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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">Pediatric Hematology/Oncology and Immunopathology</journal-id><journal-title-group><journal-title xml:lang="en">Pediatric Hematology/Oncology and Immunopathology</journal-title><trans-title-group xml:lang="ru"><trans-title>Вопросы гематологии/онкологии и иммунопатологии в педиатрии</trans-title></trans-title-group></journal-title-group><issn publication-format="print">1726-1708</issn><issn publication-format="electronic">2414-9314</issn><publisher><publisher-name xml:lang="en">Fund Doctors, Innovations, Science for Children</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">841</article-id><article-id pub-id-type="doi">10.24287/1726-1708-2024-23-1-14-24</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>ORIGINAL ARTICLES</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>ОРИГИНАЛЬНЫЕ СТАТЬИ</subject></subj-group><subj-group subj-group-type="article-type"><subject></subject></subj-group></article-categories><title-group><article-title xml:lang="en">Bispecific monoclonal antibody blinatumomab in the first-line therapy of B-lineage acute lymphoblastic leukemia in children and adolescents: interim results of the Russian Ministry of Health approbation protocol</article-title><trans-title-group xml:lang="ru"><trans-title>Биспецифическое моноклональное антитело блинатумомаб в первой линии терапии В-линейной острой лимфобластной лейкемии у детей и подростков: промежуточные результаты апробационного протокола Министерства здравоохранения Российской Федерации</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-9300-198X</contrib-id><name-alternatives><name xml:lang="en"><surname>Karachunskiy</surname><given-names>A. I.</given-names></name><name xml:lang="ru"><surname>Карачунский</surname><given-names>А. И.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Alexander I. Karachunskiy, Dr. Med. Sci., Professor, Deputy Director General, Director</p><p>Institute of Oncology, Radiology and Nuclear Medicine</p><p>117997; 1 Samory Mashela St.; Moscow</p></bio><bio xml:lang="ru"><p>Александр Исаакович Карачунский, д-р мед. наук, профессор, заместитель генерального директора –директор</p><p>Институт онкологии, радиологии и ядерной медицины</p><p>117997; ул. Саморы Машела, 1; Москва</p></bio><email>aikarat@mail.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/0000-0001-9670-3728</contrib-id><name-alternatives><name xml:lang="en"><surname>Rumyantseva</surname><given-names>Yu. V.</given-names></name><name xml:lang="ru"><surname>Румянцева</surname><given-names>Ю. В.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Moscow</p></bio><bio xml:lang="ru"><p>Москва</p></bio><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/0000-0002-1105-8676</contrib-id><name-alternatives><name xml:lang="en"><surname>Zharikova</surname><given-names>L. I.</given-names></name><name xml:lang="ru"><surname>Жарикова</surname><given-names>Л. И.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Moscow</p></bio><bio xml:lang="ru"><p>Москва</p></bio><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/0000-0003-3232-2322</contrib-id><name-alternatives><name xml:lang="en"><surname>Bydanov</surname><given-names>O. I.</given-names></name><name xml:lang="ru"><surname>Быданов</surname><given-names>О. И.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Moscow</p></bio><bio xml:lang="ru"><p>Москва</p></bio><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-3793-104X</contrib-id><name-alternatives><name xml:lang="en"><surname>Lagoyko</surname><given-names>S. N.</given-names></name><name xml:lang="ru"><surname>Лагойко</surname><given-names>С. Н.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Moscow</p></bio><bio xml:lang="ru"><p>Москва</p></bio><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-0889-6986</contrib-id><name-alternatives><name xml:lang="en"><surname>Popov</surname><given-names>A. M.</given-names></name><name xml:lang="ru"><surname>Попов</surname><given-names>А. М.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Moscow</p></bio><bio xml:lang="ru"><p>Москва</p></bio><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-3450-0498</contrib-id><name-alternatives><name xml:lang="en"><surname>Mikhailova</surname><given-names>E. V.</given-names></name><name xml:lang="ru"><surname>Михайлова</surname><given-names>Е. В.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Moscow</p></bio><bio xml:lang="ru"><p>Москва</p></bio><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-2352-7716</contrib-id><name-alternatives><name xml:lang="en"><surname>Olshanskaya</surname><given-names>Yu. V.</given-names></name><name xml:lang="ru"><surname>Ольшанская</surname><given-names>Ю. В.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Moscow</p></bio><bio xml:lang="ru"><p>Москва</p></bio><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Zerkalenkova</surname><given-names>E. A.