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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">ssmu</journal-id><journal-title-group><journal-title xml:lang="ru">Бюллетень сибирской медицины</journal-title><trans-title-group xml:lang="en"><trans-title>Bulletin of Siberian Medicine</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">1682-0363</issn><issn pub-type="epub">1819-3684</issn><publisher><publisher-name>Siberian State Medical University, the Ministry of Healthcare of the Russian Federation</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.20538/1682-0363-2023-2-104-110</article-id><article-id custom-type="elpub" pub-id-type="custom">ssmu-5227</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>ОРИГИНАЛЬНЫЕ СТАТЬИ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>ORIGINAL PAPERS</subject></subj-group></article-categories><title-group><article-title>Прогностическое значение уровня белка CTLA-4 и его лиганда B7.2 у больных раком толстого кишечника</article-title><trans-title-group xml:lang="en"><trans-title>Prognostic value of the levels of CTLA-4 and its ligand B7.2 in patients with colorectal cancer</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>Четверяков</surname><given-names>А. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Chetveryakov</surname><given-names>A. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Четверяков Андрей Валерьевич – врач-хирург, аспирант, кафедра госпитальной хирургии, </p><p>672000, г. Чита, ул. Горького, 39а</p></bio><bio xml:lang="en"><p>39a, Gorkogo Str., Chita, 672000</p></bio><email xlink:type="simple">yasnogorsk94@gmail.com</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>Цепелев</surname><given-names>В. Л.</given-names></name><name name-style="western" xml:lang="en"><surname>Tsepelev</surname><given-names>V. L.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Цепелев Виктор Львович – д-р мед. наук, профессор, зав. кафедрой госпитальной хирургии, </p><p>672000, г. Чита, ул. Горького, 39а</p></bio><bio xml:lang="en"><p>39a, Gorkogo Str., Chita, 672000</p></bio><email xlink:type="simple">viktorcepelev@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Читинская государственная медицинская академия (ЧГМА)</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Chita State Medical Academy</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2023</year></pub-date><pub-date pub-type="epub"><day>09</day><month>07</month><year>2023</year></pub-date><volume>22</volume><issue>2</issue><fpage>104</fpage><lpage>110</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Четверяков А.В., Цепелев В.Л., 2023</copyright-statement><copyright-year>2023</copyright-year><copyright-holder xml:lang="ru">Четверяков А.В., Цепелев В.Л.</copyright-holder><copyright-holder xml:lang="en">Chetveryakov A.V., Tsepelev V.L.</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://bulletin.ssmu.ru/jour/article/view/5227">https://bulletin.ssmu.ru/jour/article/view/5227</self-uri><abstract><sec><title>Цель</title><p>Цель. Разработать программу для определения вероятности онкологической патологии толстого кишечника на основании оценки уровня белка CTLA-4 и его лиганда B7.2.</p></sec><sec><title>Материалы и методы</title><p>Материалы и методы. В исследование включены 44 пациента с колоректальным раком (КРР) и 25 больных с доброкачественными опухолями толстого кишечника. Контрольную группу составили 25 пациентов, оперированных в плановом порядке (пластика колостомы), сформированной ранее по поводу травмы толстой кишки. Концентрацию CTLA-4 и B7.2 определяли в сыворотке крови, а также в супернатантах гомогенатов ткани опухоли и лимфатических узлов с помощью метода проточной цитофлуометрии.</p></sec><sec><title>Результаты</title><p>Результаты. Установлено, что у пациентов с раком толстой кишки уровень CTLA-4 в сыворотке крови увеличивается в 2,77 раза в сравнении с группой контроля (p &lt; 0,001). Концентрация CTLA-4 в ткани новообразования у пациентов с КРР была выше аналогичного показателя группы контроля в 2,34 раза (p = 0,007). Концентрация лиганда B7.2 в сыворотке крови у пациентов с КРР превышала данный показатель в группе контроля в 2,51 раза (p = 0,002). Концентрация лиганда B7.2 в ткани опухоли у пациентов с КРР превышала таковую в группе контроля в 1,68 раза (p = 0,004). При анализе полученных данных определены параметры, которые имеют значимость в структуре диагностической модели. На основании этих параметров разработана компьютерная программа для определения вероятности наличия онкологической патологии толстого кишечника.</p></sec><sec><title>Заключение</title><p>Заключение. Полученные данные демонстрируют увеличение уровня CTLA-4 и его лиганда B7.2 в сыворотке крови и ткани опухоли у пациентов с колоректальным раком.</p></sec></abstract><trans-abstract xml:lang="en"><sec><title>Aim</title><p>Aim. To develop a computer program to determine the probability of colorectal cancer based on the assessment of the levels of CTLA-4 and its ligand B7.2.</p></sec><sec><title>Materials and methods</title><p>Materials and methods. The study included 44 patients with colorectal cancer (CRC) and 25 patients with benign tumors of the colon. The control group consisted of 25 individuals who had been operated for colon injury. We determined the levels of CTLA-4 and B7.2 in the blood serum and in the supernatants of tumor tissue and lymph node homogenates using flow cytofluorometry.</p></sec><sec><title>Results</title><p>Results. We found that the level of CTLA-4 in the blood serum increased by 2.77 times in CRC patients compared to the control group (p &lt; 0.001). The concentration of CTLA-4 in the tumor tissue in patients with CRC was 2.34 times higher than in the control group (p = 0.007). The concentration of the B7.2 ligand in the blood serum of patients with CRC exceeded this parameter in the control group by 2.51 times (p = 0.002). The concentration of B7.2 in the tumor tissue of CRC patients was 1.68 times higher (p = 0.004) than in the control group. The analysis of the obtained data determined the parameters that have prognostic value in the structure of the diagnostic model. Using these parameters, we developed a computer program to determine the probability of CRC in the patient.</p></sec><sec><title>Conclusion</title><p>Conclusion. The data obtained demonstrate an increase in the levels of CTLA-4 and its ligand B7.2 in the serum and tumor tissue of patients with CRC.</p></sec></trans-abstract><kwd-group xml:lang="ru"><kwd>иммунные контрольные точки</kwd><kwd>CTLA-4</kwd><kwd>B7.2</kwd><kwd>колоректальный рак</kwd></kwd-group><kwd-group xml:lang="en"><kwd>immune checkpoints</kwd><kwd>CTLA-4</kwd><kwd>B7.2</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">Bray F., Ferlay J., Soerjomataram I., Siegel R.L., Torre L.A., Jemal A. Global cancer statistics 2018: GLOBOCAN estimates of incidence and mortality worldwide for 36 cancers in 185 countries. CA Cancer J. Clin. 2018;68(6):394–424. DOI: 10.3322/caac.21492.</mixed-citation><mixed-citation xml:lang="en">Bray F., Ferlay J., Soerjomataram I., Siegel R.L., Torre L.A., Jemal A. 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