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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="review-article" dtd-version="1.2" xml:lang="en"><front><journal-meta><journal-id journal-id-type="publisher-id">Tumors of female reproductive system</journal-id><journal-title-group><journal-title xml:lang="en">Tumors of female reproductive system</journal-title><trans-title-group xml:lang="ru"><trans-title>Опухоли женской репродуктивной системы</trans-title></trans-title-group></journal-title-group><issn publication-format="print">1994-4098</issn><issn publication-format="electronic">1999-8627</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">1435</article-id><article-id pub-id-type="doi">10.17650/1994-4098-2025-21-4-71-84</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>MAMMOLOGY. REVIEWS</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>МАММОЛОГИЯ. ОБЗОРНЫЕ СТАТЬИ</subject></subj-group><subj-group subj-group-type="article-type"><subject>Review Article</subject></subj-group></article-categories><title-group><article-title xml:lang="en">From clinical trials to routine practice: 7-year results of the monarchE randomized clinical trial and experience with the use of abemaciclib in hormone-dependent, HER2-negative, high-risk, early breast cancer</article-title><trans-title-group xml:lang="ru"><trans-title>От клинических исследований к рутинной практике: 7-летние результаты рандомизированного клинического исследования monarchE и опыт применения абемациклиба при гормонозависимом HER2-отрицательном раннем раке молочной железы высокого риска рецидива</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-1124-6802</contrib-id><name-alternatives><name xml:lang="en"><surname>Kolyadina</surname><given-names>Irina V.</given-names></name><name xml:lang="ru"><surname>Колядина</surname><given-names>Ирина Владимировна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Member of the RSOM Board, MD, PhD, Leading Researcher, Professor of the Department of Oncology and Palliative Medicine, Member of the ESMO, ASCO</p></bio><bio xml:lang="ru"><p>член РООМ, д.м.н., ведущий научный сотрудник, профессор кафедры онкологии и паллиативной медицины, член ESMO, ASCO</p></bio><email>irinakolyadina@yandex.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/0000-0002-4597-172X</contrib-id><name-alternatives><name xml:lang="en"><surname>Khokhlova</surname><given-names>S. V.</given-names></name><name xml:lang="ru"><surname>Хохлова</surname><given-names>С. В.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>irinakolyadina@yandex.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/0009-0000-3757-5025</contrib-id><name-alternatives><name xml:lang="en"><surname>Bikeev</surname><given-names>Yu. V.</given-names></name><name xml:lang="ru"><surname>Бикеев</surname><given-names>Ю. В.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>irinakolyadina@yandex.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/0000-0002-7303-7213</contrib-id><name-alternatives><name xml:lang="en"><surname>Zaytsev</surname><given-names>N. A.</given-names></name><name xml:lang="ru"><surname>Зайцев</surname><given-names>Н. А.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>irinakolyadina@yandex.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/0000-0002-0995-1801</contrib-id><name-alternatives><name xml:lang="en"><surname>Poddubnaya</surname><given-names>Irina V.</given-names></name><name xml:lang="ru"><surname>Поддубная</surname><given-names>Ирина Владимировна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>MD, PhD, Professor, Corresponding Member of the Russian Academy of Sciences, Vice-Rector of Academic Affairs and International Cooperation, Head of the Department of Oncology</p></bio><bio xml:lang="ru"><p>д.м.н., профессор, член-корреспондент РАН, проректор по учебной работе и международному сотрудничеству, заведующая кафедрой онкологии</p></bio><email>irinakolyadina@yandex.com</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">Russian Medical Academy of Postgraduate Education, Ministry of Health of Russia</institution></aff><aff><institution xml:lang="ru">ФГБОУ ДПО «Российская медицинская академия непрерывного профессионального образования» Минздрава России</institution></aff></aff-alternatives><aff-alternatives id="aff2"><aff><institution xml:lang="en">V. I. Kulakov National Medical Research Center of Obstetrics, Gynecology, and Perinatology, Ministry of Health of Russia</institution></aff><aff><institution xml:lang="ru">ФГБУ «Национальный медицинский исследовательский центр акушерства, гинекологии и перинатологии им. акад. В. И. Кулакова» Минздрава России</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2026-01-20" publication-format="electronic"><day>20</day><month>01</month><year>2026</year></pub-date><volume>21</volume><issue>4</issue><issue-title xml:lang="en"/><issue-title xml:lang="ru"/><fpage>71</fpage><lpage>84</lpage><history><date date-type="received" iso-8601-date="2026-01-23"><day>23</day><month>01</month><year>2026</year></date><date date-type="accepted" iso-8601-date="2026-01-23"><day>23</day><month>01</month><year>2026</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2026, Kolyadina I.V., Khokhlova S.V., Bikeev Y.V., Zaytsev N.A., Poddubnaya I.V.