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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">Ekologiya cheloveka (Human Ecology)</journal-id><journal-title-group><journal-title xml:lang="en">Ekologiya cheloveka (Human Ecology)</journal-title><trans-title-group xml:lang="ru"><trans-title>Экология человека</trans-title></trans-title-group></journal-title-group><issn publication-format="print">1728-0869</issn><issn publication-format="electronic">2949-1444</issn><publisher><publisher-name xml:lang="en">Eco-Vector</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">701292</article-id><article-id pub-id-type="doi">10.17816/humeco701292</article-id><article-id pub-id-type="edn">SJFYOK</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">C-Reactive protein and metabolic disorders in the indigenous population of the Republic of Sakha (Yakutia): a cross-sectional study</article-title><trans-title-group xml:lang="ru"><trans-title>С-реактивный белок и метаболические нарушения у коренного населения Республики Саха (Якутия): одномоментное исследование</trans-title></trans-title-group><trans-title-group xml:lang="zh"><trans-title>C反应蛋白与雅库特共和国（萨哈）土著居民的代谢紊乱：横断面研究</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-2746-0608</contrib-id><contrib-id contrib-id-type="scopus">15060483200</contrib-id><contrib-id contrib-id-type="researcherid">M-5538-2013</contrib-id><contrib-id contrib-id-type="spin">2635-0865</contrib-id><name-alternatives><name xml:lang="en"><surname>Klimova</surname><given-names>Tatiana M.</given-names></name><name xml:lang="ru"><surname>Климова</surname><given-names>Татьяна Михайловна</given-names></name><name xml:lang="zh"><surname>Klimova</surname><given-names>Tatiana M.</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><bio xml:lang="zh"><p>MD, Cand. Sci. (Medicine)</p></bio><email>biomedykt@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-1395-8256</contrib-id><contrib-id contrib-id-type="scopus">57190874516</contrib-id><contrib-id contrib-id-type="researcherid">H-1475-2019</contrib-id><contrib-id contrib-id-type="spin">8399-6329</contrib-id><name-alternatives><name xml:lang="en"><surname>Zakharova</surname><given-names>Raisa N.</given-names></name><name xml:lang="ru"><surname>Захарова</surname><given-names>Раиса Николаевна</given-names></name><name xml:lang="zh"><surname>Zakharova</surname><given-names>Raisa N.</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><bio xml:lang="zh"><p>MD, Cand. Sci. (Medicine)</p></bio><email>prn.inst@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-1501-7433</contrib-id><contrib-id contrib-id-type="scopus">6507766508</contrib-id><contrib-id contrib-id-type="researcherid">B-4999-2019</contrib-id><contrib-id contrib-id-type="spin">9571-3044</contrib-id><name-alternatives><name xml:lang="en"><surname>Sivtseva</surname><given-names>Tatyana M.</given-names></name><name xml:lang="ru"><surname>Сивцева</surname><given-names>Татьяна Михайловна</given-names></name><name xml:lang="zh"><surname>Sivtseva</surname><given-names>Tatyana M.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Cand. Sci. (Biology)</p></bio><bio xml:lang="ru"><p>канд. биол. наук</p></bio><bio xml:lang="zh"><p>Cand. Sci. (Biology)</p></bio><email>tm.sivtseva@s-vfu.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-7776-5464</contrib-id><contrib-id contrib-id-type="scopus">57202949056</contrib-id><contrib-id contrib-id-type="researcherid">B-8069-2018</contrib-id><contrib-id contrib-id-type="spin">2471-9442</contrib-id><name-alternatives><name xml:lang="en"><surname>Ammosova</surname><given-names>Elena P.</given-names></name><name xml:lang="ru"><surname>Аммосова</surname><given-names>Елена Петровна</given-names></name><name xml:lang="zh"><surname>Ammosova</surname><given-names>Elena P.</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><bio xml:lang="zh"><p>MD, Cand. Sci. (Medicine)</p></bio><email>ammosovael@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-5220-0766</contrib-id><contrib-id contrib-id-type="spin">7834-3840</contrib-id><name-alternatives><name xml:lang="en"><surname>Kuzmina</surname><given-names>Ariana A.