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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">Oncohematology</journal-id><journal-title-group><journal-title xml:lang="en">Oncohematology</journal-title><trans-title-group xml:lang="ru"><trans-title>Онкогематология</trans-title></trans-title-group></journal-title-group><issn publication-format="print">1818-8346</issn><issn publication-format="electronic">2413-4023</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">587</article-id><article-id pub-id-type="doi">10.17650/1818-8346-2022-17-4-38-47</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>HEMATOLOGIC MALIGNANCIES: TREATMENT</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>ЛЕЧЕНИЕ ГЕМОБЛАСТОЗОВ</subject></subj-group><subj-group subj-group-type="article-type"><subject></subject></subj-group></article-categories><title-group><article-title xml:lang="en">A clinical case of the effective combined use of BCL-2 and PI3K inhibitors in the treatment of a patient with an unfavorable chronic lymphocytic leukemia with transformation into diffuse large B-cell lymphoma (Richter’s syndrome)</article-title><trans-title-group xml:lang="ru"><trans-title>Клиническое наблюдение эффективности совместного применения ингибиторов BCL-2 и PI3K в лечении пациента с прогностически неблагоприятным хроническим лимфолейкозом с трансформацией в диффузную В-крупноклеточную лимфому (синдром Рихтера)</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-1309-7265</contrib-id><name-alternatives><name xml:lang="en"><surname>Rukavitsyn</surname><given-names>O. A.</given-names></name><name xml:lang="ru"><surname>Рукавицын</surname><given-names>О. А.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Gospital’naya Ploshchad’, Moscow 105229</p></bio><bio xml:lang="ru"><p>105229 Москва, Госпитальная пл., 3</p></bio><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Pop</surname><given-names>V. P.</given-names></name><name xml:lang="ru"><surname>Поп</surname><given-names>В. П.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Gospital’naya Ploshchad’, Moscow 105229</p></bio><bio xml:lang="ru"><p>105229 Москва, Госпитальная пл., 3</p></bio><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Drozd</surname><given-names>M. V.</given-names></name><name xml:lang="ru"><surname>Дрозд</surname><given-names>М. В.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Gospital’naya Ploshchad’, Moscow 105229</p></bio><bio xml:lang="ru"><p>105229 Москва, Госпитальная пл., 3</p></bio><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-8443-8816</contrib-id><name-alternatives><name xml:lang="en"><surname>Ryabukhina</surname><given-names>Yu. E.</given-names></name><name xml:lang="ru"><surname>Рябухина</surname><given-names>Ю. Е.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>111 1st Uspenskoe Shosse, Lapino, Moscow region 143081</p></bio><bio xml:lang="ru"><p>143081 Московская обл., д. Лапино, 1-е Успенское шоссе, 111</p></bio><xref ref-type="aff" rid="aff2"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Main Military Clinical Hospital named after N.N. Burdenko, Ministry of Defense of Russia</institution></aff><aff><institution xml:lang="ru">ФГБУ «Главный военный клинический госпиталь им. акад. Н.Н. Бурденко» Минобороны России</institution></aff></aff-alternatives><aff-alternatives id="aff2"><aff><institution xml:lang="en">Clinical Hospital “Lapino” of the “Mother and Child” Group of companies</institution></aff><aff><institution xml:lang="ru">Клинический госпиталь «Лапино» группы компаний «Мать и дитя»</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2022-11-07" publication-format="electronic"><day>07</day><month>11</month><year>2022</year></pub-date><volume>17</volume><issue>4</issue><issue-title xml:lang="en"/><issue-title xml:lang="ru"/><fpage>38</fpage><lpage>47</lpage><history><date date-type="received" iso-8601-date="2022-11-06"><day>06</day><month>11</month><year>2022</year></date><date date-type="accepted" iso-8601-date="2022-11-06"><day>06</day><month>11</month><year>2022</year></date></history><permissions><ali:free_to_read