</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2026, Колядина И.В., Хохлова С.В., Бикеев Ю.В., Зайцев Н.А., Поддубная И.В.</copyright-statement><copyright-year>2026</copyright-year><copyright-holder xml:lang="en">Kolyadina I.V., Khokhlova S.V., Bikeev Y.V., Zaytsev N.A., Poddubnaya I.V.</copyright-holder><copyright-holder xml:lang="ru">Колядина И.В., Хохлова С.В., Бикеев Ю.В., Зайцев Н.А., Поддубная И.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://ojrs.abvpress.ru/ojrs/article/view/1435">https://ojrs.abvpress.ru/ojrs/article/view/1435</self-uri><abstract xml:lang="en"><p>The 7-year results of the monarchE randomized clinical trial of adjuvant endocrine therapy escalation with abemaciclib in patients with hormone-dependent, HER2-negative, high-risk, early breast cancer. Three-year experience with the use of abemaciclib in 64 patients with hormone-dependent, HER2-negative, early breast cancer in real-world practice is analyzed, and the criteria for selecting combination endocrine therapy and the safety profile of treatment escalation are assessed. An indirect comparison of data from the Russian analysis and the randomized clinical monarchE trial of adjuvant endocrine therapy escalation in patients with a high risk of recurrence is conducted. Clinical cases of abemaciclib use in routine practice in Russian patients are presented.</p></abstract><trans-abstract xml:lang="ru"><p>Представлены 7-летние результаты рандомизированного клинического исследования monarchE по эскалации адъювантной эндокринотерапии с абемациклибом у пациентов с ранним гормонозависимым HER2-отрицательным раком молочной железы высокого риска рецидива. Проанализирован 3-летний опыт применения абемациклиба у 64 больных в реальной практике при раннем гормонозависимом HER2-отрицательном раке молочной железы, оценены критерии выбора комбинированной эндокринотерапии, а также профиль безопасности при эскалации лечения. Проведено непрямое сравнение данных российского анализа и рандомизированного клинического исследования monarchE по эскалации адъювантной эндокринотерапии у пациентов группы высокого риска рецидива. Представлены клинические случаи применения абемациклиба в рутинной практике у российских пациенток.</p></trans-abstract><kwd-group xml:lang="en"><kwd>hormone-dependent early breast cancer</kwd><kwd>micrometastases of breast cancer</kwd><kwd>dormant cancer cells</kwd><kwd>combination adjuvant endocrine therapy</kwd><kwd>CDK4 / 6 inhibitor</kwd><kwd>abemaciclib</kwd><kwd>diarrhea while taking abemaciclib</kwd><kwd>abemaciclib-induced pneumonitis</kwd><kwd>abemaciclib in routine practice</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>гормонозависимый ранний рак молочной железы</kwd><kwd>микрометастазы при раке молочной железы</kwd><kwd>спящие опухолевые клетки</kwd><kwd>комбинированная адъювантная эндокринотерапия</kwd><kwd>ингибитор CDK4 / 6</kwd><kwd>абемациклиб</kwd><kwd>диарея при приеме абемациклиба</kwd><kwd>абемациклиб-индуцированный пневмонит</kwd><kwd>абемациклиб в рутинной практике</kwd></kwd-group><funding-group/></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Schiavon G., Smith I. Status of adjuvant endocrine therapy for breast. Breast Cancer Res 2014;16:206. Available at: http://breast-cancer-research.com/content/16/2/206.</mixed-citation></ref><ref id="B2"><label>2.</label><mixed-citation>Early Breast Cancer Trialists’ Collaborative Group (EBCTCG). Effects of adjuvant tamoxifen and of cytotoxic therapy on mortality in early breast cancer. An overview of 61 randomized trials among 28,896 women. N Engl J Med 1988;319:1681–92.</mixed-citation></ref><ref id="B3"><label>3.</label><mixed-citation>Early Breast Cancer Trialists’ Collaborative Group (EBCTCG). Aromatase inhibitors versus tamoxifen in early breast cancer: patient-level meta-analysis of the randomised trials. Lancet 2015;386:1341–52. DOI: 10.1016/S0140-6736(15)61074-1</mixed-citation></ref><ref id="B4"><label>4.