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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">sibmed</journal-id><journal-title-group><journal-title xml:lang="ru">Сибирский научный медицинский журнал</journal-title><trans-title-group xml:lang="en"><trans-title>Сибирский научный медицинский журнал</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2410-2512</issn><issn pub-type="epub">2410-2520</issn><publisher><publisher-name>ИЦиГ СО РАН</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.18699/SSMJ20250413</article-id><article-id custom-type="elpub" pub-id-type="custom">sibmed-2346</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>МЕДИКО-БИОЛОГИЧЕСКИЕ НАУКИ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>BIOMEDICINE</subject></subj-group></article-categories><title-group><article-title>Эффективность рекомбинантного ангиогенина человека в терапии термического ожога кожи мышей линии CD-1</article-title><trans-title-group xml:lang="en"><trans-title>Efficacy of the human recombinant angiogenin in CD-1 mice skin burn wound therapy</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-4897-8676</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Лыков</surname><given-names>А. П.</given-names></name><name name-style="western" xml:lang="en"><surname>Lykov</surname><given-names>A. P.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Лыков Александр Петрович, д.м.н.</p><p>630060, г. Новосибирск, ул. Тимакова, 2</p></bio><bio xml:lang="en"><p>Alexandr P. Lykov, doctor of medical sciences</p><p>630060, Novosibirsk, Timakova st., 2</p></bio><email xlink:type="simple">aplykov2@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/0000-0002-0249-3043</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Горячкин</surname><given-names>А. М.</given-names></name><name name-style="western" xml:lang="en"><surname>Goryaсhkin</surname><given-names>A. M.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Горячкин Александр Михайлович</p><p>630091, г. Новосибирск, Красный пр., 52</p></bio><bio xml:lang="en"><p>Alexandr M. Goryachkin</p><p>630091, Novosibirsk, Krasny ave., 52</p></bio><email xlink:type="simple">goryachkin.a@inbox.ru</email><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Пуртов</surname><given-names>А. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Purtov</surname><given-names>A. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Пуртов Алексей Анатольевич</p><p>630559, Новосибирская обл., р.п. Кольцово, пр. Академика Сандахчиева, 13</p></bio><bio xml:lang="en"><p>Alexei A. Purtov</p><p>630559, Novosibirsk region, Koltsovo, Akademika Sandakhchieva ave., 13</p><p> </p></bio><email xlink:type="simple">Purtov.alexey@gmail.com</email><xref ref-type="aff" rid="aff-3"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0009-0009-7649-029X</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Дровосеков</surname><given-names>М. Н.</given-names></name><name name-style="western" xml:lang="en"><surname>Drovosekov</surname><given-names>M. N.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Дровосеков Михаил Николаевич, д.м.н.</p><p>630091, г. Новосибирск, Красный пр., 52</p></bio><bio xml:lang="en"><p>Mikhail N. Drovosekov, doctor of medical sciences</p><p>630091, Novosibirsk, Krasny ave., 52</p></bio><email xlink:type="simple">dmn78@mail.ru</email><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-7933-8394</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Агеева</surname><given-names>Т. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Ageeva</surname><given-names>T. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Агеева Татьяна Августовна, д.м.н., проф.</p><p>630091, г. Новосибирск, Красный пр., 52</p></bio><bio xml:lang="en"><p>Tatyana A. Ageeva, doctor of medical sciences, professor</p><p>630091, Novosibirsk, Krasny ave., 52</p></bio><email xlink:type="simple">ageta@mail.ru</email><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-0400-1011</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Надеев</surname><given-names>А. П.