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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">Russian Journal of Dentistry</journal-id><journal-title-group><journal-title xml:lang="en">Russian Journal of Dentistry</journal-title><trans-title-group xml:lang="ru"><trans-title>Российский стоматологический журнал</trans-title></trans-title-group></journal-title-group><issn publication-format="print">1728-2802</issn><issn publication-format="electronic">2413-2934</issn><publisher><publisher-name xml:lang="en">Eco-Vector</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">706126</article-id><article-id pub-id-type="doi">10.17816/dent706126</article-id><article-id pub-id-type="edn">NAMHCO</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>Original Study Articles</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>Оригинальные исследования</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">Impact of synbiotic therapy on periodontal status and molecular biomarkers in patients with chronic periodontitis concurrent with obesity and dysbiosis: a randomized clinical trial</article-title><trans-title-group xml:lang="ru"><trans-title>Влияние лечения с применением синбиотиков на состояние пародонта и молекулярные биомаркёры у пациентов с хроническим пародонтитом на фоне ожирения и дисбиоза: рандомизированное клиническое исследование</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-9105-0796</contrib-id><contrib-id contrib-id-type="spin">3018-7883</contrib-id><name-alternatives><name xml:lang="en"><surname>Amkhadova</surname><given-names>Malkan A.</given-names></name><name xml:lang="ru"><surname>Амхадова</surname><given-names>Малкан Абдрашидовна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>MD, Dr. Sci. (Medicine), Professor</p></bio><bio xml:lang="ru"><p>д-р мед. наук, профессор</p></bio><email>amkhadova@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0009-0005-5117-8575</contrib-id><name-alternatives><name xml:lang="en"><surname>Iztleuov</surname><given-names>Sagyntay A.</given-names></name><name xml:lang="ru"><surname>Изтлеуов</surname><given-names>Сагынтай Аскарович</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>MD</p></bio><email>iztleuov.sagyntay@mail.ru</email><xref ref-type="aff" rid="aff1"/><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-0673-2555</contrib-id><contrib-id contrib-id-type="spin">3449-0543</contrib-id><name-alternatives><name xml:lang="en"><surname>Saltovets</surname><given-names>Maria V.</given-names></name><name xml:lang="ru"><surname>Салтовец</surname><given-names>Мария Владимровна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>MD, Cand. Sci. (Medicine)</p></bio><bio xml:lang="ru"><p>канд. мед. наук</p></bio><email>saltovetcm@yandex.ru</email><xref ref-type="aff" rid="aff3"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-3840-8127</contrib-id><contrib-id contrib-id-type="spin">9646-4239</contrib-id><name-alternatives><name xml:lang="en"><surname>Petrukhina</surname><given-names>Nataliia B.</given-names></name><name xml:lang="ru"><surname>Петрухина</surname><given-names>Наталья Борисовна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>MD, Dr. Sci. (Medicine), Professor</p></bio><bio xml:lang="ru"><p>д-р мед. наук, профессор</p></bio><email>Nataliastom@gmail.com</email><xref ref-type="aff" rid="aff4"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Moscow Regional Research and Clinical Institute</institution></aff><aff><institution xml:lang="ru">Московский областной научно-исследовательский клинический институт имени М.Ф. Владимирского</institution></aff></aff-alternatives><aff-alternatives id="aff2"><aff><institution xml:lang="en">West Kazakhstan Marat Ospanov State Medical University</institution></aff><aff><institution xml:lang="ru">Западно-Казахстанский университет имени Марата Оспанова</institution></aff></aff-alternatives><aff-alternatives id="aff3"><aff><institution xml:lang="en">Russian Medical Academy of Continuous Professional Education</institution></aff><aff><institution xml:lang="ru">Российская медицинская академия непрерывного профессионального образования</institution></aff></aff-alternatives><aff-alternatives id="aff4"><aff><institution xml:lang="en">The First Sechenov Moscow State Medical University</institution></aff><aff><institution xml:lang="ru">Первый Московский государственный медицинский университет имени И.М. Сеченова</institution></aff></aff-alternatives><pub-date date-type="preprint" iso-8601-date="2026-05-08" publication-format="electronic"><day>08</day><month>05</month><year>2026</year></pub-date><pub-date date-type="pub" iso-8601-date="2026-06-11" publication-format="electronic"><day>11</day><month>06</month><year>2026</year></pub-date><volume>30</volume><issue>2</issue><issue-title xml:lang="en"/><issue-title xml:lang="ru"/><fpage>87</fpage><lpage>96</lpage><history><date date-type="received" iso-8601-date="2026-04-14"><day>14</day><month>04</month><year>2026</year></date><date date-type="accepted" iso-8601-date="2026-04-27"><day>27</day><month>04</month><year>2026</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2026, Eco-Vector</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2026, Эко-Вектор</copyright-statement><copyright-year>2026</copyright-year><copyright-holder xml:lang="en">Eco-Vector</copyright-holder><copyright-holder xml:lang="ru">Эко-Вектор</copyright-holder><ali:free_to_read xmlns:ali="http://www.niso.org/schemas/ali/1.0/" start_date="2029-06-11"/><license><ali:license_ref xmlns:ali="http://www.niso.org/schemas/ali/1.0/">https://creativecommons.org/licenses/by-nc-nd/4.0/</ali:license_ref></license></permissions><self-uri xlink:href="https://rjdentistry.com/1728-2802/article/view/706126">https://rjdentistry.com/1728-2802/article/view/706126</self-uri><abstract xml:lang="en"><p><bold>BACKGROUND:</bold><italic> </italic>According to published data, the pathogenetic link between chronic periodontitis and morbid obesity (body mass index &gt; 40 kg/m²) is mediated by gastrointestinal dysbiosis, systemic inflammation, oxidative stress, and endotoxemia. Bacterial toxins and inflammatory mediators circulating in the bloodstream of obese patients contribute to progressive destruction of periodontal tissues and reduce the effectiveness of regenerative processes during periodontitis treatment. Therapy for such patients should include measures to normalize the intestinal microbiota composition.