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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">avk</journal-id><journal-title-group><journal-title xml:lang="ru">Архивъ внутренней медицины</journal-title><trans-title-group xml:lang="en"><trans-title>The Russian Archives of Internal Medicine</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2226-6704</issn><issn pub-type="epub">2411-6564</issn><publisher><publisher-name>“SINAPS” LLC</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.20514/2226-6704-2025-15-4-284-295</article-id><article-id custom-type="edn" pub-id-type="custom">NXKLDU</article-id><article-id custom-type="elpub" pub-id-type="custom">avk-2046</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>ОРИГИНАЛЬНЫЕ СТАТЬИ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>ORIGINAL ARTICLE</subject></subj-group></article-categories><title-group><article-title>Особенности состояния системы коллагенолиза и факторы риска ее изменений у пациентов при длительном постковидном синдроме</article-title><trans-title-group xml:lang="en"><trans-title>Features of the State of the Collagenolysis System and risk factors of Its Changes in Patients with Long-Term Post-COVID Syndrome</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0009-0006-3364-0591</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Масалкина</surname><given-names>О. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Masalkina</surname><given-names>O. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Масалкина Ольга Владимировна — к.м.н., доцент кафедры пропедевтики внутренних болезней № 2</p><p>Пермь</p></bio><bio xml:lang="en"><p>Olga V. Masalkina — MD, PhD, Associate Professor of the Department of Internal Medicine Propaedeutics No. 2</p><p>Perm</p></bio><email xlink:type="simple">omasalkina@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-3694-3647</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Полянская</surname><given-names>Е. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Polyanskaya</surname><given-names>E. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Полянская Елена Александровна — д.м.н., доцент кафедры пропедевтики внутренних болезней № 2</p><p>Пермь</p></bio><bio xml:lang="en"><p>Elena A. Polyanskaya — MD, PhD, associate professor of the department of propaedeutics of internal diseases № 2</p><p>Perm</p></bio><email xlink:type="simple">anna_chernyavina@list.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-7003-5186</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Козиолова</surname><given-names>Н. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Koziolova</surname><given-names>N. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Козиолова Наталья Андреевна — д.м.н., зав. каф., профессор кафедры пропедевтики внутренних болезней № 2 </p><p>Пермь</p></bio><bio xml:lang="en"><p>Natalya A. Koziolova — MD, Head of the dep., professor of the department of propaedeutics of internal diseases № 2</p><p>Perm</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/0000-0002-0051-6694</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Чернявина</surname><given-names>А. И.</given-names></name><name name-style="western" xml:lang="en"><surname>Chernyavina</surname><given-names>A. I.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Чернявина Анна Ивановна — д.м.н., доцент кафедры пропедевтики внутренних болезней № 2 </p><p>Пермь</p></bio><bio xml:lang="en"><p>Anna I. Chernyavina — MD, PhD, Associate Professor of the Department of Internal Medicine Propaedeutics No. 2</p><p>Perm</p></bio><email xlink:type="simple">anna_chernyavina@list.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>ФГБОУ ВО «Пермский государственный медицинский университет&#13;
имени академика Е.А. Вагнера» Министерства здравоохранения РФ</institution><country>Россия</country></aff><aff xml:lang="en"><institution>FSBEI HE «Academician Ye.A. Wagner Perm State Medical University»&#13;
of the Ministry of Healthcare of the Russian Federation</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2025</year></pub-date><pub-date pub-type="epub"><day>29</day><month>07</month><year>2025</year></pub-date><volume>15</volume><issue>4</issue><fpage>284</fpage><lpage>295</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Масалкина О.В., Полянская Е.А., Козиолова Н.А., Чернявина А.И., 2025</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="ru">Масалкина О.В., Полянская Е.А., Козиолова Н.А., Чернявина А.И.</copyright-holder><copyright-holder xml:lang="en">Masalkina O.V., Polyanskaya E.A., Koziolova N.A., Chernyavina A.I.</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.medarhive.ru/jour/article/view/2046">https://www.medarhive.ru/jour/article/view/2046</self-uri><abstract><p>Цель: оценить состояние системы коллагенолиза у пациентов при длительном постковидном синдроме, определить особенности и факторы риска ее изменений. Материалы и методы исследования. В исследование было включено 178 пациентов (мужчин — 59, женщин — 119; возраст 57,15±12,4 лет) после перенесенной новой коронавирусной инфекции (НКВИ) 12 и более недель назад. В зависимости от наличия или отсутствия симптомов длительного постковидного синдрома пациенты, перенесшие НКВИ 12 и более недель назад, были разделены на 2 группы: первую группу составили 88 пациентов с симптомами «Long-covid»; вторую группу — 90 обследуемых без каких-либо симптомов «Long-covid». Результаты. Средний период после перенесенной НКВИ составил 8,5[3,6;12,4] месяцев. У всех пациентов, перенесших НКВИ, тканевый ингибитор матриксных металлопротеиназ 1 типа (TIMP1) был выше референсного значения (135 пг/мл). У пациентов первой группы TIMP1 был ниже, чем во второй группе: 315,5 [145,0;410,0] пг/мл против 513,5 [415,0; 865,0] пг/мл (р&lt;0,001). Следовательно, при длительном постковидном синдроме развивается коллагенолитический паттерн на фоне увеличения риска формирования фиброза. Заключение. У пациентов, перенесших НКВИ, с длительным постковидным синдромом состояние системы коллагенолиза характеризуется развитием коллагенолитического паттерна на фоне преобладающих процессов коллагенообразования в сравнении с бессимптомными пациентами, перенесшими НКВИ 12 недель назад и более, который может быть рассмотрен как патогенетический механизм формирования «Long Covid».</p></abstract><trans-abstract xml:lang="en"><p>Objective: to assess the state of the collagenolysis system in patients with long-term post-COVID syndrome, to determine the features and risk factors of its changes. Materials and methods. The study included 178 patients who had had a new coronavirus infection (NCVI) 12 weeks or more ago, depending on the presence or absence of symptoms of long-term post-COVID syndrome, patients who had NCVI 12 or more weeks ago were divided into 2 groups: the first group consisted of 88 patients with Long-covid symptoms; the second group consisted of 90 subjects without any symptoms of Long-covid. Results. The median period after NCVI was 8.5 [3.6; 12.4] months. In all patients who underwent NCVI, tissue inhibitor of matrix metalloproteinase type 1 (TIMP1) was higher than the reference value (135 pg/ml). In the patients of the first group, TIMP1 was lower than in the second group: 315.5 [145.0; 620.0] pg/mL vs. 513.5 [220.0; 865.0] pg/mL (p &lt; 0.001). Therefore, in long-term post-COVID syndrome, a collagenolytic pattern develops against the background of an increased risk of fibrosis. Conclusion. In patients who have undergone NCVI with a long-term post-COVID syndrome, the state of the collagenolysis system is characterized by the development of a collagenolytic pattern against the background of the prevailing processes of collagen formation in comparison with asymptomatic patients who had NCVI 12 weeks ago or more, which can be considered as a pathogenetic mechanism for the formation of “Long Covid”.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>система коллагенолиза</kwd><kwd>длительный постковидный синдром</kwd></kwd-group><kwd-group xml:lang="en"><kwd>collagenolysis system</kwd><kwd>long-term post-COVID syndrome</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Авторы заявляют об отсутствии финансирования при проведении исследования</funding-statement><funding-statement xml:lang="en">The authors declare no funding for this study</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">da Silva R, Vallinoto ACR, Dos Santos EJM. 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