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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">Journal of microbiology, epidemiology and immunobiology</journal-id><journal-title-group><journal-title xml:lang="en">Journal of microbiology, epidemiology and immunobiology</journal-title><trans-title-group xml:lang="ru"><trans-title>Журнал микробиологии, эпидемиологии и иммунобиологии</trans-title></trans-title-group></journal-title-group><issn publication-format="print">0372-9311</issn><issn publication-format="electronic">2686-7613</issn><publisher><publisher-name xml:lang="en">Central Research Institute for Epidemiology</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">18697</article-id><article-id pub-id-type="doi">10.36233/0372-9311-611</article-id><article-id pub-id-type="edn">zkqvtw</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>ORIGINAL RESEARCHES</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>ОРИГИНАЛЬНЫЕ ИССЛЕДОВАНИЯ</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">Development and evaluation of a recombinant monoclonal human antibody with virus-neutralizing activity against the F glycoprotein of respiratory syncytial virus</article-title><trans-title-group xml:lang="ru"><trans-title>Разработка и исследование вируснейтрализующей активности рекомбинантного человеческого антитела к F-гликопротеину респираторно-синцитиального вируса</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-0289-6560</contrib-id><name-alternatives><name xml:lang="en"><surname>Klotchenko</surname><given-names>Sergey A.</given-names></name><name xml:lang="ru"><surname>Клотченко</surname><given-names>Сергей Анатольевич</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Cand. Sci. (Biol.), Head, Laboratory of influenza vaccine</p></bio><bio xml:lang="ru"><p>к. б. н., зав. лаб. гриппозных вакцин</p></bio><email>fosfatik@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-7560-398X</contrib-id><name-alternatives><name xml:lang="en"><surname>Romanovskaya-Romanko</surname><given-names>Ekaterina A.</given-names></name><name xml:lang="ru"><surname>Романовская-Романько</surname><given-names>Екатерина Андреевна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Cand. Sci. (Biol.), leading researcher, Laboratory of vector vaccine</p></bio><bio xml:lang="ru"><p>к. б. н., в. н. с. лаб. векторных вакцин</p></bio><email>fosfatik@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-8196-3156</contrib-id><name-alternatives><name xml:lang="en"><surname>Plotnikova</surname><given-names>Marina A.</given-names></name><name xml:lang="ru"><surname>Плотникова</surname><given-names>Марина Александровна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Cand. Sci. (Biol.), senior researcher, Laboratory of vector vaccine</p></bio><bio xml:lang="ru"><p>к. б. н., с. н. с. лаб. векторных вакцин</p></bio><email>fosfatik@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-8609-8093</contrib-id><name-alternatives><name xml:lang="en"><surname>Pulkina</surname><given-names>Anastasia A.</given-names></name><name xml:lang="ru"><surname>Пулькина</surname><given-names>Анастасия Александровна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Cand. Sci. (Biol.), researcher, Laboratory of vector vaccine</p></bio><bio xml:lang="ru"><p>к. б. н., н. с. лаб. векторных вакцин</p></bio><email>fosfatik@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-8646-6252</contrib-id><name-alternatives><name xml:lang="en"><surname>Shaldzhyan</surname><given-names>Aram A.</given-names></name><name xml:lang="ru"><surname>Шалджян</surname><given-names>Арам Арутюнович</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>laboratory assistant researcher, Laboratory of gene engineering and recombinant protein expression</p></bio><bio xml:lang="ru"><p>лаборант-исследователь лаб. генной инженерии и экспрессии рекомбинантных белков</p></bio><email>fosfatik@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-7627-0600</contrib-id><name-alternatives><name xml:lang="en"><surname>Balabashin</surname><given-names>Dmitry S.</given-names></name><name xml:lang="ru"><surname>Балабашин</surname><given-names>Дмитрий Сергеевич</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Cand. Sci. (Biol.), junior researcher, Laboratory protein engineering</p></bio><bio xml:lang="ru"><p>к. б. н., м. н. с. лаб. инженерии белка</p></bio><email>fosfatik@mail.ru</email><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-7450-7096</contrib-id><name-alternatives><name xml:lang="en"><surname>Toporova</surname><given-names>Victoria A.</given-names></name><name xml:lang="ru"><surname>Топорова</surname><given-names>Виктория Александровна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>researcher, Laboratory protein engineering, laboratory assistant researcher</p></bio><bio xml:lang="ru"><p>н. с. лаб. инженерии белка, лаборант-исследователь</p></bio><email>fosfatik@mail.ru</email><xref ref-type="aff" rid="aff1"/><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-1753-9614</contrib-id><name-alternatives><name xml:lang="en"><surname>Aliev</surname><given-names>Teimur K.