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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">foodmeta</journal-id><journal-title-group><journal-title xml:lang="ru">FOOD METAENGINEERING</journal-title><trans-title-group xml:lang="en"><trans-title>FOOD METAENGINEERING</trans-title></trans-title-group></journal-title-group><issn pub-type="epub">2949-6497</issn><publisher><publisher-name>All-Russian Dairy Research Institute</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.37442/fme.2023.3.28</article-id><article-id custom-type="elpub" pub-id-type="custom">foodmeta-28</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>Оригинальное эмпирическое исследование</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>Original Empirical Research</subject></subj-group></article-categories><title-group><article-title>Характеристика метаболитного комплекса, продуцируемого L.reuteri LR1</article-title><trans-title-group xml:lang="en"><trans-title>Characteristics of the metabolite complex produced L.reuteri LR1</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-5360-8955</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Бегунова</surname><given-names>Анна Васильевна</given-names></name><name name-style="western" xml:lang="en"><surname>Begunova</surname><given-names>Anna Vasilevna</given-names></name></name-alternatives><bio xml:lang="ru"><p>Центральная лаборатория микробиологии ФГАНУ "ВНИМИ", научный сотрудник, кандидат технических наук</p></bio><bio xml:lang="en"><p>Central Laboratory of Microbiology, Researcher, Candidate of Technical Sciences</p><p> </p></bio><email xlink:type="simple">abegunova@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/0000-0002-1522-3798</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Жижин</surname><given-names>Николай Анатольевич</given-names></name><name name-style="western" xml:lang="en"><surname>Zhizhin</surname><given-names>Nikolay Anatolevich</given-names></name></name-alternatives><bio xml:lang="ru"><p>научный сотрудник лаборатории технохимического контроля, кандидат технических наук</p><sec><title> </title></sec></bio><bio xml:lang="en"><p>Laboratory of Technochemical Control, Researcher, Candidate of Technical Sciences</p></bio><email xlink:type="simple">n_zhizhin@vnimi.org</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Всероссийский научно-исследовательский институт молочной промышленности (ФГАНУ «ВНИМИ»)</institution><country>Россия</country></aff><aff xml:lang="en"><institution>All-Russian Dairy Research Institute</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2023</year></pub-date><pub-date pub-type="epub"><day>15</day><month>12</month><year>2023</year></pub-date><volume>1</volume><issue>3</issue><fpage>11</fpage><lpage>20</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Бегунова А.В., Жижин Н.А., 2023</copyright-statement><copyright-year>2023</copyright-year><copyright-holder xml:lang="ru">Бегунова А.В., Жижин Н.А.</copyright-holder><copyright-holder xml:lang="en">Begunova A.V., Zhizhin N.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.fme-journal.org/jour/article/view/28">https://www.fme-journal.org/jour/article/view/28</self-uri><abstract><sec><title>Введение</title><p>Введение: Молочнокислые микроорганизмы обладают ценными биотехнологическими и пробиотическими свойствами. Пробиотические свойства часто опосредованы биологически активными метаболитами, продуцируемыми этими микроорганизмами. Способности молочнокислых микроорганизмов к продуцированию биологически активных соединений в последние годы уделяется особое внимание, так как определено их положительное влияние на организм человека. Однако существует огромный пробел в знаниях, касающихся состава метаболитных комплексов, который требует изучения, чтобы обеспечить безопасность их применения.</p></sec><sec><title>Цель</title><p>Цель: Исследование метаболитного комплекса, продуцируемого L. reuteri LR1, полученного при культивировании штамма в питательной среде MRS - бульон при температуре (37±1)ºС в течение 24 ч.