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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">624170</article-id><article-id pub-id-type="doi">10.17816/humeco624170</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">The ratio of immunocompetent cells, immunoglobulins and cytokines in individuals with a comorbid background after COVID-19 in the Arctic region</article-title><trans-title-group xml:lang="ru"><trans-title>Соотношение иммунокомпетентных клеток, иммуноглобулинов и цитокинов у лиц с коморбидным фоном после COVID-19 в арктическом регионе</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-1735-6690</contrib-id><contrib-id contrib-id-type="spin">8137-0571</contrib-id><name-alternatives><name xml:lang="en"><surname>Shashkova</surname><given-names>Elizaveta Y.</given-names></name><name xml:lang="ru"><surname>Шашкова</surname><given-names>Елизавета Юрьевна</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><email>eli1255@ya.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-6306-1068</contrib-id><contrib-id contrib-id-type="spin">4890-4668</contrib-id><name-alternatives><name xml:lang="en"><surname>Popovskaya</surname><given-names>Ekaterina V.</given-names></name><name xml:lang="ru"><surname>Поповская</surname><given-names>Екатерина Васильевна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>miakati15@gmail.com</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-6117-0562</contrib-id><contrib-id contrib-id-type="spin">8507-7525</contrib-id><name-alternatives><name xml:lang="en"><surname>Filippova</surname><given-names>Oxana E.</given-names></name><name xml:lang="ru"><surname>Филиппова</surname><given-names>Оксана Евгеньевна</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><email>eli1255@ya.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-4900-4021</contrib-id><contrib-id contrib-id-type="spin">6859-2123</contrib-id><name-alternatives><name xml:lang="en"><surname>Shchegoleva</surname><given-names>Lyubov S.</given-names></name><name xml:lang="ru"><surname>Щёголева</surname><given-names>Любовь Станиславовна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Dr. Sci. (Biology), рrofessor</p></bio><bio xml:lang="ru"><p>д-р биол. наук, профессор</p></bio><email>shchegoleva60@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">N. Laverov Federal Center for Integrated Arctic Research of the Ural Branch of the Russian Аcademy of Science</institution></aff><aff><institution xml:lang="ru">Федеральный исследовательский центр комплексного изучения Арктики им. академика Н.П. Лаверова Уральского отделения Российской академии наук</institution></aff></aff-alternatives><pub-date date-type="preprint" iso-8601-date="2023-12-11" publication-format="electronic"><day>11</day><month>12</month><year>2023</year></pub-date><pub-date date-type="pub" iso-8601-date="2023-12-23" publication-format="electronic"><day>23</day><month>12</month><year>2023</year></pub-date><volume>30</volume><issue>9</issue><issue-title xml:lang="en"/><issue-title xml:lang="ru"/><fpage>671</fpage><lpage>680</lpage><history><date date-type="received" iso-8601-date="2023-12-02"><day>02</day><month>12</month><year>2023</year></date><date date-type="accepted" iso-8601-date="2023-12-07"><day>07</day><month>12</month><year>2023</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2023, Eco-Vector</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2023, Эко-Вектор</copyright-statement><copyright-year>2023</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/"/><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/624170">https://hum-ecol.ru/1728-0869/article/view/624170</self-uri><abstract xml:lang="en"><p><bold>BACKGROUND<italic>: </italic></bold>The level of resistance to the effects of the environmental factors among people living in the North is significantly reduced due to slower development of the immune system in children and a lower reserve capabilities of immune reactions among adults. This is important in the context of a new coronavirus infection. Respiratory diseases are the main causes of morbidity among the residents of the North. Little is known about the state of immune homeostasis after COVID-19 among residents of the Arctic with a history of chronic respiratory diseases.</p> <p><bold>AIM<italic>:</italic></bold> To identify concentrations of immunocompetent cells, immunoglobulins, and cytokines after COVID-19 in individuals with a comorbid background.