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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">Acta Naturae</journal-id><journal-title-group><journal-title xml:lang="en">Acta Naturae</journal-title><trans-title-group xml:lang="ru"><trans-title>Acta Naturae</trans-title></trans-title-group></journal-title-group><issn publication-format="print">2075-8251</issn><publisher><publisher-name xml:lang="en">Acta Naturae Ltd</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">20377</article-id><article-id pub-id-type="doi">10.32607/actanaturae.20377</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>Research Articles</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>Экспериментальные статьи</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">CNA Landscape of HER2-Negative Breast Cancer in Anthracycline-Based Neoadjuvant Chemotherapy Regimens</article-title><trans-title-group xml:lang="ru"><trans-title>CNA-ландшафт HER2-негативного рака молочной железы при использовании антрациклинсодержащих схем неоадъювантной химиотерапии</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Ibragimova</surname><given-names>Marina K.</given-names></name><name xml:lang="ru"><surname>Ибрагимова</surname><given-names>Марина Константиновна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>imk1805@yandex.ru</email><xref ref-type="aff" rid="aff1"/><xref ref-type="aff" rid="aff2"/><xref ref-type="aff" rid="aff3"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Kravtsova</surname><given-names>Ekaterina A.</given-names></name><name xml:lang="ru"><surname>Кравцова</surname><given-names>Екатерина Андреевна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>zdereva.e@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>Tsyganov</surname><given-names>Matvey M.</given-names></name><name xml:lang="ru"><surname>Цыганов</surname><given-names>Матвей Михайлович</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>tsyganovmm@yandex.ru</email><xref ref-type="aff" rid="aff1"/><xref ref-type="aff" rid="aff3"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Litviakov</surname><given-names>Nikolay V.</given-names></name><name xml:lang="ru"><surname>Литвяков</surname><given-names>Николай Васильевич</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>nvlitv72@yandex.ru</email><xref ref-type="aff" rid="aff1"/><xref ref-type="aff" rid="aff2"/><xref ref-type="aff" rid="aff3"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Cancer Research Institute, Tomsk National Research Medical Center of the Russian Academy of Sciences</institution></aff><aff><institution xml:lang="ru">Научно-исследовательский институт онкологии, Томский национальный исследовательский медицинский центр Российской академии наук</institution></aff></aff-alternatives><aff-alternatives id="aff2"><aff><institution xml:lang="en">National Research Tomsk State University</institution></aff><aff><institution xml:lang="ru">Национальный исследовательский Томский государственный университет</institution></aff></aff-alternatives><aff-alternatives id="aff3"><aff><institution xml:lang="en">Siberian State Medical University</institution></aff><aff><institution xml:lang="ru">Сибирский государственный медицинский университет Министерства здравоохранения Российской Федерации</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2023-10-30" publication-format="electronic"><day>30</day><month>10</month><year>2023</year></pub-date><volume>15</volume><issue>3</issue><issue-title xml:lang="en"/><issue-title xml:lang="ru"/><fpage>66</fpage><lpage>74</lpage><history><date date-type="received" iso-8601-date="2023-05-12"><day>12</day><month>05</month><year>2023</year></date><date date-type="accepted" iso-8601-date="2023-07-28"><day>28</day><month>07</month><year>2023</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2023, Ibragimova M.K., Kravtsova E.A., Tsyganov M.M., Litviakov N.V.</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2023, Ибрагимова М.К., Кравцова Е.А., Цыганов М.М., Литвяков Н.В.</copyright-statement><copyright-year>2023</copyright-year><copyright-holder xml:lang="en">Ibragimova M.K., Kravtsova E.A., Tsyganov M.M., Litviakov N.V.