</given-names></name><name name-style="western" xml:lang="en"><surname>Nadeev</surname><given-names>A. P.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Надеев Александр Петрович, д.м.н., проф.</p><p>630091, г. Новосибирск, Красный пр., 52</p></bio><bio xml:lang="en"><p>Alexandr P. Nadeev, doctor of medical sciences, professor</p><p>630091, Novosibirsk, Krasny ave., 52</p></bio><email xlink:type="simple">nadeevngma@mail.ru</email><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-6907-8629</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Юрина</surname><given-names>Н. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Yurina</surname><given-names>N. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Юрина Наталья Владимировна</p><p>630091, г. Новосибирск, Красный пр., 52</p></bio><bio xml:lang="en"><p>Natalya V. Yurina</p><p>630091, Novosibirsk, Krasny ave., 52</p></bio><email xlink:type="simple">yurina_nat@mail.ru</email><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-0496-9401</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Жураковский</surname><given-names>И. П.</given-names></name><name name-style="western" xml:lang="en"><surname>Zhurakovsky</surname><given-names>I. P.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Жураковский Игорь Павлович, д.м.н.</p><p>630091, г. Новосибирск, Красный пр., 52</p></bio><bio xml:lang="en"><p>Igor P. Zhurakovsky, doctor of medical sciencess</p><p>630091, Novosibirsk, Krasny ave., 52</p></bio><email xlink:type="simple">murash2003@yandex.ru</email><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-9956-0056</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Повещенко</surname><given-names>О. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Poveshchenko</surname><given-names>O. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Повещенко Ольга Владимировна, д.м.н.</p><p>630060, г. Новосибирск, ул. Тимакова, 2</p></bio><bio xml:lang="en"><p>Olga V. Poveshchenko, doctor of medical sciences</p><p>630060, Novosibirsk, Timakova st., 2</p></bio><email xlink:type="simple">poveschenkoov@yandex.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>НИИ клинической и экспериментальной лимфологии – филиал ФИЦ Институт цитологии и генетики СО РАН</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Research Institute of Clinical and Experimental Lymphology – Branch of the Federal Research Center Institute of Cytology and Genetics of SB RAS</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Новосибирский государственный медицинский университет Минздрава России</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Novosibirsk State Medical University of Minzdrav of Russia</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-3"><aff xml:lang="ru"><institution>ООО «Лаборатория Ангиофарм»</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Angiofarm Laboratory” LLC</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2025</year></pub-date><pub-date pub-type="epub"><day>05</day><month>09</month><year>2025</year></pub-date><volume>45</volume><issue>4</issue><fpage>124</fpage><lpage>133</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Лыков А.П., Горячкин А.М., Пуртов А.А., Дровосеков М.Н., Агеева Т.А., Надеев А.П., Юрина Н.В., Жураковский И.П., Повещенко О.В., 2025</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="ru">Лыков А.П., Горячкин А.М., Пуртов А.А., Дровосеков М.Н., Агеева Т.А., Надеев А.П., Юрина Н.В., Жураковский И.П., Повещенко О.В.</copyright-holder><copyright-holder xml:lang="en">Lykov A.P., Goryaсhkin A.M., Purtov A.A., Drovosekov M.N., Ageeva T.A., Nadeev A.P., Yurina N.V., Zhurakovsky I.P., Poveshchenko O.V.