</given-names></name><name xml:lang="ru"><surname>Зеркаленкова</surname><given-names>Е. А.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Moscow</p></bio><bio xml:lang="ru"><p>Москва</p></bio><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-4779-1896</contrib-id><name-alternatives><name xml:lang="en"><surname>Myakova</surname><given-names>N. V.</given-names></name><name xml:lang="ru"><surname>Мякова</surname><given-names>Н. В.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Moscow</p></bio><bio xml:lang="ru"><p>Москва</p></bio><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-7461-0050</contrib-id><name-alternatives><name xml:lang="en"><surname>Litvinov</surname><given-names>D. V.</given-names></name><name xml:lang="ru"><surname>Литвинов</surname><given-names>Д. В.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Moscow</p></bio><bio xml:lang="ru"><p>Москва</p></bio><xref ref-type="aff" rid="aff1"/><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Abu-Dzhabal</surname><given-names>M. I.</given-names></name><name xml:lang="ru"><surname>Абу-Джабал</surname><given-names>М. И.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Moscow</p></bio><bio xml:lang="ru"><p>Москва</p></bio><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-7265-0414</contrib-id><name-alternatives><name xml:lang="en"><surname>Khachatryan</surname><given-names>L. A.</given-names></name><name xml:lang="ru"><surname>Хачатрян</surname><given-names>Л. А.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Moscow</p></bio><bio xml:lang="ru"><p>Москва</p></bio><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Pshonkin</surname><given-names>A. V.</given-names></name><name xml:lang="ru"><surname>Пшонкин</surname><given-names>А. В.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Moscow</p></bio><bio xml:lang="ru"><p>Москва</p></bio><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Ponomareva</surname><given-names>N. I.</given-names></name><name xml:lang="ru"><surname>Пономарева</surname><given-names>Н. И.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Moscow</p></bio><bio xml:lang="ru"><p>Москва</p></bio><xref ref-type="aff" rid="aff3"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-2003-0982</contrib-id><name-alternatives><name xml:lang="en"><surname>Dinikina</surname><given-names>Yu. V.</given-names></name><name xml:lang="ru"><surname>Диникина</surname><given-names>Ю. В.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Saint Petersburg</p></bio><bio xml:lang="ru"><p>Санкт-Петербург</p></bio><xref ref-type="aff" rid="aff4"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Valiev</surname><given-names>T. T.</given-names></name><name xml:lang="ru"><surname>Валиев</surname><given-names>Т. Т.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Moscow</p></bio><bio xml:lang="ru"><p>Москва</p></bio><xref ref-type="aff" rid="aff5"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Varfolomeeva</surname><given-names>S. R.</given-names></name><name xml:lang="ru"><surname>Варфоломеева</surname><given-names>С. Р.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Moscow</p></bio><bio xml:lang="ru"><p>Москва</p></bio><xref ref-type="aff" rid="aff6"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-2322-5734</contrib-id><name-alternatives><name xml:lang="en"><surname>Novichkova</surname><given-names>G. A.</given-names></name><name xml:lang="ru"><surname>Новичкова</surname><given-names>Г. А.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Moscow</p></bio><bio xml:lang="ru"><p>Москва</p></bio><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">The Dmitry Rogachev National Medical Research Center of Pediatric Hematology, Oncology and Immunology of Ministry of Healthсare of the Russian Federation</institution></aff><aff><institution xml:lang="ru">ФГБУ «Национальный медицинский исследовательский центр детской гематологии, онкологии и иммунологии им. Дмитрия Рогачева» Минздрава России</institution></aff></aff-alternatives><aff-alternatives id="aff2"><aff><institution xml:lang="en">The N.I. Pirogov Russian National Research Medical University of Ministry of Healthcare of the Russian Federation</institution></aff><aff><institution xml:lang="ru">ФГАОУ ВО «Российский национальный исследовательский медицинский университет им. Н.И. Пирогова» Минздрава России</institution></aff></aff-alternatives><aff-alternatives id="aff3"><aff><institution xml:lang="en">Russian Children's Clinical Hospital ‒ branch of the N.I. Pirogov Russian National Research Medical University of Ministry of Healthcare of the Russian Federation</institution></aff><aff><institution xml:lang="ru">Российская детская клиническая больница ‒ филиал ФГАОУ ВО «Российский национальный исследовательский медицинский университет им. Н.И. Пирогова» Минздрава России</institution></aff></aff-alternatives><aff-alternatives id="aff4"><aff><institution xml:lang="en">The V.A. Almazov National Medical Research Centre of Ministry of Healthcare of the Russian Federation</institution></aff><aff><institution xml:lang="ru">ФГБУ «Национальный медицинский исследовательский центр им. В.