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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">Cell and Tissue Biology</journal-id><journal-title-group><journal-title xml:lang="en">Cell and Tissue Biology</journal-title><trans-title-group xml:lang="ru"><trans-title>Цитология</trans-title></trans-title-group></journal-title-group><issn publication-format="print">0041-3771</issn><issn publication-format="electronic">3034-6061</issn><publisher><publisher-name xml:lang="en">The Russian Academy of Sciences</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">677470</article-id><article-id pub-id-type="doi">10.31857/S0041377124050071</article-id><article-id pub-id-type="edn">DUNSPQ</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>Articles</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>Статьи</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">Hypochlorous acid – a potential secondary messenger in the process of neutrophils’ respiratory burst development</article-title><trans-title-group xml:lang="ru"><trans-title>Хлорноватистая кислота – потенциальный вторичный мессенджер в процессе развития респираторного взрыва нейтрофилов</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Semenkova</surname><given-names>G. N.</given-names></name><name xml:lang="ru"><surname>Семенкова</surname><given-names>Г. Н.</given-names></name></name-alternatives><address><country country="BY">Belarus</country></address><email>n.amaegberi@gmail.com</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Zholnerevich</surname><given-names>I. I.</given-names></name><name xml:lang="ru"><surname>Жолнеревич</surname><given-names>И. И.</given-names></name></name-alternatives><address><country country="BY">Belarus</country></address><email>n.amaegberi@gmail.com</email><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Murina</surname><given-names>M. A.</given-names></name><name xml:lang="ru"><surname>Мурина</surname><given-names>М. А.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>n.amaegberi@gmail.com</email><xref ref-type="aff" rid="aff3"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Amaegberi</surname><given-names>N. V.</given-names></name><name xml:lang="ru"><surname>Амаэгбери</surname><given-names>Н. В.</given-names></name></name-alternatives><address><country country="BY">Belarus</country></address><email>n.amaegberi@gmail.com</email><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Roshchupkin</surname><given-names>D. I.</given-names></name><name xml:lang="ru"><surname>Рощупкин</surname><given-names>Д. И.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>n.amaegberi@gmail.com</email><xref ref-type="aff" rid="aff4"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Belarusian State Medical University</institution></aff><aff><institution xml:lang="ru">Белорусский государственный медицинский университет</institution></aff></aff-alternatives><aff-alternatives id="aff2"><aff><institution xml:lang="en">Belarusian State University</institution></aff><aff><institution xml:lang="ru">Белорусский государственный университет</institution></aff></aff-alternatives><aff-alternatives id="aff3"><aff><institution xml:lang="en">Lopukhin Federal Scientific and Clinical Center for Physical-Chemical Medicine of the Federal Medical and Biological Agency</institution></aff><aff><institution xml:lang="ru">Федеральный научно-клинический центр физико-химической медицины имени академика Ю.М. Лопухина Федерального медико-биологического агентства</institution></aff></aff-alternatives><aff-alternatives id="aff4"><aff><institution xml:lang="en">Pirogov Russian National Research Medical University</institution></aff><aff><institution xml:lang="ru">Российский национальный исследовательский медицинский университет им. Н.И. Пирогова</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2024-11-15" publication-format="electronic"><day>15</day><month>11</month><year>2024</year></pub-date><volume>66</volume><issue>5-6</issue><fpage>471</fpage><lpage>481</lpage><history><date date-type="received" iso-8601-date="2025-03-20"><day>20</day><month>03</month><year>2025</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2024, Russian Academy of Sciences</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2024, Российская академия наук</copyright-statement><copyright-year>2024</copyright-year><copyright-holder xml:lang="en">Russian Academy of Sciences</copyright-holder><copyright-holder xml:lang="ru">Российская академия наук</copyright-holder></permissions><self-uri xlink:href="https://vietnamjournal.ru/0041-3771/article/view/677470">https://vietnamjournal.ru/0041-3771/article/view/677470</self-uri><abstract xml:lang="en"><p>Hypochlorous acid and hypochlorite ions are formed in the halogenating cycle of myeloperoxidase, localized mainly in neutrophils, and play a primary role in antimicrobial protection. The paper presents the results of a study of the effect of exogenous HOCl/OCl<sup>–</sup> in micromolar concentrations on the mechanisms of the “respiratory burst” formation by neutrophils stimulated to phagocytosis. It is shown that this oxidizer is capable of stimulating the functional activity of neutrophils, which is expressed in an increase in the yield of reactive oxygen and chlorine species (ROСS) and secretory degranulation of cells. Enhancement of the “respiratory burst” is associated with activation of NADPH oxidase, PI-3K, MAP kinase ERK1/2 and a decrease in the contribution of intracellular myeloperoxidase to ROСS production by neutrophils. It was found that HOCl/OCl<sup>–</sup> in the studied concentrations is capable of inhibiting myeloperoxidase activity. It is suggested that hypochlorous acid should be considered as a new potential secondary messenger regulating neutrophil functions.</p></abstract><trans-abstract xml:lang="ru"><p>Хлорноватистая кислота и гипохлорит-ионы (HOCl/OCl<sup>–</sup>) образуются в галогенирующем цикле миелопероксидазы, локализованной преимущественно в нейтрофилах, и играют первостепенную роль в антимикробной защите. В работе представлены результаты исследования влияния экзогенных HOCl/OCl<sup>–</sup> в микромолярных концентрациях на механизмы формирования респираторного взрыва стимулированными к фагоцитозу нейтрофилами. Показано, что этот окислитель способен оказывать стимулирующее действие на функциональную активность нейтрофилов, что выражается в увеличении выхода активных форм кислорода и хлора (АФКХ) и секреторной дегрануляции клеток. Усиление респираторного взрыва связано с активацией НАДФН-оксидазы, ФИ-3К, MAP-киназ ERK1/2 и уменьшением вклада внутриклеточной миелопероксидазы в продукцию АФКХ нейтрофилами. Установлено, что HOCl/OCl<sup>– </sup>в исследуемых концентрациях способны ингибировать активность миелопероксидазы. Сделано предположение, что хлорноватистую кислоту следует рассматривать в качестве нового потенциального вторичного мессенджера, регулирующего функции нейтрофилов.</p></trans-abstract><kwd-group xml:lang="en"><kwd>hypochlorous acid</kwd><kwd>NaOCl</kwd><kwd>neutrophils</kwd><kwd>reactive oxygen and chlorine species</kwd><kwd>myeloperoxidase</kwd><kwd>secretory degranulation</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>нейтрофилы</kwd><kwd>хлорноватистая кислота</kwd><kwd>NaOCl</kwd><kwd>активные формы кислорода и хлора</kwd><kwd>миелопероксидаза</kwd><kwd>секреторная дегрануляция</kwd></kwd-group><funding-group><award-group><funding-source><institution-wrap><institution xml:lang="ru">Правительство Республики Беларусь</institution></institution-wrap><institution-wrap><institution xml:lang="en">Government of the Republic of Belarus</institution></institution-wrap></funding-source><award-id>20115801</award-id></award-group></funding-group></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Мурина М.А., Сергиенко В.И., Рощупкин Д.И. 1989. 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