</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://sibmed.elpub.ru/jour/article/view/2346">https://sibmed.elpub.ru/jour/article/view/2346</self-uri><abstract><p>Заживление ожоговой раны кожи – это длительный и комплексный процесс, в котором активную роль играют как клеточные элементы самой кожи, так и биологически активные молекулы, включая цитокины. Одной из таких молекул является ангиогенин, представляющий собой рибонуклеазу, которая способствует формированию сосудистой сети в области повреждения органов и тканей. Целью исследования стало сравнительное изучение эффекта внутрикожного введения рекомбинатного ангиогенина человека, кондиционированных сред от мезенхимных стволовых клеток костного мозга человека, клеток эндотелиальной линии EA.Hy926 и клеток линии фибробластов кожи человека при термическом ожоге кожи у самок мышей линии CD-1.</p><sec><title>Материал и методы</title><p>Материал и методы. Термический ожог кожи в области спины инициировали прижиганием металлической пластиной, нагретой над пламенем спиртовки до 200–250 °С. Лечение начинали сразу же после инициации ожоговой раны. Рекомбинантный ангиогенин человека (1 мл раствора, содержащего 10 мкг действующего агента) вводили одно-, двухи трехкратно с интервалом 7 суток, кондиционированные среды от соматических клеток человека (1 мл) ‒ однократно. На 7-е, 14-е и 21-е сутки измеряли размер раны штангенциркулем, после выведения животных из эксперимента забирали кровь и фрагмент кожи с ожоговой раной. В сыворотке крови и экстракте образцов кожи определяли уровень цитокинов (IL-1β, TNFα, IL-10, VEGF) и NO спектрофотометрически. При гистологическом анализе образцов кожи оценивали плоский эпителий, грануляционную ткань, количество кровеносных сосудов, лимфоцитов, макрофагов, нейтрофилов, плазмоцитов и фибробластов.</p><p>Результаты и их обсуждение. В группах мышей с термическим ожогом, получавших лечение рекомбинантным ангиогенином человека или кондиционированными средами от соматических клеток человека, выявлено значимое ускорение заживления раневого дефекта кожи. Эффективность однократного введения рекомбинантного ангиогенина человека сопоставима с эффективностью кондиционированной среды от мезенхимных стволовых клеток костного мозга человека. Лечение рекомбинантным ангиогенином человека и кондиционированными средами от соматических клеток человека способствовало эпителизации раневого дефекта, формированию грануляционной ткани и усилению ангиогенеза раневого дефекта. Показано, что уровни цитокинов и NO в сыворотке крови и коже меняются в зависимости как от вида лечения, так и от срока наблюдений. Между данными параметрами и морфометрическими показателями образцов кожи из области ожога выявлены корреляционные связи.</p></sec><sec><title>Заключение</title><p>Заключение. Инъекции биомедицинского клеточного продукта в область термического ожога кожи у самок мышей линии CD-1 ускоряют заживление раневого дефекта.</p></sec></abstract><trans-abstract xml:lang="en"><p>Both the skin's own cellular components and physiologically active substances, such as cytokines, actively participate in the protracted and intricate process of skin burn wound healing. One of these molecules is angiogenin, a ribonuclease that encourages the development of a vascular network where tissue and organ damage has occurred. The study compared the effects of intradermal delivery of human skin fibroblast cells, EA.Hy926 endothelial cells, conditioned media from human bone marrow mesenchymal stem cells, and human recombinant angiogenin after thermal skin burn in female CD-1 mice.</p><sec><title>Material and methods</title><p>Material and methods. Using a metal plate heated to 200–250 °C over the flame, a thermal skin burn in the back area was initiated. Treatment was started immediately after the initiation of the burn wound. Recombinant human angiogenin (1 ml of solution containing 10 μg of active agent) was administered once, twice, and three times with an interval of 7 days; conditioned media from human somatic cells (1 ml) were administered once. A caliper was used to measure the size of the wound on days 7, 14, and 21. Blood and a piece of skin from the burn wound were collected when the animals were removed from the experiment. Using spectrophotometry, the amounts of NO and cytokines (IL-1β, TNFα, IL-10, and VEGF) in blood serum and extract of skin samples were measured. The squamous epithelium, granulation tissue, blood vessel count, lymphocytes, neutrophils, macrophages, plasmocytes, and fibroblasts were all evaluated by histological analysis of skin samples.