</given-names></name><name xml:lang="ru"><surname>Кузьмина</surname><given-names>Ариана Афанасьевна</given-names></name><name xml:lang="zh"><surname>Kuzmina</surname><given-names>Ariana A.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Cand. Sci. (Pharmacy), Associate Professor</p></bio><bio xml:lang="ru"><p>канд. фарм. наук, доцент</p></bio><bio xml:lang="zh"><p>Cand. Sci. (Pharmacy), Associate Professor</p></bio><email>aakuzmina63@gmail.com</email><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">M.K. Ammosov North-Eastern Federal University</institution></aff><aff><institution xml:lang="ru">Северо-Восточный федеральный университет им. М.К. Аммосова</institution></aff><aff><institution xml:lang="zh">M.K. Ammosov North-Eastern Federal University</institution></aff></aff-alternatives><pub-date date-type="preprint" iso-8601-date="2026-02-14" publication-format="electronic"><day>14</day><month>02</month><year>2026</year></pub-date><pub-date date-type="pub" iso-8601-date="2026-03-29" publication-format="electronic"><day>29</day><month>03</month><year>2026</year></pub-date><volume>33</volume><issue>2</issue><issue-title xml:lang="en"/><issue-title xml:lang="ru"/><issue-title xml:lang="zh"/><fpage>117</fpage><lpage>130</lpage><history><date date-type="received" iso-8601-date="2026-01-19"><day>19</day><month>01</month><year>2026</year></date><date date-type="accepted" iso-8601-date="2026-02-07"><day>07</day><month>02</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-statement xml:lang="zh">Copyright ©; 2026, Eco-Vector</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><copyright-holder xml:lang="zh">Eco-Vector</copyright-holder><ali:free_to_read xmlns:ali="http://www.niso.org/schemas/ali/1.0/"/><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://hum-ecol.ru/1728-0869/article/view/701292">https://hum-ecol.ru/1728-0869/article/view/701292</self-uri><abstract xml:lang="en"><p><bold>BACKGROUND:</bold> C-reactive protein is widely used in population-based studies as a marker of systemic inflammation associated with metabolic disorders. However, the characteristics of these associations in indigenous populations of northern regions remain insufficiently studied.</p> <p><bold>AIM:</bold> This work aimed to evaluate the association between C-reactive protein levels and metabolic disorders in the indigenous population of the Republic of Sakha (Yakutia), taking into account age and sex.</p> <p><bold>METHODS:</bold> The analysis included data from a cross-sectional study of 662 indigenous residents of Yakutia (238 men and 424 women). Anthropometric parameters, lipid and glucose metabolism indicators, and the presence of hypertension and metabolic syndrome were assessed. High-sensitivity C-reactive protein was analyzed both as a continuous variable (quartile analysis) and as a binary variable (C-reactive protein &gt; 3 mg/L). Associations were evaluated using univariable and multivariable logistic regression models adjusted for age and sex. An obesity × sex interaction term was also tested.</p> <p><bold>RESULTS:</bold> Elevated C-reactive protein levels (&gt;3 mg/L) were identified in 25.7% (95% CI: 22.4–29.2) of participants. Elevated C-reactive protein was associated with higher body mass index, waist circumference, and the presence of metabolic abnormalities. In the multivariable model, obesity remained independently associated with elevated C-reactive protein (adjusted odds ratio 1.97; 95% confidence interval (CI): 1.28–3.02), along with age (adjusted odds ratio 1.03 per year; 95% CI: 1.01–1.04) and female sex (adjusted odds ratio 1.66; 95% CI: 1.12–2.47). No significant interaction between obesity and sex was observed.</p> <p><bold>CONCLUSION:</bold> In the indigenous population of Yakutia, C-reactive protein levels are associated with obesity, other metabolic abnormalities, age, and sex. These findings support the role of C-reactive protein as a marker of chronic low-grade inflammation related to metabolic risk, age, and sex. The results highlight the importance of considering these factors when assessing cardiometabolic risk in northern populations. The limitations of the study include the need to interpret the presented results in light of the cross-sectional design and the specific features of the studied northern population.