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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="research-article" dtd-version="1.2" xml:lang="en"><front><journal-meta><journal-id journal-id-type="publisher-id">Acta Naturae</journal-id><journal-title-group><journal-title xml:lang="en">Acta Naturae</journal-title><trans-title-group xml:lang="ru"><trans-title>Acta Naturae</trans-title></trans-title-group></journal-title-group><issn publication-format="print">2075-8251</issn><publisher><publisher-name xml:lang="en">Acta Naturae Ltd</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">11747</article-id><article-id pub-id-type="doi">10.32607/actanaturae.11747</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>Research Articles</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>Экспериментальные статьи</subject></subj-group><subj-group subj-group-type="article-type"><subject>Research Article</subject></subj-group></article-categories><title-group><article-title xml:lang="en"><italic>Rhodobacter capsulatus</italic> PG Lipopolysaccharide Blocks the Effects of a Lipoteichoic Acid, a Toll-Like Receptor 2 Agonist</article-title><trans-title-group xml:lang="ru"><trans-title>Липополисахарид <italic>Rhodobacter capsulatus</italic> PG блокирует эффекты липотейхоевой кислоты – агониста Toll-подобного рецептора 2</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-5161-8490</contrib-id><contrib-id contrib-id-type="scopus">8222427800</contrib-id><contrib-id contrib-id-type="researcherid">J-12102018</contrib-id><name-alternatives><name xml:lang="en"><surname>Zubova</surname><given-names>Svetlana V.</given-names></name><name xml:lang="ru"><surname>Зубова</surname><given-names>Светлана Владимировна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="ru"><p>кандидат биологических наук, старший научный сотрудник лаборатории молекулярной биомедицины</p></bio><email>zusvet@rambler.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Kosyakova</surname><given-names>Nelli I.</given-names></name><name xml:lang="ru"><surname>Косякова</surname><given-names>Нелли Ивановна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="ru"><p>доктор медицинских наук, профессор, врач аллерголог-иммунолог, зав. отделением аллергологии-иммунологии</p></bio><email>nelia_kosiakova@mail.ru</email><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-0359-1331</contrib-id><contrib-id contrib-id-type="scopus">16541638600</contrib-id><contrib-id contrib-id-type="researcherid">J-1853-2018</contrib-id><name-alternatives><name xml:lang="en"><surname>Grachev</surname><given-names>Sergey V.</given-names></name><name xml:lang="ru"><surname>Грачев</surname><given-names>Сергей Витальевич</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="ru"><p>академик РАН, доктор медицинских наук, заведующий лаборатории молекулярной биомедицины</p></bio><email>grachevscience@gmail.com</email><xref ref-type="aff" rid="aff1"/><xref ref-type="aff" rid="aff3"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-0787-7679</contrib-id><contrib-id contrib-id-type="scopus">7004004963</contrib-id><contrib-id contrib-id-type="researcherid">B-17662016</contrib-id><name-alternatives><name xml:lang="en"><surname>Prokhorenko</surname><given-names>Isabella R.</given-names></name><name xml:lang="ru"><surname>Прохоренко</surname><given-names>Изабелла Рувимовна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="ru"><p>доктор биологических наук, главный научный сотрудник лаборатории молекулярной биомедицины</p></bio><email>isabella03@rambler.ru</email><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Institute of Basic Biological Problems of RAS FRC PSCBR RAS</institution></aff><aff><institution xml:lang="ru">Институт фундаментальных проблем биологии РАН, ФИЦ ПНЦБИ РАН</institution></aff></aff-alternatives><aff-alternatives id="aff2"><aff><institution xml:lang="en">Clinical Hospital at the Pushchino Research Center</institution></aff><aff><institution xml:lang="ru">Больница Пущинского научного центра РАН</institution></aff></aff-alternatives><aff-alternatives id="aff3"><aff><institution xml:lang="en">First Moscow State Medical University named I.M. Sechenov of Russia Health Ministry (Sechenov University)</institution></aff><aff><institution xml:lang="ru">Первый Московский государственный медицинский университет им. И.