А. Алмазова» Минздрава России</institution></aff></aff-alternatives><aff-alternatives id="aff5"><aff><institution xml:lang="en">The L.A. Durnov Research Institute of Pediatric Oncology and Hematology, the N.N. Blokhin National Medical Research Center of Oncology of Ministry of Healthcare of the Russian Federation</institution></aff><aff><institution xml:lang="ru">Научно-исследовательский институт детской онкологии и гематологии им. акад. РАМН Л.А. Дурнова ФГБУ «Национальный медицинский исследовательский центр онкологии им. Н.Н. Блохина» Минздрава России</institution></aff></aff-alternatives><aff-alternatives id="aff6"><aff><institution xml:lang="en">The L.A. Durnov Research Institute of Pediatric Oncology and Hematology, the N.N. Blokhin National Medical Research Center of Oncology of Ministry of Healthcare of the Russian Federation</institution></aff><aff><institution xml:lang="ru">5Научно-исследовательский институт детской онкологии и гематологии им. акад. РАМН Л.А. Дурнова ФГБУ «Национальный медицинский исследовательский центр онкологии им. Н.Н. Блохина» Минздрава России</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2024-04-19" publication-format="electronic"><day>19</day><month>04</month><year>2024</year></pub-date><volume>23</volume><issue>1</issue><issue-title xml:lang="en"/><issue-title xml:lang="ru"/><fpage>14</fpage><lpage>24</lpage><history><date date-type="received" iso-8601-date="2024-04-14"><day>14</day><month>04</month><year>2024</year></date><date date-type="accepted" iso-8601-date="2024-04-14"><day>14</day><month>04</month><year>2024</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2024, «D. Rogachev NMRCPHOI»</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2024, ФГБУ «НМИЦ ДГОИ им. Дмитрия Рогачева» Минздрава России</copyright-statement><copyright-year>2024</copyright-year><copyright-holder xml:lang="en">«D. Rogachev NMRCPHOI»</copyright-holder><copyright-holder xml:lang="ru">ФГБУ «НМИЦ ДГОИ им. Дмитрия Рогачева» Минздрава России</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://hemoncim.com/jour/article/view/841">https://hemoncim.com/jour/article/view/841</self-uri><abstract xml:lang="en"><p>   The bispecific monoclonal antibody blinatumomab (CD19/CD3) is widely and successfully used to treat children with relapsed/refractory B-cell precursor acute lymphoblastic leukemia (BCP-ALL). Advances have also led to the use of immunotherapy in children with primary BCP-ALL. This paper presents the effectiveness of a single blinatumomab course instead of consolidation chemotherapy and with short maintenance therapy in primary BCP-ALL patients. The study was approved by the Independent Ethics Committee and the Scientific Council of the Dmitry Rogachev National Medical Research Center of Pediatric Hematology, Oncology and Immunology. Between February 2020 and November 2022, 165 children with non-high-risk BCP-ALL (according to clinical stratification criteria defined in the study) were enrolled in the ALL-MB 2019 pilot study (NCT04723342). Patients received conventional risk-adapted induction therapy according to the ALL-MB 2015 protocol. Those who achieved complete morphological remission at the end of induction received 15 µg/m<sup>2</sup>/day of blinatumomab immediately after induction for 4 weeks, followed by 12 months of maintenance therapy. Minimal residual disease (MRD) was measured using multicolor flow cytometryat the end of induction, then immediately after blinatumomab course, and then four times during maintenance therapy at threemonth intervals. All 165 patients successfully completed induction therapy and achieved complete hematological remission. All had their MRD measured at the end of induction. One hundred thirty-six (82.2%) patients were MRD-negative, and the remaining 29 patients showed various levels of MRD positivity. MRD was assessed in all 164 patients who completed the blinatumomab course. One patient had blinatumomab discontinued due to acute neurotoxicity and was subsequently treated according to the intermediate-risk ALL-MB 2015 protocol. All but one patient achieved MRD negativity after blinatumomab course, regardless of MRD value at the end of induction. One adolescent girl with a high MRD level after induction remained MRD positive after blinatumomab course and further received high-risk therapy with allogeneic hematopoietic stem cell transplantation. At the time of analysis, 162 children had completed all therapy, including 12 months of maintenance. MRD was examined in 151 of them, and all were MRD negative. Over a 4-year study period with a median follow-up of 2.5 years, 10 relapses were registered: 4 in the standard-risk group and 6 in the intermediate-risk group. The 4-year event-free survival was 89.1 ± 3.7 % for all patients, 92.0 ± 4.2 % and 82.8 ± 8.1 % for the standard and intermediate risk groups, respectively. At the time of analysis, all patients were alive; no deaths were registered. Although the presented results are preliminary and more time is needed for definitive conclusions, a 4-week 15 µg/m<sup>2</sup>/day blinatumomab course immediately after induction followed by 12 months of maintenance therapy is effective in achieving and maintaining MRD negativity in children with non-high risk BCP-ALL. This study showed the fundamental possibility of treating ALL by combining immunotherapy with the bispecific monoclonal antibody blinatumomab with a significant chemotherapy reduction.