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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">MD-Onco</journal-id><journal-title-group><journal-title xml:lang="en">MD-Onco</journal-title><trans-title-group xml:lang="ru"><trans-title>MD-Onco</trans-title></trans-title-group></journal-title-group><issn publication-format="print">2782-3202</issn><issn publication-format="electronic">2782-6171</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">213</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>Articles</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>Статьи</subject></subj-group><subj-group subj-group-type="article-type"><subject></subject></subj-group></article-categories><title-group><article-title xml:lang="en">Evaluation of Avatrombopag Efficacy in Chemotherapy-Induced Thrombocytopenia</article-title><trans-title-group xml:lang="ru"><trans-title>Оценка эффективности аватромбопага при химиотерапией-индуцированной тромбоцитопении (CAT)</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0009-0007-0829-871X</contrib-id><name-alternatives><name xml:lang="en"><surname>Podenok</surname><given-names>A.</given-names></name><name xml:lang="ru"><surname>Поденок</surname><given-names>Алексей Владимирович</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>matchamomilla@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/0009-0007-9269-7405</contrib-id><name-alternatives><name xml:lang="en"><surname>Manaenkov</surname><given-names>D. A.</given-names></name><name xml:lang="ru"><surname>Манаенков</surname><given-names>Д. А.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Daniil Arturovich Manaenkov</p> <p>4 Koroleva St., Obninsk, 249031</p></bio><bio xml:lang="ru"><p>Даниил Артурович Манаенков</p> <p>249036, Обнинск, ул. Королева, 4</p></bio><email>manaenkov.00@inbox.ru</email><xref ref-type="aff" rid="aff3"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0009-0007-9269-7405</contrib-id><name-alternatives><name xml:lang="en"><surname>Manaenkov</surname><given-names>D. A.</given-names></name><name xml:lang="ru"><surname>Манаенков</surname><given-names>Д. А.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Daniil Arturovich Manaenkov</p> <p>4 Koroleva St., Obninsk, 249031</p></bio><bio xml:lang="ru"><p>Даниил Артурович Манаенков</p> <p>249036, Обнинск, ул. Королева, 4</p></bio><email>manaenkov.00@inbox.ru</email><xref ref-type="aff" rid="aff3"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-0023-4216</contrib-id><name-alternatives><name xml:lang="en"><surname>Falaleevа</surname><given-names>N. A.</given-names></name><name xml:lang="ru"><surname>Фалалеева</surname><given-names>Н. А.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>4 Koroleva St., Obninsk, 249031</p> <p>1 Studgorodok Territory, Obninsk, 249039</p></bio><bio xml:lang="ru"><p>249036, Обнинск, ул. Королева, 4</p> <p>249039, Обнинск, тер. Студгородок, 1</p></bio><email>falaleeva-n@mail.ru</email><xref ref-type="aff" rid="aff3"/><xref ref-type="aff" rid="aff4"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-0023-4216</contrib-id><name-alternatives><name xml:lang="en"><surname>Falaleevа</surname><given-names>N. A.</given-names></name><name xml:lang="ru"><surname>Фалалеева</surname><given-names>Н. А.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>4 Koroleva St., Obninsk, 249031</p> <p>1 Studgorodok Territory, Obninsk, 249039</p></bio><bio xml:lang="ru"><p>249036, Обнинск, ул. Королева, 4</p> <p>249039, Обнинск, тер. Студгородок, 1</p></bio><email>falaleeva-n@mail.ru</email><xref ref-type="aff" rid="aff3"/><xref ref-type="aff" rid="aff4"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-3536-0770</contrib-id><name-alternatives><name xml:lang="en"><surname>Shuvaev</surname><given-names>V. A.</given-names></name><name xml:lang="ru"><surname>Шуваев</surname><given-names>В. А.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>4 Koroleva St., Obninsk, 249031</p> <p>1 Studgorodok Territory, Obninsk, 249039</p></bio><bio xml:lang="ru"><p>249036, Обнинск, ул. Королева, 4</p> <p>249039, Обнинск, тер. Студгородок, 1</p></bio><email>shuvaev77@mail.ru</email><xref ref-type="aff" rid="aff3"/><xref ref-type="aff" rid="aff4"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-3536-0770</contrib-id><name-alternatives><name xml:lang="en"><surname>Shuvaev</surname><given-names>V. A.</given-names></name><name xml:lang="ru"><surname>Шуваев</surname><given-names>В. А.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>4 Koroleva St., Obninsk, 249031</p> <p>1 Studgorodok Territory, Obninsk, 249039</p></bio><bio xml:lang="ru"><p>249036, Обнинск, ул. Королева, 4</p> <p>249039, Обнинск, тер. Студгородок, 1</p></bio><email>shuvaev77@mail.ru</email><xref ref-type="aff" rid="aff3"/><xref ref-type="aff" rid="aff4"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0009-0009-6911-3322</contrib-id><name-alternatives><name xml:lang="en"><surname>Vovchenko</surname><given-names>A. A.