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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">cardiotomsk</journal-id><journal-title-group><journal-title xml:lang="ru">Сибирский журнал клинической и экспериментальной медицины</journal-title><trans-title-group xml:lang="en"><trans-title>Siberian Journal of Clinical and Experimental Medicine</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2713-2927</issn><issn pub-type="epub">2713-265X</issn><publisher><publisher-name>TSU publishing</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.29001/2073-8552-2024-39-2-175-182</article-id><article-id custom-type="elpub" pub-id-type="custom">cardiotomsk-2321</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>ЭКСПЕРИМЕНТАЛЬНЫЕ ИССЛЕДОВАНИЯ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>EXPERIMENTAL STUDIES</subject></subj-group></article-categories><title-group><article-title>Бессимптомная бактериальная колонизация как причина воспалительной инфильтрации  биопротезов клапанов сердца на поздних сроках их функционирования</article-title><trans-title-group xml:lang="en"><trans-title>Asymptomatic bacterial invasion as the reason for  inflammation in bioprosthetic heart valves on later stages of their functioning</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-6099-0315</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Костюнин</surname><given-names>А. Е.</given-names></name><name name-style="western" xml:lang="en"><surname>Kostyunin</surname><given-names>A. E.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Костюнин Александр Евгеньевич, канд. биол. наук, научный сотрудник, лаборатория новых биоматериалов</p><p>650002, Кемерово, бульвар имени академика Л.С. Барбараша, 6</p></bio><bio xml:lang="en"><p>Alexander E. Kostyunin, Cand. Sci. (Biol.), Research Scientist, Laboratory of New Biomaterials</p><p>6, Academician Barbarash bulvar, Kemerovo, 650002,</p></bio><email xlink:type="simple">rhabdophis_tigrina@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/0000-0003-4890-0393</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Глушкова</surname><given-names>Т. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Glushkova</surname><given-names>T. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Глушкова Татьяна Владимировна, канд. биол. наук, старший научный сотрудник, лаборатория новых биоматериалов</p><p>650002, Кемерово, бульвар имени академика Л.С. Барбараша, 6</p></bio><bio xml:lang="en"><p>Tatyana V. Glushkova, Cand. Sci. (Biol.), Senior Research Scientist, Laboratory of New Biomaterials</p><p>6, Academician Barbarash bulvar, Kemerovo, 650002,</p></bio><email xlink:type="simple">bio.tvg@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/0000-0002-0747-2495</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Асанов</surname><given-names>М. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Asanov</surname><given-names>M. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Асанов Максим Айдарович, младший научный сотрудник, лаборатория геномной медицины</p><p>650002, Кемерово, бульвар имени академика Л.С. Барбараша, 6</p></bio><bio xml:lang="en"><p>Maxim A. Asanov, Junior Research Scientist, Laboratory of Genomic Medicine</p><p>6, Academician Barbarash bulvar, Kemerovo, 650002,</p></bio><email xlink:type="simple">asmaks988@gmail.com</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-0033-9376</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Акентьева</surname><given-names>Т. Н.</given-names></name><name name-style="western" xml:lang="en"><surname>Akentyeva</surname><given-names>T. N.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Акентьева Татьяна Николаевна, младший научный сотрудник, лаборатория новых биоматериалов</p><p>650002, Кемерово, бульвар имени академика Л.С. Барбараша, 6</p></bio><bio xml:lang="en"><p>Tatiana N. Akentyeva, Junior Research Scientist, Laboratory of New Biomaterials</p><p>6, Academician Barbarash bulvar, Kemerovo, 650002,</p></bio><email xlink:type="simple">t.akentyeva@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/0000-0003-3211-1250</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Клышников</surname><given-names>К. Ю.</given-names></name><name name-style="western" xml:lang="en"><surname>Klyshnikov</surname><given-names>K. Yu.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Клышников Кирилл Юрьевич, канд. мед. наук, научный сотрудник, лаборатория новых биоматериалов</p><p>650002, Кемерово, бульвар имени академика Л.С. Барбараша, 6</p></bio><bio xml:lang="en"><p>Kirill Yu. Klyshnikov, Cand. Sci. (Med.), Research Scientist, Laboratory of New Biomaterials</p><p>6, Academician Barbarash bulvar, Kemerovo, 650002,</p></bio><email xlink:type="simple">klyshnikovk@gmail.com</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-4405-8904</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Резвова</surname><given-names>М. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Rezvova</surname><given-names>M. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Резвова Мария Александровна, младший научный сотрудник, лаборатория новых биоматериалов</p><p>650002, Кемерово, бульвар имени академика Л.С. Барбараша, 6</p></bio><bio xml:lang="en"><p>Maria A. Rezvova, Junior Research Scientist, Laboratory of New Biomaterials</p><p>6, Academician Barbarash bulvar, Kemerovo, 650002,</p></bio><email xlink:type="simple">rezvovamaria@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/0000-0003-2404-2873</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Онищенко</surname><given-names>П. С.</given-names></name><name name-style="western" xml:lang="en"><surname>Onishchenko</surname><given-names>P. S.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Онищенко Павел Сергеевич, младший научный сотрудник, лаборатория новых биоматериалов</p><p>650002, Кемерово, бульвар имени академика Л.С. Барбараша, 6</p></bio><bio xml:lang="en"><p>Pavel S. Onishchenko, Junior Research Scientist, Laboratory of New Biomaterials</p><p>6, Academician Barbarash bulvar, Kemerovo, 650002,</p></bio><email xlink:type="simple">onis.pavel@gmail.com</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-7477-3979</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Овчаренко</surname><given-names>Е. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Ovcharenko</surname><given-names>E. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Овчаренко Евгений Андреевич, канд. техн. наук, заведующий лабораторией новых биоматериалов</p><p>650002, Кемерово, бульвар имени академика Л.С. Барбараша, 6</p></bio><bio xml:lang="en"><p>Evgeny A. Ovcharenko, Cand. Sci. (Tech.), Head of the Laboratory of New Biomaterials</p><p>6, Academician Barbarash bulvar, Kemerovo, 650002,</p></bio><email xlink:type="simple">ov.eugene@gmail.com</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Научно-исследовательский институт комплексных проблем сердечно-сосудистых заболеваний (НИИ КПССЗ)</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Research Institute for Complex Issues of Cardiovascular Diseases</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2024</year></pub-date><pub-date pub-type="epub"><day>10</day><month>07</month><year>2024</year></pub-date><volume>39</volume><issue>2</issue><fpage>175</fpage><lpage>182</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Костюнин А.Е., Глушкова Т.В., Асанов М.А., Акентьева Т.Н., Клышников К.Ю., Резвова М.А., Онищенко П.С., Овчаренко Е.А., 2024</copyright-statement><copyright-year>2024</copyright-year><copyright-holder xml:lang="ru">Костюнин А.Е., Глушкова Т.В., Асанов М.А., Акентьева Т.Н., Клышников К.Ю., Резвова М.А., Онищенко П.С., Овчаренко Е.А.</copyright-holder><copyright-holder xml:lang="en">Kostyunin A.E., Glushkova T.V., Asanov M.A., Akentyeva T.N., Klyshnikov K.Y., Rezvova M.A., Onishchenko P.S., Ovcharenko E.A.</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.sibjcem.ru/jour/article/view/2321">https://www.sibjcem.ru/jour/article/view/2321</self-uri><abstract><sec><title>Обоснование</title><p>Обоснование. Средняя долговечность биопротезов клапанов сердца ограничена 10–15 годами из-за структурной дегенерации их биологической составляющей. Одной из причин развития дегенеративных изменений в имплантатах является инфильтрация иммунными клетками. Как правило, воспаление развивается через несколько лет после биопротезирования, что плохо согласуется с гипотезой иммунного отторжения, вызванного остаточной иммунногенностью протезной биоткани. Мы предположили, что главным стимулом иммунного ответа на поздних сроках функционирования биопротезов становится их бессимптомная колонизация бактериальными агентами.</p></sec><sec><title>Цель</title><p>Цель: исследовать серию биопротезов, эксплантированных из-за структурной дегенерации, на предмет бактериальной инвазии; выявить закономерности в локализации микроорганизмов и клеточных инфильтратов.</p></sec><sec><title>Материал и методы</title><p>Материал и методы. Изучено 23 биопротеза клапанов сердца, иссеченных при репротезировании по причине структурной дегенерации. Детекцию бактерий в образцах осуществляли путем окрашивания гистологических срезов по Граму и посредством ПЦР-анализа. Для фенотипирования иммунных клеток применяли метод иммуногистохимического окрашивания с использованием антител к CD45 (пан-лейкоцитарный маркер), CD68 (маркер макрофагов), CD3 (маркер Т-лимфоцитов) и эластазе нейтрофилов (ELA2). Компонентный состав тканей исследовали с помощью пентахромного окрашивания по Расселу – Мовату. Анализ окрашенных срезов выполняли методом световой микроскопии. Результаты. Все исследованные биопротезы имели классические морфолого-гистологические признаки структурной дегенерации (наличие перфораций и макрокальцификатов в основании и куполе створок, разрывов в комиссуральной зоне), но не протезного эндокардита (вегетации отсутствовали, результаты посевов крови и смывов были отрицательными). С помощью гистологического метода бактерии обнаружены в 19 из 23 изученных клапанов (82,6%), тогда как данные ПЦР-анализа указали на присутствие бактерий в 11 (47,8%) имплантатах (Streptococcus ssp. и Staphylococcus ssp. без видовой идентификации). Отмечена солокализация колоний микроорганизмов и мелких клеточных инфильтратов, составленных макрофагами (CD45+, CD68+) и нейтрофилами (CD45+, ELA2+).