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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">pulmo</journal-id><journal-title-group><journal-title xml:lang="ru">Пульмонология</journal-title><trans-title-group xml:lang="en"><trans-title>PULMONOLOGIYA</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">0869-0189</issn><issn pub-type="epub">2541-9617</issn><publisher><publisher-name>Scientific and Practical Journal “PULMONOLOGIYA” LLC</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.18093/0869-0189-2026-36-5-865-870</article-id><article-id custom-type="elpub" pub-id-type="custom">pulmo-5032</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>ЗАМЕТКИ ИЗ ПРАКТИКИ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>PRACTICAL NOTES</subject></subj-group></article-categories><title-group><article-title>Трудности проведения таргетной терапии муковисцидоза у пациентки с комплексным аллелем [L467F;F508del]: от неэффективности модуляторов первой линии терапии к успешному применению комбинации ванзакафтор + тезакафтор + дейтивакафтор</article-title><trans-title-group xml:lang="en"><trans-title>Challenges in targeted therapy for cystic fibrosis in a patient with the complex allele [L467F; F508del]: from failure of first-line modulator therapy to successful use of vanzacaftor+tezacaftor+deutivacaftor combination</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-5182-921X</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Нистарова</surname><given-names>А. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Nistarova</surname><given-names>A. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Нистарова Анастасия Витальевна – к. м. н., ассистент кафедры факультетской педиатрии</p><p>194100, Санкт-Петербург, ул. Литовская, 2  тел.: (812) 416­52-­72 </p></bio><bio xml:lang="en"><p>Anastasia V. Nistarova, Candidate of Medicine, Associate Professor, Department of Faculty Pediatrics</p><p>ul. Litovskaya 2, Saint-Petersburg, 194100  tel.: (812) 416-­52­72 </p></bio><email xlink:type="simple">anastasiyaprokopenko@bk.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-4212-416X</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Петрова</surname><given-names>С. И.</given-names></name><name name-style="western" xml:lang="en"><surname>Petrova</surname><given-names>S. I.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Петрова Светлана Ивановна – к. м. н, доцент кафедры факультетской педиатрии </p><p>194100, Санкт-Петербург, ул. Литовская, 2  тел.: (812) 416­52-­72 </p></bio><bio xml:lang="en"><p>Svetlana I. Petrova, Candidate of Medicine, Associate Professor, Department of Faculty Pediatrics</p><p>ul. Litovskaya 2, Saint-Petersburg, 194100  tel.: (812) 416-­52-72 </p></bio><email xlink:type="simple">DMSvetlana@yandex.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-5942-261X</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Пешехонова</surname><given-names>Ю. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Peshekhonova</surname><given-names>Yu. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Пешехонова Юлия Владимировна – к. м. н., заведующая педиатрическим отделением № 2 клиники </p><p>194100, Санкт-Петербург, ул. Литовская, 2 тел.: (812) 416-52­-72</p></bio><bio xml:lang="en"><p>Yulia V. Peshekhonova, Candidate of Medicine, Head of Pediatric Department No.2 of the Clinic,</p><p>ul. Litovskaya 2, Saint-Petersburg, 194100  tel.: (812) 416-­52-72 </p></bio><email xlink:type="simple">peshekhonova@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-0157-4175</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Кузнецова</surname><given-names>А. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Kuznetsova</surname><given-names>A. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Кузнецова Алла Александровна – д. м. н, профессор кафедры факультетской педиатрии</p><p>194100, Санкт-Петербург, ул. Литовская, 2  тел.: (812) 416­52-­72 </p></bio><bio xml:lang="en"><p>Alla A. Kuznetsova, Doctor of Medicine, Professor of the Department of Faculty Pediatrics</p><p>ul. Litovskaya 2, Saint-Petersburg, 194100 tel.: (812) 416­-52-­72</p></bio><email xlink:type="simple">pediatr-kuznetsova@yandex.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Федеральное государственное бюджетное образовательное учреждение высшего образования «Санкт-Петербургский государственный педиатрический медицинский университет» Министерства здравоохранения Российской Федерации</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Federal State Budgetary Educational Institution of Higher Education Saint Petersburg State Pediatric Medical University of the Ministry of Health of the Russian Federation</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2026</year></pub-date><pub-date pub-type="epub"><day>08</day><month>10</month><year>2026</year></pub-date><volume>36</volume><issue>5</issue><fpage>865</fpage><lpage>870</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Нистарова А.