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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="other" dtd-version="1.2" xml:lang="en"><front><journal-meta><journal-id journal-id-type="publisher-id">Russian Journal of Genetics</journal-id><journal-title-group><journal-title xml:lang="en">Russian Journal of Genetics</journal-title><trans-title-group xml:lang="ru"><trans-title>Генетика</trans-title></trans-title-group></journal-title-group><issn publication-format="print">0016-6758</issn><issn publication-format="electronic">3034-5103</issn><publisher><publisher-name xml:lang="en">The Russian Academy of Sciences</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">666818</article-id><article-id pub-id-type="doi">10.31857/S0016675823080106</article-id><article-id pub-id-type="edn">XTXIFD</article-id><article-categories><subj-group subj-group-type="toc-heading"><subject>ГЕНЕТИКА МИКРООРГАНИЗМОВ</subject></subj-group><subj-group subj-group-type="article-type"><subject></subject></subj-group></article-categories><title-group><article-title xml:lang="en">Transcriptomic Analysis of the <italic>Levilactobacillus brevis</italic> 47f Strain under Oxidative Stress</article-title><trans-title-group xml:lang="ru"><trans-title>Транскриптомный анализ штамма <italic>Levilactobacillus brevis</italic> 47f в условиях окислительного стресса</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Pouektova</surname><given-names>E. U.</given-names></name><name xml:lang="ru"><surname>Полуэктова</surname><given-names>Е. У.</given-names></name></name-alternatives><email>epolu@vigg.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Averina</surname><given-names>O. V.</given-names></name><name xml:lang="ru"><surname>Аверина</surname><given-names>О. В.</given-names></name></name-alternatives><email>epolu@vigg.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Kovtun</surname><given-names>A. S.</given-names></name><name xml:lang="ru"><surname>Ковтун</surname><given-names>А. С.</given-names></name></name-alternatives><email>epolu@vigg.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Danilenko</surname><given-names>V. N.</given-names></name><name xml:lang="ru"><surname>Даниленко</surname><given-names>В. Н.</given-names></name></name-alternatives><email>epolu@vigg.ru</email><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Vavilov Institute of General Genetics, Russian Academy of Sciences</institution></aff><aff><institution xml:lang="ru">Институт общей генетики им. Н.И. Вавилова Российской академии наук</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2023-08-01" publication-format="electronic"><day>01</day><month>08</month><year>2023</year></pub-date><volume>59</volume><issue>8</issue><fpage>888</fpage><lpage>897</lpage><history><date date-type="received" iso-8601-date="2025-02-26"><day>26</day><month>02</month><year>2025</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2023, Е.У. Полуэктова, О.В. Аверина, А.С. Ковтун, В.Н. Даниленко</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2023, Е.У. Полуэктова, О.В. Аверина, А.С. Ковтун, В.Н. Даниленко</copyright-statement><copyright-year>2023</copyright-year><copyright-holder xml:lang="en">Е.У. Полуэктова, О.В. Аверина, А.С. Ковтун, В.Н. Даниленко</copyright-holder><copyright-holder xml:lang="ru">Е.У. Полуэктова, О.В. Аверина, А.С. Ковтун, В.Н. Даниленко</copyright-holder></permissions><self-uri xlink:href="https://transsyst.ru/0016-6758/article/view/666818">https://transsyst.ru/0016-6758/article/view/666818</self-uri><abstract xml:lang="en"><p id="idm45181325556272"><italic>Levilactobacillus brevis</italic> 47f is a heterofermentative aerotolerant lactic acid bacterium isolated from the microbiota of the gastrointestinal tract of a healthy person. Previously, the strain showed anti-inflammatory properties and protects the murine intestine from enteropathy induced by 5-fluorouracil as part of preclinical studies. At the same time, the molecular mechanisms that account for the properties of the strain and its response to the action of reactive oxygen species, remain unexplored. The aim of this work was to study the