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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="other" dtd-version="1.2" xml:lang="en"><front><journal-meta><journal-id journal-id-type="publisher-id">Russian Journal of Physiology</journal-id><journal-title-group><journal-title xml:lang="en">Russian Journal of Physiology</journal-title><trans-title-group xml:lang="ru"><trans-title>Российский физиологический журнал им. И.М. Сеченова</trans-title></trans-title-group></journal-title-group><issn publication-format="print">0869-8139</issn><issn publication-format="electronic">2658-655X</issn><publisher><publisher-name xml:lang="en">The Russian Academy of Sciences</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">651552</article-id><article-id pub-id-type="doi">10.31857/S0869813923070087</article-id><article-id pub-id-type="edn">XIVOIO</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>EXPERIMENTAL ARTICLES</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>ЭКСПЕРИМЕНТАЛЬНЫЕ СТАТЬИ</subject></subj-group><subj-group subj-group-type="article-type"><subject></subject></subj-group></article-categories><title-group><article-title xml:lang="en">Fibrin Coating Contributes to the Retention of the Endothelial Layer in Pulsating Flow</article-title><trans-title-group xml:lang="ru"><trans-title>Фибриновое покрытие способствует сохранению эндотелиального слоя в условиях пульсирующего потока</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Matveeva</surname><given-names>V. G.</given-names></name><name xml:lang="ru"><surname>Матвеева</surname><given-names>В. Г.</given-names></name></name-alternatives><email>matveeva_vg@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Velikanova</surname><given-names>E. A.</given-names></name><name xml:lang="ru"><surname>Великанова</surname><given-names>Е. А.</given-names></name></name-alternatives><email>matveeva_vg@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Antonova</surname><given-names>L. V.</given-names></name><name xml:lang="ru"><surname>Антонова</surname><given-names>Л. В.</given-names></name></name-alternatives><email>matveeva_vg@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Barbarash</surname><given-names>L. S.</given-names></name><name xml:lang="ru"><surname>Барбараш</surname><given-names>Л. С.</given-names></name></name-alternatives><email>matveeva_vg@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Research Institute of Complex Issues of Cardiovascular Diseases</institution></aff><aff><institution xml:lang="ru">Научно-исследовательский институт Комплексных проблем сердечно-сосудистых заболеваний</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2023-07-01" publication-format="electronic"><day>01</day><month>07</month><year>2023</year></pub-date><volume>109</volume><issue>7</issue><fpage>975</fpage><lpage>989</lpage><history><date date-type="received" iso-8601-date="2025-02-01"><day>01</day><month>02</month><year>2025</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2023, В.Г. Матвеева, Е.А. Великанова, Л.В. Антонова, Л.С. Барбараш</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2023, В.Г. Матвеева, Е.А. Великанова, Л.В. Антонова, Л.С. Барбараш</copyright-statement><copyright-year>2023</copyright-year><copyright-holder xml:lang="en">В.Г. Матвеева, Е.А. Великанова, Л.В. Антонова, Л.С. Барбараш</copyright-holder><copyright-holder xml:lang="ru">В.Г. Матвеева, Е.А. Великанова, Л.В. Антонова, Л.С. Барбараш</copyright-holder></permissions><self-uri xlink:href="https://journals.eco-vector.com/0869-8139/article/view/651552">https://journals.eco-vector.com/0869-8139/article/view/651552</self-uri><abstract xml:lang="en"><p id="idm45181323889200">The presence of a modifying coating based on extracellular matrix proteins on the inner surface of vascular prostheses is known to enhance endothelial cell adhesion and prevent detachment under pulsating flow conditions. This coating effectively reduces the risk of thrombosis and plays a critical role in determining implantation outcomes. Although proteins like collagen, fibrin, and fibrinogen are commonly used as coatings to improve cell adhesion, their relative effectiveness remains uncertain. Objective: This study aims to identify the optimal coating, based on extracellular matrix proteins, that preserves prosthesis functionality and maintains endothelial layer integrity under pulsating flow conditions. Methods: Scaffolds and vascular prostheses were fabricated using poly(3-hydroxybutyrate-co-3-hydroxyvalerate) and poly(ε-caprolactonone) through an electrospinning process. These structures