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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">nefr</journal-id><journal-title-group><journal-title xml:lang="ru">Нефрология</journal-title><trans-title-group xml:lang="en"><trans-title>Nephrology (Saint-Petersburg)</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">1561-6274</issn><issn pub-type="epub">2541-9439</issn><publisher><publisher-name>Pavlov First Saint-Petersburg State Medical University</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.36485/1561-6274-2023-27-3-86-91</article-id><article-id custom-type="edn" pub-id-type="custom">JCKLFT</article-id><article-id custom-type="elpub" pub-id-type="custom">nefr-2244</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>ОРИГИНАЛЬНЫЕ СТАТЬИ. ЭКСПЕРИМЕНТАЛЬНЫЕ ИССЛЕДОВАНИЯ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>ORIGINAL ARTICLES. EXPERIMENTAL INVESTIGATION</subject></subj-group></article-categories><title-group><article-title>Моделирование ревматоидного артрита сопровождается изменением кортико-папиллярного соотношения гиалуронидазной активности почек</article-title><trans-title-group xml:lang="en"><trans-title>Modeling of rheumatoid arthritis is accompanied by a change in the cortico-papillary ratio of hyaluronidase activity of the kidneys</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-2428-8024</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Дзгоев</surname><given-names>С. Г.</given-names></name><name name-style="western" xml:lang="en"><surname>Dzgoev</surname><given-names>S. G.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Доц. Дзгоев Станислав Георгиевич, канд. биол. наук, старший научный сотрудник,</p><p>362025, Республика Северная Осетия–Алания, г. Владикавказ, ул. Пушкинская, дом 47</p></bio><bio xml:lang="en"><p>Stanislav G. Dzgoev, PhD, Associate Professor, senior researcher,</p><p>362025, Republic of North Ossetia–Alania, Vladikavkaz, Pushkinskaya str., 47</p></bio><email xlink:type="simple">stanislavdzgoev@yandex.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Институт биомедицинских исследований, Владикавказский Научный центр Российской академии наук</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Institute of Biomedical Research – branch of the Federal State Budgetary Institution of the Federal Scientific Center "Vladikavkaz Scientifi c Center of the Russian Academy of Sciences"</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2023</year></pub-date><pub-date pub-type="epub"><day>12</day><month>09</month><year>2023</year></pub-date><volume>27</volume><issue>3</issue><fpage>86</fpage><lpage>91</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Дзгоев С.Г., 2023</copyright-statement><copyright-year>2023</copyright-year><copyright-holder xml:lang="ru">Дзгоев С.Г.</copyright-holder><copyright-holder xml:lang="en">Dzgoev S.G.</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://journal.nephrolog.ru/jour/article/view/2244">https://journal.nephrolog.ru/jour/article/view/2244</self-uri><abstract><p>Ревматоидный артрит является заболеванием, которое сопровождается нарушениями функционирования почек у большинства пациентов, что привлекает внимание исследователей к этой проблеме. Как в суставах, так и в почках, гиалуроновая кислота выполняет важную роль, от степени полимеризации которой зависит работоспособность этих органов. Деградация гиалуроновой кислоты под действием гиалуронидаз, может быть фактором, участвующим как в развитии воспалительного процесса при ревматоидном артрите, так и при реализации осморегулирующих функций организма.</p><sec><title>Цель работы</title><p>Цель работы: уточнить, сопровождается ли в эксперименте формирование воспалительных изменений суставов изменением кортико-папиллярного соотношения гиалуронидазной активности в почках.</p></sec><sec><title>Материалы и методы</title><p>Материалы и методы. У крыс линии Вистар путем однократного введения полного адъюванта Фрейнда создавали модель ревматоидного артрита. По прошествии 7 нед после инъекции степень патологических изменений суставов оценивали радиографическим методом и определяли гиалуронидазную активность в различных зонах почек при помощи зимографии.</p></sec><sec><title>Результаты</title><p>Результаты. Выявлено, что в коре и папиллярной зоне почек гиалуронидазная активность была характерна для белков с молекулярной массой 63 и 73 кДа. Показано, что развитие воспалительного процесса сопровождается изменением кортико-папиллярного соотношения гиалуронидазной активности в почках. В папиллярной зоне наблюдалось уменьшение гиалуронидазной активности, в среднем, в 1,6 раза, в то время как в коре почек гиалуронидазная активность увеличивалась в 1,5 раза.</p></sec><sec><title>Заключение</title><p>Заключение. Такое перераспределение гиалуронидазной активности в корковой и папиллярной зонах почек при ревматоидном артрите может приводить к снижению эффективности механизма осмотического концентрирования мочи и нарушениям функционирования почек.</p></sec></abstract><trans-abstract xml:lang="en"><sec><title>Background</title><p>Background. Rheumatoid arthritis is a disease that is accompanied by impaired kidney function in most patients, which attracts the attention of researchers to this problem. Both in the joints and in the kidneys, hyaluronic acid plays an important role, the degree of polymerization of which depends on the functioning of these organs. The degradation of hyaluronic acid by hyaluronidases may be a factor involved in the development of the inflammatory process in rheumatoid arthritis as well as in the realization of osmoregulatory functions of the body. In this regard, the purpose of this work was to find out whether the development of this pathology can affect on the hyaluronidase activity in the kidneys. THE AIM: to clarify is in the experiment formation of inflammatory changes in the joints accompanied by a change in the cortico-papillary ratio of hyaluronidase activity in the kidneys.</p></sec><sec><title>Materials and Methods</title><p>Materials and Methods. A model of rheumatoid arthritis was created in Wistar rats by a single administration of a complete Freund adjuvant. After 7 weeks after injection, the degree of pathological changes in the joints was assessed by radiographic method and the hyaluronidase activity in various kidney zones was determined using zymography.</p></sec><sec><title>Results</title><p>Results. It was revealed that in the cortex and papillary zone of the kidneys, hyaluronidase activity was characteristic of proteins with a molecular weight of 63 and 73 kDa. It has been shown that the development of the inflammatory process is accompanied by a change in the corticopapillary ratio of hyaluronidase activity in the kidneys. In the papillary zone, a decrease in hyaluronidase activity was observed, on average, by 1.6 times, while in the renal cortex, hyaluronidase activity increased by 1.5 times.</p></sec><sec><title>Conclusion</title><p>Conclusion. Such a redistribution of hyaluronidase activity in the cortical and papillary zones of the kidneys in rheumatoid arthritis can lead to a decrease in the effectiveness of the mechanism of osmotic concentration of urine and impaired kidney function. </p></sec></trans-abstract><kwd-group xml:lang="ru"><kwd>почки</kwd><kwd>ревматоидный артрит</kwd><kwd>гиалуроновая кислота</kwd><kwd>гиалуронидаза</kwd></kwd-group><kwd-group xml:lang="en"><kwd>kidneys</kwd><kwd>rheumatoid arthritis</kwd><kwd>hyaluronic acid</kwd><kwd>hyaluronidase</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">Folomeeva OM, Erdes S. Rheumatic diseases and disability of Russian Federation adult population. Rheumatology Science and Practice 2007;45(4):4–9. https://doi.org/10.14412/1995-4484-2007-4-9</mixed-citation><mixed-citation xml:lang="en">Folomeeva OM, Erdes S. 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