</p></sec><sec><title>Results and discussion</title><p>Results and discussion. Human recombinant angiogenin or conditioned media derived from human somatic cells significantly accelerated the repair of wound skin defects in groups of mice with thermal burns. A conditioned media derived from human bone marrow mesenchymal stem cells is as effective as a single injection of human recombinant angiogenin. The wound defect's epithelialization, granulation tissue development, and increased angiogenesis were all facilitated by treatment with human recombinant angiogenin and conditioned media derived from human somatic cells. It has been demonstrated that variations in cytokine and NO levels in blood serum and skin occur depending on the type of treatment and the length of observation. The morphometric characteristics of skin samples taken from the burn site were found to correlate with these parameters.</p></sec><sec><title>Conclusions</title><p>Conclusions. Injections of the biomedical cell product into the area of thermal skin burns in female CD-1 mice accelerate wound defect healing.</p></sec></trans-abstract><kwd-group xml:lang="ru"><kwd>рекомбинантный ангиогенин человека</kwd><kwd>кондиционированные среды</kwd><kwd>термический ожог кожи</kwd></kwd-group><kwd-group xml:lang="en"><kwd>recombinant human angiogenin</kwd><kwd>conditioned media</kwd><kwd>thermal skin burn</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Работа выполнена в рамках государственного задания НИИ клинической и экспериментальной лимфологии – филиала ФИЦ Институт цитологии и генетики СО РАН, регистрационный № FWNR2025-0016, № 121030300149-0</funding-statement><funding-statement xml:lang="en">The work was carried out within the framework of the state assignment of the Research Institute of Clinical and Experimental Lymphology a branch of the Federal Research Center Institute of Cytology and Genetics of the Siberian Branch of the Russian Academy of Sciences, registration No. FWNR-2025-0016, No. 121030300149-0</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">Markiewicz-Gospodarek A., Kozioł M., Tobiasz M., Baj J., Radzikowska-Büchner E., Przekora A. Burn wound healing: clinical complications, cedical care, treatment, and dressing types: the current state of knowledge for clinical practice. Int. J. Environ. Res. Public Health. 2022;19(3):1338. doi: 10.3390/ijerph19031338</mixed-citation><mixed-citation xml:lang="en">Markiewicz-Gospodarek A., Kozioł M., Tobiasz M., Baj J., Radzikowska-Büchner E., Przekora A. Burn wound healing: clinical complications, cedical care, treatment, and dressing types: the current state of knowledge for clinical practice. Int. J. Environ. Res. Public Health. 2022;19(3):1338. doi: 10.3390/ijerph19031338</mixed-citation></citation-alternatives></ref><ref id="cit2"><label>2</label><citation-alternatives><mixed-citation xml:lang="ru">Ullah S., Mansoor S., Ayub A., Ejaz M., Zafar H., Feroz F., Khan A., Ali M. An update on stem cells applications in burn wound healing. Tissue Cell. 2021;72:101527. doi: 10.1016/j.tice.2021.101527</mixed-citation><mixed-citation xml:lang="en">Ullah S., Mansoor S., Ayub A., Ejaz M., Zafar H., Feroz F., Khan A., Ali M. An update on stem cells applications in burn wound healing. Tissue Cell. 2021;72:101527. doi: 10.1016/j.tice.2021.101527</mixed-citation></citation-alternatives></ref><ref id="cit3"><label>3</label><citation-alternatives><mixed-citation xml:lang="ru">Zheng W., Zhao D.L., Zhao Y.Q., Li Z.Y. Effectiveness of platelet rich plasma in burn wound healing: a systematic review and meta-analysis. J. Dermatolog. Treat. 2022:33(1):131–137. doi: 10.1080/09546634.2020.1729949</mixed-citation><mixed-citation xml:lang="en">Zheng W., Zhao D.L., Zhao Y.Q., Li Z.Y. Effectiveness of platelet rich plasma in burn wound healing: a systematic review and meta-analysis. J. Dermatolog. Treat. 