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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="en"><front><journal-meta><journal-id journal-id-type="publisher-id">akusherstvo</journal-id><journal-title-group><journal-title xml:lang="en">Obstetrics, Gynecology and Reproduction</journal-title><trans-title-group xml:lang="ru"><trans-title>Акушерство, Гинекология и Репродукция</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2313-7347</issn><issn pub-type="epub">2500-3194</issn><publisher><publisher-name>IRBIS LLC</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.17749/2313-7347/ob.gyn.rep.2024.504</article-id><article-id custom-type="elpub" pub-id-type="custom">akusherstvo-2049</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="en"><subject>ОRIGINAL ARTICLES</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="ru"><subject>ОРИГИНАЛЬНЫЕ СТАТЬИ</subject></subj-group></article-categories><title-group><article-title>Detection frequency and duration of circulating antiphospholipid syndrome markers in patients with verified COVID-19</article-title><trans-title-group xml:lang="ru"><trans-title>Частота обнаружения и длительность циркуляции маркеров антифосфолипидного синдрома у пациентов с подтвержденным диагнозом COVID-19</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-5161-908X</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Михайлова</surname><given-names>Ю. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Mikhailova</surname><given-names>Yu. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Юлия Владимировна Михайлова, к.б.н., главный редактор, начальник отдела</p><p>редакционно-издательский отдел </p><p>603093; ул. Яблоневая, д. 22 (а/я 69); Нижний Новгород</p></bio><bio xml:lang="en"><p>Yulia V. Mikhailova, MD, PhD (Biology), Editor-in-Chief, Head of the Department</p><p>Editorial and Publishing Department</p><p>603093; 22 Yablonevaya Str.; Nizhny Novgorod</p></bio><email xlink:type="simple">mikhailovauv@npods.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Чепурченко</surname><given-names>Н. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Chepurchenko</surname><given-names>N. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Наталья Валерьевна Чепурченко, микробиолог</p><p>отдел внедрения новых технологий</p><p>603093; ул. Яблоневая, д. 22 (а/я 69); Нижний Новгород</p></bio><bio xml:lang="en"><p>Natalia V. Chepurchenko, MD, Microbiologist</p><p>New Technologies Implementation Department</p><p>603093; 22 Yablonevaya Str.; Nizhny Novgorod</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Обрядина</surname><given-names>А. П.</given-names></name><name name-style="western" xml:lang="en"><surname>Obriadina</surname><given-names>A. P.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Анна Петровна Обрядина, д. б. н., зам. генерального директора</p><p>603093; ул. Яблоневая, д. 22 (а/я 69); Нижний Новгород</p></bio><bio xml:lang="en"><p>Anna P. Obriadina, MD, Dr Sci Biol, Deputy Director General</p><p>603093; 22 Yablonevaya Str.; Nizhny Novgorod</p></bio><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>ООО «НПО «Диагностические системы»</institution><country>Россия</country></aff><aff xml:lang="en"><institution>RPC Diagnostic Systems Ltd</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2024</year></pub-date><pub-date pub-type="epub"><day>18</day><month>05</month><year>2024</year></pub-date><volume>18</volume><issue>2</issue><fpage>180</fpage><lpage>187</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Mikhailova Y.V., Chepurchenko N.V., Obriadina A.P., 2024</copyright-statement><copyright-year>2024</copyright-year><copyright-holder xml:lang="ru">Михайлова Ю.В., Чепурченко Н.В., Обрядина А.П.</copyright-holder><copyright-holder xml:lang="en">Mikhailova Y.V., Chepurchenko N.V., Obriadina A.P.</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://www.gynecology.su/jour/article/view/2049">https://www.gynecology.su/jour/article/view/2049</self-uri><abstract><sec><title>   Aim</title><p>   Aim: to develop enzyme-linked immunosorbent tests for assessing the antiphospholipid syndrome (APS) markers and determine prevalence of three antiphospholipid antibody (aPL) types at different COVID-19 stages.</p></sec><sec><title>   Materials and Methods</title><p>   Materials and Methods. A comparative longitudinal controlled study was conducted by examining 120 subjects with COVID-19 diagnosis verified by reverse transcription polymerase chain reaction. Donor serum samples collected before November 2019 were used as a control group. The laboratory study included measurement of IgA, IgM and IgG against β2-glycoprotein 1 (β2-GP1), cardiolipin, phosphatidylserine-prothrombin complex (PS-PT) by using domestically produced test systems based on indirect two-step enzyme-linked immunosorbent assay.