М. Сеченова Минздрава России (Сеченовский университет)</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2022-12-26" publication-format="electronic"><day>26</day><month>12</month><year>2022</year></pub-date><volume>14</volume><issue>4</issue><issue-title xml:lang="en"/><issue-title xml:lang="ru"/><fpage>69</fpage><lpage>74</lpage><history><date date-type="received" iso-8601-date="2022-06-07"><day>07</day><month>06</month><year>2022</year></date><date date-type="accepted" iso-8601-date="2022-11-11"><day>11</day><month>11</month><year>2022</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2023, Zubova S.V., Kosyakova N.I., Grachev S.V., Prokhorenko I.R.</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2023, Зубова С.В., Косякова Н.И., Грачев С.В., Прохоренко И.Р.</copyright-statement><copyright-year>2023</copyright-year><copyright-holder xml:lang="en">Zubova S.V., Kosyakova N.I., Grachev S.V., Prokhorenko I.R.</copyright-holder><copyright-holder xml:lang="ru">Зубова С.В., Косякова Н.И., Грачев С.В., Прохоренко И.Р.</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://actanaturae.ru/2075-8251/article/view/11747">https://actanaturae.ru/2075-8251/article/view/11747</self-uri><abstract xml:lang="en"><p>Lipopolysaccharides (LPS) and lipoteichoic acids (LTA) are the major inducers of the inflammatory response of blood cells caused by Gram-negative and some Gram-positive bacteria. CD14 is a common receptor for LPS and LTA that transfers the ligands to TLR4 and TLR2, respectively. In this work, we have demonstrated that the non-toxic LPS from<italic> Rhodobacter capsulatus</italic> PG blocks the synthesis of pro-inflammatory cytokines during the activation of blood cells by <italic>Streptococcus pyogenes</italic> LTA through binding to the CD14 receptor, resulting in the signal transduction to TLR2/TLR6 being blocked. The LPS from <italic>Rhodobacter capsulatus</italic> PG can be considered a prototype for developing preparations to protect blood cells against the LTA of gram-positive bacteria.</p></abstract><trans-abstract xml:lang="ru"><p>Липополисахариды (LPS) и липотейхоевые кислоты (LTA) являются главными индукторами воспалительных ответов клеток крови, вызываемых грамотрицательными и некоторыми грамположительными бактериями. CD14 – общий рецептор LPS и LTA, передает лиганды на TLR4 и TLR2 соответственно. Нами показано, что нетоксичный LPS <italic>Rhodobacter</italic> <italic>capsulatus</italic> PG блокирует синтез провоспалительных цитокинов при активации клеток крови LTA <italic>Streptococcus</italic> <italic>pyogenes</italic>, связываясь с рецептором CD14, что приводит к блокировке передачи сигнала к TLR2/TLR6. LPS <italic>Rhodobacter</italic> <italic>capsulatus</italic> PG можно рассматривать как прототип для создания препаратов, защищающих клетки крови от действия LTA грамположительных бактерий.</p></trans-abstract><kwd-group xml:lang="en"><kwd>lipopolysaccharide</kwd><kwd>Rhodobacter capsulatus</kwd><kwd>lipoteichoic acid</kwd><kwd>TLR</kwd><kwd>CD14</kwd><kwd>cytokines</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>липополисахариды</kwd><kwd>Rhodobacter capsulatus</kwd><kwd>липотейхоевые кислоты</kwd><kwd>TLR</kwd><kwd>CD14</kwd><kwd>цитокины</kwd></kwd-group><funding-group><award-group><funding-source><institution-wrap><institution xml:lang="ru">Министерство образования и науки Российской Федерации</institution></institution-wrap><institution-wrap><institution xml:lang="en">Ministry of Education and Science of the Russian Federation</institution></institution-wrap></funding-source><award-id>122041200039-0</award-id></award-group></funding-group></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Ginsburg L. // Lancet. 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