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<article 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" xmlns:ali="http://www.niso.org/schemas/ali/1.0/" article-type="research-article" dtd-version="1.2" xml:lang="en"><front><journal-meta><journal-id journal-id-type="publisher-id">Russian Journal of Oncology</journal-id><journal-title-group><journal-title xml:lang="en">Russian Journal of Oncology</journal-title><trans-title-group xml:lang="ru"><trans-title>Российский онкологический журнал</trans-title></trans-title-group></journal-title-group><issn publication-format="print">1028-9984</issn><issn publication-format="electronic">2412-9119</issn><publisher><publisher-name xml:lang="en">Eco-Vector</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">691718</article-id><article-id pub-id-type="doi">10.17816/onco691718</article-id><article-id pub-id-type="edn">RTZOPU</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>Original Study Articles</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>Оригинальные исследования</subject></subj-group><subj-group subj-group-type="article-type"><subject>Research Article</subject></subj-group></article-categories><title-group><article-title xml:lang="en"><italic>In vitro</italic> antiproliferative activity and <italic>in vivo</italic> antitumor effect of 2,21-<italic>bis</italic>-[2-pyridinyl]methylidene hollongdione Dp-41 (2NK), a novel hollongdione derivative</article-title><trans-title-group xml:lang="ru"><trans-title>Антипролиферативная активность <italic>in vitro</italic> и противоопухолевый эффект <italic>in vivo</italic> нового производного холлонгдиона — 2,21-<italic>бис</italic>-[2-пиридинил]метилиденохоллонгдиона Dp-41 (2NK)</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0009-0009-2158-3915</contrib-id><name-alternatives><name xml:lang="en"><surname>Mikheenko</surname><given-names>Anastasia M.</given-names></name><name xml:lang="ru"><surname>Михеенко</surname><given-names>Анастасия Максимовна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>amiheenko7@gmail.com</email><xref ref-type="aff" rid="aff1"/><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-7176-505X</contrib-id><name-alternatives><name xml:lang="en"><surname>Smirnova</surname><given-names>Irina E.</given-names></name><name xml:lang="ru"><surname>Смирнова</surname><given-names>Ирина Евгеньевна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Cand. Sci. (Chemistry)</p></bio><bio xml:lang="ru"><p>канд. хим. наук</p></bio><email>si8081@yandex.ru</email><xref ref-type="aff" rid="aff3"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-5781-7925</contrib-id><contrib-id contrib-id-type="spin">8547-6770</contrib-id><name-alternatives><name xml:lang="en"><surname>Babayeva</surname><given-names>Gulyalek A.</given-names></name><name xml:lang="ru"><surname>Бабаева</surname><given-names>Гулалек Аманмырадовна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Cand. Sci. (Biology)</p></bio><bio xml:lang="ru"><p>канд. биолог. наук</p></bio><email>babaevagulyalek@gmail.com</email><xref ref-type="aff" rid="aff1"/><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Beejaimal</surname><given-names>Jaunita</given-names></name><name xml:lang="ru"><surname>Бихаймал</surname><given-names>Хаунита</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>jay.beejaimal4@gmail.com</email><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-2948-0872</contrib-id><contrib-id contrib-id-type="spin">6826-7694</contrib-id><name-alternatives><name xml:lang="en"><surname>Khan</surname><given-names>Irina I.</given-names></name><name xml:lang="ru"><surname>Хан</surname><given-names>Ирина Игоревна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Cand. Sci. (Biology)</p></bio><bio xml:lang="ru"><p>канд. биол. наук</p></bio><email>irinchek05@gmail.com</email><xref ref-type="aff" rid="aff1"/><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-5606-1588</contrib-id><name-alternatives><name xml:lang="en"><surname>Kazakova</surname><given-names>Oksana B.