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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">Problems of Virology</journal-id><journal-title-group><journal-title xml:lang="en">Problems of Virology</journal-title><trans-title-group xml:lang="ru"><trans-title>Вопросы вирусологии</trans-title></trans-title-group></journal-title-group><issn publication-format="print">0507-4088</issn><issn publication-format="electronic">2411-2097</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">635</article-id><article-id pub-id-type="doi">10.36233/0507-4088-123</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>TO VIROLOGIST’S AID</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>В ПОМОЩЬ ВИРУСОЛОГУ</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 of a method for detection of specific antibodies to E protein of yellow fever virus (Flaviviridae: Flavivirus) by enzyme immunoassay</article-title><trans-title-group xml:lang="ru"><trans-title>Разработка способа выявления специфических антител к белку Е вируса жёлтой лихорадки (Flaviviridae: Flavivirus)методом иммуноферментного анализа</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-5181-0415</contrib-id><name-alternatives><name xml:lang="en"><surname>Krivosheina</surname><given-names>Ekaterina I.</given-names></name><name xml:lang="ru"><surname>Кривошеина</surname><given-names>Екатерина И.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>mikkartash@yandex.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-7857-6822</contrib-id><name-alternatives><name xml:lang="en"><surname>Kartashov</surname><given-names>Mikhail Y.</given-names></name><name xml:lang="ru"><surname>Карташов</surname><given-names>Михаил Юрьевич</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Ph.D. (Biol.), Senior Researcher, Department of Molecular Virology of Flaviviruses and Viral Hepatitis</p></bio><bio xml:lang="ru"><p>канд. биол. наук, старший научный сотрудник отдела молекулярной вирусологии флавивирусов и вирусных гепатитов</p></bio><email>mikkartash@yandex.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/0000-0001-6474-3696</contrib-id><name-alternatives><name xml:lang="en"><surname>Naidenova</surname><given-names>Ekaterina V.</given-names></name><name xml:lang="ru"><surname>Найденова</surname><given-names>Екатерина В.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>mikkartash@yandex.ru</email><xref ref-type="aff" rid="aff3"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-2171-7444</contrib-id><name-alternatives><name xml:lang="en"><surname>Ushkalenko</surname><given-names>Nikita D.</given-names></name><name xml:lang="ru"><surname>Ушкаленко</surname><given-names>Никита Д.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>mikkartash@yandex.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-6593-6614</contrib-id><name-alternatives><name xml:lang="en"><surname>Pyankov</surname><given-names>Stepan A.</given-names></name><name xml:lang="ru"><surname>Пьянков</surname><given-names>Степан А.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>mikkartash@yandex.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-1275-171X</contrib-id><name-alternatives><name xml:lang="en"><surname>Ternovoi</surname><given-names>Vladimir A.</given-names></name><name xml:lang="ru"><surname>Терновой</surname><given-names>Владимир А.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>mikkartash@yandex.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-0229-321X</contrib-id><name-alternatives><name xml:lang="en"><surname>Loktev</surname><given-names>Valery B.</given-names></name><name xml:lang="ru"><surname>Локтев</surname><given-names>Валерий Б.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>mikkartash@yandex.ru</email><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">FSSI State Scientific Center of Virology and Biotechnology “Vector”of the Federal Service for Surveillance of Consumer Rights Protection and Human Welfare (Rospotrebnadzor)</institution></aff><aff><institution xml:lang="ru">ФБУН «Государственный научный центр вирусологии и биотехнологии «Вектор» Роспотребнадзора</institution></aff></aff-alternatives><aff-alternatives id="aff2"><aff><institution xml:lang="en">Novosibirsk State University</institution></aff><aff><institution xml:lang="ru">ФГАОУ ВО «Новосибирский национальный исследовательский государственный университет» Минобрнауки России</institution></aff></aff-alternatives><aff-alternatives id="aff3"><aff><institution xml:lang="en">FSSI Russian Research Anti-Plague Institute «Microbe» of the Federal Service for Surveillance of Consumer Rights Protection and Human Welfare (Rospotrebnadzor)</institution></aff><aff><institution xml:lang="ru">ФКУН «Российский научно-исследовательский противочумный институт «Микроб» Роспотребнадзора</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2022-11-16" publication-format="electronic"><day>16</day><month>11</month><year>2022</year></pub-date><volume>67</volume><issue>4</issue><issue-title xml:lang="en"/><issue-title xml:lang="ru"/><fpage>341</fpage><lpage>350</lpage><history><date date-type="received" iso-8601-date="2022-08-25"><day>25</day><month>08</month><year>2022</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2022, Krivosheina E.I., Kartashov M.Y., Naidenova E.V., Ushkalenko N.D., Pyankov S.A., Ternovoi V.A., Loktev V.B.</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2022, Кривошеина Е.И., Карташов М.Ю., Найденова Е.В., Ушкаленко Н.Д., Пьянков С.А., Терновой В.А., Локтев В.Б.</copyright-statement><copyright-year>2022</copyright-year><copyright-holder xml:lang="en">Krivosheina E.I., Kartashov M.Y., Naidenova E.V., Ushkalenko N.D., Pyankov S.A., Ternovoi V.A., Loktev V.B.</copyright-holder><copyright-holder xml:lang="ru">Кривошеина Е.