</given-names></name><name xml:lang="ru"><surname>Вовченко</surname><given-names>А. А.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Artem Andreevich Vovchenko</p> <p>4 Koroleva St., Obninsk, 249031</p> <p>1 Studgorodok Territory, Obninsk, 249039</p></bio><bio xml:lang="ru"><p>Артем Андреевич Вовченко</p> <p>249036, Обнинск, ул. Королева, 4</p> <p>249039, Обнинск, тер. Студгородок, 1</p></bio><email>dr.vovchenkoartem@gmail.com</email><xref ref-type="aff" rid="aff3"/><xref ref-type="aff" rid="aff4"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0009-0009-6911-3322</contrib-id><name-alternatives><name xml:lang="en"><surname>Vovchenko</surname><given-names>A. A.</given-names></name><name xml:lang="ru"><surname>Вовченко</surname><given-names>А. А.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Artem Andreevich Vovchenko</p> <p>4 Koroleva St., Obninsk, 249031</p> <p>1 Studgorodok Territory, Obninsk, 249039</p></bio><bio xml:lang="ru"><p>Артем Андреевич Вовченко</p> <p>249036, Обнинск, ул. Королева, 4</p> <p>249039, Обнинск, тер. Студгородок, 1</p></bio><email>dr.vovchenkoartem@gmail.com</email><xref ref-type="aff" rid="aff3"/><xref ref-type="aff" rid="aff4"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">A.F. Tsyba Medical Radiological Research Center – Branch of the National Medical Research Center of Radiology, Ministry of Health of the Russian Federation</institution></aff><aff><institution xml:lang="ru">Медицинский радиологический научный центр им. А.Ф. Цыба - филиал ФГБУ "Национальный медицинский исследовательский центр радиологии" Министерства здравоохранения Российской Федерации</institution></aff></aff-alternatives><aff-alternatives id="aff2"><aff><institution xml:lang="en">4 Koroleva St., Obninsk, Kaluga Region, 249036, Russian Federation</institution></aff><aff><institution xml:lang="ru">249036, Калужская область, г. Обнинск, ул. Королева, д. 4</institution></aff></aff-alternatives><aff-alternatives id="aff3"><aff><institution xml:lang="en">A.F. Tsyba Medical Radiological Research Center – branch of the National Medical Research Radiological Center, Ministry of Health of Russia</institution></aff><aff><institution xml:lang="ru">Медицинский радиологический научный центр им. А.Ф. Цыба – филиал ФГБУ «Национальный медицинский исследовательский центр радиологии» Минздрава России</institution></aff></aff-alternatives><aff-alternatives id="aff4"><aff><institution xml:lang="en">Obninsk Institute of Atomic Energy – branch of the National Research Nuclear University “MEPhI”</institution></aff><aff><institution xml:lang="ru">Обнинский институт атомной энергетики – филиал ФГАОУ ВО «Национальный исследовательский ядерный университет «МИФИ»</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2026-04-08" publication-format="electronic"><day>08</day><month>04</month><year>2026</year></pub-date><volume>6</volume><issue>1</issue><issue-title xml:lang="en">MD-Onco</issue-title><issue-title xml:lang="ru"/><history><date date-type="received" iso-8601-date="2026-01-12"><day>12</day><month>01</month><year>2026</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2026, ABV-Press</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2026, АБВ-пресс</copyright-statement><copyright-year>2026</copyright-year><copyright-holder xml:lang="en">ABV-Press</copyright-holder><copyright-holder xml:lang="ru">АБВ-пресс</copyright-holder><license><ali:license_ref xmlns:ali="http://www.niso.org/schemas/ali/1.0/">https://mdonco.abvpress.ru/jour/about/editorialPolicies</ali:license_ref></license></permissions><self-uri xlink:href="https://mdonco.abvpress.ru/jour/article/view/213">https://mdonco.abvpress.ru/jour/article/view/213</self-uri><abstract xml:lang="en"><p><bold>Background.</bold> Chemotherapy-induced thrombocytopenia (CIT) is one of the most common and clinically significant complications of anticancer therapy. It limits the ability to maintain planned chemotherapy dose intensity, increases the risk of hemorrhagic complications, and leads to a higher demand for platelet transfusions. Given the limited efficacy and availability of transfusion support, the development of pharmacological approaches for CIT management is of high clinical relevance. Thrombopoietin receptor agonists, including avatrombopag, represent a promising strategy in supportive cancer care.</p> <p><bold>Objective.</bold> To evaluate the efficacy and clinical relevance of prophylactic avatrombopag use in patients with chemotherapy-induced thrombocytopenia.</p> <p><bold>Materials and Methods.