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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">oncotomsk</journal-id><journal-title-group><journal-title xml:lang="ru">Сибирский онкологический журнал</journal-title><trans-title-group xml:lang="en"><trans-title>Siberian journal of oncology</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">1814-4861</issn><issn pub-type="epub">2312-3168</issn><publisher><publisher-name>Tomsk National Research Medical Сепtеr of the Russian Academy of Sciences</publisher-name></publisher></journal-meta><article-meta><article-id custom-type="elpub" pub-id-type="custom">oncotomsk-27</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>ЛАБОРАТОРНЫЕ И ЭКСПЕРИМЕНТАЛЬНЫЕ ИССЛЕДОВАНИЯ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>LABORATORY AND EXPERIMENTAL STUDIES</subject></subj-group></article-categories><title-group><article-title>ИССЛЕДОВАНИЕ СООТНОШЕНИЯ ПРООКСИДАНТНОЙ И АНТИОКСИДАНТНОЙ СИСТЕМ ПРИ ОПУХОЛЯХ КИШЕЧНИКА</article-title><trans-title-group xml:lang="en"><trans-title>CORRELATION OF PRO-OXIDANT WITH ANTIOXIDANT SYSTEMS IN CASE OF COLORECTAL TUMORS</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>Зуйков</surname><given-names>С. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Zuikov</surname><given-names>S. А.</given-names></name></name-alternatives><bio xml:lang="ru"><p>83003, Украина, г. Донецк, пр. Ильича, 16</p></bio><bio xml:lang="en"><p>16, Illyicha Avenue, 83003-Donetsk</p></bio><email xlink:type="simple">83chem@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>Борзенко</surname><given-names>Б. Г.</given-names></name><name name-style="western" xml:lang="en"><surname>Borzenko</surname><given-names>B. G.</given-names></name></name-alternatives><bio xml:lang="ru"><p>83003, Украина, г. Донецк, пр. Ильича, 16</p></bio><bio xml:lang="en"><p>16, Illyicha Avenue, 83003-Donetsk</p></bio><email xlink:type="simple">83chem@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>Зуйкова</surname><given-names>О. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Zuikova</surname><given-names>О. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>83003, Украина, г. Донецк, пр. Ильича, 16</p></bio><bio xml:lang="en"><p>16, Illyicha Avenue, 83003-Donetsk</p></bio><email xlink:type="simple">83chem@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Донецкий национальный медицинский университет им. М. Горького» г. Донецк</institution><country>Украина</country></aff><aff xml:lang="en"><institution>Donetsk National Medical University, Donetsk</institution><country>Ukraine</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2014</year></pub-date><pub-date pub-type="epub"><day>07</day><month>02</month><year>2016</year></pub-date><volume>0</volume><issue>2</issue><fpage>24</fpage><lpage>27</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Зуйков С.А., Борзенко Б.Г., Зуйкова О.В., 2016</copyright-statement><copyright-year>2016</copyright-year><copyright-holder xml:lang="ru">Зуйков С.А., Борзенко Б.Г., Зуйкова О.В.</copyright-holder><copyright-holder xml:lang="en">Zuikov S.А., Borzenko B.G., Zuikova О.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.siboncoj.ru/jour/article/view/27">https://www.siboncoj.ru/jour/article/view/27</self-uri><abstract><p>Исследована взаимосвязь обмена пуриновых нуклеотидов с антиоксидантной системой у больных раком толстой кишки, а также влияние ключевых ферментов распада пуринов на пул образования активных форм кислорода. В ходе исследования были определены ферментативные показатели прооксидантной системы: аденозиндезаминаза и ксантиноксидаза, а также уровень оксида азота. Показателем антирадикальной системы служили супероксиддисмутаза и глутатионпероксидаза. Было обследовано 22 больных колоректальным раком (КРР) I–IV стадий, в возрасте 40–59 лет. Установлено значимое повышение показателей прооксидантной системы в гомогенате опухолевой ткани относительно неизмененной ткани слизистой кишечника у больных КРР и неоднозначное изменение активности антиоксидантной системы в зависимости от стадии заболевания. Выявлено, что при окислительном стрессе и в условиях гипоксии на более поздних стадиях рака антиоксиданты могут способствовать лучшему выживанию опухолевых клеток и более быстрому прогрессированию опухоли.</p></abstract><trans-abstract xml:lang="en"><p>Correlation between purinenucleotides exchange and antioxidant system in patients with colorectal cancer (CC), as well as influence of key enzymes of purine decomposition on formation of active forms of oxygen were studied. During the process of study, enzymatic indicators of prooxidant system – adenosine deaminase and xanthineoxidase, as well as the level of nitric oxide were identified. Superoxidedismutase and glutathione peroxidase were the indicator of antiradical system. 22 patients aged 40–59 years with colorectal cancer of different stage were examined. A significant increase in indicators of prooxidant system in tissue homogenate of patients with CC and ambiguous changes in the activity of the antioxidant system, depending on the stage of the disease, were established. It was established that during the oxidative stress and in conditions of hypoxia, at the later stages of cancer, antioxidants may contribute to better survival ability of tumor cells and to more rapid tumor progression.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>ксантиноксидаза</kwd><kwd>аденозиндезаминаза</kwd><kwd>оксид азота</kwd><kwd>супероксиддисмутаза</kwd><kwd>глутатионпероксидаза</kwd><kwd>колоректальный рак</kwd></kwd-group><kwd-group xml:lang="en"><kwd>xanthine oxidase</kwd><kwd>adenosine deaminase</kwd><kwd>nitric oxide</kwd><kwd>superoxide dismutase</kwd><kwd>glutathione peroxidase</kwd><kwd>homogenate</kwd><kwd>colorectal cancer</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">Анисимов В.Н. Молекулярные и физиологические механизмы старения: в 2 т. СПб.: Наука. 2008. Т. 2. 434 с.</mixed-citation><mixed-citation xml:lang="en">Anisimov V.N. 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