В., Петрова С.И., Пешехонова Ю.В., Кузнецова А.А., 2026</copyright-statement><copyright-year>2026</copyright-year><copyright-holder xml:lang="ru">Нистарова А.В., Петрова С.И., Пешехонова Ю.В., Кузнецова А.А.</copyright-holder><copyright-holder xml:lang="en">Nistarova A.V., Petrova S.I., Peshekhonova Y.V., Kuznetsova A.A.</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.pulmonology.ru/pulm/article/view/5032">https://journal.pulmonology.ru/pulm/article/view/5032</self-uri><abstract><p>Муковисцидоз (МВ) – наиболее частое наследственное аутосомно­рецессивное заболевание, обусловленное мутациями в гене CFTR. При внедрении CFTR­модуляторов кардинально изменились прогноз и качество жизни пациентов. Однако наличие комплексных аллелей может оказывать существенное влияние на эффективность таргетной терапии, при которой требуется персонализированный подход к выбору лекарственной стратегии.</p><p>Целью данной работы являлось демонстрация клинического наблюдения за пациенткой 16 лет с МВ, генотип [L467F; F508del]/CFTRdele2,3. Продемонстрированы сложности подбора терапии CFTR­модуляторами при наличии комплексного аллеля и возможность успешной коррекции лечения с использованием таргетных препаратов новых поколений на основе теста на кишечных органоидах (форсколин­стимулированное набухание).</p><p>Заключение. Продемонстрировано, что у лиц с МВ с комплексным аллелем терапия комбинацией препаратов элексакафтор + тезакафтор + ивакафтор (ЭТИ) может давать лишь частичный клинический ответ. Однако несмотря на улучшение нутритивного статуса и снижение частоты бронхолегочных обострений, отмечено сохранение высокой концентрации хлоридов пота (119–121 ммоль / л) и отсутствие положительной динамики функциональных показателей внешнего дыхания. При попытке перехода на генерический препарат ЭТИ развилась нежелательная реакция, с учетом выявленного комплексного аллеля таргетная терапия была отменена. В дальнейшем на основании положительного результата функционального теста на кишечных органоидах, показавшего чувствительность к новой комбинации препаратов ванзакафтор + тезакафтор + ивакафтор, терапия инициирована вновь, при этом достигнут выраженный положительный эффект.</p></abstract><trans-abstract xml:lang="en"><p>Cystic fibrosis (CF) is the most common inherited autosomal recessive disorder, caused by mutations in the CFTR gene. The introduction of CFTR modulators has fundamentally changed the prognosis and quality of life of patients. However, the presence of complex alleles may significantly affect the efficacy of targeted therapy, necessitating a personalized approach to the selection of pharmacological strategies.</p><sec><title>The aim</title><p>The aim. To present a clinical observation of a 16­year­old female patient with cystic fibrosis carrying the genotype [L467F;F508del]/CFTRdele2,3, which illustrates the challenges of selecting CFTR modulator therapy in the presence of a complex allele, and the possibility of successful treatment adjustment using next generation targeted agents based on an intestinal organoid test (forskolin­induced swelling).</p></sec><sec><title>Conclusion</title><p>Conclusion. This clinical case demonstrated that therapy with elexacaftor+tezacaftor+ivacaftor may provide only a partial clinical response in a patient with a complex CF allele. Despite the improvement in nutritional status and the frequency of bronchopulmonary exacerbations, high sweat chloride concentrations (119 – 121 mmol/L) persisted and there was no improvement in pulmonary function tests. An adverse reaction developed upon the attempt to switch to a generic formulation of elexacaftor+tezacaftor+ivacaftor. Given the identified complex allele, targeted therapy was discontinued. Subsequently, the positive result of the intestinal organoid functional assay demonstrated sensitivity to the novel triple combination vanzacaftor+tezacaftor+ivacaftor and prompted therapy re initiation that led to a significant clinical improvement.</p></sec></trans-abstract><kwd-group xml:lang="ru"><kwd>муковисцидоз</kwd><kwd>комплексный аллель [L467F</kwd><kwd>F508del]</kwd><kwd>ванзакафтор + тезакафтор + дейтивакафтор</kwd></kwd-group><kwd-group xml:lang="en"><kwd>cystic fibrosis</kwd><kwd>complex allele [L467F</kwd><kwd>F508del]</kwd><kwd>vanzacaftor+tezacaftor+deutivacaftor</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">Dickinson K.M., Collaco J.M. Cystic fibrosis. Pediatr. Rev. 2021; 42 (2): 55–67. DOI: 10.1542/pir.2019-0212.</mixed-citation><mixed-citation xml:lang="en">Dickinson K.M., Collaco J.M. Cystic fibrosis. Pediatr. Rev. 2021; 42 (2): 55–67. 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