</p></sec><sec><title>   Results</title><p>   Results. Validation of the developed experimental tests was carried out in comparison with foreign commercial analogues in accordance with international standards. Alternative antigenic targets for effective diagnosis of antibodies against β2-GP1 were studied. Analyzing rate of aPL in patients at different COVID-19 stages showed that in acute vs. convalescence stage it was higher by 1.3-fold (81.7 and 65.0 %, respectively). The first rank detection place was assigned to IgG against β2-GP1, cardiolipin and PS-PT, the second – IgM against cardiolipin. The profile of the detected antibodies changed at various COVID-19 stages driven by time frame elapsed from the moment of diagnosis.</p></sec><sec><title>   Conclusion</title><p>   Conclusion. Recombinant constructs are created and analytical conditions are optimized for determining various aPL types. It was shown that along with other viral infections, COVID-19 triggers autoantibody production demonstrating that 54.2 % individuals infected with SARS-CoV-2 were positive at least for one autoantibody type. The majority of such virus-associated aPL are presumably transiently positive.</p></sec></abstract><trans-abstract xml:lang="ru"><sec><title>   Цель</title><p>   Цель: разработать иммуноферментные тесты для определения маркеров антифосфолипидного синдрома (АФС) и определить частоту обнаружения трех типов антифосфолипидных антител (аФЛ) у пациентов с COVID-19 на разных стадиях заболевания.</p></sec><sec><title>   Материалы и методы</title><p>   Материалы и методы. Проведено сравнительное продольное контролируемое исследование, обследованы 120 человек с диагнозом COVID-19, подтвержденным с помощью полимеразной цепной реакции с обратной транскрипцией. В качестве контрольной группы использовали образцы сыворотки крови доноров, собранные до ноября 2019 г. Лабораторное исследование включало определение IgA, IgM и IgG к кардиолипину, β2-гликопротеину 1 (англ. β2-glycoprotein 1, β2-GP1), фосфатидилсерин-протромбиновому комплексу (англ. phosphatidylserine-prothrombin complex, PS-PT) с использованием тест-систем отечественного производства на основе непрямого двухстадийного иммуноферментного анализа.</p></sec><sec><title>   Результаты</title><p>   Результаты. Валидация разработанных экспериментальных тестов проведена в сравнении с коммерческими аналогами зарубежного производства и относительно международных стандартов. Изучены альтернативные антигенные мишени для эффективной диагностики антител к β2-GP1. Анализ частоты обнаружения аФЛ у пациентов на разных стадиях COVID-19 показал, что аутоантитела среди пациентов в острой фазе встречались в 1,3 раза чаще, чем в стадии реконвалесценции (81,7 и 65,0 % соответственно). Первое ранговое место по частоте обнаружения занимали IgG к β2-GP1, кардиолипину и PS-PT, второе – IgM к кардиолипину. Профиль выявляемых аФЛ изменялся в зависимости от стадии заболевания и времени, прошедшего от момента постановки диагноза.</p></sec><sec><title>   Заключение</title><p>   Заключение. Созданы рекомбинантные конструкции и оптимизированы условия проведения анализа для определения различных типов аФЛ. Показано, что наравне с другими вирусными инфекциями COVID-19 является триггером выработки аутоантител. У 54,2 % лиц, инфицированных SARS-CoV-2, обнаруживался как минимум один тип аутоантител. Большинство из этих вирус-ассоциированных аФЛ предположительно являются транзиторно позитивными.</p></sec></trans-abstract><kwd-group xml:lang="ru"><kwd>антифосфолипидные антитела</kwd><kwd>аФЛ</kwd><kwd>COVID-19</kwd><kwd>антифосфолипидный синдром</kwd><kwd>АФС</kwd><kwd>антитела к β2-гликопротеину 1</kwd><kwd>aβ2-GP1</kwd><kwd>антитела к кардиолипину</kwd><kwd>aCL</kwd><kwd>антитела к фосфатидилсерин-протромбиновому комплексу</kwd><kwd>aPS-PT</kwd></kwd-group><kwd-group xml:lang="en"><kwd>antiphospholipid antibodies</kwd><kwd>aPL</kwd><kwd>COVID-19</kwd><kwd>antiphospholipid syndrome</kwd><kwd>APS</kwd><kwd>anti-β2-glycoprotein 1 antibodies</kwd><kwd>аβ2-GP1</kwd><kwd>anticardiolipin antibodies</kwd><kwd>aCL</kwd><kwd>anti-phosphatidylserine-prothrombin complex antibodies</kwd><kwd>aPS-PT</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Работа выполнена на базе ООО «НПО «Диагностические системы»</funding-statement><funding-statement xml:lang="en">The work was performed at the RPC Diagnostic Systems, Ltd.</funding-statement></funding-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Abdel-Wahab N., Talathi S., Lopez-Olivo M.A., Suarez-Almazor M.E. 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