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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">medbio</journal-id><journal-title-group><journal-title xml:lang="ru">Медико-биологические проблемы жизнедеятельности</journal-title><trans-title-group xml:lang="en"><trans-title>Medical and Biological Problems of Life Activity</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2074-2088</issn><publisher><publisher-name>Республиканский научно-практический центр радиационной медицины и экологии человека</publisher-name></publisher></journal-meta><article-meta><article-id custom-type="elpub" pub-id-type="custom">medbio-239</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>КЛИНИЧЕСКАЯ МЕДИЦИНА</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>CLINICAL MEDICINE</subject></subj-group></article-categories><title-group><article-title>Оценка влияния перинатальных и интранатальных факторов на количество копий ТРЭК/КРЭК у недоношенных новорожденных</article-title><trans-title-group xml:lang="en"><trans-title>Assessment of the Influence of Perinatal and Intranatal Factors on the Number of TREC/ KREC Copies in Premature Infants</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>Полякова</surname><given-names>Е. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Polyakova</surname><given-names>E. A.</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"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Берестень</surname><given-names>С. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Beresten</surname><given-names>S. A.</given-names></name></name-alternatives><email xlink:type="simple">noemail@neicon.ru</email><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Стёганцева</surname><given-names>М. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Stegantseva</surname><given-names>M. V.</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"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Гурьянова</surname><given-names>И. Е.</given-names></name><name name-style="western" xml:lang="en"><surname>Guryanova</surname><given-names>I. E.</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"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Луцкович</surname><given-names>Д. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Lutsckovich</surname><given-names>D. V.</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"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Белевцев</surname><given-names>М. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Belevtsev</surname><given-names>M. V.</given-names></name></name-alternatives><email xlink:type="simple">noemail@neicon.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff xml:lang="ru" id="aff-1"><institution>ГУ «РНПЦ детской онкологии, гематологии и иммунологии»</institution><country>Russian Federation</country></aff><aff xml:lang="ru" id="aff-2"><institution>ГУ «РНПЦ «Мать и дитя»</institution><country>Russian Federation</country></aff><pub-date pub-type="collection"><year>2021</year></pub-date><pub-date pub-type="epub"><day>02</day><month>03</month><year>2023</year></pub-date><volume>0</volume><issue>2</issue><fpage>121</fpage><lpage>127</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Полякова Е.А., Берестень С.А., Стёганцева М.В., Гурьянова И.Е., Луцкович Д.В., Белевцев М.В., 2023</copyright-statement><copyright-year>2023</copyright-year><copyright-holder xml:lang="ru">Полякова Е.А., Берестень С.А., Стёганцева М.В., Гурьянова И.Е., Луцкович Д.В., Белевцев М.В.</copyright-holder><copyright-holder xml:lang="en">Polyakova E.A., Beresten S.A., Stegantseva M.V., Guryanova I.E., Lutsckovich D.V., Belevtsev M.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://medbio.ejournal.by/jour/article/view/239">https://medbio.ejournal.by/jour/article/view/239</self-uri><abstract><p>В данном исследовании были определены количественные значения кольцевых фрагментов ДНК Т и В-клеточного рецепторов (ТРЭК и КРЭК) в периферической крови 115 недоношенных новорожденных со сроком гестации 23,4-37,0 недель. Показано, что перинатальные и интаранатальные факторы, такие как анамнестические, акушерско-гинекологические осложнения течения беременности, тип родоразрешения, одноплодная и многоплодная беременность не оказывают значимого влияния на количество копий ТРЭК и КРЭК в периферической крови недоношенных детей, следовательно, не оказывают значимого влияния на функциональное состояние иммунитета в период новорожденности.</p></abstract><trans-abstract xml:lang="en"><p>This study quantified T and B cell receptor DNA ring fragments (TREC and KREC) in the peripheral blood of 115 preterm infants with gestational ages of 23,4-37,0 weeks. It has been shown that perinatal and intaranatal factors, such as anamnestic, obstetric and gynecological, complications of the course of pregnancy, type of delivery, singleton and multiple pregnancies do not have a significant effect on the number of TREC/KREC copies in the peripheral blood of premature infants, therefore, do not have a significant effect on functional state of immunity during the neonatal period.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>недоношенность</kwd><kwd>ТРЭК</kwd><kwd>КРЭК</kwd><kwd>интранатальные факторы</kwd><kwd>перинатальные факторы</kwd><kwd>репродуктивные потери</kwd><kwd>тип родоразрешения</kwd></kwd-group><kwd-group xml:lang="en"><kwd>prematurity</kwd><kwd>TREC</kwd><kwd>KREC</kwd><kwd>intaranatal factors</kwd><kwd>perinatal factors</kwd><kwd>reproductive loss</kwd><kwd>type of delivery</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">Simultaneous quantification of recent thymic T-cell and bone marrow B-cell emigrants in patients with primary immunodeficiency undergone to stem cell transplantation / А. 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