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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">actabiomedica</journal-id><journal-title-group><journal-title xml:lang="ru">Acta Biomedica Scientifica</journal-title><trans-title-group xml:lang="en"><trans-title>Acta Biomedica Scientifica</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2541-9420</issn><issn pub-type="epub">2587-9596</issn><publisher><publisher-name>Scientific Centre for Family Health and Human Reproduction Problems</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.29413/ABS.2024-9.4.23</article-id><article-id custom-type="elpub" pub-id-type="custom">actabiomedica-4964</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 RESEARCHES</subject></subj-group></article-categories><title-group><article-title>Иммунные клетки и метаболизм триптофана в ткани суставной сумки при ревматоидном артрите</article-title><trans-title-group xml:lang="en"><trans-title>Immune cells and tryptophan metabolism in the joint capsule tissue in rheumatoid arthritis</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0009-0002-4882-5776</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Степанов</surname><given-names>Е. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Stepanov</surname><given-names>E. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Степанов Евгений Александрович – аспирант кафедры патологической физиологии</p><p>672000, г. Чита, ул. Горького, 39а</p></bio><bio xml:lang="en"><p>Evgenii A. Stepanov – Postgraduate at the Department of Pathological Physiology</p><p>Gorkogo str. 39A, Chita 672000</p></bio><email xlink:type="simple">eugen3-stepanov@ya.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>ФГБОУ ВО «Читинская государственная медицинская академия» Минздрава России</institution></aff><aff xml:lang="en"><institution>Chita State Medical Academy</institution></aff></aff-alternatives><pub-date pub-type="collection"><year>2024</year></pub-date><pub-date pub-type="epub"><day>28</day><month>09</month><year>2024</year></pub-date><volume>9</volume><issue>4</issue><fpage>215</fpage><lpage>220</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Степанов Е.А., 2024</copyright-statement><copyright-year>2024</copyright-year><copyright-holder xml:lang="ru">Степанов Е.А.</copyright-holder><copyright-holder xml:lang="en">Stepanov 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.actabiomedica.ru/jour/article/view/4964">https://www.actabiomedica.ru/jour/article/view/4964</self-uri><abstract><p>До настоящего времени остаются невыясненными многие звенья патогенеза ревматоидного артрита, что приводит к неудовлетворительным показателям при его терапии.</p><sec><title>Цель исследования</title><p>Цель исследования. Изучение клеток, участвующих в иммунных реакциях, и метаболитов триптофана в суставной сумке при ревматоидном артрите.</p></sec><sec><title>Материалы и методы</title><p>Материалы и методы. Опыты были проведены на 40 крысах линии Wistar. Ревматоидный артрит вызывали внутрибрюшинной инъекцией раствора коллагена 2-го типа (Chondrex Inc., США) в неполном адъюванте Фрейнда. На 7-е, 14-е и 21-е сутки в суставной сумке определяли содержание триптофана, кинуренина, 3-гидрокенуринина, L-5-гидротриптофана методом высокоэффективной жидкостной хроматографии. Клетки с CD3, CD20 и CD68 в тканях сустава исследовали в эти же сроки стрептавидин-биотин-пероксидазным методом. Для определения антител к цитруллин-содержащему пептиду использовали иммуноферментный метод. Статистический анализ проводили с помощью программы Jamovi, версия 2.3.</p></sec><sec><title>Результаты</title><p>Результаты. Содержание в суставе клеток, несущих маркеры CD3, CD20 и CD68, было высоким при экспериментальном ревматоидном артрите. В тканях сустава также повышается содержание метаболитов триптофана по кинурениновому пути и снижается концентрация метаболитов по серотониновому пути. Установлены прямые положительные корреляционные связи клеток с дифференциальными кластерами CD3, CD20 и CD68 с содержанием метаболитов триптофана по кинурениновому пути и отрицательные – с метаболитами серотонинового пути.</p></sec><sec><title>Выводы</title><p>Выводы. Клетки, несущие маркеры CD3, CD20 и CD68 и метаболиты триптофана – кинуренин и L-5-гидротриптофан, играют важную роль в патогенезе ревматоидного артрита.</p></sec></abstract><trans-abstract xml:lang="en"><p>To the present day, many links in the pathogenesis of rheumatoid arthritis remain unclear, which leads to unsatisfactory results in its therapy.</p><sec><title>The aim</title><p>The aim. To study the cells involved in immune reactions and tryptophan metabolites in the joint capsule in rheumatoid arthritis.</p></sec><sec><title>Materials and methods</title><p>Materials and methods. The experiments were carried out on 40 Wistar rats. Rheumatoid arthritis was induced by intraperitoneal injection of a solution of type 2 collagen (Chondrex Inc., USA) in incomplete Freund’s adjuvant. On the days 7, 14 and 21, the content of tryptophan, kynurenine, 3-hydrokenurinine, L-5-hydrotryptophan in the joint capsule was determined using high-performance liquid chromatography. Cells with CD3, CD20 and CD68 in joint tissues were studied at the same time using the streptavidin-biotin-peroxidase method. We used enzyme-linked immunosorbent method to determine antibodies to citrulline-containing peptide. Statistical analysis was performed using the Jamovi, version 2.3 software.</p></sec><sec><title>Results</title><p>Results. The content of cells carrying CD3, CD20 and CD68 markers in the joint was high in experimental rheumatoid arthritis. In joint tissues, the content of tryptophan metabolites along the kynurenine pathway also increases and the concentration of metabolites along the serotonin pathway decreases. Direct positive correlations of cells carrying CD3, CD20 and CD68 differential clusters with the content of tryptophan metabolites along the kynurenine pathway and negative correlations with metabolites of the serotonin pathway were established.</p></sec><sec><title>Conclusions</title><p>Conclusions. Cells carrying CD3, CD20 and CD68 markers and tryptophan metabolites – kynurenine and L-5-hydrotryptophan – play an important role in the pathogenesis of rheumatoid arthritis.</p></sec></trans-abstract><kwd-group xml:lang="ru"><kwd>ревматоидный артрит</kwd><kwd>CD3</kwd><kwd>CD20</kwd><kwd>CD68</kwd><kwd>метаболиты триптофана</kwd></kwd-group><kwd-group xml:lang="en"><kwd>rheumatoid arthritis</kwd><kwd>CD3</kwd><kwd>CD20</kwd><kwd>CD68</kwd><kwd>tryptophan metabolites</kwd></kwd-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Deane KD. Rheumatoid arthritis: Prediction of future clinically-apparent disease, and prevention. Curr Opin Rheumatol. 2024; 36(3): 225-234. doi: 10.1097/BOR.0000000000001013</mixed-citation><mixed-citation xml:lang="en">Deane KD. Rheumatoid arthritis: Prediction of future clinically-apparent disease, and prevention. 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