</copyright-holder><copyright-holder xml:lang="ru">Ибрагимова М.К., Кравцова Е.А., Цыганов М.М., Литвяков Н.В.</copyright-holder><ali:free_to_read xmlns:ali="http://www.niso.org/schemas/ali/1.0/"/><license><ali:license_ref xmlns:ali="http://www.niso.org/schemas/ali/1.0/">https://creativecommons.org/licenses/by/4.0</ali:license_ref></license></permissions><self-uri xlink:href="https://actanaturae.ru/2075-8251/article/view/20377">https://actanaturae.ru/2075-8251/article/view/20377</self-uri><abstract xml:lang="en"><p>Critical evaluation of how and when to include anthracyclines in preoperative chemotherapy is becoming more relevant in an era when the molecular genetic approach not only allows for the development of biologically targeted therapeutics, but also implies the ability to select the patients likely to benefit from certain cytotoxic agents. Changes in the copy number aberration (CNA) landscape of luminal B HER2-negative (HER2−) breast cancer (BC) during anthracycline-based neoadjuvant chemotherapy (NAC) regimens were studied in order to identify groups of potential CNA markers of objective response and CNA markers for predicting the development of hematogenous metastasis. Comparison of CNA frequencies depending on the response to NAC showed that objective response was observed in a larger number of deletions in the 11q22.3 and 11q23.1 loci (<italic>p</italic> = 0.004). Comparison of CNA frequencies in groups of patients after treatment showed that hematogenous metastasis was observed with a greater number of amplifications in the 9p22.2 locus (<italic>p</italic> = 0.003) and with a greater number of deletions in the 9p21.3 locus (<italic>p</italic> = 0.03). Potential predictive CNA markers of objective response and prognostic CNA markers of hematogenous metastasis in anthracycline-based NAC regimens have been identified.</p></abstract><trans-abstract xml:lang="ru"><p>Критическая оценка дозировки, сроков и способов включения антрациклинов в предоперационную химиотерапию становится более актуальной в эпоху, когда молекулярно-генетический подход позволяет не только разрабатывать биологически направленные терапевтические средства, но и выбирать пациентов, применение определенных цитотоксических агентов у которых приведет к желаемым эффектам. С целью выявления потенциальных CNA-маркеров объективного ответа и прогностических CNA-маркеров гематогенного метастазирования изучены изменения CNA-генетического ландшафта опухоли молочной железы люминального В HER2-негативного подтипа, вызванные применением антрациклинсодержащих схем неоадъювантной химиотерапии. Cравнение частот CNA в зависимости от ответа на неоадъювантную химиотерапию показало наличие объективного ответа при большем количестве делеций в локусах 11q22.3 и 11q23.1 (<italic>р</italic> = 0.004). Сравнение частот CNA в группах пациенток после лечения показало, что возникновение гематогенного метастазирования наблюдалось при большем количестве амплификаций в локусе 9p22.2 (<italic>р</italic> = 0.003) и большем количестве делеций в локусе 9p21.3 (<italic>р</italic> = 0.03). Выявлены потенциальные предиктивные CNA-маркеры объективного ответа и прогностические CNA-маркеры гематогенного метастазирования при применении антрациклинсодержащих схем неоадъювантной химиотерапии.</p></trans-abstract><kwd-group xml:lang="en"><kwd>breast cancer</kwd><kwd>CNA landscape</kwd><kwd>anthracycline-based regimens</kwd><kwd>neoadjuvant chemotherapy</kwd><kwd>prognosis</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>рак молочной железы</kwd><kwd>CNA-генетический ландшафт опухоли</kwd><kwd>антрациклинсодержащие схемы</kwd><kwd>неоадъювантная химиотерапия</kwd></kwd-group><funding-group><award-group><funding-source><institution-wrap><institution xml:lang="ru">Российский научный фонд</institution></institution-wrap><institution-wrap><institution xml:lang="en">Russian Science Foundation</institution></institution-wrap></funding-source><award-id>грант № 22-25-00499</award-id></award-group></funding-group></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Spring L.M., Bar Y., Isakoff S.J. // J. 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