</p></sec><sec><title>Заключение</title><p>Заключение. Бессимптомная бактериальная колонизация биопротезов клапанов сердца широко распространена и может провоцировать клеточную инфильтрацию этих медицинских изделий.</p></sec></abstract><trans-abstract xml:lang="en"><sec><title>Background</title><p>Background. The average lifespan of a bioprosthetic heart valves (BHVs) is limited to 10–15 years due to structural valve degeneration (SVD). One of the causes of SVD is the infiltration of immune cells. Inflammation like this usually develops several years after valve replacement, the cause of it remains unknown. Presumably, the main stimulus of the immune response is an asymptomatic colonization by bacterial agents.</p></sec><sec><title>Aim</title><p>Aim: To study bacterial invasion of BHVs explanted due to SVD, and to identify patterns in microorganism and cellular infiltrate localization.</p></sec><sec><title>Material and Methods</title><p>Material and Methods. 23 BHVs excised during replacement due to SVD were included in the study. The identification of bacteria in the samples was carried out by Gram staining and PCR analysis. Immunohistochemical staining with antibodies to markers CD45 (pan-leukocyte marker), CD68 (macrophage marker), CD3 (T-lymphocyte marker) and neutrophil elastase (ELA2) were used for phenotyping of immune cells. The composition of BHVs tissues was studied using Russell-Movat pentachrome staining.</p></sec><sec><title>Results</title><p>Results. All BHVs showed traditional signs of SVD (perforations and large calcifications at the base and dome of the leaflets, ruptures in the commissural zone), but had no signs of prosthetic valve endocarditis (no vegetation, blood culture and swab results were negative). Using the histological method, we detected bacterial cells in 19 of the 23 studied valves (82.6%), whereas PCR data indicated the presence of bacteria in 11 (47,8%) valves (Streptococcus ssp. and Staphylococcus ssp. without species identification). Moreover, we identified the co-localization of colonies of microorganisms and inflammatory infiltrates composed of macrophages (CD45+, CD68+) and neutrophils (CD45+, ELA2+).</p></sec><sec><title>Conclusion</title><p>Conclusion. Bacteria commonly cause asymptomatic colonization of BHVs which is strongly associated with inflammatory cell infiltration.</p></sec></trans-abstract><kwd-group xml:lang="ru"><kwd>биопротезы клапанов сердца</kwd><kwd>бактериальная инвазия</kwd><kwd>протезный эндокардит</kwd><kwd>структурная дегенерация клапана</kwd></kwd-group><kwd-group xml:lang="en"><kwd>bioprosthetic heart valves</kwd><kwd>bacterial colonization</kwd><kwd>prosthetic valve endocarditis</kwd><kwd>structural valve  degeneration</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">работа выполнена в рамках комплексной программы фундаментальных научных исследований СО РАН по фундаментальной теме НИИ КПССЗ № 0419-2022-0001 «Молекулярные, клеточные и биомеханические механизмы патогенеза сердечно-сосудистых заболеваний в разработке новых методов лечения заболеваний сердечно-сосудистой системы  на основе персонифицированной фармакотерапии, внедрения малоинвазивных медицинских изделий, биоматериалов и тканеинженерных имплантатов».</funding-statement><funding-statement xml:lang="en">the research was funded by the Complex Program of Basic Research under the Siberian  Branch of the Russian Academy of Sciences within the Basic Research Topic of Research  Institute for Complex Issues of Cardiovascular Diseases No. 0419-2022-0001 “Discovering  molecular, cellular and biomechanical mechanisms of cardiovascular diseases to develop novel  approaches for their treatment, including personalized pharmacotherapy, minimally invasive  surgery, composite biomaterials, and tissue-engineered cardiovascular implants”.</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">Otto C.M., Nishimura R.A., Bonow R.O., Carabello B.A., Erwin J.P., Gentile F. et al. 2020 ACC/AHA guideline for the management of patients with valvular heart disease: a report of the American College of Cardiology/American Heart Association Joint Committee on clinical practice guidelines. 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