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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">900</article-id><article-id pub-id-type="doi">10.17650/1818-8346-2024-19-1-83-91</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>DIAGNOSTIC OPPORTUNITIES AND TREATMENT ADVANCES</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>ВОЗМОЖНОСТИ ДИАГНОСТИКИ И УСПЕХИ ЛЕЧЕНИЯ</subject></subj-group><subj-group subj-group-type="article-type"><subject></subject></subj-group></article-categories><title-group><article-title xml:lang="en">Hematological response in patients with paroxysmal nocturnal hemoglobinuria treated with C5-inhibitor</article-title><trans-title-group xml:lang="ru"><trans-title>Оценка гематологического ответа на терапию ингибиторами С5-компонента комплемента упациентов спароксизмальной ночной гемоглобинурией</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-0643-8807</contrib-id><name-alternatives><name xml:lang="en"><surname>Latyshev</surname><given-names>V. D.</given-names></name><name xml:lang="ru"><surname>Латышев</surname><given-names>В. Д.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Vitaliy Dmitrievich Latyshev</p><p>4 Novyy Zykovskiy Proezd, Moscow 125167</p></bio><bio xml:lang="ru"><p>Виталий Дмитриевич Латышев</p><p>125167 Москва, Новый Зыковский пр-д, 4</p></bio><email>LatyshevVD@gmail.com</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-0934-6094</contrib-id><name-alternatives><name xml:lang="en"><surname>Fidarova</surname><given-names>Z. T.</given-names></name><name xml:lang="ru"><surname>Фидарова</surname><given-names>З. Т.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>4 Novyy Zykovskiy Proezd, Moscow 125167</p></bio><bio xml:lang="ru"><p>125167 Москва, Новый Зыковский пр-д, 4</p></bio><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-1218-0796</contrib-id><name-alternatives><name xml:lang="en"><surname>Ponomarev</surname><given-names>R. V.</given-names></name><name xml:lang="ru"><surname>Пономарев</surname><given-names>Р. В.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>4 Novyy Zykovskiy Proezd, Moscow 125167</p></bio><bio xml:lang="ru"><p>125167 Москва, Новый Зыковский пр-д, 4</p></bio><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-0977-215X</contrib-id><name-alternatives><name xml:lang="en"><surname>Tsvetaeva</surname><given-names>N. V.</given-names></name><name xml:lang="ru"><surname>Цветаева</surname><given-names>Н. В.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>4 Novyy Zykovskiy Proezd, Moscow 125167</p></bio><bio xml:lang="ru"><p>125167 Москва, Новый Зыковский пр-д, 4</p></bio><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-2449-2682</contrib-id><name-alternatives><name xml:lang="en"><surname>Mikhaylova</surname><given-names>E. A.</given-names></name><name xml:lang="ru"><surname>Михайлова</surname><given-names>Е. А.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>4 Novyy Zykovskiy Proezd, Moscow 125167</p></bio><bio xml:lang="ru"><p>125167 Москва, Новый Зыковский пр-д, 4</p></bio><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-8774-850X</contrib-id><name-alternatives><name xml:lang="en"><surname>Lukina</surname><given-names>E. A.</given-names></name><name xml:lang="ru"><surname>Лукина</surname><given-names>Е. А.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>4 Novyy Zykovskiy Proezd, Moscow 125167</p></bio><bio xml:lang="ru"><p>125167 Москва, Новый Зыковский пр-д, 4</p></bio><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-6177-3566</contrib-id><name-alternatives><name xml:lang="en"><surname>Parovichnikova</surname><given-names>E. N.</given-names></name><name xml:lang="ru"><surname>Паровичникова</surname><given-names>Е. Н.