2022:33(1):131–137. doi: 10.1080/09546634.2020.1729949</mixed-citation></citation-alternatives></ref><ref id="cit4"><label>4</label><citation-alternatives><mixed-citation xml:lang="ru">Singh K., Maity P., Koroma A.K., Basu A., Pandey R.K., Vander Beken S., Haas P., Krug L., Hainzl A., Sindrilaru A., … Scharffetter-Kochanek K. Angiogenin released from ABCB5+stromal precursors improves healing of diabetic wounds by promoting angiogenesis. J. Invest. Dermatol. 2022:142(6):1725–1736.e10. doi: 10.1016/j.jid.2021.10.026</mixed-citation><mixed-citation xml:lang="en">Singh K., Maity P., Koroma A.K., Basu A., Pandey R.K., Vander Beken S., Haas P., Krug L., Hainzl A., Sindrilaru A., … Scharffetter-Kochanek K. Angiogenin released from ABCB5+stromal precursors improves healing of diabetic wounds by promoting angiogenesis. J. Invest. Dermatol. 2022:142(6):1725–1736.e10. doi: 10.1016/j.jid.2021.10.026</mixed-citation></citation-alternatives></ref><ref id="cit5"><label>5</label><citation-alternatives><mixed-citation xml:lang="ru">Shpichka A., Butnaru D., Bezrukov E.A., Sukhanov R.B., Atala A., Burdukovskii V., Zhang Y., Timashev P. Skin tissue regeneration for burn injury. Stem Cell Res. Ther. 2019:10(1): 94. doi: 10.1186/s13287-019-1203-3</mixed-citation><mixed-citation xml:lang="en">Shpichka A., Butnaru D., Bezrukov E.A., Sukhanov R.B., Atala A., Burdukovskii V., Zhang Y., Timashev P. Skin tissue regeneration for burn injury. Stem Cell Res. Ther. 2019:10(1): 94. doi: 10.1186/s13287-019-1203-3</mixed-citation></citation-alternatives></ref><ref id="cit6"><label>6</label><citation-alternatives><mixed-citation xml:lang="ru">Kim J.H., Green D.S., Ju Y.M., Harrison M., Vaughan J.W., Atala A., Lee S.J., Jackson J.D., Nykiforuk C., Yoo J.J. Identification and characterization of stem cell secretome-based recombinant proteins for wound healing applications. Front. Bioeng. Biotechnol. 2022;10:954682. doi: 10.3389/fbioe.2022.954682</mixed-citation><mixed-citation xml:lang="en">Kim J.H., Green D.S., Ju Y.M., Harrison M., Vaughan J.W., Atala A., Lee S.J., Jackson J.D., Nykiforuk C., Yoo J.J. Identification and characterization of stem cell secretome-based recombinant proteins for wound healing applications. Front. Bioeng. Biotechnol. 2022;10:954682. doi: 10.3389/fbioe.2022.954682</mixed-citation></citation-alternatives></ref><ref id="cit7"><label>7</label><citation-alternatives><mixed-citation xml:lang="ru">Subramaniam T., Shaiful Hadi N., Sulaiman S., Fauzi M.B., Hj Idrus R.B., Chowdhury S.R., Law J.X., Maarof M. Comparison of three different skin substitutes in promoting wound healing in an ovine model. Burns. 2022;48(5):1198–1208. doi: 10.1016/j.burns.2021.08.012</mixed-citation><mixed-citation xml:lang="en">Subramaniam T., Shaiful Hadi N., Sulaiman S., Fauzi M.B., Hj Idrus R.B., Chowdhury S.R., Law J.X., Maarof M. Comparison of three different skin substitutes in promoting wound healing in an ovine model. Burns. 2022;48(5):1198–1208. doi: 10.1016/j.burns.2021.08.012</mixed-citation></citation-alternatives></ref><ref id="cit8"><label>8</label><citation-alternatives><mixed-citation xml:lang="ru">Pan S.C., Lee C.H., Chen C.L., Fang W.Y., Wu L.W. Angiogenin attenuates scar formation in burn patients by reducing fibroblast proliferation and transforming growth factor β1 secretion. Ann. Plast. Surg. 2018;80(2S, Suppl. 1):S79–S83. doi: 10.1097/SAP.0000000000001306</mixed-citation><mixed-citation xml:lang="en">Pan S.C., Lee C.H., Chen C.L., Fang W.Y., Wu L.W. Angiogenin attenuates scar formation in burn patients by reducing fibroblast proliferation and transforming growth factor β1 secretion. Ann. Plast. Surg. 2018;80(2S, Suppl. 1):S79–S83. doi: 10.1097/SAP.0000000000001306</mixed-citation></citation-alternatives></ref></ref-list><fn-group><fn fn-type="conflict"><p>The authors declare that there are no conflicts of interest present.</p></fn></fn-group></back></article>