response of the strain to the action of oxidizing agents – hydrogen peroxide and oxygen – using the method of transcriptional RNAseq analysis. Both oxidants exhibited a strong effect on the strain, increasing or decreasing the expression of several hundred genes – both general and specific for each oxidant. The characteristics of proteins whose expression was increased the most (DE ≥ 5) are provided. The genes activated under the action of both oxidants encode proteins related to stress, antioxidant activity, protein and nucleotide repair, cell wall, carbohydrate transport and metabolism, and catabolic energy storage pathways. Peroxide mainly activated the transcription of defense proteins, namely, stress response and molecular chaperones, antioxidant activity, DNA repair, and proteins involved in the formation of the cell wall. Under aerobic conditions, the genes that encode proteins involved in energy conversion (the use of fatty acids, nucleosides, fructose in addition to glucose as an energy source; proteins of the phosphoketolase pathway) and the import of peptides, amino acids, and sugars, were activated to a large extent. The data obtained in this work will be used by us to conduct an integrated analysis of transcriptomic, proteomic, and metabolomic data derived from this strain. This will make a significant contribution to the creation of a pharmacobiotic based on <italic>L. brevis</italic> 47f for the treatment of various inflammatory diseases.</p></abstract><trans-abstract xml:lang="ru"><p id="idm45181325555920"><italic>Levilactobacillus brevis</italic> 47f – гетероферментативная аэротолерантная молочнокислая бактерия, выделенная из микробиоты желудочно-кишечного тракта здорового человека. В комплексе доклинических исследований штамм проявил противовоспалительные свойства в отношении мукозита слизистой оболочки тонкого и толстого кишечника, индуцированного 5-фторурацилом. Вместе с тем молекулярные механизмы, определяющие свойства штамма и, в частности, его реакцию на воздействие активных форм кислорода, остаются неизученными. Задачей данной работы было исследовать реакцию штамма на действие окислителей – перекиси водорода и кислорода – методом транскрипционного RNAseq-анализа. Оба окислителя оказали сильное действие на штамм, увеличивая или снижая экспрессию нескольких сот генов – как общих, так и специфических для каждого оксиданта. Приведена характеристика белков с наиболее увеличенной экспрессией (ДЭ ≥ 5). Гены, активизирующиеся при действии обоих оксидантов, кодируют белки стресса, антиоксидантной защиты, репарации белков и нуклеотидов, клеточной стенки, транспорта и метаболизма углеводов, катаболических путей запасания энергии. При действии перекиси активизируется транскрипция в основном белков защиты: стрессового ответа и молекулярных шаперонов, антиоксидантной активности, репарации ДНК, а также белков, участвующих в формировании клеточной стенки. В аэробных условиях в значительной степени активизируются гены, определяющие белки преобразования энергии (использование в качестве источника энергии, помимо глюкозы, фруктозы, жирных кислот, нуклеозидов; белки фосфокетолазного пути) и импорта пептидов, аминокислот, сахаров. Полученные в настоящей работе результаты будут использованы нами при интегрированном анализе совокупности транскриптомных, протеомных и метаболомных данных по данному штамму. Это внесет значительный вклад в создание на основе <italic>L. brevis</italic> 47f фармабиотика для лечения различных воспалительных заболеваний.</p></trans-abstract><kwd-group xml:lang="en"><kwd>transcriptomic analysis</kwd><kwd><italic>Levilactobacillus brevis</italic></kwd><kwd>hydrogen peroxide</kwd><kwd>aerobic growth.</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>транскриптомный анализ</kwd><kwd><italic>Levilactobacillus brevis</italic></kwd><kwd>перекись водорода</kwd><kwd>аэробный рост.</kwd></kwd-group></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Feyereisen M., Mahony J., Kelleher P. et al. Comparative genome analysis of the Lactobacillus brevis species // BMC Genomics. 2019. V. 20. № 1. 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