</given-names></name><name xml:lang="ru"><surname>Казакова</surname><given-names>Оксана Борисовна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Dr. Sci. (Chemistry), Professor</p></bio><bio xml:lang="ru"><p>д-р хим. наук, профессор</p></bio><email>obf@anrb.ru</email><xref ref-type="aff" rid="aff3"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-4006-9320</contrib-id><contrib-id contrib-id-type="spin">4552-1226</contrib-id><name-alternatives><name xml:lang="en"><surname>Pokrovsky</surname><given-names>Vadim S.</given-names></name><name xml:lang="ru"><surname>Покровский</surname><given-names>Вадим Сергеевич</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>MD, Dr. Sci. (Medicine), Professor</p></bio><bio xml:lang="ru"><p>д-р мед. наук, профессор</p></bio><email>pokrovskiy-vs@rudn.ru</email><xref ref-type="aff" rid="aff1"/><xref ref-type="aff" rid="aff2"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Blokhin National Medical Research Center of Oncology</institution></aff><aff><institution xml:lang="ru">Национальный медицинский исследовательский центр онкологии им. Н.Н. Блохина</institution></aff></aff-alternatives><aff-alternatives id="aff2"><aff><institution xml:lang="en">RUDN University</institution></aff><aff><institution xml:lang="ru">Российский университет дружбы народов им. П. Лумумбы</institution></aff></aff-alternatives><aff-alternatives id="aff3"><aff><institution xml:lang="en">Ufa Federal Research Centre of the Russian Academy of Science</institution></aff><aff><institution xml:lang="ru">Уфимский федеральный исследовательский центр Российской академии наук</institution></aff></aff-alternatives><pub-date date-type="preprint" iso-8601-date="2025-12-03" publication-format="electronic"><day>03</day><month>12</month><year>2025</year></pub-date><pub-date date-type="pub" iso-8601-date="2025-12-25" publication-format="electronic"><day>25</day><month>12</month><year>2025</year></pub-date><volume>30</volume><issue>3</issue><issue-title xml:lang="en"/><issue-title xml:lang="ru"/><fpage>234</fpage><lpage>246</lpage><history><date date-type="received" iso-8601-date="2025-09-30"><day>30</day><month>09</month><year>2025</year></date><date date-type="accepted" iso-8601-date="2025-11-24"><day>24</day><month>11</month><year>2025</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2025, Eco-Vector</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2025, Эко-Вектор</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="en">Eco-Vector</copyright-holder><copyright-holder xml:lang="ru">Эко-Вектор</copyright-holder><ali:free_to_read xmlns:ali="http://www.niso.org/schemas/ali/1.0/" start_date="2028-12-25"/><license><ali:license_ref xmlns:ali="http://www.niso.org/schemas/ali/1.0/">https://creativecommons.org/licenses/by-nc-nd/4.0</ali:license_ref></license></permissions><self-uri xlink:href="https://rjonco.com/1028-9984/article/view/691718">https://rjonco.com/1028-9984/article/view/691718</self-uri><abstract xml:lang="en"><p><bold>BACKGROUND: </bold>Natural tetracyclic triterpenes, such as dammarane-type triterpenes, have demonstrated diverse pharmacological activities, including significant anti-inflammatory and antitumor properties, making them promising candidates for novel antitumor agents. However, their limited bioavailability and inadequate effects have driven research into targeted structural modifications to enhance their biological activity.</p> <p><bold>AIM:</bold> This study aimed to evaluate the cytotoxic and antitumor activities of a new arylidene derivative of hollongdione: 2,21-<italic>bis</italic>-[2-pyridinyl]methylidene hollongdione.