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<article article-type="research-article" dtd-version="1.3" 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" xml:lang="ru"><front><journal-meta><journal-id journal-id-type="publisher-id">nodgo</journal-id><journal-title-group><journal-title xml:lang="ru">Российский журнал детской гематологии и онкологии (РЖДГиО)</journal-title><trans-title-group xml:lang="en"><trans-title>Russian Journal of Pediatric Hematology and Oncology</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2311-1267</issn><issn pub-type="epub">2413-5496</issn><publisher><publisher-name>LTD “Graphica”</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.21682/2311-1267-2020-7-2-15-22</article-id><article-id custom-type="elpub" pub-id-type="custom">nodgo-600</article-id><article-categories><subj-group subj-group-type="heading"><subject>Research Article</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="ru"><subject>ОРИГИНАЛЬНЫЕ ИССЛЕДОВАНИЯ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>ORIGINAL STUDIES</subject></subj-group></article-categories><title-group><article-title>Перспективы оценки минимальной остаточной болезни в постиндукционном периоде при В-линейном остром лимфобластном лейкозе у детей</article-title><trans-title-group xml:lang="en"><trans-title>Prospects for evaluation of the minimal residual disease in the post-induction period in pediatric B-precursor acute lymphoblastic leukemia</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-8350-4153</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Шервашидзе</surname><given-names>М. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Shervashidze</surname><given-names>M. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Мери Алексеевна Шервашидзе, научный сотрудник детского отделения химиотерапии гемобластозов отдела гематологии и трансплантации костного мозга НМИЦ</p><p> Россия, 115478, Москва, Каширское шоссе, 23</p></bio><bio xml:lang="en"><p>M.A. Shervashidze, Researcher, Children’s Department of Hemoblastosis Chemotherapy, Department of Hematology and Bone Marrow Transplantation</p><p>23 Kashirskoe Shosse, Moscow, 115478, Russia</p></bio><email xlink:type="simple">shervashidze85@gmail.com</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-1469-2365</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Валиев</surname><given-names>Т. Т.</given-names></name><name name-style="western" xml:lang="en"><surname>Valiev</surname><given-names>T. T.</given-names></name></name-alternatives><bio xml:lang="ru"><p>д.м.н., заведующий детским отделением химиотерапии гемобластозов отдела гематологии и трансплантации костного мозга</p><p>Россия, 115478, Москва, Каширское шоссе, 23</p></bio><bio xml:lang="en"><p>Dr. of Sci. (Med.), Head of the Children’s Department of Hemoblastosis Chemotherapy of the Department of Hematology and Bone Marrow Transplantation</p><p>23 Kashirskoe Shosse, Moscow, 115478, Russia</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-3966-128X</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Тупицын</surname><given-names>Н. Н.</given-names></name><name name-style="western" xml:lang="en"><surname>Tupitsyn</surname><given-names>N. N.</given-names></name></name-alternatives><bio xml:lang="ru"><p>д.м.н., профессор, заведующий лабораторией иммунологии гемопоэза НИИ клинической онкологии им. Н.Н. Трапезникова</p><p>Россия, 115478, Москва, Каширское шоссе, 23</p></bio><bio xml:lang="en"><p>Dr. of Sci. (Med.), Professor, Head of the Laboratory of Hematopoiesis Immunology, N.N. Trapeznikov Clinical Oncology Research Institute</p><p>23 Kashirskoe Shosse, Moscow, 115478, Russia</p></bio><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>ФГБУ «Национальный медицинский исследовательский центр онкологии имени Н.Н. Блохина» Минздрава России</institution><country>Россия</country></aff><aff xml:lang="en"><institution>N.N. Blokhin National Medical Research Centre of Oncology, Ministry of Health of Russia</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2020</year></pub-date><pub-date pub-type="epub"><day>03</day><month>07</month><year>2020</year></pub-date><volume>7</volume><issue>2</issue><fpage>15</fpage><lpage>22</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Шервашидзе М.А., Валиев Т.Т., Тупицын Н.Н., 2020</copyright-statement><copyright-year>2020</copyright-year><copyright-holder xml:lang="ru">Шервашидзе М.А., Валиев Т.Т., Тупицын Н.Н.</copyright-holder><copyright-holder xml:lang="en">Shervashidze M.A., Valiev T.T., Tupitsyn N.N.</copyright-holder><license xml:lang="ru" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>Данная работа распространяется под лицензией Creative Commons Attribution 4.0.</license-p></license><license xml:lang="en" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>This work is licensed under a Creative Commons Attribution 4.0 License.