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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">medlit</journal-id><journal-title-group><journal-title xml:lang="ru">Гигиена и санитария</journal-title><trans-title-group xml:lang="en"><trans-title>Hygiene and Sanitation</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">0016-9900</issn><issn pub-type="epub">2412-0650</issn><publisher><publisher-name>Federal Scientific Center of Hygiene named after F.F. Erisman</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.47470/0016-9900-2021-100-3-285-289</article-id><article-id custom-type="elpub" pub-id-type="custom">medlit-1335</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>ПРОФИЛАКТИЧЕСКАЯ ТОКСИКОЛОГИЯ И ГИГИЕНИЧЕСКОЕ НОРМИРОВАНИЕ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>PREVENTIVE TOXICOLOGY AND HYGIENIC STANDARTIZATION</subject></subj-group></article-categories><title-group><article-title>Анализ токсичности нанокомпозита оксида железа, инкапсулированного в полимерную матрицу арабиногалактана</article-title><trans-title-group xml:lang="en"><trans-title>Analysis of toxicity of iron oxide nanocomposite encapsulated in a polymer matrix of arabinogalactan</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-0665-8060</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Титов</surname><given-names>Евгений Алексеевич</given-names></name><name name-style="western" xml:lang="en"><surname>Titov</surname><given-names>Eugeny A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Канд. биол. наук, ст. науч. сотр. лаб. биомоделирования и трансляционной медицины ФГБНУ «Восточно-Сибирский институт медико-экологических исследований», 665827, Ангарск.</p><p>e-mail: G57097@yandex.ru</p></bio><bio xml:lang="en"><p>MD, Ph.D. senior researcher of the Laboratory of biomodeling and translational medicine) of the East-Siberian Institute of Medical and Ecological Research, Angarsk, 665827, Russian Federation.</p><p>e-mail: g57097@yandex.ru</p></bio><email xlink:type="simple">g57097@yandex.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-1052-4601</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Соседова</surname><given-names>Л. М.</given-names></name><name name-style="western" xml:lang="en"><surname>Sosedova</surname><given-names>Larisa M.</given-names></name></name-alternatives><email xlink:type="simple">noemail@neicon.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-6100-6292</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Новиков</surname><given-names>М. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Novikov</surname><given-names>Mkhail A.</given-names></name></name-alternatives><email xlink:type="simple">noemail@neicon.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>ФГБНУ «Восточно-Сибирский институт медико-экологических исследований»</institution></aff><aff xml:lang="en"><institution>East-Siberian Institute of Medical and Ecological Research</institution></aff></aff-alternatives><pub-date pub-type="collection"><year>2021</year></pub-date><pub-date pub-type="epub"><day>15</day><month>04</month><year>2021</year></pub-date><volume>100</volume><issue>3</issue><fpage>285</fpage><lpage>289</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Титов Е.А., Соседова Л.М., Новиков М.А., 2021</copyright-statement><copyright-year>2021</copyright-year><copyright-holder xml:lang="ru">Титов Е.А., Соседова Л.М., Новиков М.А.</copyright-holder><copyright-holder xml:lang="en">Titov E.A., Sosedova L.M., Novikov M.A.</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://www.rjhas.ru/jour/article/view/1335">https://www.rjhas.ru/jour/article/view/1335</self-uri><abstract><sec><title>Введение</title><p>Введение. В работе представлены результаты анализа токсичности нанокомпозита Fe3O4, инкапсулированного в природную полимерную матрицу арабиногалактана (FeАГ). Проведено изучение формирования и развития биологического ответа организма на подострое введение данного нанопрепарата.</p></sec><sec><title>Материалы и методы</title><p>Материалы и методы. В работе использовали двадцать белых беспородных крыс-самцов с массой тела 200–220 г. Животным перорально в течение 10 дней вводили раствор исследуемого препарата в дозе 500 мкг железа на килограмм массы тела животного. Затем с использованием методов гистологического и иммуногистохимического анализа оценивали выраженность биологического ответа организма на введение данного нанокомпозита. Проводили анализ состояния ткани печени, почек и сенсомоторной коры головного мозга. В ткани сенсомоторной коры головного мозга определяли число нейронов с экспрессией проапоптотического белка каспаза 3, антиапоптотического белка bcl-2 и стресс-белка БТШ 70.</p></sec><sec><title>Результаты</title><p>Результаты. При внутрижелудочном введении подопытным животным отмечены нарушение нормальной реологии крови в ткани печени и почек, белковая дистрофия гепатоцитов, расширение периваскулярных пространств ткани головного мозга и снижение общего числа нейронов сенсомоторной коры головного мозга на единицу площади. Иммуногистохимический анализ ткани сенсомоторной коры головного мозга на экспрессию про- и антиапоптотических белков, а также экспрессию белка БТШ 70 показал резкое увеличение числа нейронов с экспрессией стресс-белка БТШ 70.</p></sec><sec><title>Заключение</title><p>Заключение. Характер выявленных изменений указывает на возникновение в организме компенсаторно-приспособительных реакций в ответ на воздействие FeАГ. Отсутствие экспрессии белка каспазы 3 позволяет исключить развитие апоптоза.</p></sec></abstract><trans-abstract xml:lang="en"><sec><title>Introduction</title><p>Introduction. The article presents a toxicity analysis of the Fe3O4 nanocomposite encapsulated in the natural polymer matrix of arabinogalactan (AG). A study was devoted to forming and developing the biological response of organisms to subacute administration of this nanocomposite.</p></sec><sec><title>Materials and methods</title><p>Materials and methods. White outbred male rats weighing 200-220 gr. were used in this study. For ten days, a test drug solution was administered orally to animals with a probe at a dose of 500 μg of iron per kilogram of body weight. Then, using histological and immunohistochemical analysis methods, the severity of the biological response of the organism to the introduction of this nanocomposite was evaluated. An analysis was made of the state of tissue of the liver, kidneys, and sensorimotor cortex. The number of neurons with the proapoptotic caspase three protein expression, anti-apoptotic bcl-2 protein, and HSP 70 stress protein was determined in the sensorimotor cortex tissue.</p></sec><sec><title>Results</title><p>Results. With intragastric administration to experimental animals, there was a violation of normal blood rheology in liver and kidney tissue, protein dystrophy of hepatocytes, expansion of perivascular spaces of brain tissue, and a decrease in the total number of sensorimotor cortex neurons per unit area. Immunohistochemical analysis of tissue of the sensorimotor cortex for expression of pro-and anti-apoptotic proteins and the expression of HSP 70 protein showed a sharp increase in the number of neurons with the expression of HSP 70 stress protein.</p></sec><sec><title>Discussion</title><p>Discussion. The nature of the detected changes indicates the occurrence of compensatory-adaptive reactions in the organism in response to the effect of FeAG. The lack of expression of caspase 3 protein eliminates the development of apoptosis.</p></sec></trans-abstract><kwd-group xml:lang="ru"><kwd>нанокомпозит</kwd><kwd>оксид железа</kwd><kwd>печень</kwd><kwd>головной мозг</kwd><kwd>БТШ 70</kwd></kwd-group><kwd-group xml:lang="en"><kwd>nanocomposite</kwd><kwd>iron oxide</kwd><kwd>liver</kwd><kwd>brain</kwd><kwd>HSP 70</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">Шилов И.П., Иванов А.В., Алексеев Ю.В., Румянцева В.Д., Рябов А.С., Щелкунова А.Е. и соавт. Новые подходы в тераностике новообразований на основе иттербиевых комплексов порфиринов. В кн.: Лазеры в науке, технике, медицине. Сборник научных трудов ХХIХ Международной конференции. 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