</p> <p><bold>METHODS:</bold> The cytotoxicity of the study derivative was evaluated using MTT assay. Flow cytometry was performed to assess cell cycle and apoptotic activities using ADAMII™ LS. The <italic>in vivo</italic> antitumor effect was evaluated using HCT116 human colon cancer xenograft models in <italic>Danio rerio</italic> embryos.</p> <p><bold>RESULTS:</bold> 2,21-<italic>bis</italic>-[2-pyridinyl]methylidene hollongdione Dp-41 (2NK) demonstrated cytotoxic activity in DU145 (0.70 ± 0.03 µM), HCT116 (0.99 ± 0.01 µM), Panc1 (0.20 ± 0.03 µM), and A549 (0.60 ± 0.04 µM) cell cultures. In the HCT116 human colon cancer xenograft model in <italic>Danio rerio</italic> embryos, it achieved 72% tumor growth inhibition, thus demonstrating antitumor activity.</p> <p><bold>CONCLUSION: </bold>Dp-41 (2NK) exhibited significant antiproliferative activity against prostate, colon, pancreatic, and lung cancer cell lines, as well as against HCT116 human colon cancer xenografts in <italic>Danio rerio</italic> embryos.</p></abstract><trans-abstract xml:lang="ru"><p><bold>Обоснование. </bold>Природные тетрациклические тритерпены, в частности даммаранового ряда, продемонстрировали многогранную фармакологическую активность, включая выраженные противовоспалительные и противоопухолевые свойства, что делает их привлекательными для разработки новых противоопухолевых препаратов. Однако часто их ограниченная биодоступность и недостаточный эффект стимулируют исследования направленной структурной модификации с целью усиления биологической активности.</p> <p><bold>Цель.</bold> Оценить цитотоксическую активность и противоопухолевый эффект нового арилиденового производного холлонгдиона — 2,21-<italic>бис</italic>-[2-пиридинил]метилиденохоллонгдиона.</p> <p><bold>Методы.</bold> Цитотоксичность исследуемого производного оценивали с помощью МТТ-теста. Анализ клеточного цикла и активности апоптоза проводили с помощью проточной цитометрии на приборе ADAMIITM-LS. Противоопухолевый эффект был исследован <italic>in vivo </italic>на моделях ксенографтов рака толстой кишки HCT116 на эмбрионах рыб <italic>Danio rerio</italic>.</p> <p><bold>Результаты.</bold> 2,21-<italic>бис</italic>-[2-пиридинил]метилиденохоллонгдион Dp-41 (2NK) продемонстрировал цитотоксическую активность на культурах клеток DU145 (0,7±0,03 µМ), HCT116 (0,99±0,01 µМ), PANC-1 (0,2±0,03 µМ) и А549 (0,6±0,04 µМ), а также противоопухолевую активность на модели ксенографтов рака толстой кишки человека HCT116 у эмбрионов <italic>Danio rerio</italic> при значении ТРО=72%.</p> <p><bold>Заключение. </bold>Dp-41 (2NK) демонстрирует высокую антипролиферативную активность в отношении клеток рака предстательной железы, толстой кишки, поджелудочной железы и рака лёгкого, а также ксенографтов рака толстой кишки человека HCT116 на эмбрионах рыб <italic>Danio rerio.</italic></p></trans-abstract><kwd-group xml:lang="en"><kwd>dammarane-type triterpenoids</kwd><kwd>arylidene derivatives</kwd><kwd>dipterocarpol</kwd><kwd>hollongdione</kwd><kwd>cytotoxicity</kwd><kwd>antitumor effect</kwd><kwd>cell cycle analysis</kwd><kwd>xenograft models of antitumor effect</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>даммарановые тритерпеноиды</kwd><kwd>арилиденовые производные</kwd><kwd>диптерокарпол</kwd><kwd>холлонгдион</kwd><kwd>цитотоксичность</kwd><kwd>противоопухолевый эффект</kwd><kwd>анализ клеточного цикла</kwd><kwd>модели ксенографтов для оценки противоопухолевого эффекта</kwd></kwd-group><funding-group><award-group><funding-source><institution-wrap><institution xml:lang="ru">Министерство науки и высшего образования РФ</institution></institution-wrap><institution-wrap><institution xml:lang="en">Ministry of Science and Higher Education of the Russian Federation</institution></institution-wrap></funding-source><award-id>075-01551-23-00</award-id></award-group></funding-group></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Sung H, Ferlay J, Siegel RL, et al. 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