</license-p></license></permissions><self-uri xlink:href="https://journal.nodgo.org/jour/article/view/600">https://journal.nodgo.org/jour/article/view/600</self-uri><abstract><sec><title>Актуальность</title><p>Актуальность. В настоящее время определение уровня минимальной остаточной болезни (МОБ) является стандартном в оценке эффективности терапии при остром лимфобластном лейкозе (ОЛЛ) у взрослых и детей. Но если целесообразность исследования МОБ на этапе индукции сомнений не вызывает, то прогностическое значение МОБ в постиндукционном периоде является пред- метом научных дискуссий. В ряде исследований было показано, что МОБ-позитивный статус после химиотерапии связан с плохим прогнозом, и повторное появление значимого уровня МОБ во время наблюдения позволяет рано идентифицировать возникающий рецидив и, следовательно, начать терапию при минимальном объеме опухолевой популяции клеток.</p><p>Цель исследования – определение прогностического влияния постиндукционного уровня МОБ на показатели общей (ОВ), безрецидивной (БРВ) и бессобытийной (БСВ) выживаемости у детей с В-линейным ОЛЛ, проходивших программное лечение в НИИ ДОиГ ФГБУ «НМИЦ онкологии им. Н.Н. Блохина» Минздрава России.</p></sec><sec><title>Материалы и методы</title><p>Материалы и методы. В исследование включены 73 пациента с впервые установленным диагнозом В-линейный ОЛЛ. Средний возраст больных составлял 5,2 года (от 1 до 16 лет). Программная полихимиотерапия проводилась по протоколу ALL IC-BFM 2009. Оценка МОБ методом проточной цитометрии производилась на 15-й и 33-й дни индукционного курса, а также на 78-й день (начало консолидации) терапии.</p></sec><sec><title>Результаты</title><p>Результаты. БСВ и БРВ оказались одинаковыми у больных при МОБ-позитивном статусе на 78-й день лечения – 76,8 × 12,3 %. В случаях МОБ-негативного статуса – 96,2 × 2,6 % (р = 0,06). Детальная оценка МОБ позволила определить в группе высокого риска когорту больных с МОБ-негативным статусом на 78-й день терапии со 100 % ОВ (время наблюдения – 6 лет).</p></sec><sec><title>Выводы</title><p>Выводы. Во всех группах риска пациенты с МOБ-негативным статусом характеризовались более высокими показателями выживаемости, что указывает на возможность проведения дополнительной стратификации по группам риска не только на этапе индукции, но и при проведении консолидирующего протокола терапии.</p></sec></abstract><trans-abstract xml:lang="en"><sec><title>Relevance</title><p>Relevance. Currently, the assessment of the level of minimal residual disease (MRD) is the standard in evaluating the effectiveness of therapy in acute lymphoblastic leukemia (ALL) in adults and children. Although, the necessity to study MRD at the induction therapy is not in doubt, the prognostic value of MRD in the period after induction is the subject for scientific discussion. Several studies suggest that MRD-positive status after induction chemotherapy associated with poor prognosis, and the reappearance of significant level MRD during follow-up allows impending relapse to be identified and to begin appropriate therapy in low leukemic cells level.</p><p>Aim – to determine the prognostic value of post-induction MRD on overall (OS), relapse-free (RFS), and event-free (EFS) survival in children with B-precursor ALL who received program treatment at the N.N. Blokhin National Medical Research Centre of Oncology, Ministry of Health of Russia.</p></sec><sec><title>Materials and methods</title><p>Materials and methods. The study included 73 pediatric patients with initial B-precursor ALL. The median age of the patients was 5.2 years (from 1 to 16 years). The treatment was according to the ALL IC-BFM 2009 protocol. MRD detected on day 15 and 33 of induction therapy, and day 78 of consolidation beginning. MRD level was determined by flow cytometry method.</p></sec><sec><title>Results</title><p>Results. EFS and RFS were the same for patients with MRD-positive status on 78 day of treatment 76.8 ± 12.3 % and 96.2 ± 2.6 % for MRDnegative (p = 0.06). Detailed assessment of MRD revealed a cohort of high-risk patients with MRD-negative status on 78 day of therapy with 100 % OS (observation time – 6 years).</p></sec><sec><title>Conclusion</title><p>Conclusion. In all risk groups, patients with negative MRD status showed a better survival result, which indicates the possibility of additional stratification by risk groups not only at the induction, but also during a consolidating treatment protocol.</p></sec></trans-abstract><kwd-group xml:lang="ru"><kwd>острый лимфобластный лейкоз</kwd><kwd>минимальная остаточная болезнь</kwd><kwd>дети</kwd><kwd>лечение</kwd><kwd>группы риска</kwd></kwd-group><kwd-group xml:lang="en"><kwd>acute lymphoblastic leukemia</kwd><kwd>minimal residual disease</kwd><kwd>children</kwd><kwd>treatment</kwd><kwd>risk group</kwd></kwd-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Maloney K.W., Devidas M., Wang C., Mattano L.A., Friedmann A.M., Buckley P., Borowitz M.J., Carroll A.J., Gastier-Foster J.M., Heerema N.A., Kadan-Lottick N., Loh M.L., Matloub Y.H., Marshall D.T., Stork L.C., Raetz E.A., Wood B., Hunger S.P., Carroll W.L., Winick N.J. 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