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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">bioph</journal-id><journal-title-group><journal-title xml:lang="ru">Biomedical Photonics</journal-title><trans-title-group xml:lang="en"><trans-title>Biomedical Photonics</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2413-9432</issn><publisher><publisher-name>Non-profit partnership for development of domestic photodynamic therapy and photodiagnosis</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.24931/2413-9432-2021-10-2-25-33</article-id><article-id custom-type="elpub" pub-id-type="custom">bioph-488</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 ARTICLES</subject></subj-group></article-categories><title-group><article-title>Противоопухолевая эффективность контактной лучевой терапии в комбинации с фотосенсибилизатором хлоринового ряда в эксперименте</article-title><trans-title-group xml:lang="en"><trans-title>Antitumor efficiency of contact radiotherapy in combination with a chlorin-based photosensitizer in experiment</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>Церковский</surname><given-names>Д. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Tzerkovsky</surname><given-names>D. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Лесной</p></bio><bio xml:lang="en"><p>Lesnoy</p></bio><email xlink:type="simple">tzerkovsky@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>Протопович</surname><given-names>Е. Л.</given-names></name><name name-style="western" xml:lang="en"><surname>Protopovich</surname><given-names>Ya. L.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Лесной</p></bio><bio xml:lang="en"><p>Lesnoy</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>Козловский</surname><given-names>Д. И.</given-names></name><name name-style="western" xml:lang="en"><surname>Kozlovsky</surname><given-names>D. I.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Лесной</p></bio><bio xml:lang="en"><p>Lesnoy</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>Суслова</surname><given-names>В. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Suslova</surname><given-names>V. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Лесной</p></bio><bio xml:lang="en"><p>Lesnoy</p></bio><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru">Республиканский научно-практический центр онкологии и медицинской радиологии им. Н.Н. Александрова<country>Беларусь</country></aff><aff xml:lang="en">N.N. Alexandrov National Cancer Centre of Belarus<country>Belarus</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2021</year></pub-date><pub-date pub-type="epub"><day>02</day><month>08</month><year>2021</year></pub-date><volume>10</volume><issue>2</issue><fpage>25</fpage><lpage>33</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Церковский Д.А., Протопович Е.Л., Козловский Д.И., Суслова В.А., 2021</copyright-statement><copyright-year>2021</copyright-year><copyright-holder xml:lang="ru">Церковский Д.А., Протопович Е.Л., Козловский Д.И., Суслова В.А.</copyright-holder><copyright-holder xml:lang="en">Tzerkovsky D.A., Protopovich Y.L., Kozlovsky D.I., Suslova V.A.</copyright-holder><license 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.pdt-journal.com/jour/article/view/488">https://www.pdt-journal.com/jour/article/view/488</self-uri><abstract><p>Авторами изучена противоопухолевая эффективность контактной лучевой терапии (КЛТ) в комбинации с фотосенсибилизатором (ФС) хлоринового ряда в эксперименте на лабораторных животных с перевивными опухолями. Работа выполнена на 50 лабораторных животных (белые беспородные крысы) с массой тела 250±50 г. В качестве опухолевых моделей использовали лимфосаркому Плисса (ЛСП) и альвеолярный рак печени РС (РС1), перевитые подкожно. ФС хлоринового ряда фотолон (РУП «Белмедпрепараты», Беларусь) вводился внутривенно капельно в дозе 2,5 мг/кг массы тела. Сеанс КЛТ проводили через 2,5 – 4 ч (в зависимости от опухолевой модели) после введения ФС с использованием аппарата «microSelectron HDR V3 Digital» («Nucletron», Нидерланды) с источником излучения 192–Ir в разовых очаговых дозах (РОД) 5 и 10 Гр. Все лабораторные животные, как в подгруппе с ЛСП, так и в подгруппе с РС1, были разделены на 5 