</p></abstract><trans-abstract xml:lang="ru"><p><bold>Обоснование.</bold> С-реактивный белок широко используется в популяционных исследованиях как маркёр системного воспаления, ассоциированного с метаболическими нарушениями. Вместе с тем особенности этих ассоциаций в коренных популяциях северных регионов изучены недостаточно.</p> <p><bold>Цель.</bold> Оценка связи уровня С-реактивного белка с метаболическими нарушениями у коренного населения Республики Саха (Якутия) с учётом возраста и пола.</p> <p><bold>Методы.</bold> В анализе использовали данные одномоментного исследования 662 представителей коренного населения Якутии (238 мужчин и 424 женщины). Оценивали антропометрические показатели, параметры липидного и углевод ного обмена, наличие артериальной гипертензии и метаболического синдрома. Уровень высокочувствительного С-реактивного белка анализировали как непрерывную величину (квартильный анализ), а также как бинарный показатель (С-реактивный белок &gt;3 мг/л). Для оценки ассоциаций использовали однофакторную и многофакторную логистическую регрессию с поправкой на возраст и пол, а также проверяли взаимодействие ожирение*пол.</p> <p><bold>Результаты.</bold> Повышенный уровень С-реактивного белка (&gt;3 мг/л) выявлен у 25,7% (95% доверительный интервал (ДИ): 22,4–29,2) обследованных. Его уровень ассоциирован с увеличением индекса массы тела, окружности талии и наличием метаболических нарушений. В многофакторной модели ожирение сохраняло независимую ассоциацию с повышенным уровнем С-реактивного белка (скорректированное отношение шансов — 1,97; 95% ДИ: 1,28–3,02) наряду с возрастом (скорректированное отношение шансов — 1,03 на 1 год; 95% ДИ: 1,01–1,04) и женским полом (скорректированное отношение шансов — 1,66; 95% ДИ: 1,12–2,47). Статистически значимого взаимодействия между ожирением и полом не выявлено.</p> <p><bold>Заключение.</bold> У коренного населения Якутии уровень С-реактивного белка ассоциирован с ожирением и другими метаболическими нарушениями, а также возрастом и полом. Полученные данные подтверждают роль С-реактивного белка как маркёра хронического низкоинтенсивного воспаления, связанного с метаболическим неблагополучием, возрастом и половой принадлежностью обследованных, что подчёркивает значимость учёта этих факторов при оценке кардиометаболического риска в северных популяциях. К ограничениям исследования относится то, что представленные результаты необходимо интерпретировать с учётом<bold> </bold>одномоментного дизайна и специфики изучаемой популяции северного региона.</p></trans-abstract><trans-abstract xml:lang="zh"><p>论证。C反应蛋白广泛用于人群研究，作为与代谢紊乱相关的系统性炎症标志。然而，这些关联在北部地区土著人群中的特征研究尚不充分。</p> <p>目的。 评估C反应蛋白水平与萨哈共和国（雅库特）土著居民代谢紊乱的关系，并考虑年龄和性别因素。</p> <p>方法。 分析了662名雅库特土著居民（238名男性和424名女性）的横断面研究数据。评估了人体测量指标、脂质和碳水化合物代谢参数、高血压及代谢综合征的存在情况。将高敏C反应蛋白水平作为连续变量（四分位数分析）和二元指标（C反应蛋白&gt;3 mg/L）进行分析。采用单变量和多变量逻辑回归分析评估其关联性，并根据年龄和性别进行校正，同时检验了肥胖与性别的交互作用。</p> <p>结果。 25.7%（95%置信区间：22.4–29.2） 的受检者存在C反应蛋白水平升高（&gt;3 mg/L）。 其与体重指数增加、腰围增大及代谢紊乱的存在相关。在多变量模型中，肥胖与C反应蛋白水平升高保持独立关联（校正后优势比为1.97；95%置信区间：1.28–3.02），年龄（校正后优势比为每年1.03；95%置信区间：1.01–1.04）和女性性别（校正后优势比为1.66；95%置信区间：1.12–2.47）亦如此。未发现肥胖与性别之间存在统计学上显著的交互作用。</p> <p>结论。 在雅库特本地人口中，C反应蛋白水平与肥胖及其他代谢紊乱、年龄和性别相关。所得数据证实了C反应蛋白作为与代谢异常、年龄和性别相关的慢性低度炎症标志物的作用，这强调了在评估北方人群心血管代谢风险时考虑这些因素的重要性。本研究的局限性在于，需结合横断面研究设计及北方地区研究人群的特性来解释所得结果。</p></trans-abstract><kwd-group xml:lang="en"><kwd>C-reactive protein</kwd><kwd>metabolic disorders</kwd><kwd>obesity</kwd><kwd>inflammation</kwd><kwd>indigenous population</kwd><kwd>Yakutia</kwd><kwd>Russian Federation</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>С-реактивный белок</kwd><kwd>метаболические нарушения</kwd><kwd>ожирение</kwd><kwd>воспаление</kwd><kwd>коренное население</kwd><kwd>Якутия</kwd><kwd>Российская Федерация</kwd></kwd-group><kwd-group xml:lang="zh"><kwd>C反应蛋白</kwd><kwd>代谢紊乱</kwd><kwd>肥胖</kwd><kwd>炎症</kwd><kwd>土著居民</kwd><kwd>雅库特</kwd><kwd>俄罗斯联邦</kwd></kwd-group><funding-group><award-group><funding-source><institution-wrap><institution xml:lang="ru">Министерство науки и высшего образования Российской Федерации</institution></institution-wrap><institution-wrap><institution xml:lang="en">Ministry of Science and Higher Education of the