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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">mes</journal-id><journal-title-group><journal-title xml:lang="ru">Экстремальная биомедицина</journal-title><trans-title-group xml:lang="en"><trans-title>Extreme Medicine</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">3033-8964</issn><issn pub-type="epub">3033-8972</issn><publisher><publisher-name>Centre for Strategic Planning of the Federal Medical and Biological Agency</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.47183/mes.2022.027</article-id><article-id custom-type="elpub" pub-id-type="custom">mes-178</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>ОРИГИНАЛЬНОЕ ИССЛЕДОВАНИЕ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>ORIGINAL RESEARCH</subject></subj-group></article-categories><title-group><article-title>Транскрипционная активность генов ДНК-метилтрансфераз у жителей уральского региона, подвергшихся хроническому радиационному воздействию</article-title><trans-title-group xml:lang="en"><trans-title>Transcriptional activity of DNA-methyltransferase genes in the chronically exposed residents of the ural region</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Никифоров</surname><given-names>В. С.</given-names></name><name name-style="western" xml:lang="en"><surname>Nikiforov</surname><given-names>V. S.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Владислав Сергеевич Никифоров</p><p>ул. Воровского, д. 68, корп. А, г. Челябинск, 454141</p></bio><bio xml:lang="en"><p>Vladislav S. Nikiforov</p><p>Vorovskogo, 68, korp. 1, Chelyabinsk, 454141</p></bio><email xlink:type="simple">nikiforovx@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Блинова</surname><given-names>Е. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Blinova</surname><given-names>E. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>г. Челябинск</p></bio><bio xml:lang="en"><p>Chelyabinsk</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Аклеев</surname><given-names>A. B.</given-names></name><name name-style="western" xml:lang="en"><surname>Akleyev</surname><given-names>A. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>г. Челябинск</p></bio><bio xml:lang="en"><p>Chelyabinsk</p></bio><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Уральский научно-практический центр радиационной медицины Федерального медико-биологического агентства;&#13;
Челябинский государственный университет</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Urals Research Center for Radiation Medicine of the Federal Medical Biological Agency;&#13;
Chelyabinsk State Universit</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2022</year></pub-date><pub-date pub-type="epub"><day>27</day><month>10</month><year>2024</year></pub-date><volume>24</volume><issue>3</issue><fpage>44</fpage><lpage>49</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Никифоров В.С., Блинова Е.А., Аклеев A.B., 2024</copyright-statement><copyright-year>2024</copyright-year><copyright-holder xml:lang="ru">Никифоров В.С., Блинова Е.А., Аклеев A.B.</copyright-holder><copyright-holder xml:lang="en">Nikiforov V.S., Blinova E.A., Akleyev A.V.</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.extrememedicine.ru/jour/article/view/178">https://www.extrememedicine.ru/jour/article/view/178</self-uri><abstract><p>/</p><p>Помимо повреждения генетического аппарата клетки, ионизирующее излучение способно приводить к эпигенетическим изменениям. Распространенной эпигенетической модификацией является метилирование ДНК, играющее важную роль в регуляции клеточных процессов. Метилирование ДНК происходит в последовательностях, богатых CpG-динуклеотидами, и осуществляется при помощи ферментов ДНК-метилтрансфераз. Целью работы было изучить экспрессию мРНК генов ДНК-метилтрансфераз (DNMT1, DNMT3A, DNMT3B) в отдаленные сроки у лиц, подвергшихся хроническому радиационному облучению на р. Тече. Обследование 112 человек было проведено спустя более чем 65 лет после начала хронического облучения. Средняя накопленная доза облучения красного костного мозга составляла 782,0 ± 82,3 мГр, а средняя накопленная доза облучения тимуса и периферических лимфоидных органов — 93,2 ± 13,6 мГр. Возраст людей на время проведения обследования составил 67,9 ± 0,8 лет (54–83 года). Оценку относительного содержания мРНК исследуемых генов проводили с использованием метода полимеразной цепной реакции в реальном времени. Установлена прямая корреляция между экспрессией мРНК гена DNMT1 и дозой облучения красного костного мозга (p = 0,04), тимуса и периферических лимфоидных органов (p = 0,02), а также мощностью дозы облучения этих органов (p = 0,05, p = 0,04 соответственно) в период максимального радиационного воздействия. У облученных лиц в диапазоне больших доз (более 1000 мГр) наблюдается значимое увеличение экспрессии мРНК гена DNMT1 относительно группы сравнения (p = 0,02). Полученные результаты могут свидетельствовать о вовлеченности гена DNMT1 в изменение эпигенетического статуса у людей, подвергшихся хроническому радиационному воздействию в отдаленные сроки.</p></abstract><trans-abstract xml:lang="en"><p>In addition to damaging the genetic apparatus of the cell, ionizing radiation can cause epigenetic alterations. DNA methylation that plays a vital part in regulation of cellular processes is a common epigenetic modification. DNA methylation ensured by DNA methyltransferases occurs in the CpG-rich sequences. The study was aimed to assess mRNA expression of genes encoding DNA methyltransferases (DNMT1, DNMT3A, DNMT3B) in the chronically exposed individuals who live along the River Techa over a long-term period. A total of 112 people were examined more than 65 years after the beginning of chronic exposure. The average accumulated dose to red bone marrow (RBM) was 782.0 ± 82.3 mGy, and the average accumulated dose to thymus and peripheral lymphoid organs was 93.2 ± 13.6 mGy. The subjects' age at the time of examination was 67.9 ± 0.8 years (54–83 years). The relative mRNA levels for the studied genes were assessed by real- time polymerase chain reaction (real-time PCR). mRNA expression of DNMT1 correlated positively with the dose to RBM (p = 0.04), thymus and peripheral lymphoid organs (p = 0.02), as well as with the dose rate in these organs (p = 0.05, p = 0.04, respectively) during the period of the highest levels of radiation exposure. In individuals exposed in the high dose range (over 1000 mGy) there was a significant increase in the expression of DNMT1 mRNA compared to the comparison group (p = 0.02). The findings may indicate the DNMT1 gene involvement in epigenetic alterations that occur in the chronically exposed people in the long term.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>: экспрессия генов</kwd><kwd>хроническое облучение</kwd><kwd>метилирование ДНК</kwd><kwd>река Теча</kwd><kwd>малые дозы</kwd></kwd-group><kwd-group xml:lang="en"><kwd>gene expression</kwd><kwd>chronic radiation exposure</kwd><kwd>DNA methylation</kwd><kwd>Techa River</kwd><kwd>low doses</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Работа выполнена при финансовой поддержке Федерального медико-биологического агентства России (Государственный контракт № 27.501.21.2 от 11 июня 2021 г.).</funding-statement><funding-statement xml:lang="en">The study was supported by the Federal Medical Biological Agency of Russia (Government contract № 27.501.21.2 of June, 11 2021).</funding-statement></funding-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Arand J, Spieler D, Karius T, Branco MR, Meilinger D, Meissner A, et al. 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