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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">mimmun</journal-id><journal-title-group><journal-title xml:lang="ru">Медицинская иммунология</journal-title><trans-title-group xml:lang="en"><trans-title>Medical Immunology (Russia)</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">1563-0625</issn><issn pub-type="epub">2313-741X</issn><publisher><publisher-name>SPb RAACI</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.15789/1563-0625-2013-5-399-412</article-id><article-id custom-type="elpub" pub-id-type="custom">mimmun-657</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>ОБЗОРЫ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>REVIEWS</subject></subj-group></article-categories><title-group><article-title>СВОБОДНАЯ ВНЕКЛЕТОЧНАЯ ДНК В НОРМЕ И ПРИ ПАТОЛОГИИ</article-title><trans-title-group xml:lang="en"><trans-title>FREE EXTRACELLULAR DNA IN NORMAL STATE AND UNDER PATHOLOGICAL CONDITIONS</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>Козлов</surname><given-names>В. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Kozlov</surname><given-names>V. А.</given-names></name></name-alternatives><bio xml:lang="ru"><p>д.м.н., профессор, академик РАМН, директор</p><p>630090, ул. Ядринцевская, 14. Тел.: 8 (383) 222-66-27. Факс: 8 (383) 222-70-28</p></bio><bio xml:lang="en"><p>PhD, MD, Professor, Full Member of Russian Academy of Medical Sciences, Director</p><p>630090, Yadrintsevskaya str., 14. Phone: 7 (383) 222-66-27. Fax: 7 (383) 222-70-28</p></bio><email xlink:type="simple">vakoz40@yandex.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>ФГБУ «Научно-исследовательский институт клинической иммунологии» СО РАМН, г. Новосибирск</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Research Institute of Clinical Immunology, Russian Academy of Medical Sciences, Siberian Branch, Novosibirsk</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2013</year></pub-date><pub-date pub-type="epub"><day>25</day><month>07</month><year>2014</year></pub-date><volume>15</volume><issue>5</issue><fpage>399</fpage><lpage>412</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Козлов В.А., 2014</copyright-statement><copyright-year>2014</copyright-year><copyright-holder xml:lang="ru">Козлов В.А.</copyright-holder><copyright-holder xml:lang="en">Kozlov V.А.</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.mimmun.ru/mimmun/article/view/657">https://www.mimmun.ru/mimmun/article/view/657</self-uri><abstract/><trans-abstract xml:lang="en"><p>Abstract. The paper represents a synopsis of current publications concerning existence of free extracellular DNA. Such DNAs are not associated with cells of the organism, being revealed in nearly all body fluids. Recent data show that the cell-free DNA is determined in normal, healthy organism as well. Increased level of free DNA plasma and serum are detectable in many diseases, including autoimmune disorders, malignant neoplasias, myocardial infarction, etc. In many cases, free DNA may be suggested as predictive markers for various distinct diseases, as well as worsening of their clinical course. Physiological role of free DNA is not yet clear, like as its importance in development of certain diseases. It was shown that free DNA may exert stimulatory or suppressive effects upon functions of immunocompetent cells. Free extracellular DNA may also perform an inducing role for autoimmune conditions. In addition, one may assume that free DNA may be a carrier of genetic information in the body between tumor and normal cells in the body, like as between normal cells in various organs and tissues.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>свободная внеклеточная ДНК</kwd><kwd>метилирование</kwd><kwd>злокачественные клетки</kwd></kwd-group><kwd-group xml:lang="en"><kwd>free extracellular DNA</kwd><kwd>methylation</kwd><kwd>malignant cells</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">Arnalich F., Codoceo R., L pez-Collazo E., Montiel C. Circulating cell-free mitochondrial DNA: a better early prognostic marker in patients with out-of-hospital cardiac arrest. Resuscitation, 2012, vol. 83, no. 7, pp. 162-173.</mixed-citation><mixed-citation xml:lang="en">Arnalich F., Codoceo R., L pez-Collazo E., Montiel C. 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