</p> <p><bold>MATERIAL AND METHODS<italic>:</italic></bold> In total, 45 residents of Arkhangelsk including 25 women and 20 men, aged 18–40 with a history of laboratory confirmed COVID-19 (U07.1) of mild or moderate severity comprised the sample. All the study participants had a history of concomitant chronic bronchitis.</p> <p><bold>RESULTS<italic>:</italic></bold> In women, high values of cellular immunological parameters CD8<sup>+ </sup>and CD95<sup>+</sup>, as well as immunoglobulins IgM, IgG, IgE were associated with elevated values of cytokine IL-1β in 17–45% of cases, depending on the indicator (all <italic>p</italic><bold> </bold>&lt;0.01). Only in 10% of cases we observed increased content of IL-10 and TNF-α. In men, high concentrations of CD8<sup>+</sup> and CD95<sup>+</sup> cells were associated with increased levels of IgA (5%), IgM, IgG, IgE (13–25%). Seventeen percent of cases had high levels of IL-10 and 15% had high concentrations of TNF-α.</p> <p><bold>CONCLUSIONS<italic>:</italic></bold> Young residents of the North with a history of chronic bronchitis after Covid-19 of mild or moderate severity have high concentrations of CD8<sup>+</sup> and CD95<sup>+</sup> cells, IgM, IgG, IgE, IL-10 and TNF-α c low concentrations combined with CD10<sup>+</sup> and IL-4 cells.</p></abstract><trans-abstract xml:lang="ru"><p><bold>Обоснование. </bold>Уровень устойчивости организма человека, проживающего на Севере, к воздействию различных повреждающих факторов существенно ниже по причине затормаживания созревания иммунитета у детей и понижения резервных возможностей иммунных реакций у взрослых, что особенно важно в условиях новой коронавирусной инфекции. На Севере широко распространена «краевая патология» — болезни бронхолёгочной системы. В настоящий момент нет сведений о состоянии иммунного гомеостаза после COVID-19 у жителей Арктического региона с коморбидным фоном в анамнезе.</p> <p><bold>Цель. </bold>Выявить соотношение иммунокомпетентных клеток, иммуноглобулинов и цитокинов после COVID-19 у лиц с коморбидным фоном.</p> <p><bold>Материал и методы. </bold>Обследовано 45 человек 18–40 лет, из них 25 женщин и 20 мужчин, жителей г. Архангельска, перенёсших COVID-19 лёгкой и/или средней степени тяжести, подтверждённый лабораторно (U07.1). У всех обследованных северян в анамнезе имелось сопутствующее хроническое заболевание краевой патологии (хронический бронхит).</p> <p><bold>Результаты.</bold> Частота встречаемости повышенных значений клеточных иммунологических показателей CD8<sup>+</sup> и CD95<sup>+</sup>, а также иммуноглобулинов IgM, IgG, IgE у молодых женщин после COVID-19 с хроническим бронхитом в анамнезе ассоциирована с повышенными значениями цитокина IL-1β в 17–45% случаев в зависимости от показателя (<italic>p</italic> &lt;0,01) и только в 10% случаев взаимосвязана с повышенным содержанием IL-10 и TNF-α. У молодых мужчин после COVID-19 с хроническим бронхитом в анамнезе высокие концентрации клеток CD8<sup>+</sup> и CD95<sup>+</sup> взаимосвязаны с повышенным содержанием IgА (5%), IgM, IgG, IgE (13–25%) и ассоциируются в 17% случаев с высоким уровнем содержания IL-10 и TNF-α (15%).</p> <p><bold>Заключение.</bold> У молодых северян с хроническим бронхитом в анамнезе после COVID-19 лёгкой и/или средней степени тяжести сохраняется высокая концентрация клеток CD8<sup>+</sup> и CD95<sup>+</sup>, IgM, IgG, IgE, IL-10 и TNF-α на фоне низкой концентрации клеток CD10<sup>+</sup> и IL-4.</p></trans-abstract><kwd-group xml:lang="en"><kwd>COVID-19</kwd><kwd>SARS-CoV-2</kwd><kwd>cytokines</kwd><kwd>North</kwd><kwd>comorbid background</kwd><kwd>bronchitis</kwd><kwd>immunoglobulins</kwd><kwd>immunocompetent cells</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>COVID-19</kwd><kwd>SARS-CoV-2</kwd><kwd>цитокины</kwd><kwd>Север</kwd><kwd>коморбидный фон</kwd><kwd>бронхит</kwd><kwd>иммуноглобулины</kwd><kwd>иммунокомпетентные клетки</kwd></kwd-group><funding-group><award-group><funding-source><institution-wrap><institution xml:lang="ru">Российский научный фонд</institution></institution-wrap><institution-wrap><institution xml:lang="en">Russian Science Foundation</institution></institution-wrap></funding-source><award-id>22-25-20143</award-id></award-group></funding-group></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><citation-alternatives><mixed-citation xml:lang="en">Demin AV, Popova ON, Gudkov AB. 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