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>4 Novyy Zykovskiy Proezd, Moscow 125167</p></bio><bio xml:lang="ru"><p>125167 Москва, Новый Зыковский пр-д, 4</p></bio><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">National Medical Research Center for Hematology, Ministry of Health of Russia</institution></aff><aff><institution xml:lang="ru">ФГБУ «Национальный медицинский исследовательский центр гематологии» Минздрава России</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2024-01-27" publication-format="electronic"><day>27</day><month>01</month><year>2024</year></pub-date><volume>19</volume><issue>1</issue><issue-title xml:lang="en"/><issue-title xml:lang="ru"/><fpage>83</fpage><lpage>91</lpage><history><date date-type="received" iso-8601-date="2024-01-27"><day>27</day><month>01</month><year>2024</year></date><date date-type="accepted" iso-8601-date="2024-01-27"><day>27</day><month>01</month><year>2024</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/900">https://oncohematology.abvpress.ru/ongm/article/view/900</self-uri><abstract xml:lang="en"><p><bold>Background</bold>. Paroxysmal nocturnal hemoglobinuria is a rare clonal disease of the hematopoietic system, with the key manifestations of hemolytic anemia, a high thrombosis rate, and bone marrow failure. Despite the high efficacy of C5‑inhibitors in intravascular hemolysis cessation, a significant proportion of patients remain anemic. Causes of a sub‑optimal response may include C3‑mediated extravascular (intracellular) hemolysis, residual intravascular hemolysis, or bone marrow failure.</p><p><bold>Aim</bold>. To analyze the results of pathogenetic therapy in patients with paroxysmal nocturnal hemoglobinuria.</p><p><bold>Materials and methods.</bold> The study included 55 patients with paroxysmal nocturnal hemoglobinuria receiving complement C5 inhibitors for at least 6 months. Results. Suboptimal hematological response was observed in 31/55 (56 %) patients. The most common cause of anemia in the partial response group was C3‑mediated extravascular hemolysis in 8/10 (80 %), while bone marrow failure predominated (57 %) in the minor response group.</p><p><bold>Conclusion</bold>. The study showed a high frequency of suboptimal response to pathogenetic therapy and necessity of ac‑curate determination of leading cause of persistent anemia in order to modify therapy or switch to other drugs.</p></abstract><trans-abstract xml:lang="ru"><p><bold>Введение</bold>. Пароксизмальная ночная гемоглобинурия – редкое клональное заболевание кроветворной системы, ключевыми признаками которого являются гемолитическая анемия, тромбозы и костномозговая недостаточность. Несмотря на высокую эффективность ингибиторов С5‑компонента комплемента в подавлении внутрисосудистого гемолиза, значительная часть пациентов имеют субоптимальный ответ на патогенетическую терапию. В качестве причин субоптимального ответа могут выступать С3‑опосредованный экстраваскулярный (внесосудистый; синоним – внутриклеточный) гемолиз, остаточный внутрисосудистый гемолиз или костномозговая недостаточность.</p><p><bold>Цель исследования</bold> – анализ результатов патогенетической терапии у пациентов с пароксизмальной ночной гемоглобинурией.</p><p><bold>Материалы и методы</bold>. В исследование включены 55 пациентов с пароксизмальной ночной гемоглобинурией, получающих ингибиторы С5-компонента комплемента не менее 6 мес.</p><p><bold>Результаты</bold>. Субоптимальный гематологический ответ отмечался у 31 (56 %) из 55 пациентов. Наиболее частой причиной анемии в группе частичного ответа являлся С3‑опосредованный внесосудистый гемолиз (8/10 (80 %)), в то время как при малом ответе преобладала костномозговая недостаточность (12/21 (57 %)).</p><p><bold>Заключение</bold>. Результаты показали высокую частоту субоптимального ответа на патогенетическую терапию и необходимость точного определения ведущей причины сохраняющейся анемии в целях разработки патогенетически обоснованных подходов к повышению эффективности терапии пароксизмальной ночной гемоглобинурии.</p></trans-abstract><kwd-group xml:lang="en"><kwd>paroxysmal nocturnal hemoglobinuria</kwd><kwd>eculizumab</kwd><kwd>ravulizumab</kwd><kwd>pegcetacoplan</kwd><kwd>C3‑mediated hemolysis</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>пароксизмальная ночная гемоглобинурия</kwd><kwd>экулизумаб</kwd><kwd>равулизумаб</kwd><kwd>пэгцетакоплан</kwd><kwd>C3‑опосредованный гемолиз</kwd></kwd-group><funding-group/></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Brodsky R.A. How I treat paroxysmal nocturnal hemoglobinuria. Blood 2021;137(10):1304–9. 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