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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="other" dtd-version="1.2" xml:lang="en"><front><journal-meta><journal-id journal-id-type="publisher-id">Advances in Molecular Oncology</journal-id><journal-title-group><journal-title xml:lang="en">Advances in Molecular Oncology</journal-title><trans-title-group xml:lang="ru"><trans-title>Успехи молекулярной онкологии</trans-title></trans-title-group></journal-title-group><issn publication-format="print">2313-805X</issn><issn publication-format="electronic">2413-3787</issn><publisher><publisher-name xml:lang="en">Publishing House ABV Press</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">414</article-id><article-id pub-id-type="doi">10.17650/2313-805X-2022-9-1-33-41</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></subject></subj-group></article-categories><title-group><article-title xml:lang="en">Whole transcriptome analysis of breast tumors during neoadjuvant chemotherapy: association with response to preoperative chemotherapy</article-title><trans-title-group xml:lang="ru"><trans-title>Полнотранскриптомный анализ опухоли молочной железы в процессе неоадъювантной химиотерапии: связь с ответом на предоперационную химиотерапию</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-8815-2786</contrib-id><name-alternatives><name xml:lang="en"><surname>Ibragimova</surname><given-names>M. K.</given-names></name><name xml:lang="ru"><surname>Ибрагимова</surname><given-names>М. К.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p><bold>Marina Konstantinovna Ibragimova</bold> </p><p>5 Kooperativny Str., Tomsk 634009</p><p>36 Lenin Prospekt, Tomsk 634050</p></bio><bio xml:lang="ru"><p><bold>Марина Константиновна Ибрагимова  </bold></p><p>634009 Томск, Кооперативный пер., 5</p><p>634050 Томск, проспект Ленина, 36</p></bio><email>imk1805@yandex.ru</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/0000-0001-7419-4512</contrib-id><name-alternatives><name xml:lang="en"><surname>Tsyganov</surname><given-names>M. M.</given-names></name><name xml:lang="ru"><surname>Цыганов</surname><given-names>М. М.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>5 Kooperativny Str., Tomsk 634009</p></bio><bio xml:lang="ru"><p>634009 Томск, Кооперативный пер., 5</p></bio><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-0714-8927</contrib-id><name-alternatives><name xml:lang="en"><surname>Litviakov</surname><given-names>N. V.</given-names></name><name xml:lang="ru"><surname>Литвяков</surname><given-names>Н. В.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>5 Kooperativny Str., Tomsk 634009</p><p>87 Kommunistichesky Prospekt, Seversk 636039</p></bio><bio xml:lang="ru"><p>634009 Томск, Кооперативный пер., 5</p><p>636039 Северск, Коммунистический проспект, 87</p></bio><xref ref-type="aff" rid="aff1"/><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">ФГБНУ «Томский национальный исследовательский медицинский центр Российской академии наук»</institution></aff></aff-alternatives><aff-alternatives id="aff2"><aff><institution xml:lang="en">Тomsk State University</institution></aff><aff><institution xml:lang="ru">ФГАОУ ВО «Национальный исследовательский Томский государственный университет»</institution></aff></aff-alternatives><aff-alternatives id="aff3"><aff><institution xml:lang="en">Seversk Biophysical Research Center of the Federal Medical and Biological Agency</institution></aff><aff><institution xml:lang="ru">Северский биофизический научный центр Федерального медико-биологического агентства России</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2022-01-15" publication-format="electronic"><day>15</day><month>01</month><year>2022</year></pub-date><volume>9</volume><issue>1</issue><issue-title xml:lang="en"/><issue-title xml:lang="ru"/><fpage>33</fpage><lpage>41</lpage><history><date date-type="received" iso-8601-date="2022-03-18"><day>18</day><month>03</month><year>2022</year></date><date date-type="accepted" iso-8601-date="2022-03-18"><day>18</day><month>03</month><year>2022</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2022, Ibragimova M.K., Tsyganov M.M., Litviakov N.V.</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2022, Ибрагимова М.К., Цыганов М.М., Литвяков Н.В.</copyright-statement><copyright-year>2022</copyright-year><copyright-holder xml:lang="en">Ibragimova M.K., Tsyganov M.M., Litviakov N.V.</copyright-holder><copyright-holder xml:lang="ru">Ибрагимова М.К., 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://umo.abvpress.ru/jour/article/view/414">https://umo.abvpress.ru/jour/article/view/414</self-uri><abstract xml:lang="en"><p><bold>Introduction.</bold> Treatment of breast cancer often includes systemic neoadjuvant chemotherapy. The frequency of complete morphological response varies significantly depending on the molecular subtype of tumor. However, even in triple negative breast cancer, which is considered the most sensitive, it does not exceed 50 %. Therefore, the search for new genetic predictors of tumor response to preoperative treatment, as well as the assessment of tumor changes during neoadjuvant chemotherapy are highly relevant.<bold>Objective</bold> – to perform whole-transcriptome analysis of breast cancer during neoadjuvant chemotherapy depending on tumor response to preoperative treatment.<bold>Materials and methods.