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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">Acta Naturae</journal-id><journal-title-group><journal-title xml:lang="en">Acta Naturae</journal-title><trans-title-group xml:lang="ru"><trans-title>Acta Naturae</trans-title></trans-title-group></journal-title-group><issn publication-format="print">2075-8251</issn><publisher><publisher-name xml:lang="en">Acta Naturae Ltd</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">27440</article-id><article-id pub-id-type="doi">10.32607/actanaturae.27440</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>Research 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>Research Article</subject></subj-group></article-categories><title-group><article-title xml:lang="en">Dihydroquercetin-Loaded Liposomes Change Fibrous Tissue Distribution in the Bleomycin-Induced Fibrosis Model</article-title><trans-title-group xml:lang="ru"><trans-title>Дигидрокверцетин, инкапсулированный в липосомах, изменяет распределение фиброзной ткани в модели блеомицин-индуцированного фиброза</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Ivanov</surname><given-names>E. V.</given-names></name><name xml:lang="ru"><surname>Иванов</surname><given-names>Е. В.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Faculty of Medicine</p></bio><bio xml:lang="ru"><p>факультет фундаментальной медицины</p></bio><email>ivanovev102@yandex.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Akhmetshina</surname><given-names>M. R.</given-names></name><name xml:lang="ru"><surname>Ахметшина</surname><given-names>М. Р.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Faculty of Medicine</p></bio><bio xml:lang="ru"><p>факультет фундаментальной медицины</p></bio><email>ivanovev102@yandex.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Gizatulina</surname><given-names>A. R.</given-names></name><name xml:lang="ru"><surname>Гизатулина</surname><given-names>А. Р.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Faculty of Medicine</p></bio><bio xml:lang="ru"><p>факультет фундаментальной медицины</p></bio><email>ivanovev102@yandex.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Gulyaev</surname><given-names>M. V.</given-names></name><name xml:lang="ru"><surname>Гуляев</surname><given-names>М. В.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Faculty of Medicine</p></bio><bio xml:lang="ru"><p>факультет фундаментальной медицины</p></bio><email>ivanovev102@yandex.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Pavlova</surname><given-names>O. S.</given-names></name><name xml:lang="ru"><surname>Павлова</surname><given-names>О. С.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Faculty of Medicine</p></bio><bio xml:lang="ru"><p>факультет фундаментальной медицины</p></bio><email>ivanovev102@yandex.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Pirogov</surname><given-names>Y. A.</given-names></name><name xml:lang="ru"><surname>Пирогов</surname><given-names>Ю. А.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Faculty of Physics</p></bio><bio xml:lang="ru"><p>физический факультет</p></bio><email>ivanovev102@yandex.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Gavrilova</surname><given-names>S. A.</given-names></name><name xml:lang="ru"><surname>Гаврилова</surname><given-names>С. А.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Faculty of Medicine</p></bio><bio xml:lang="ru"><p>факультет фундаментальной медицины</p></bio><email>ivanovev102@yandex.ru</email><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Lomonosov Moscow State University</institution></aff><aff><institution xml:lang="ru">Московский государственный университет имени М.В. Ломоносова</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2024-08-21" publication-format="electronic"><day>21</day><month>08</month><year>2024</year></pub-date><volume>16</volume><issue>2</issue><issue-title xml:lang="en"/><issue-title xml:lang="ru"/><fpage>40</fpage><lpage>49</lpage><history><date date-type="received" iso-8601-date="2024-05-31"><day>31</day><month>05</month><year>2024</year></date><date date-type="accepted" iso-8601-date="2024-06-24"><day>24</day><month>06</month><year>2024</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2024, Ivanov E.V., Akhmetshina M.R., Gizatulina A.R., Gulyaev M.V., Pavlova O.S., Pirogov Y.A., Gavrilova S.A.