</label><mixed-citation>Chaikovsky A.C., Sage J. Beyond the cell cycle: enhancing the immune surveillance of tumors via CDK4/6 inhibition. Mol Cancer Res 2018;16:1454–7. DOI: 10.1158/1541-7786.MCR-18-0201</mixed-citation></ref><ref id="B5"><label>5.</label><mixed-citation>Pan H., Gray R., Braybrooke J. et al. 20-year risks of breast-cancer recurrence after stopping endocrine therapy at 5 years. N Engl J Med 2017;377(19):1836–46. DOI: 10.1056/NEJMoa1701830</mixed-citation></ref><ref id="B6"><label>6.</label><mixed-citation>Davies C., Pan H., Godwin J. et al. Long-term effects of continuing adjuvant tamoxifen to 10 years versus stopping at 5 years after diagnosis of estrogen receptor-positive breast cancer: ATLAS, a randomised trial. Lancet 2013;381(9869):805–16. DOI: 10.1016/S0140-6736(12)61963-1</mixed-citation></ref><ref id="B7"><label>7.</label><mixed-citation>Rea D.W., Gray R., Bowden S. et al. Overall and subgroup findings of the aTTom trial: a randomized comparison of continuing adjuvant tamoxifen to 10 years compared to stopping after 5 years in 6953 women with ER positive or ER untested early breast cancer. Eur J Cancer 2013;49:S298–449.</mixed-citation></ref><ref id="B8"><label>8.</label><mixed-citation>Clement Z., Kollias J., Bingham J. et al. Extended duration of adjuvant aromatase inhibitor in breast cancer: a meta-analysis of randomized controlled trials. Gland Surg 2018 Oct;7(5):449–57. DOI: 10.21037/gs.2018.08.03</mixed-citation></ref><ref id="B9"><label>9.</label><mixed-citation>Pagani O., Francis P., Fleming G. et al. Absolute improvements in freedom from distant recurrence to tailor adjuvant endocrine therapies for premenopausal women: results from TEXT and SOFT. J Clin Oncol 2020;38(12):1293–303. DOI: 10.1200/JCO.18.01967</mixed-citation></ref><ref id="B10"><label>10.</label><mixed-citation>Hyun-Ah K. Adding ovarian suppression to tamoxifen for premenopausal breast cancer: a randomized phase III trial. DOI: 10.1200/JCO.19.00126</mixed-citation></ref><ref id="B11"><label>11.</label><mixed-citation>Toi M., Boyle F., Im Y.-H. et al. Adjuvant abemaciclib combined with endocrine therapy: efficacy results in monarchE cohort 1. Oncologist 2023;28(1):e77–81. DOI: 10.1093/oncolo/oyac234</mixed-citation></ref><ref id="B12"><label>12.</label><mixed-citation>Johnston S., Toi M., O’Shaughnessy J. et al. Abemaciclib plus endocrine therapy for hormone receptor-positive, HER2-negative, node-positive, high-risk early breast cancer (monarchE): results from a preplanned interim analysis of a randomised, open-label, phase 3 trial. Lancet Oncol 2023;24(1):77–90. DOI: 10.1016/S1470-2045(22)00694-5</mixed-citation></ref><ref id="B13"><label>13.</label><mixed-citation>Rastogi P., O’Shaughnessy J., Martin M. et al. Adjuvant abemaciclib plus endocrine therapy for hormone receptor-positive, human epidermal growth factor receptor 2-negative, high-risk early breast cancer: results from a preplanned monarchE overall survival interim analysis, including 5-year efficacy outcomes. J Clin Oncol 2024;42(9):987–93. DOI: 10.1200/JCO.23.01994</mixed-citation></ref><ref id="B14"><label>14.</label><mixed-citation>Herbig U., Ferreira M., Condel L. et al. Cellular senescence in aging primates. Science 2006;311(5765):1257. DOI: 10.1126/science.1122446</mixed-citation></ref><ref id="B15"><label>15.</label><mixed-citation>Slamon D. Rationale and trial design of NATALEE: a phase III trial of adjuvant ribociclib + endocrine therapy versus endocrine therapy alone in patients with HR+/HER2– early breast cancer. Ther Adv Med Oncol 2023;15:1–16. DOI: 10.1177/17588359231178125</mixed-citation></ref><ref id="B16"><label>16.</label><mixed-citation>Zhang J., Bu X., Wang H. et al. Cyclin D-CDK4 kinase destabilizes PD-L1 via cullin 3-SPOP to control cancer immune surveillance. Nature 2018;553:91–5. DOI: 10.1038/NATURE25015</mixed-citation></ref><ref id="B17"><label>17.</label><mixed-citation>Laphanuwat P., Jirawatnotai S. Immunomodulatory roles of cell cycle regulators. Front Cell Dev Biol 2019;7:23. DOI: 10.3389/fcell.2019.00023</mixed-citation></ref><ref id="B18"><label>18.</label><mixed-citation>Johnston S., Harbeck N., Hegg R. et al. Abemaciclib combined with endocrine therapy for the adjuvant treatment of HR+, HER2–, node-positive, high-risk, early breast cancer (monarchE). J Clin Oncol 2020;38(34):3987–98. DOI: 10.1200/JCO.20.02514</mixed-citation></ref><ref id="B19"><label>19.</label><mixed-citation>Johnston S., Martin M., O’Shaughnessy J. et al. Overall survival with abemaciclib in early breast cancer. Ann Oncol 2025:S0923-7534(25)04948-8. DOI: 10.1016/j.annonc.2025.10.005</mixed-citation></ref></ref-list></back></article>