</bold> This observational study included 9 patients (4 males and 5 females) with oncological diseases who developed thrombocytopenia (&lt;100×10⁹/L) after a previous chemotherapy cycle. The median age was 52 years (range 27–68). Avatrombopag was administered prophylactically after completion of chemotherapy at a dose of 40 mg/day (20 mg twice daily) for 5 or 10 days, depending on the severity of thrombocytopenia. The following parameters were analyzed: nadir platelet count during the inter-cycle period, incidence of hemorrhagic events, requirement for platelet transfusions, and duration of delay of the subsequent chemotherapy cycle.</p> <p><bold>Results.</bold> During avatrombopag administration, the median nadir platelet count remained unchanged at 10×10⁹/L; however, a marked increase up to 79×10⁹/L was observed in some patients. The incidence of hemorrhagic complications decreased from 55% to 11%. The median number of platelet transfusions was reduced from 3 to 2 units. A significant reduction in chemotherapy delays was observed, with the median delay decreasing from 11 days to 0 days. No avatrombopag-related adverse events were reported.</p> <p><bold>Conclusion.</bold> Prophylactic use of avatrombopag in patients with chemotherapy-induced thrombocytopenia was associated with a reduced incidence of bleeding complications, decreased need for platelet transfusions, and fewer delays in subsequent chemotherapy cycles. Despite the limited sample size, these findings support the clinical value of avatrombopag as a supportive therapy and warrant further prospective studies.</p></abstract><trans-abstract xml:lang="ru"><p><bold>Аннотация</bold></p> <p><bold>Введение.</bold> Тромбоцитопения, индуцированная химиотерапией (chemotherapy-induced thrombocytopenia, CIT), является одним из наиболее частых и клинически значимых осложнений противоопухолевого лечения. Она ограничивает возможность соблюдения запланированной дозовой интенсивности химиотерапии, повышает риск геморрагических осложнений и увеличивает потребность в трансфузиях тромбоцитарного концентрата. В связи с ограниченной эффективностью и доступностью трансфузионной терапии актуальным является поиск фармакологических методов коррекции CIT. Агонисты рецепторов тромбопоэтина, в частности аватромбопаг, представляют собой перспективное направление поддерживающей терапии.</p> <p><bold>Цель исследования</bold> — оценить эффективность и клиническую значимость профилактического применения аватромбопага у пациентов с химиотерапией-индуцированной тромбоцитопенией.</p> <p><bold>Материалы и методы.</bold> В наблюдательное исследование включены 9 пациентов (4 мужчины и 5 женщин) с онкологическими заболеваниями, у которых после предыдущего курса химиотерапии развилась тромбоцитопения менее 100×10⁹/л. Медиана возраста составила 52 (27–68) года. Аватромбопаг назначали профилактически после завершения курса химиотерапии в дозе 40 мг/сут (20 мг 2 раза в сутки) в течение 5 или 10 дней в зависимости от глубины тромбоцитопении. Оценивали минимальный уровень тромбоцитов в межкурсовом периоде, частоту геморрагического синдрома, потребность в трансфузиях тромбоцитарного концентрата и длительность отсрочки следующего курса химиотерапии.</p> <p><bold>Результаты.</bold> На фоне применения аватромбопага медиана минимального уровня тромбоцитов не изменилась и составила 10×10⁹/л, однако у части пациентов отмечался выраженный подъем уровня тромбоцитов до 79×10⁹/л. Частота геморрагического синдрома снизилась с 55% до 11%. Потребность в трансфузиях тромбоцитарного концентрата уменьшилась с медианы 3 до 2 доз. Существенно сократилось число отсрочек очередного курса химиотерапии: медиана длительности отсрочки снизилась с 11 до 0 дней. Нежелательных явлений, связанных с применением аватромбопага, зарегистрировано не было.</p> <p><bold>Заключение.</bold> Профилактическое применение аватромбопага у пациентов с химиотерапией-индуцированной тромбоцитопенией способствует снижению частоты геморрагических осложнений, уменьшению потребности в трансфузиях тромбоцитов и сокращению отсрочек проведения очередных курсов химиотерапии. Несмотря на ограниченный размер выборки, полученные данные подтверждают клиническую значимость аватромбопага как средства поддерживающей терапии и обосновывают необходимость дальнейших проспективных исследований.</p> <p> </p></trans-abstract><kwd-group xml:lang="en"><kwd>chemotherapy-induced thrombocytopenia, CIT, avatrombopag, thrombopoietin receptor agonists, platelets, supportive care, oncology.</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>химиотерапией-индуцированная тромбоцитопения, CIT, аватромбопаг, агонисты рецепторов тромбопоэтина, тромбоциты, поддерживающая терапия, онкология.</kwd></kwd-group><funding-group/></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Clinical challenges and promising therapies for chemotherapy-induced thrombocytopenia / H. Al‐Samkari, G.A. And Soff // Expert Review of Hematology. – 2021. – Vol. 14, №5. – P. 437-448. 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