</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2024, Иванов Е.В., Ахметшина М.Р., Гизатулина А.Р., Гуляев М.В., Павлова О.С., Пирогов Ю.А., Гаврилова С.А.</copyright-statement><copyright-year>2024</copyright-year><copyright-holder xml:lang="en">Ivanov E.V., Akhmetshina M.R., Gizatulina A.R., Gulyaev M.V., Pavlova O.S., Pirogov Y.A., Gavrilova S.A.</copyright-holder><copyright-holder xml:lang="ru">Иванов Е.В., Ахметшина М.Р., Гизатулина А.Р., Гуляев М.В., Павлова О.С., Пирогов Ю.А., Гаврилова С.А.</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://actanaturae.ru/2075-8251/article/view/27440">https://actanaturae.ru/2075-8251/article/view/27440</self-uri><abstract xml:lang="en"><p>The effects of the antioxidant dihydroquercetin (DHQ) were studied in a model of pulmonary fibrosis. DHQ penetration into the lesion was facilitated by encapsulation into liposomes. Pulmonary fibrosis was modeled in rats by intratracheal injection of bleomycin. For the first 7 days, the rats in the treatment group received a liposomal emulsion with DHQ, while in the comparator group rats received saline. In the control group, intact rats did not receive any exposure. Thirty days after the initiation, lung function and the pathological lesion volume were assessed by 7T 1H MRI and the lungs were taken for histologic examination. The proportion of fibrous tissue was counted by Masson’s trichrome staining. Both experimental groups were characterized by a significant functional pulmonary deficiency, with low mortality and a small lesion area. In the rats treated with DHQ, the distribution of fibrous tissue was significantly altered. Significantly more fibrous tissue was found in the center of the lesion, while significantly less was in the interstitial space of alveoli. Lung density at the same time was lower in the treated lungs. Dihydroquercetin encapsulated in liposomes affects the mechanisms of bleomycin-induced pulmonary fibrosis progression in rats. While accelerated fibrosis of the lesion can restrict inflammatory processes, delayed fibrosis of the interstitium can further improve the functional state of the lungs.</p></abstract><trans-abstract xml:lang="ru"><p>В модели легочного фиброза изучены эффекты антиоксиданта дигидрокверцетина, проникновение которого в очаг поражения было облегчено заключением в липосомы. Легочный фиброз моделировали у крыс введением блеомицина интратрахеально. Крысам одной экспериментальной группы в течение 7 дней вводили дигидрокверцетин в липосомах, в другой экспериментальной группе – соответствующее количество физиологического раствора. В третьей, контрольной группе интактные крысы не получали никакого воздействия. Через 30 суток исследовали размеры поражения и дыхательные объемы легких с помощью 7Т 1Н МРТ, легкие забирали для гистологического исследования. При окрашивании трихромом по Массону подсчитывали долю фиброзной ткани. Обе экспериментальные группы характеризовались значительным снижением функции легких, при низкой смертности и некрупном участке поражения. У крыс, получавших препарат, существенно изменилось распределение фиброзной ткани: значимо больше в центре очага поражения, значимо меньше в интерстициальном пространстве альвеол на фоне меньшей плотности легкого. Заключенный в липосомы дигидрокверцетин влияет на механизмы развития блеомицинового легочного фиброза у крыс. В то время как ускоренное фиброзирование очага поражения локализует воспаление, замедленное фиброзирование интерстиция может в дальнейшем улучшить функциональное состояние легких.</p></trans-abstract><kwd-group xml:lang="en"><kwd>dihydroquercetin</kwd><kwd>bleomycin</kwd><kwd>liposomes</kwd><kwd>antioxidants</kwd><kwd>pulmonary fibrosis</kwd><kwd>1H MRI</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>дигидрокверцетин</kwd><kwd>липосомы</kwd><kwd>блеомицин</kwd><kwd>антиоксиданты</kwd><kwd>легочный фиброз</kwd><kwd>1H МРТ</kwd></kwd-group><funding-group><award-group><funding-source><institution-wrap><institution xml:lang="ru">РНФ</institution></institution-wrap><institution-wrap><institution xml:lang="en">Russian Science Foundation</institution></institution-wrap></funding-source><award-id>21-75-10038</award-id></award-group></funding-group></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Walters D.M., Cho H.Y., Kleeberger S.R. // Antioxid. 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