were then modified with collagen I, fibronectin, or fibrin. Endothelial colony-forming cells (ECFCs) were seeded onto the protein-modified electrospun samples and cultured under both static and dynamic conditions. After a 3-day incubation period under static conditions, cell viability, metabolic and proliferative activity, as well as adhesive properties, were evaluated. Adhesive properties were assessed by analyzing the area occupied by the focal adhesion protein paxillin. Cell retention was determined by comparing cell density on the inner surface of 4 mm diameter vascular prostheses after a 7-day incubation period, both under pulsating flow conditions and static conditions. Results: Cell metabolic activity, viability, number, proliferation, and the area occupied by the focal adhesion protein paxillin were found to be significantly higher in samples coated with fibrin compared to those coated with collagen I and fibrinogen. The cell density (cells/cm<sup>2</sup>) of ECFCs on the inner surface of fibrin-coated prostheses showed no significant difference between dynamic and static conditions. In contrast, collagen and fibronectin coatings resulted in approximately half the cell density under pulsating flow conditions compared to static conditions. Conclusion: The fibrin coating demonstrated superior biological activity, adhesive properties, and preservation of the endothelial layer under both static and pulsating flow conditions, as compared to collagen I and fibronectin coatings. Consequently, the utilization of fibrin coating emerges as a promising option for modifying the inner surface of vascular prostheses.</p></abstract><trans-abstract xml:lang="ru"><p id="idm45181323883888">Разработки протезов сосудов малого диаметра показали, что модифицирующее покрытие, сохраняющее эндотелиальный слой в условиях пульсирующего потока, препятствует тромбообразованию и определяет исход имплантации. Для улучшения адгезии эндотелиальных клеток в качестве покрытия используют различные белки внеклеточного матрикса (коллаген, фибронектин, фибрин), которые требуют сравнения. Цель работы заключалась в поиске наиболее эффективного покрытия белками внеклеточного матрикса, поддерживающего биологическую функциональность и сохраняющего эндотелиальный слой в условиях пульсирующего потока. Методы исследования: матрицы и графты изготавливали из поли(3-гидроксибутирата-ко-3-гидроксивалерата) и поли(ε-капролактонона) методом электроспиннинга, модифицировали коллагеном 1-го типа, фибронектином и фибрином. Образцы заселяли культурой колониеформирующих эндотелиальных клеток (КФЭК). Выполнено два блока исследований: в статике и в динамике. В статических условиях, после 3 дней инкубации КФЭК на поверхности образцов, изучали их биологические характеристики: жизнеспособность, метаболическую и пролиферативную активность клеток, адгезионные свойства по площади, занимаемой белком фокальной адгезии паксиллином. Удержание клеток оценивали сравнением плотности клеток на внутренней поверхности сосудистых графтов диаметром 4 мм в условиях пульсирующего потока и в статике через 7 суток инкубации. Было найдено, что в статических условиях метаболическая активность, жизнеспособность, количество и пролиферативная активность КФЭК, а также площадь, занимаемая белком фокальной адгезии паксиллином, на матрицах, покрытых фибрином, были выше, чем на коллагене и фибронектине. Плотность КФЭК (кл/мм<sup>2</sup>) на внутренней поверхности графтов с фибриновым покрытием не различалась в статических и динамических условиях. На образцах с коллагеном и фибронектином в условиях пульсирующего потока плотность клеток была в 2 раза меньше, чем при статической инкубации. Заключение. Фибрин продемонстрировал высокую биологическую активность, адгезионные свойства и сохранение эндотелиального слоя в статике и в условиях пульсирующего потока по сравнению с коллагеном и фибронектином. Покрытие фибрином является вариантом выбора при модифицировании внутренней поверхности сосудистых протезов.</p></trans-abstract><kwd-group xml:lang="en"><kwd>fibrin</kwd><kwd>coating</kwd><kwd>vascular prostheses</kwd><kwd>pulsating flow</kwd><kwd>cell retention</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>фибрин</kwd><kwd>покрытие</kwd><kwd>сосудистые протезы</kwd><kwd>пульсирующий поток</kwd><kwd>удержание клеток</kwd></kwd-group></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Fang S, Ellman DG, Andersen DC (2021) Review: Tissue Engineering of Small-Diameter Vascular Grafts and Their In Vivo Evaluation in Large Animals and Humans. 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