И., Карташов М.Ю., Найденова Е.В., Ушкаленко Н.Д., Пьянков С.А., Терновой В.А., Локтев В.Б.</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://virusjour.crie.ru/jour/article/view/635">https://virusjour.crie.ru/jour/article/view/635</self-uri><abstract xml:lang="en"><p><bold>Introduction.</bold> Yellow fever (YF) remains one of the most common natural focal infectious diseases in the world. In connection with the increasing tourist flow to countries endemic for YF, the discovery of stable populations of <italic>Aedes aegypti</italic> and <italic>Ae. albopictus</italic> which are the main vectors of the yellow fever virus (YFV), in the southern regions of Russia, and the fact that in medical institutions in our country it is possible to obtain a live attenuated vaccine against YF, but there is no way to evaluate the effectiveness of vaccination, the question arises of the development and implementation of diagnostic kits for detecting antibodies (AB) to the pathogen by enzyme immunoassay (ELISA).</p> <p><bold>The aim of this study</bold> was to develop a method for detecting specific IgG antibodies to the E protein of YFV by ELISA and assessing its diagnostic characteristics.</p> <p><bold>Materials and methods.</bold> A specific cDNA was synthesized by reverse transcription on an RNA template of YFV isolated on a cell culture of <italic>Aedes albopictus</italic> clone C6/36, and a fragment of the genome coding the YFV E protein was amplified and subsequently cloned into the plasmid pET160 (Thermo Fisher Scientific, USA). The resulting gene fragment was used as a DNA template to obtain a recombinant analog of the third domain of the YFV E protein in <italic>Escherichia coli</italic> cells (BL-21(DE3)). Next, the immunogenicity of the obtained antigen was evaluated and the analysis conditions were optimized.</p> <p><bold>Results. </bold>The optimal conditions for the production of the obtained recombinant E protein of YFV were determined, its specificity was confirmed by immunological methods (Western blot and ELISA), sorption buffers and blocking solutions were selected, and sensitivity and specificity of detection of antibodies to YFV using the recombinant antigen were assessed.</p> <p><bold>Conclusion.</bold> A method for the detection of specific IgG antibodies to the YFV E protein by ELISA was developed. This diagnostic kit can be used both to study the protective properties of the YF vaccine and to detect imported cases of infection in non-endemic areas.</p></abstract><trans-abstract xml:lang="ru"><p><bold>Введение. </bold>Жёлтая лихорадка (ЖЛ) остаётся одной из самых распространённых природно-очаговых инфекционных болезней в мире. В связи с возрастающим туристическим потоком в страны, эндемичные по ЖЛ, обнаружением на территории южных регионов России устойчивых популяций комаров видов <italic>Aedes aegypti</italic> и <italic>Ae. albopictus</italic>, являющихся основными переносчиками вируса ЖЛ (ВЖЛ), и тем фактом, что в медицинских учреждениях нашей страны можно получить живую аттенуированную вакцину против ЖЛ, но нет возможности оценки эффективности вакцинации, возникает вопрос о разработке и внедрении в практику диагностических наборов для выявления антител к возбудителю методом иммуноферментного анализа (ИФА).</p> <p><bold>Цель работы</bold> <bold>–</bold> разработка способа выявления специфических антител класса IgG к белку Е ВЖЛ методом ИФА и оценка его диагностических характеристик.</p> <p><bold>Материалы и методы. </bold>Методом обратной транскрипции на матрице РНК ВЖЛ, выделенного на клеточной культуре <italic>Aedes</italic> <italic>albopictus</italic> clone C6/36, синтезирована специфичная кДНК и амплифицирован участок генома белка Е ВЖЛ, который был клонирован в плазмиду pET160 (Thermo Fisher Scientific, США). Полученный фрагмент гена использовали в качестве ДНК-матрицы для создания рекомбинантного аналога третьего домена белка Е ВЖЛ в клетках <italic>Escherichia</italic> <italic>coli</italic> (BL-21(DE3)). Далее произведена оценка иммуногенности полученного антигена и оптимизация условий анализа.</p> <p><bold>Результаты. </bold>Определены оптимальные условия наработки полученного рекомбинантного белка Е ВЖЛ, подтверждена его специфичность иммунологическими методами (вестерн-блоттинг и ИФА), подобраны сорбционные буферы и блокирующие растворы, проведён анализ чувствительности и специфичности рекомбинантного антигена и антител к ВЖЛ.</p> <p><bold>Заключение. </bold>Был разработан способ выявления специфических антител класса IgG к белку Е ВЖЛ методом ИФА. Данный диагностический набор может использоваться как для изучения протективных свойств вакцины против ЖЛ, так и для выявления завозных случаев инфекции на неэндемичных территориях.</p></trans-abstract><kwd-group xml:lang="en"><kwd>yellow fever virus</kwd><kwd>specific antibodies</kwd><kwd>yellow fever diagnostics</kwd><kwd>flavivirus E protein</kwd><kwd>recombinant proteins</kwd><kwd>enzyme immunoassay</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>вирус жёлтой лихорадки</kwd><kwd>специфические антитела</kwd><kwd>диагностика жёлтой лихорадки</kwd><kwd>белок Е флавивирусов</kwd><kwd>рекомбинантные белки</kwd><kwd>иммуноферментный анализ</kwd></kwd-group><funding-group><award-group><funding-source><institution-wrap><institution xml:lang="ru">Распоряжение Правительства Российской Федерации</institution></institution-wrap><institution-wrap><institution xml:lang="en">The Orders of the Government of the Russian Federation</institution></institution-wrap></funding-source><award-id>№ 2985-р</award-id></award-group></funding-group></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>WHO. 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