Russian Federation</institution></institution-wrap><institution-wrap><institution xml:lang="zh">Ministry of Science and Higher Education of the Russian Federation</institution></institution-wrap></funding-source><award-id>01201369635</award-id></award-group><award-group><funding-source><institution-wrap><institution xml:lang="ru">Министерство науки и высшего образования Российской Федерации</institution></institution-wrap><institution-wrap><institution xml:lang="en">Ministry of Science and Higher Education of the Russian Federation</institution></institution-wrap><institution-wrap><institution xml:lang="zh">Ministry of Science and Higher Education of the Russian Federation</institution></institution-wrap></funding-source><award-id>01201460280</award-id></award-group><award-group><funding-source><institution-wrap><institution xml:lang="ru">Министерство науки и высшего образования Российской Федерации</institution></institution-wrap><institution-wrap><institution xml:lang="en">Ministry of Science and Higher Education of the Russian Federation</institution></institution-wrap><institution-wrap><institution xml:lang="zh">Ministry of Science and Higher Education of the Russian Federation</institution></institution-wrap></funding-source><award-id>075-03-2026-294</award-id></award-group><funding-statement xml:lang="en">The study was conducted as part of Research Project No. 4.8057.2013 Metabolic Disorders and Insulin Resistance in the Indigenous Population of Yakutia (2013). The study was funded by state budget allocations (State Registration No. 01201369635). It was also supported by Research Project No. 3052 2014/257 Adaptive Potential and Health of the Indigenous Population of Yakutia under Socio-Economic Modernization (2014–2016), carried out within the basic part of the state assignment of the Ministry of Education and Science of the Russian Federation (State Registration No. 01201460280). Additional support was provided under the basic part of the state assignment of the Ministry of Science and Higher Education of the Russian Federation (Project FSRG-2026-0008 Genetic Studies of the Population of Northeastern Russia: Psychogenetics, Molecular Aspects of Aging, and Socially Substantial and Hereditary Diseases).</funding-statement><funding-statement xml:lang="ru">НИР 4.8057.2013 «Метаболические нарушения и инсулинорезистентность у коренного населения Якутии» (2013). Бюджетные ассигнования (номер госрегистрации 01201369635). НИР № 3052 2014/257 «Адаптационный потенциал и здоровье коренного населения Якутии в условиях модернизации социально-экономической системы» (в рамках базовой части государственного задания Минобрнауки России, номер госрегистрации 01201460280, 2014–2016 гг.). Базовая часть государственного задания Министерства науки и высшего образования РФ (проект FSRG-2026-0008 «Генетические исследования населения Северо-Востока России: психогенетика, молекулярные аспекты старения, социально-значимых и наследственных заболеваний»).</funding-statement><funding-statement xml:lang="zh">The study was conducted as part of Research Project No. 4.8057.2013 Metabolic Disorders and Insulin Resistance in the Indigenous Population of Yakutia (2013). The study was funded by state budget allocations (State Registration No. 01201369635). It was also supported by Research Project No. 3052 2014/257 Adaptive Potential and Health of the Indigenous Population of Yakutia under Socio-Economic Modernization (2014–2016), carried out within the basic part of the state assignment of the Ministry of Education and Science of the Russian Federation (State Registration No. 01201460280). Additional support was provided under the basic part of the state assignment of the Ministry of Science and Higher Education of the Russian Federation (Project FSRG-2026-0008 Genetic Studies of the Population of Northeastern Russia: Psychogenetics, Molecular Aspects of Aging, and Socially Substantial and Hereditary Diseases).</funding-statement></funding-group></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Battineni G, Sagaro GG, Chintalapudi N, et al. Impact of obesity-induced inflammation on cardiovascular diseases (CVD). 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