</p></sec><sec><title>Материалы и методы</title><p>Материалы и методы: Объектом исследований являлся бесклеточный супернатант (метаболитный комплекс), полученный при культивировании штамма Lactobacillus reuteri LR1 из коллекции ФГАНУ «ВНИМИ». Антимикробную активность МК L. reuteri LR1 по отношению к E. coli АТСС 25922, S. aureus АТСС 6538, S. typhimurium АТСС 14028 определяли методом диффузии в агар. Антиоксидантную активность образцов определяли флуоресцентным методом ORAC. Содержание органических и аминокислот в МК проводили методом капиллярного электрофореза. Идентификацию вторичных метаболитов, присутствующих в МК проводили методом газовой хромато-масс-спектрометрии (ГХ-МС).</p></sec><sec><title>Результаты</title><p>Результаты: Определена биологическая активность МК, продуцируемого L. reuteri LR1. Охарактеризован состав бесклеточного метаболитного комплекса, секретируемого L.rеuteri LR1 при культивировании в питательной среде MRS-бульон при температуре 37°С в течение 24 ч. Подтверждено наличие аминокислот и органических кислот в МК и определено их содержание. Кроме того, определены вторичные метаболиты, присутствующие в МК, некоторые из них обладают подтверждённой биологической активностью.</p></sec><sec><title>Выводы</title><p>Выводы: Полученные результаты могут быть полезны для прогнозирования пробиотического потенциала МК, однако необходимо определить вероятную корреляцию между составом МК и его полезными свойствами, что позволит определить новые возможности применения МК, продуцируемых пробиотическими микроорганизмами.</p></sec></abstract><trans-abstract xml:lang="en"><sec><title>Introduction</title><p>Introduction: Lactic acid microorganisms have valuable biotechnological and probiotic properties. Probiotic properties are often mediated by biologically active metabolites produced by these microorganisms. The ability of lactic acid microorganisms to produce biologically active compounds has received special attention in recent years, as their positive effect on the human body has been determined. However, there is a huge knowledge gap regarding the composition of metabolite complexes that requires study to ensure their safe use.</p></sec><sec><title>Purpose</title><p>Purpose: The current study of the metabolite complex produced by L. reuteri LR1, obtained by cultivating the strain in the MRS broth nutrient medium at a temperature of (37±1)ºС for 24 hours.</p></sec><sec><title>Materials and Methods</title><p>Materials and Methods: The object of research was a cell-free supernatant (metabolite complex) obtained by cultivating the Lactobacillus reuteri LR1 strain from the collection of the Federal State Scientific Institution “VNIMI”. The antimicrobial activity of MK L. reuteri LR1 against E. coli ATCC 25922, S. aureus ATCC 6538, S. typhimurium ATCC 14028 was determined by the agar diffusion method. The antioxidant activity of the samples was determined using the ORAC fluorescence method. The content of organic and amino acids in LA was determined by capillary electrophoresis. Identification of secondary metabolites present in MK was carried out using gas chromatography-mass spectrometry (GC-MS).</p></sec><sec><title>Results</title><p>Results: The biological activity of MK produced by L. reuteri LR1 was determined. The composition of the cell-free metabolite complex secreted by L.reuteri LR1 during cultivation in the MRS broth nutrient medium at a temperature of 37°C for 24 hours was characterized. The presence of amino acids and organic acids in LA was confirmed and their content was determined. In addition, secondary metabolites present in MK have been identified, some of them have confirmed biological activity.</p></sec><sec><title>Conclusion</title><p>Conclusion: The results obtained may be useful for predicting the probiotic potential of MK, however, it is necessary to determine the likely correlation between the composition of MK and its beneficial properties, which will allow us to identify new possibilities for the use of MK produced by probiotic microorganisms.</p></sec></trans-abstract><kwd-group xml:lang="ru"><kwd>метаболитный комплекс</kwd><kwd>L. reuteri</kwd><kwd>биологическая активность</kwd></kwd-group><kwd-group xml:lang="en"><kwd>metabolite complex</kwd><kwd>L. reuteri</kwd><kwd>biological activity</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">Бегунова, А. В., Жижин Н. А. 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