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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">760</article-id><article-id pub-id-type="doi">10.24287/1726-1708-2023-22-4-102-107</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">Clinicogenomic associations in patients with Langerhans cell histiocytosis: a cohort study</article-title><trans-title-group xml:lang="ru"><trans-title>Клинико-геномные ассоциации у пациентов с гистиоцитозом из клеток Лангерганса: когортное исследование</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-9968-9332</contrib-id><name-alternatives><name xml:lang="en"><surname>Osipova</surname><given-names>D. S.</given-names></name><name xml:lang="ru"><surname>Осипова</surname><given-names>Д. С.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Daria S. Osipova, a research technician at the Laboratory of Molecular Biology</p><p>1 Samory Mashela St., Moscow 117997</p></bio><bio xml:lang="ru"><p>Осипова Дарья Сергеевна, лаборант-исследователь лаборатории молекулярной биологии</p><p>117997, Москва, ул. Саморы Машела, 1</p></bio><email>darya.osipova@fccho-moscow.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-7634-2053</contrib-id><name-alternatives><name xml:lang="en"><surname>Raykina</surname><given-names>E. V.</given-names></name><name xml:lang="ru"><surname>Райкина</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><email>e_raikina@inbox.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0009-0006-5928-8557</contrib-id><name-alternatives><name xml:lang="en"><surname>Kozlova</surname><given-names>Yu. A.</given-names></name><name xml:lang="ru"><surname>Козлова</surname><given-names>Ю. 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><email>ucheb16@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-0717-2019</contrib-id><name-alternatives><name xml:lang="en"><surname>Lyudovskikh</surname><given-names>E. I.</given-names></name><name xml:lang="ru"><surname>Людовских</surname><given-names>Э. 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><email>evcola@yandex.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-8610-0624</contrib-id><name-alternatives><name xml:lang="en"><surname>Evseev</surname><given-names>D. A.</given-names></name><name xml:lang="ru"><surname>Евсеев</surname><given-names>Д. 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><email>dmitry.evseev@fccho-moscow.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-0813-5626</contrib-id><name-alternatives><name xml:lang="en"><surname>Kalinina</surname><given-names>I. I.</given-names></name><name xml:lang="ru"><surname>Калинина</surname><given-names>И. 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><email>Irina.Kalinina@fccho-moscow.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-7130-8596</contrib-id><name-alternatives><name xml:lang="en"><surname>Baydildina</surname><given-names>D. D.</given-names></name><name xml:lang="ru"><surname>Байдильдина</surname><given-names>Д. Д.</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><email>Dina.Baydildina@fccho-moscow.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-7578-9657</contrib-id><name-alternatives><name xml:lang="en"><surname>Voronin</surname><given-names>K. A.</given-names></name><name xml:lang="ru"><surname>Воронин</surname><given-names>К. 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><email>kirill.voronin@fccho-moscow.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-0016-6698</contrib-id><name-alternatives><name xml:lang="en"><surname>Maschan</surname><given-names>A. A.</given-names></name><name xml:lang="ru"><surname>Масчан</surname><given-names>А. 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><email>Aleksey.Maschan@fccho-moscow.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-1735-0093</contrib-id><name-alternatives><name xml:lang="en"><surname>Maschan</surname><given-names>M. A.</given-names></name><name xml:lang="ru"><surname>Масчан</surname><given-names>М. 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><email>Michael.Maschan@fccho-moscow.ru</email><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Dmitry Rogachev National Medical Research Center of Pediatric Hematology, Oncology and Immunology of Ministry of Healthcare 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><pub-date date-type="pub" iso-8601-date="2023-12-20" publication-format="electronic"><day>20</day><month>12</month><year>2023</year></pub-date><volume>22</volume><issue>4</issue><issue-title xml:lang="en"/><issue-title xml:lang="ru"/><fpage>102</fpage><lpage>107</lpage><history><date date-type="received" iso-8601-date="2023-09-18"><day>18</day><month>09</month><year>2023</year></date><date date-type="accepted" iso-8601-date="2023-10-17"><day>17</day><month>10</month><year>2023</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2023, «D. Rogachev NMRCPHOI»</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2023, ФГБУ «НМИЦ ДГОИ им. Дмитрия Рогачева» Минздрава России</copyright-statement><copyright-year>2023</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/760">https://hemoncim.com/jour/article/view/760</self-uri><abstract xml:lang="en"><p>This article presents an analysis of genotype and phenotype correlations in a pediatric cohort with Langerhans cell histiocytosis (LCH). Approximately 60% of LCH patients carry <italic>BRAF</italic> V600E somatic point mutation. Numerous studies have demonstrated that the presence of this mutation is associated with a more severe course of the disease and a higher risk of relapse. Apart from <italic>BRAF</italic> V600E mutation, other mutations in genes involved in the RAS/RAF/MEK/ERK signaling pathway have been identified in LCH. Next generation sequencing of DNA with high coverage of target regions is considered an optimal approach to detect somatic mutations other than <italic>BRAF</italic> V600E. The identification of somatic driver mutations holds great potential for enhancing our understanding of the phenotypic heterogeneity of LCH and developing targeted therapeutic strategies. 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.</p></abstract><trans-abstract xml:lang="ru"><p>В статье представлены данные по анализу генотип-фенотипических корреляций в педиатрической когорте пациентов с гистиоцитозом из клеток Лангерганса (ГКЛ). Примерно у 60% пациентов с ГКЛ обнаруживается точечная соматическая мутация <italic>BRAF</italic> V600E. Многие исследования показали, что наличие данной мутации ассоциировано с более тяжелым течением заболевания и с большей вероятностью рецидива. Кроме <italic>BRAF</italic> V600E при ГКЛ были описаны другие мутации в генах-участниках сигнального пути RAS/RAF–MEK–ERK. Оптимальным методом поиска мутаций, отличных от <italic>BRAF</italic> V600E, является высокопроизводительное секвенирование (Next Generation Sequencing) ДНК с большой глубиной прочтения таргетных регионов. Определение драйверной соматической мутации позволит улучшить понимание фенотипической гетерогенности ГКЛ и подходы к таргетной терапии. Исследование одобрено независимым этическим комитетом и утверждено решением ученого совета НМИЦ ДГОИ им. Дмитрия Рогачева.</p></trans-abstract><kwd-group xml:lang="en"><kwd>children</kwd><kwd>Langerhans cell histiocytosis</kwd><kwd>BRAF V600E mutation</kwd><kwd>next generation sequencing</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>дети</kwd><kwd>гистиоцитоз из клеток Лангерганса</kwd><kwd>мутация BRAF V600E</kwd><kwd>высокопроизводительное секвенирование</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Исследование проведено при поддержке гранта Российского научного фонда, проект №22-15-00450</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">Rumyantsev A.G., Maschan A.A. Federal clinical guidelines for the diagnosis and treatment of Langerhans cell histiocytosis. 2014.</mixed-citation><mixed-citation xml:lang="ru">Румянцев А.Г., Масчан А.А. 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