групп по 5 особей в каждой: интактный контроль, КЛТ РОД 5 Гр, КЛТ РОД 10 Гр, ФС + КЛТ РОД 5Гр, ФС + КЛТ РОД 10 Гр. На модели ЛСП на 14–е сутки от начала воздействий средний объем опухоли (Vср ) в группах составил 26,31±5,81; 22,45±6,97; 18,99±4,86; 10,75±5,18 и 28,06±2,85 см3, соответственно (р˂0,05). Коэффициент торможения роста опухоли (ТРО) в опытных группах составил 14,67%; 27,82%; 59,14% и - 6,65%, соответственно. Частота полных регрессий опухолей через 60 суток после начала эксперимента составила 0%, 20%, 20%, 60% и 20%, соответственно. На модели РС1 на 14–е сутки от начала воздействий Vср . в группах составил 4,48±1,03; 0,80±0,21; 0,29±0,09; 0,19±0,07 и 0,32±0,08 см3, соответственно (р=0,009). Коэффициент ТРО в опытных группах составил 82,14%; 93,53%; 95,76% и 92,86%, соответственно. Частота полных регрессий опухолей через 60 суток после начала эксперимента составила 0%, 0%, 20%, 0% и 0%, соответственно. Результаты исследования показали, что введение ФС хлоринового ряда перед сеансом КЛТ увеличивает противоопухолевую эффективность лучевой терапии у животных с различными по гистологической структуре и характеру роста перевивными опухолями. Полученные данные свидетельствуют о перспективности дальнейших исследований радиосенсибилизирующих свойств ФС.</p></abstract><trans-abstract xml:lang="en"><p>Authors have studied the antitumor efficacy of contact radiation therapy (CRT) in combination with a chlorin-based photosensitizer (PS) in an experiment on laboratory animals with transplanted tumors. The experimental study was performed in 50 white outbred rats weighing 250±50 g. Subcutaneously transplanted Pliss lymphosarcoma (PLS) and alveolar liver cancer RS1 (RS1) were used as tumor models. Chlorinbased PS photolon (RUE «Belmedpreparaty», Republic Belarus) was injected intravenously at a dose of 2.5 mg/kg. The radiation sessions were carried out 2.5–4 hours (depending on the tumor model) after the administration of the PS using the device «microSelectron HDR V3 Digital» («Nucletron», Netherlands) with a 192-Ir radiation source in single focal doses 5 and 10 Gy. All laboratory animals (for PLS and RS1) were subdivided into 5 groups of 5 animals each: intact control, CRT 5 Gy, CRT 10 Gy, PS + CRT 5 Gy, PS + CRT 10 Gy. For the PLS tumor model – on the 14th day from the beginning of the experiment Vav. in groups were 26.31±5.81; 22.45±6.97; 18.99±4.86; 10.75±5.18 and 28.06±2.85 cm3, respectively (p˂0.05). The coefficients of tumor growth inhibition in the experimental groups were 14.67%, 27.82%, 59.14% and 6.65%, respectively. The frequency of complete tumor regressions 60 days after the start of the experiment was 0%, 20%, 20%, 60%, and 20%, respectively. On RS1 tumor model – on the 14th day from the beginning of the experiment Vav. in groups were 4.48±1.03; 0.80±0.21; 0.29±0.09; 0.19±0.07 and 0.32±0.08 cm3, respectively (p=0.009). The coefficients of tumor growth inhibition in the experimental groups were 82.14%, 93.53%, 95.76% and 92.86%, respectively. The frequency of complete tumor regressions 60 days after the start of the experiment was 0%, 0%, 20%, 0%, and 0%, respectively. Systemic administration of chlorin-based PS before the CRT session increases the antitumor efficacy of radiation therapy in animals with transplantable tumors of different histological structure and growth patterns. The data obtained indicate that further studies of the radiosensitizing properties of PS are promising.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>экспериментальное исследование</kwd><kwd>лабораторные животные</kwd><kwd>перевивные опухоли</kwd><kwd>контактная лучевая терапия</kwd><kwd>фотосенсибилизатор</kwd></kwd-group><kwd-group xml:lang="en"><kwd>experimental study</kwd><kwd>laboratory animals</kwd><kwd>transplanted tumors</kwd><kwd>contact radiotherapy</kwd><kwd>photosensitizer</kwd></kwd-group><funding-group xml:lang="ru"><funding-statement>Работа выполнена при финансовой поддержке Белорусского республиканского фонда фундаментальных исследований Национальной Академии наук Беларуси (грант № М19М-137, 2019–2021 гг.).</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">Церковский Д.А., Протопович Е.Л. 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