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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">Doklady Biological Sciences</journal-id><journal-title-group><journal-title xml:lang="en">Doklady Biological Sciences</journal-title><trans-title-group xml:lang="ru"><trans-title>Доклады Российской академии наук. Науки о жизни</trans-title></trans-title-group></journal-title-group><issn publication-format="print">2686-7389</issn><issn publication-format="electronic">3034-5057</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">684060</article-id><article-id pub-id-type="doi">10.31857/S2686738925020136</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>Articles</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>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">The role of photobiomodulation therapy in reducing stress-induced changes in the hippocampus of rats during septoplasty modeling</article-title><trans-title-group xml:lang="ru"><trans-title>Роль фотобиомодулирующей терапии в уменьшении стресс-индуцированных изменений в гиппокампе у крыс после моделирования септопластики</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Kotov</surname><given-names>V. N.</given-names></name><name xml:lang="ru"><surname>Котов</surname><given-names>В. Н.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>fnkc.vladislav@gmail.com</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Kastyro</surname><given-names>I. V.</given-names></name><name xml:lang="ru"><surname>Кастыро</surname><given-names>И. В.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>fnkc.vladislav@gmail.com</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Ganshin</surname><given-names>I. B.</given-names></name><name xml:lang="ru"><surname>Ганьшин</surname><given-names>И. Б.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>fnkc.vladislav@gmail.com</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Popadyuk</surname><given-names>V. I.</given-names></name><name xml:lang="ru"><surname>Попадюк</surname><given-names>В. И.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>fnkc.vladislav@gmail.com</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Dragunova</surname><given-names>S. G.</given-names></name><name xml:lang="ru"><surname>Драгунова</surname><given-names>С. Г.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>fnkc.vladislav@gmail.com</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Khodorovich</surname><given-names>O. S.</given-names></name><name xml:lang="ru"><surname>Ходорович</surname><given-names>О. С.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>fnkc.vladislav@gmail.com</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Kartasheva</surname><given-names>А. F.</given-names></name><name xml:lang="ru"><surname>Карташева</surname><given-names>А. Ф.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>fnkc.vladislav@gmail.com</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Barannik</surname><given-names>M. I.</given-names></name><name xml:lang="ru"><surname>Баранник</surname><given-names>М. И.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>fnkc.vladislav@gmail.com</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Sarygin</surname><given-names>P. V.</given-names></name><name xml:lang="ru"><surname>Сарыгин</surname><given-names>П. В.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>fnkc.vladislav@gmail.com</email><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">P. Lumumba Peoples’ Friendship University of Russia</institution></aff><aff><institution xml:lang="ru">ФГАОУ ВО Российский Университет дружбы народов им. П. Лумумбы</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2025-04-15" publication-format="electronic"><day>15</day><month>04</month><year>2025</year></pub-date><volume>521</volume><issue>1</issue><issue-title xml:lang="en"/><issue-title xml:lang="ru"/><fpage>240</fpage><lpage>245</lpage><history><date date-type="received" iso-8601-date="2025-06-12"><day>12</day><month>06</month><year>2025</year></date><date date-type="accepted" iso-8601-date="2025-06-12"><day>12</day><month>06</month><year>2025</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2025, Russian Academy of Sciences</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2025, Российская академия наук</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="en">Russian Academy of Sciences</copyright-holder><copyright-holder xml:lang="ru">Российская академия наук</copyright-holder></permissions><self-uri xlink:href="https://journals.eco-vector.com/2686-7389/article/view/684060">https://journals.eco-vector.com/2686-7389/article/view/684060</self-uri><abstract xml:lang="en"><p>The aim of the study. To study the effect of photobiomodulation therapy (PBMT) on the amount of p53 in neurons of the pyramidal layer of the hippocampus after modeling septoplasty in rats. Materials and methods. Septoplasty was modeled in 48 Wistar rats. In the postoperative period, PBMT was administered to 24 rats in the early postoperative period for 2 to 6 days. Histological sections of the hippocampus were studied to determine p53-positive neurons on days 2, 4 and 6 after surgery in rats of both groups. Results. Compared with the control group (n=5 rats), in both experimental groups there was an increase in the number of p53-positive neurons in the hippocampus, however, in the group where PBMT was performed in the early postoperative period after modeling septoplasty, the number of such neurons was lower, and in some subfields of the hippocampus on day 6 it even corresponded to the control group. Conclusion. The use of PBMT in the early postoperative period after modeling septoplasty helps to reduce stress-induced expression of the p53 protein in the pyramidal layer of the hippocampus in rats.</p></abstract><trans-abstract xml:lang="ru"><p>Цель исследования. Изучение влияние фотобиомодулирующей терапии (ФБМТ) на количество р53 в нейронах пирамидного слоя гиппокампа после моделирования септопластики у крыс. Материалы и методы. У 48 крыс линии Wistar была смоделирована септопластика. В послеоперационном периоде 24 крысам в раннем послеоперационном периоде проводили ФБМТ длительностью от 2 до 6 суток. Было проведено иммуногистохимическое исследование (ИГХ) гистологических срезов гиппокампа с целью определения р53-позитивнх нейронов на 2, 4 и 6 сутки после операции крысам обеих групп. Результаты. По сравнению с контрольной группой (n=5 крыс) в обеих экспериментальных группах произошло увеличение количества р53-позитвных нейронов в гиппокампе (определенных методов ИГХ), однако в группе, где в раннем послеоперационном периоде после моделирования септопластики крысам выполняли ФБМТ, количество данных нейронов было ниже, а в некоторых субполях гиппокампа на 6 сутки даже соответствовало контрольной группе. Заключение. Применение ФБМТ в раннем послеоперационном периоде после моделирования септопластики способствует уменьшению стресс-индуцированной экспрессии белка р53 в пирамидном слое гиппокампа у крыс, тем самым снижая процессы нейродегенерации в данной зоне головного мозга.</p></trans-abstract><kwd-group xml:lang="en"><kwd>septoplasty</kwd><kwd>p53</kwd><kwd>neurons</kwd><kwd>photobiomodulation</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>септопластика</kwd><kwd>р53</kwd><kwd>нейроны</kwd><kwd>фотобиомодуляция</kwd></kwd-group><funding-group/></article-meta><fn-group><fn xml:lang="en"><p>Presented by Academician of the RAS I.V. Reshetov</p></fn><fn xml:lang="ru"><p>Представлено академиком РАН И.В. Решетовым</p></fn></fn-group></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Hassin O., Oren M. 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