</given-names></name><name xml:lang="ru"><surname>Алиев</surname><given-names>Теймур Кантамирович</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Cand. Sci. (Chem.), Deputy Head, NTI Center, researcher, Department of chemical enzymology</p></bio><bio xml:lang="ru"><p>к. х. н., зам. рук. Центра НТИ, н. с. каф. химической энзимологии</p></bio><email>fosfatik@mail.ru</email><xref ref-type="aff" rid="aff2"/><xref ref-type="aff" rid="aff3"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-6907-0144</contrib-id><name-alternatives><name xml:lang="en"><surname>Gyulikhandanova</surname><given-names>Natalia E.</given-names></name><name xml:lang="ru"><surname>Гюлиханданова</surname><given-names>Наталия Евгеньевна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Cand. Sci. (Biol.), Deputy director</p></bio><bio xml:lang="ru"><p>к. б. н., зам. директора по проектной работе</p></bio><email>fosfatik@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-3643-7354</contrib-id><name-alternatives><name xml:lang="en"><surname>Lioznov</surname><given-names>Dmitry A.</given-names></name><name xml:lang="ru"><surname>Лиознов</surname><given-names>Дмитрий Анатольевич</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>D. Sci. (Med.), Professor, Director, Head, Department of infectious diseases and epidemiology</p></bio><bio xml:lang="ru"><p>д. м. н., профессор, директор, зав. каф. инфекционных болезней и эпидемиологии</p></bio><email>fosfatik@mail.ru</email><xref ref-type="aff" rid="aff1"/><xref ref-type="aff" rid="aff4"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Smorodintsev Research Institute of Influenza</institution></aff><aff><institution xml:lang="ru">Научно-исследовательский институт гриппа им. А.А. Смородинцева Минздрава России</institution></aff></aff-alternatives><aff-alternatives id="aff2"><aff><institution xml:lang="en">Shemyakin–Ovchinnikov Institute of bioorganic chemistry</institution></aff><aff><institution xml:lang="ru">Институт биоорганической химии имени М.М. Шемякина и Ю.А. Овчинникова РАН</institution></aff></aff-alternatives><aff-alternatives id="aff3"><aff><institution xml:lang="en">Lomonosov Moscow State University</institution></aff><aff><institution xml:lang="ru">Московский государственный университет имени М.В. Ломоносова</institution></aff></aff-alternatives><aff-alternatives id="aff4"><aff><institution xml:lang="en">First St. Petersburg State Medical University named after Academician I.P. Pavlov</institution></aff><aff><institution xml:lang="ru">Первый Санкт-Петербургский государственный медицинский университет имени академика И.П. Павлова</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2024-12-14" publication-format="electronic"><day>14</day><month>12</month><year>2024</year></pub-date><volume>101</volume><issue>6</issue><issue-title xml:lang="en"/><issue-title xml:lang="ru"/><fpage>735</fpage><lpage>747</lpage><history><date date-type="received" iso-8601-date="2024-11-28"><day>28</day><month>11</month><year>2024</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2024, Klotchenko S.A., Romanovskaya-Romanko E.A., Plotnikova M.A., Pulkina A.A., Shaldzhyan A.A., Balabashin D.S., Toporova V.A., Aliev T.K., Gyulikhandanova N.E., Lioznov D.A.</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2024, Клотченко С.А., Романовская-Романько Е.А., Плотникова М.А., Пулькина А.А., Шалджян А.А., Балабашин Д.С., Топорова В.А., Алиев Т.К., Гюлиханданова Н.Е., Лиознов Д.А.</copyright-statement><copyright-year>2024</copyright-year><copyright-holder xml:lang="en">Klotchenko S.A., Romanovskaya-Romanko E.A., Plotnikova M.A., Pulkina A.A., Shaldzhyan A.A., Balabashin D.S., Toporova V.A., Aliev T.K., Gyulikhandanova N.E., Lioznov D.A.</copyright-holder><copyright-holder xml:lang="ru">Клотченко С.А., Романовская-Романько Е.А., Плотникова М.А., Пулькина А.А., Шалджян А.А., Балабашин Д.С., Топорова В.А., Алиев Т.К., Гюлиханданова Н.Е., Лиознов Д.А.</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://microbiol.crie.ru/jour/article/view/18697">https://microbiol.crie.ru/jour/article/view/18697</self-uri><abstract xml:lang="en"><p><bold>Introduction.</bold> Respiratory syncytial virus (RSV) is the most common pathogen causing lower respiratory tract infections in children. RSV also poses a serious threat to the elderly and immunocompromised patients. Developing a therapy based on recombinant human antibodies to block the RSV fusion (F) glycoprotein is urgent to reduce the incidence of RSV infections and prevent associated complications.</p> <p><bold>Aim.