</bold> This study included 39 patients with luminal B HER2-positive (human epidermal growth factor receptor 2) breast cancer who received 6 to 8 cycles of neoadjuvant chemotherapy. We performed whole-transcriptome analysis of paired biopsy and surgical specimens using the Clariom™ S Assay, human (Affymetrix, USA).<bold>Results.</bold> We observed significant differences in the pretreatment expression of 166 genes (13 were up-regulated and 153 were down-regulated) between patients with objective response to therapy and those without it. Comparison of preand post-treatment expression profiles demonstrated 680 differentially expressed genes in patients with complete and partial response and 3240 differentially expressed genes in patients with stable or progressive disease. Venn diagram showed that patients with and without objective response to neoadjuvant chemotherapy shared 105 differentially expressed genes.<bold>Conclusion.</bold> We performed primary screening of genes in breast tumors before therapy and identified genes whose pretreatment expression differed significantly between patients with objective response to neoadjuvant chemotherapy and those without it. Further validation of these genes in an independent sample will allow the development of a genetic panel to evaluate the response to neoadjuvant chemotherapy. Assessment of changes in the expression of tumor genes during treatment depending on patient’s response to therapy can be useful for further development of a panel of genes, which will enable the evaluation of clinical response to chemotherapy, as well as identification of key cellular processes that change the activity of genes during therapy.</p></abstract><trans-abstract xml:lang="ru"><p><bold>Введение.</bold> Лечение рака молочной железы во многих случаях включает системную химиотерапию в неоадъювантном режиме. Согласно данным литературы частота полного морфологического ответа опухоли значительно варьирует в зависимости от ее молекулярного подтипа, однако даже при самом чувствительном, трижды негативном подтипе она не превышает 50 %. в связи с этим актуальны поиск генетических предикторов ответа опухоли на предоперационное лечение и оценка изменений, которые происходят в опухоли в процессе неоадъювантной химиотерапии.<bold>Цель исследования</bold> – проведение полнотранскриптомного анализа опухоли молочной железы в ходе неоадъювантной химиотерапии в зависимости от ответа на предоперационное лечение.<bold>Материалы и методы.</bold> В исследование включены 39 пациентов с раком молочной железы люминального в HER2-позитивного подтипа (human epidermal growth factor receptor 2, рецептор эпидермального фактора роста, тип 2), получавшие 6–8 курсов неоадъювантной химиотерапии. Были исследованы парные образцы биопсийного и операционного материала. Полнотранскриптомный микроматричный анализ проводился с использованием платформы Clariom™ S Assay, human (Affymetrix, США).<bold>Результаты.</bold> При сравнении экспрессионного профиля пациентов с наличием и отсутствием объективного ответа на лечение до проведения неоадъювантной химиотерапии было выявлено 166 дифференциально экспрессирующихся генов (13 up-regulated, 153 down-regulated). При сравнении экспрессионного профиля до и после лечения у больных с полной и частичной регрессией выявлено 680 дифференциально экспрессирующихся генов, а у больных со стабилизацией или прогрессированием – 3240 этих генов. С помощью построения диаграммы венна было показано, что 105 дифференциально экспрессирующихся генов являются общими для пациентов с наличием/отсутствием объективного ответа на неоадъювантную химиотерапию до и после лечения.<bold>Заключение.</bold> Был проведен первичный скрининг генов в опухоли молочной железы до лечения. Выявлены гены, экспрессия которых до терапии статистически значимо различалась у больных с объективным ответом на неоадъювантную химиотерапию и его отсутствием. Дальнейшая валидация данных генов на независимой выборке даст возможность разработать генетическую панель для определения ответа на неоадъювантную химиотерапию. Оценка изменения экспрессии опухолевых генов в ходе лечения у больных в зависимости от ответа на эту терапию может быть полезна для разработки в дальнейшем панели генов, выявление изменений которых позволит судить о клиническом ответе опухоли на химиотерапию, а также выделить ключевые клеточные процессы, меняющие активность генов в процессе терапии.</p></trans-abstract><kwd-group xml:lang="en"><kwd>breast cancer</kwd><kwd>neoadjuvant chemotherapy</kwd><kwd>whole-transcriptome analysis</kwd><kwd>tumor expression profile</kwd><kwd>differential gene expression</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>рак молочной железы</kwd><kwd>неоадъювантная химиотерапия</kwd><kwd>полнотранскриптомный анализ</kwd><kwd>экспрессионный профиль опухоли</kwd><kwd>дифференциально экспрессирующиеся гены</kwd></kwd-group><funding-group><funding-statement xml:lang="en">The work was carried out within the framework of the 2021–2023 competition for the scholarship of the President of the Russian Federation for young scientists and graduate students.</funding-statement><funding-statement xml:lang="ru">Работа выполнена в рамках конкурса 2021–2023 гг. на получение стипендии Президента РФ молодым ученым и аспирантам.</funding-statement></funding-group></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><citation-alternatives><mixed-citation xml:lang="en">1. 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