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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">ivm</journal-id><journal-title-group><journal-title xml:lang="ru">Международный вестник ветеринарии</journal-title><trans-title-group xml:lang="en"><trans-title>International Journal of Veterinary Medicine</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2072-2419</issn><publisher><publisher-name>SpbGUVM Publishing House</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.52419/issn2072-2419.2026.2.137</article-id><article-id custom-type="elpub" pub-id-type="custom">ivm-2102</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>ФАРМАКОЛОГИЯ, ТОКСИКОЛОГИЯ, ФАРМАЦИЯ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>PHARMACOLOGY, TOXICOLOGY, PHARMACY</subject></subj-group></article-categories><title-group><article-title>Биореакторная оптимизация коэкспрессии гетерологичных белков в рекомбинантном штамме Lactobacillus spp.</article-title><trans-title-group xml:lang="en"><trans-title>Bioreactor optimization of heterologous protein co-expression in a recombinant Lactobacillus spp. strain</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-2730-2482</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Самойленко</surname><given-names>В. С.</given-names></name><name name-style="western" xml:lang="en"><surname>Samoylenko</surname><given-names>V. S.</given-names></name></name-alternatives><bio xml:lang="ru"><p>канд. ветеринар. наук, доц., зав. каф. зоологии и паразитологии </p></bio><bio xml:lang="en"><p>PhD in Veterinary Sciences, Associate Professor, Head of the Department of Zoology and Parasitology</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0009-0002-5655-1170</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Лапина</surname><given-names>А. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Lapina</surname><given-names>A. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>специалист учебно-лабораторного комплекса</p></bio><bio xml:lang="en"><p>Specialist in the Educational and Laboratory Complex</p></bio><email xlink:type="simple">alinagisa@yandex.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>ФГАОУ ВО «Северо-Кавказский федеральный университет»</institution><country>Россия</country></aff><aff xml:lang="en"><institution>North Caucasus Federal University</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2026</year></pub-date><pub-date pub-type="epub"><day>19</day><month>08</month><year>2026</year></pub-date><volume>0</volume><issue>2</issue><fpage>137</fpage><lpage>141</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Самойленко В.С., Лапина А.А., 2026</copyright-statement><copyright-year>2026</copyright-year><copyright-holder xml:lang="ru">Самойленко В.С., Лапина А.А.</copyright-holder><copyright-holder xml:lang="en">Samoylenko V.S., Lapina A.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://vetjournal.spbguvm.ru/jour/article/view/2102">https://vetjournal.spbguvm.ru/jour/article/view/2102</self-uri><abstract><p>Разработка высокопродуктивных пробиотических штаммов, способных к синтезу терапевтических белков, требует комплексного подхода, сочетающего генетическое конструирование с оптимизацией условий ферментации. В данном исследовании разработан и валидирован усовершенствованный протокол трехэтапного культивирования рекомбинантного штамма Lactobacillus spp., обеспечивающего коэкспрессию интерлейкинов IL-10 и IL-22, в биореакторе с автоматическим контролем критических параметров — pH, температура, растворенный кислород. В работе использовали рекомбинантные штаммы, трансформированные плазмидой pLacDualIL10/IL22. Культивирование проводили в стеклянном биореакторе (рабочий объем 600 мл) с автоматическим контролем pH, температуры и растворенного кислорода. Реализован трехэтапный режим: фаза роста (37°C, pH 6,8), фаза индукции (1 мМ IPTG, 30°C) и фаза продукции. Очистку белков проводили тангенциальной ультрафильтрацией и аффинной хроматографией на Ni-NTA агарозе. Количественный анализ IL-10 и IL-22 выполняли методом ELISA, чистоту оценивали с помощью SDS-PAGE, биологическую активность – в пролиферативном тесте на лимфоцитах PBMC. Применение стратегии, включающей фазы роста, индукции (1 мМ IPTG, 30°C) и продукции, позволило достичь значительного увеличения выхода целевых белков: до 120±15 мг/л для IL-10 и 95±10 мг/л для IL-22, что в 2—3 раза превышает показатели при культивировании в колбах. Последующая очистка методом тангенциальной ультрафильтрации и аффинной хроматографии обеспечила получение белков высокой степени чистоты &gt;95 % и &gt;93 %, соответственно с сохраненной биологической активностью 1,2×106 ЕД/мг для IL-10 и 8,5×105 ЕД/мг для IL-22. Предложенная методика демонстрирует высокую воспроизводимость и эффективность, что подтверждает ее перспективность для масштабируемого производства функциональных рекомбинантных цитокинов на пробиотической платформе.</p></abstract><trans-abstract xml:lang="en"><p>The development of high-performance probiotic strains capable of synthesizing therapeutic proteins requires an integrated approach combining genetic engineering with optimization of fermentation conditions. In this study, an improved three-stage cultivation protocol for a recombinant Lactobacillus spp. strain co-expressing interleukins IL-10 and IL-22 was developed and validated in a bioreactor with automatic control of critical parameters, including pH, temperature, and dissolved oxygen. Recombinant strains transformed with the pLacDualIL10/IL22 plasmid were used. Cultivation was performed in a glass bioreactor (working volume 600 mL) equipped with automated monitoring and regulation of pH, temperature, and dissolved oxygen. A three-stage режим was implemented, consisting of a growth phase (37°C, pH 6.8), an induction phase (1 mM IPTG, 30°C), and a production phase. Protein purification was carried out by tangential flow ultrafiltration followed by affinity chromatography on Ni-NTA agarose. Quantitative determination of IL-10 and IL-22 was performed using ELISA; purity was assessed by SDS-PAGE, and biological activity was evaluated using a PBMC lymphocyte proliferation assay. Application of the three-stage strategy resulted in a significant increase in target protein yield, reaching 120±15 mg/L for IL-10 and 95±10 mg/L for IL-22, which is 2—3 times higher than that achieved in flask cultivation. Subsequent purification provided high-purity proteins (&gt;95 % and &gt;93 %, respectively) with preserved biological activity of 1,2×106 U/mg for IL-10 and 8,5 × 105 U/mg for IL-22. The proposed methodology demonstrates high reproducibility and efficiency, confirming its potential for scalable production of functional recombinant cytokines using a probiotic platform.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>биореактор</kwd><kwd>лактобактерии</kwd><kwd>плазмиды</kwd><kwd>интерлейкины</kwd><kwd>белки</kwd><kwd>коэкспрессия</kwd><kwd>культивирование</kwd></kwd-group><kwd-group xml:lang="en"><kwd>Bioreactor</kwd><kwd>lactobacilli</kwd><kwd>plasmids</kwd><kwd>interleukins</kwd><kwd>proteins</kwd><kwd>coexpression</kwd><kwd>cultivation</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">He, Y. Probiotic potential of lactic acid bacteria isolated from yaks / Y. He, F. Li, M. Xu, Z. Wang, H. Li // Animal Diseases. — 2024. — Vol. 4, No. 1. — Art. 17. DOI: 10.1186/s44149-024-00124-z.</mixed-citation><mixed-citation xml:lang="en">He, Y. 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