</bold> To design plasmid vectors for efficient production of the recombinant monoclonal antibody FM1 in a eukaryotic expression system targeting the RSV fusion (F) glycoprotein and to evaluate its activity against RSV subtypes A and B in vitro.</p> <p><bold>Materials and methods.</bold> Constructs encoding the recombinant antibody FM1 were designed using genetic engineering. Recombinant antibodies were produced in the CHO-K1 cell line through transient expression. Antibody specimens were purified from the culture supernatant using affinity chromatography, with a modified protein A as the ligand. The virus-neutralizing activity of the antibody was evaluated in a microneutralization assay using several RSV strains on a Vero cell monolayer culture.</p> <p><bold>Results.</bold> We developed a two-plasmid vector system to produce the recombinant FM1 antibody targeting the RSV F glycoprotein, using CHO cells as transient producers. The antibody was successfully produced, purified, and characterized, with its biological activity confirmed. The FM1 antibody demonstrated enhanced virus-neutralizing activity against reference and seasonal RSV strains of subtypes A and B compared to the control drug palivizumab.</p> <p><bold>Conclusion.</bold> A recombinant FM1 antibody-based drug could address the import substitution challenge for protective measures against RSV infection. The authors are currently developing a stable FM1 producer clone with high productivity and viability and investigating the therapeutic efficacy of this antibody in a sublethal RSV infection mouse model.</p></abstract><trans-abstract xml:lang="ru"><p><bold>Введение.</bold> Респираторно-синцитиальный вирус (РСВ) является ведущим в структуре возбудителей инфекций нижних дыхательных путей у детей, а также представляет серьёзную угрозу для пожилых людей и пациентов с ослабленным иммунитетом. Разработка терапевтического препарата на основе рекомбинантных человеческих антител, направленных на блокирование F-гликопротеина РСВ, является актуальной задачей, поскольку позволит снизить заболеваемость РСВ-инфекцией и предотвратит развитие осложнений данной инфекции.</p> <p><bold>Цель </bold>исследования — конструирование плазмидных векторов для накопления высокоактивного рекомбинантного моноклонального антитела FM1 в эукариотической системе экспрессии, направленного против F-гликопротеина РСВ, и оценка специфической активности полученного антитела в отношении различных штаммов РСВ подтипов А и В <italic>in vitro</italic>.</p> <p><bold>Материалы и методы.</bold> Получение экспрессионных конструкций, кодирующих рекомбинантное антитело FM1, выполняли методами генной инженерии. Накопление антитела проводили в клеточной линии CHO-K1 путём транзиентной экспрессии. Препарат антитела очищали из культуральной жидкости методом аффинной хроматографии с использованием в качестве лиганда модифицированного белка А. Оценку вируснейтрализующей активности антитела оценивали в реакции микронейтрализации с несколькими штаммами РСВ на монослойной культуре клеток Vero.</p> <p><bold>Результаты.</bold> Создана двухплазмидная векторная система для экспрессии рекомбинантного антитела FM1 к F-гликопротеину РСВ, получен временный CHO-продуцент этого антитела. Антитело накоплено, очищено и охарактеризовано; доказана его биологическая активность. Продемонстрировано, что антитело обладает повышенной вируснейтрализующей активностью в отношении эталонных и сезонных штаммов РСВ подтипов А и В по сравнению с контрольным препаратом паливизумабом.</p> <p><bold>Заключение.</bold> Препарат на основе полученного рекомбинантного антитела FM1 позволит решить проблему импортозамещения средств защиты против РСВ-инфекции. В настоящее время коллектив авторов ведёт работу над получением стабильного клона-продуцента FM1 с высокой продуктивностью и жизнеспособностью, а также исследует терапевтическую эффективность этого антитела на модели сублетальной РСВ-инфекции у мышей.</p></trans-abstract><kwd-group xml:lang="en"><kwd>therapeutic monoclonal antibodies</kwd><kwd>respiratory syncytial virus</kwd><kwd>fusion (F) glycoprotein</kwd><kwd>neutralization assay</kwd><kwd>CHO cell line for recombinant antibodies production</kwd><kwd>Vero cells</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>терапевтические моноклональные антитела</kwd><kwd>респираторно-синцитиальный вирус</kwd><kwd>F-гликопротеин</kwd><kwd>реакция нейтрализации</kwd><kwd>CHO-продуцент рекомбинантных антител</kwd><kwd>культура клеток Vero</kwd></kwd-group><funding-group><award-group><funding-source><institution-wrap><institution xml:lang="ru">ООО «ОМК»</institution></institution-wrap><institution-wrap><institution xml:lang="en">OMK LLC</institution></institution-wrap></funding-source></award-group></funding-group></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Openshaw P.J.M., Chiu C., Culley F.J., et al. 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