</p> <p><bold>AIM:</bold><italic> </italic>To evaluate the effect of conservative treatment with probiotics on periodontal tissue status and molecular biomarkers in patients with periodontitis concurrent with obesity and dysbiosis.</p> <p><bold>METHODS:</bold><italic> </italic>The study included 70 individuals (aged 45–59 years) with chronic periodontitis, morbid obesity, and intestinal dysbiosis, divided into two equal groups. Patients in group 1 (<italic>n</italic> = 35) received, in addition to standard therapy, a complex of live <italic>Lactobacillus</italic> and/or <italic>Bifidobacterium</italic> strains (Bifilyuks, Russia) combined with a prebiotic (lactitol) and metabiotics. Patients in group 2 (<italic>n</italic> = 35) received standard periodontitis therapy consisting of ultrasonic removal of dental deposits, surface polishing, and antiseptic treatment. Treatment efficacy was assessed at 3, 6, 9, and 12 months using the Russell Periodontal Index and probing pocket depth. Additionally, cytokine and osteomarker concentrations in periodontal exudate were monitored at 3 and 6 months.</p> <p><bold>RESULTS:</bold><italic> </italic>After treatment, both groups showed significant reductions in periodontal index scores and probing pocket depth, indicating resolution of periodontal inflammation. However, the additional use of probiotics in group 1 resulted in a more pronounced reduction in the Russell Periodontal Index compared to group 2, particularly during the first 3–9 months. Concentrations of interleukin-8, tumor necrosis factor-alpha, and cathepsin K were also significantly lower after treatment in group 1.</p> <p><bold>CONCLUSION:</bold><italic> </italic>The use of synbiotics as part of comprehensive conservative treatment in patients with periodontitis, obesity, and dysbiosis demonstrated high anti-inflammatory efficacy, as evidenced by clinical parameters and molecular markers of inflammation and bone resorption.</p></abstract><trans-abstract xml:lang="ru"><p><bold>Обоснование.</bold> Согласно данным литературы, патогенетическая связь хронического пародонтита и морбидного ожирения (индекс массы тела более 40 кг/м²) обусловлена дисбиозом пищеварительного тракта, системным воспалением, оксидативным стрессом и эндотоксемией. Циркулирующие в системном кровотоке бактериальные токсины и медиаторы воспаления у пациентов с ожирением способствуют прогрессирующей деструкции тканей пародонта и снижают эффективность регенераторных процессов при лечении пародонтита. Терапия таких пациентов должна включать мероприятия по нормализации состава кишечного микробиоценоза.</p> <p><bold>Цель.</bold><bold> </bold>Изучить влияние консервативного лечения с применением пробиотиков на состояние тканей пародонта и молекулярные биомаркёры у пациентов с пародонтитом на фоне ожирения и дисбиоза.</p> <p><bold>Методы.</bold> В исследование включено 70 человек (45–59 лет) с хроническим пародонтитом, морбидным ожирением и дисбактериозом кишечника, разделённых на две равные группы. Пациенты группы 1 (<italic>n</italic>=35) дополнительно к стандартной терапии получали комплекс живых лакто- и/или бифидобактерий («Бифилюкс», Россия) с пребиотиком (лактит) и метабиотиками. Пациенты группы 2 (<italic>n</italic>=35) получали стандартную терапию пародонтита: ультразвуковое удаление зубных отложений, полирование поверхностей и антисептическую обработку. Эффективность оценивали через 3, 6, 9 и 12 мес по индексу Рассела и глубине пародонтальных карманов. Дополнительно через 3 и 6 мес контролировали концентрации цитокинов и остеомаркёра в пародонтальном экссудате.</p> <p><bold>Результаты.</bold> После лечения в обеих группах значения пародонтального индекса и глубины пародонтальных карманов статистически значимо снизились, что свидетельствовало о купировании воспаления. Однако дополнительное применение пробиотиков в группе 1 способствовало более эффективному снижению индекса Рассела по сравнению с группой 2, особенно в первые 3–9 мес. Концентрации интерлейкина-8, фактора некроза опухоли альфа и катепсина К после лечения также значительнее снижались в группе 1.</p> <p><bold>Заключение.</bold> Применение синбиотиков в составе комплексного консервативного лечения пациентов с пародонтитом, ожирением и дисбиозом показало высокую противовоспалительную эффективность, о чем свидетельствовали клинические показатели и молекулярные маркёры воспаления и костной резорбции.</p></trans-abstract><kwd-group xml:lang="en"><kwd>chronic periodontitis</kwd><kwd>obesity</kwd><kwd>dysbiosis</kwd><kwd>probiotics</kwd><kwd>cytokines</kwd><kwd>osteomarkers</kwd><kwd>cathepsin K</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>хронический пародонтит</kwd><kwd>ожирение</kwd><kwd>дисбиоз</kwd><kwd>пробиотики</kwd><kwd>цитокины</kwd><kwd>остеомаркёры</kwd><kwd>катепсин К</kwd></kwd-group><funding-group/></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Lamont RJ, Koo H, Hajishengallis G. 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