, Russia Federation.</p><p>e-mail: TManiya@cspmz.ru</p></bio><email xlink:type="simple">tmaniya@cspmz.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/0000-0002-5282-3856</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Асланова</surname><given-names>М. М.</given-names></name><name name-style="western" xml:lang="en"><surname>Aslanova</surname><given-names>Mariya M.</given-names></name></name-alternatives><email xlink:type="simple">noemail@neicon.ru</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>Юдин</surname><given-names>С. М.</given-names></name><name name-style="western" xml:lang="en"><surname>Yudin</surname><given-names>Sergey M.</given-names></name></name-alternatives><email xlink:type="simple">noemail@neicon.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>ФГБУ «Центр стратегического планирования и управление медико-биологическими рисками здоровью» Федерального медико-биологического агентства</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Centre for Strategic Planning and Management of Biomedical Health Risks of the Federal Medical Biological Agency</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2022</year></pub-date><pub-date pub-type="epub"><day>07</day><month>06</month><year>2022</year></pub-date><volume>101</volume><issue>5</issue><fpage>562</fpage><lpage>566</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Курбатова И.В., Ракитина Д.В., Кравченко Е.С., Мания Т.Р., Асланова М.М., Юдин С.М., 2022</copyright-statement><copyright-year>2022</copyright-year><copyright-holder xml:lang="ru">Курбатова И.В., Ракитина Д.В., Кравченко Е.С., Мания Т.Р., Асланова М.М., Юдин С.М.</copyright-holder><copyright-holder xml:lang="en">Kurbatova I.V., Rakitina D.V., Kravchenko E.S., Maniya T.R., Aslanova M.M., Yudin S.M.</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.rjhas.ru/jour/article/view/2277">https://www.rjhas.ru/jour/article/view/2277</self-uri><abstract><sec><title>Введение</title><p>Введение. Метод матрично-ассоциированной лазерной масс-спектрометрии широко применяется в микробиологии в силу точности и быстроты получения результатов. Однако применение этого метода для плесневых грибов представляет ряд трудностей и не всегда эффективно.</p><p>Цель и задачи исследования — определить целесообразность практического применения удлинённого протокола с культивированием в жидкой среде и предварительной экстракцией белков в рутинной идентификации плесневых грибов, выделенных из окружающей среды.</p></sec><sec><title>Материалы и методы</title><p>Материалы и методы. Проводили анализ музейной коллекции плесневых грибов ФГБУ «ЦСП» ФМБА России методом MALDI-TOF-масс-спектрометрии для видовой идентификации микроорганизмов с помощью системы идентификации Biotyper (Bruker) с предварительным культивированием в жидкой среде и белковой экстракцией муравьиной кислотой и ацетонитрилом по удлинённому оптимизированному протоколу.</p></sec><sec><title>Результаты</title><p>Результаты. Проанализировано 137 образцов из коллекции лаборатории микробиологии и паразитологии. Качественные спектры получены для 71,5% изолятов. Идентификация по базе MBT Filamentous Fungi Library с достоверным скором (&gt; 1,7) получена для 55% образцов (26% со скором &gt; 2). Проанализированные образцы включали в себя представителей 19 семейств и 27 родов, 16% образцов демонстрировали спектры высокого качества, но не идентифицировались по базе MBT Filamentous Fungi Library (Bruker).</p></sec><sec><title>Ограничения исследования</title><p>Ограничения исследования: при изучении возможности использования метода времяпролётной масс-спектрометрии для идентификации плесневых грибов был произведён анализ 137 изолятов плесневых грибов из окружающей среды, что представляет собой достаточную референтную выборку. Проанализированные образцы включали в себя представителей 19 семейств и 27 родов, что позволяет применить полученные выводы по крайней мере к этим представителям мицелиальных грибов. В рамках данного исследования не удалось идентифицировать 22 образца со спектрами высокого качества, поэтому предметом дальнейших исследований будет их идентификация молекулярно-генетическими методами, выявление подобных образцов и создание из них новой собственной базы спектров для MALDI-TOF-биотипирования. Предстоит также расширить перечень изучаемых семейств.</p></sec><sec><title>Заключение</title><p>Заключение. Для эффективной идентификация плесневых грибов с помощью масс-спектрометрических методов целесообразно применять культивирование чистой культуры в жидкой среде, оптимизированный протокол пробоподготовки и создание собственной внутрилабораторной базы данных спектров.</p></sec><sec><title>Участие авторов</title><p>Участие авторов: Курбатова И.В. — концепция и дизайн исследования, сбор материала и микроскопическая идентификация, обработка данных, статистическая обработка, написание текста; редактирование;Ракитина Д.В. — концепция и дизайн исследования, сбор материала и обработка данных, идентификация методом MALDI-TOF, статистическая обработка, написание текста, редактирование;Кравченко Е.