</p></abstract><trans-abstract xml:lang="ru"><p>   Биспецифическое моноклональное антитело блинатумомаб (CD19/CD3) широко и успешно используется для лечения детей с рецидивирующей или рефрактерной В-линейной острой лимфобластной лейкемией (ВП-ОЛЛ). Достигнутые успехи также привели к использованию иммунотерапии у детей с первичной ВП-ОЛЛ. В данной работе представлена эффективность одного курса блинатумомаба вместо консолидирующей химиотерапии и с редукцией длительности поддерживающей терапии у пациентов с первично диагностированной ВП-ОЛЛ. Настоящее исследование одобрено независимым этическим комитетом и утверждено решением ученого совета НМИЦ ДГОИ им. Дмитрия Рогачева. В период с февраля 2020 г. по ноябрь 2022 г. 165 детей с ВП-ОЛЛ стандартного и промежуточного риска (в соответствии с критериями клинической стратификации, определенными в исследовании) были включены в пилотное исследование ALL-MB 2019 (NCT04723342). Пациенты получали обычную риск-адаптированную индукционную терапию в соответствии с протоколом ALL-MB 2015. Больные, достигшие полной морфологической ремиссии в конце индукционной терапии, получали блинатумомаб в дозе 15 мкг/м<sup>2</sup>/сут сразу после индукции в течение 4 нед с последующей стандартной поддерживающей терапией в течение 12 мес. Минимальную остаточную болезнь (МОБ) измеряли с использованием многоцветной проточной цитометрии в конце индукции, затем сразу после лечения блинатумомабом и 4 раза во время поддерживающей терапии с 3-месячными интервалами. Все 165 пациентов успешно завершили индукционную терапию и достигли полной гематологической ремиссии. У всех в конце индукции была измерена МОБ. МОБ-негативными были 136 (82,2 %) пациентов, а у остальных 29 больных выявлялась МОБ различного уровня позитивности. После завершения курса блинатумомаба МОБ была исследована у 164 больных. У 1 пациента курс блинатумомаба был прерван из-за острой нейротоксичности, и в дальнейшем он получал лечение в соответствии с терапевтическим планом для группы промежуточного риска протокола ALL-MB 2015. Все кроме 1 пациента достигли МОБ-негативности после курса блинатумомаба независимо от величины МОБ в конце индукции. Одна девочка-подросток с исходно высокой МОБ в конце индукции оставалась МОБ-позитивной и далее получала терапию согласно плану для группы высокого риска с аллогенной трансплантацией гемопоэтических стволовых клеток. На момент анализа 162 пациента завершили всю терапию, включая 12 мес поддерживающей терапии. МОБ на момент окончания терапии исследовали у 151/162 пациента, все были МОБ-негативны. За 4 года исследования с медианой наблюдения 2,5 года было зарегистрировано 10 рецидивов: 4 в группе стандартного риска и 6 в группе промежуточного риска. Четырехлетняя бессобытийная выживаемость составила 89,1 ± 3,7 % для всех больных, 92,0 ± 4,2 % и 82,8 ± 8,1 % для групп стандартного и промежуточного риска соответственно. На момент анализа все пациенты живы, ни одного случая летальности зафиксировано не было. Хотя представленные результаты являются предварительными и требуется больше времени для окончательных выводов, тем не менее лечение блинатумомабом в дозе 15 мкг/м<sup>2</sup>/сут в течение 4 нед сразу после индукции с последующей 12-месячной поддерживающей терапией эффективно для достижения и поддержания МОБ негативности у детей с ВП-ОЛЛ стандартного и промежуточного риска. Кроме того, данное исследование показало принципиальную возможность редукции химиотерапии у детей с ОЛЛ путем комбинации с иммунотерапией биспецифическим моноклональным антителом блинатумомаб.</p></trans-abstract><kwd-group xml:lang="en"><kwd>acute lymphoblastic leukemia</kwd><kwd>children</kwd><kwd>blinatumomab</kwd><kwd>minimal residual disease</kwd><kwd>reduced-intensity treatment</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>острый лимфобластный лейкоз</kwd><kwd>дети</kwd><kwd>блинатумомаб</kwd><kwd>минимальная остаточная болезнь</kwd><kwd>лечение сниженной интенсивности</kwd></kwd-group><funding-group><funding-statement xml:lang="en">Not specified</funding-statement><funding-statement xml:lang="ru">Не указан</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">Rumyantseva Yu.V, Karachunskiy A.I The optimization of treatment for acute lymphoblastic leukemia in children in Russia and Belarus: Moscow–Berlin strategy. 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