xmlns:ali="http://www.niso.org/schemas/ali/1.0/"/></permissions><self-uri xlink:href="https://oncohematology.abvpress.ru/ongm/article/view/587">https://oncohematology.abvpress.ru/ongm/article/view/587</self-uri><abstract xml:lang="en"><p>Understanding the molecular biological basis of chronic lymphocytic leukemia (CLL) pathogenesis and stratification of patients into risk groups has now led to significant advances in treatment. New targeted drugs with different mechanisms of action (bruton’s tyrosine kinase inhibitors, bCL-2 inhibitors, pI3K inhibitors) have significantly improved the prognosis of high-risk CLL patients. In some CLL cases the nodular tumor component can change to a more aggressive subtype of lymphoma (often diffuse large b-cell) with preservation of the small-cell leukemic component with the CLL phenotype (Richter’s syndrome), usually characterized by rapid progression and poor prognosis. The issue of treatment efficacy in patients with Richter’s syndrome still remains unresolved. The results of new drugs clinical trials are often contradictory and cannot yet be recommended for routine use in clinical practice. The low incidence of Richter’s syndrome, the lack of a unified view of the pathogenesis and therapy approaches make the search for effective drugs an urgent task, so each clinical observation is of undoubted interest.A clinical case of CLL patient with unfavorable molecular cytogenetic risk and transformation into diffuse large b-cell lymphoma (Richter’s syndrome) is presented. The combined use of bCL-2 inhibitors (venetoclax) and pI3K (duvelisib) led to the achievement of partial remission followed by a gradual increase in the positive antitumor effect.</p></abstract><trans-abstract xml:lang="ru"><p>Благодаря пониманию молекулярно-биологических основ патогенеза хронического лимфолейкоза (хлл) и распределению больных в группы риска к настоящему времени достигнуты значительные успехи в лечении, а появление новых таргетных лекарственных препаратов с различным механизмом действия (ингибиторы тирозинкиназы Брутона, ингибиторы bCL-2, ингибиторы pI3K) позволило значительно улучшить прогноз пациентов с хлл высокого риска. В ряде случаев у больных хлл нодулярный компонент опухоли может измениться на более агрессивный подтип лимфомы (чаще диффузную В-крупноклеточную) с сохранением мелкоклеточного лейкемического компонента с фенотипом хлл (синдром Рихтера), отличающийся, как правило, быстрым прогрессированием и неблагоприятным прогнозом в целом. Вопрос эффективности терапии пациентов с синдромом Рихтера до сих пор остается нерешенным. Результаты клинических испытаний новых лекарственных агентов нередко противоречивы и пока не могут быть рекомендованы для рутинного использования в клинической практике. Небольшая частота встречаемости синдрома Рихтера, отсутствие единого взгляда на патогенез и подходы к терапии делают поиск эффективных лекарственных препаратов актуальной задачей, поэтому каждое клиническое наблюдение вызывает несомненный интерес.Представлено клиническое наблюдение пациента с хлл неблагоприятного молекулярно-цитогенетического риска с трансформацией в диффузную В-крупноклеточную лимфому (синдром Рихтера). Совместное применение ингибиторов bCL-2 (венетоклакса) и pI3K (дувелисиба) привело к достижению частичной ремиссии с дальнейшим, постепенно нарастающим положительным противоопухолевым эффектом.</p></trans-abstract><kwd-group xml:lang="en"><kwd>chronic lymphocytic leukemia</kwd><kwd>poor prognosis</kwd><kwd>Richter’s syndrome</kwd><kwd>venetoclax</kwd><kwd>duvelisib</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>хронический лимфолейкоз</kwd><kwd>неблагоприятный прогноз</kwd><kwd>синдром Рихтера</kwd><kwd>венетоклакс</kwd><kwd>дувелисиб</kwd></kwd-group><funding-group/></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><citation-alternatives><mixed-citation xml:lang="en">Hallek M. Chronic lymphocytic leukemia. Klinicheskaya onkogematologiya = Clinical oncohematology 2010;3(1):101–2. (In Russ.).</mixed-citation><mixed-citation xml:lang="ru">Hallek M. Хронический лимфолейкоз. 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