С. — культивирование образцов;Мания Т.Р. — написание текста, редактирование;Асланова М.М. — концепция и дизайн исследования, редактирование;Юдин С.М. — редактирование.Все соавторы — утверждение окончательного варианта статьи, ответственность за целостность всех частей статьи.</p></sec><sec><title>Конфликт интересов</title><p>Конфликт интересов. Авторы декларируют отсутствие явных и потенциальных конфликтов интересов в связи с публикацией данной статьи.</p></sec><sec><title>Финансирование</title><p>Финансирование. Исследование проводилось при поддержке Государственного задания «Разработка унифицированных методов, включающих отбор проб, для осуществления определения микробиологического и паразитологического загрязнения сточных вод» (шифр «Сточные воды») № АААА-А21-121011190012-3.</p></sec><sec><title>Поступила</title><p>Поступила: 05.03.2022 / Принята к печати: 12.04.2022 / Опубликована: 31.05.2022</p></sec></abstract><trans-abstract xml:lang="en"><sec><title>Introduction</title><p>Introduction. MALDI-TOF identification method is widely used in microbiology due to its accuracy and rapid results achievement. However, applying this method to mold fungi faces some difficulties and is not always effective.</p><p>Purpose of the study was to evaluate the profits of using the long cultivation and protein extraction protocol in routine identification of mold fungi isolates from environment.</p></sec><sec><title>Materials and methods</title><p>Materials and methods. The analysis of molds museum collection from Centre for Strategic Planning of FMBA of Russia was performed by MALDI-TOF mass-spectrometry Biotyper (Bruker Daltonics) with cultivation in liquid media and long optimized protein extraction protocol with acetonitrile and formic acid.</p></sec><sec><title>Results</title><p>Results. One hundred thirty seven isolates were analyzed. Quality spectra were achieved for 71.5% of samples. Identification with MBT Filamentous Fungi Library database with the high confidence score (&gt; 1.7) was achieved for 55% of isolates (26% with score &gt; 2). Samples analyzed included members of nineteen families and 27 genera. 16% of samples were not identified despite producing high-quality spectra.</p></sec><sec><title>Limitations</title><p>Limitations. When studying the possibility of using the time-of-flight mass spectrometry method to identify mold fungi, a sample of 137 isolates of mold fungi from the environment was analyzed, which is a sufficient reference sample. The analyzed samples included representatives of 19 families and 27 genera, which makes it possible to apply the findings to at least these representatives of micellar fungi. In this study 22 samples with good quality spectra, were not identified with MBT Filamentous Fungi Library database. In the future studies, these samples, along with other samples like that, will be identified by genetic molecular methods and added to the new home-made database for filamentous fungi MALDI-TOF identification.</p></sec><sec><title>Conclusion</title><p>Conclusion. Effective identification of filamentous fungi by mass-spectrometry methods requires pure culture achieved from liquid media, long optimized protocol of protein extraction and building an in-house database of spectra not presented in Bruker database.</p></sec><sec><title>Contribution</title><p>Contribution: Kurbatova I.V. — research concept and design, material collection and microscopic identification data processing, statistical processing, text writing, editing;Rakitina D.V. — research concept and design, material collection and data processing, identification by MALDI-TOF statistical processing, text writing, editing;Kravchenko E.S. — cultivation of samples;Maniya T.R. — writing text, editing;Aslanova M.M. — concept and design of the study, editing;Yudin S.M. — editing.All authors are responsible for the integrity of all parts of the manuscript and approval of the manuscript final version.</p></sec><sec><title>Conflict of interest</title><p>Conflict of interest. The authors declare no conflict of interest.</p></sec><sec><title>Acknowledgments</title><p>Acknowledgments. The research was carried out with the support of the State Assignment Reg. No. АААА-А21-121011190012-3, theme “Development of unified methods, including sampling, for the determination of microbiological and parasitological contamination of wastewater” (code “Wastewater”).</p></sec><sec><title>Received</title><p>Received: March 5, 2022 / Accepted: April 12, 2022 / Published: May 31, 2022</p></sec></trans-abstract><kwd-group xml:lang="ru"><kwd>MALDI-TOF MS</kwd><kwd>плесневые грибы</kwd></kwd-group><kwd-group xml:lang="en"><kwd>MALDI-TOF MS</kwd><kwd>mold fingi</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">Patel R. MALDI-TOF mass spectrometry: transformative proteomics for clinical microbiology. Clin. 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