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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">medgen</journal-id><journal-title-group><journal-title xml:lang="ru">Медицинская генетика</journal-title><trans-title-group xml:lang="en"><trans-title>Medical Genetics</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2073-7998</issn><publisher><publisher-name>Publishing House «Genius Media» LLC</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.25557/2073-7998.2025.11.27-36</article-id><article-id custom-type="elpub" pub-id-type="custom">medgen-3293</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>ОРИГИНАЛЬНОЕ ИССЛЕДОВАНИЕ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>ORIGINAL ARTICLE</subject></subj-group></article-categories><title-group><article-title>Исследование влияния таргетной терапии на восстановление функционального CFTR-канала у пациента с генотипом E403D/CFTRdele2,3</article-title><trans-title-group xml:lang="en"><trans-title>Study of the effect of targeted therapy on the restoration of the functional CFTR channel in a patient with the E403D/CFTRdele2,3 genotype</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Мельяновская</surname><given-names>Ю. Л.</given-names></name><name name-style="western" xml:lang="en"><surname>Melyanovskaya</surname><given-names>Yu. L.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Мельяновская Юлия Леонидовна</p><p>115522, Москва, ул. Москворечье, д. 1</p></bio><bio xml:lang="en"><p>Yulia L. Melyanovskaya</p><p>1, Moskvorechye st., Moscow, 115478</p></bio><email xlink:type="simple">melcat@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Краснова</surname><given-names>М. Г.</given-names></name><name name-style="western" xml:lang="en"><surname>Krasnova</surname><given-names>M. G.</given-names></name></name-alternatives><bio xml:lang="en"><p>1, Moskvorechye st., Moscow, 115478</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Ефремова</surname><given-names>А. С.</given-names></name><name name-style="western" xml:lang="en"><surname>Efremova</surname><given-names>A. S.</given-names></name></name-alternatives><bio xml:lang="en"><p>1, Moskvorechye st., Moscow, 115478</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Мокроусова</surname><given-names>Д. О.</given-names></name><name name-style="western" xml:lang="en"><surname>Mokrousova</surname><given-names>D. O.</given-names></name></name-alternatives><bio xml:lang="en"><p>1, Moskvorechye st., Moscow, 115478</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Шерман</surname><given-names>В. Д.</given-names></name><name name-style="western" xml:lang="en"><surname>Sherman</surname><given-names>V. D.</given-names></name></name-alternatives><bio xml:lang="en"><p>1, Moskvorechye st., Moscow, 115478</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Фатхуллина</surname><given-names>И. Р.</given-names></name><name name-style="western" xml:lang="en"><surname>Fatkhullina</surname><given-names>I. R.</given-names></name></name-alternatives><bio xml:lang="ru"><p>115522, Москва, ул. Москворечье, д. 1; 141009, Мытищи, ул. Коминтерна, д. 24 А, с. 1</p></bio><bio xml:lang="en"><p>1, Moskvorechye st., Moscow, 115478; 24 A, bldg. 1, Kominterna st., Mytishchi, Moscow Region</p></bio><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Гольдштейн</surname><given-names>Д. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Goldstein</surname><given-names>D. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>115522, Москва, ул. Москворечье, д. 1</p></bio><bio xml:lang="en"><p>1, Moskvorechye st., Moscow, 115478</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Кондратьева</surname><given-names>Е. И.</given-names></name><name name-style="western" xml:lang="en"><surname>Kondratyeva</surname><given-names>E. I.</given-names></name></name-alternatives><bio xml:lang="ru"><p>115522, Москва, ул. Москворечье, д. 1; 141009, Мытищи, ул. Коминтерна, д. 24 А, с. 1</p></bio><bio xml:lang="en"><p>1, Moskvorechye st., Moscow, 115478; 24 A, bldg. 1, Kominterna st., Mytishchi, Moscow Region</p></bio><xref ref-type="aff" rid="aff-2"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>ФГБНУ «Медико-генетический научный центр имени академика Н.П. Бочкова»</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Research Centre for Medical Genetics</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>ФГБНУ «Медико-генетический научный центр имени академика Н.П. Бочкова»; ГБУЗ МО Научно-исследовательский клинический институт детства Минздрава Московской области</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Research Centre for Medical Genetics; Childhood Research Clinical Institute of the Ministry of Health of the Moscow Region</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2025</year></pub-date><pub-date pub-type="epub"><day>24</day><month>12</month><year>2025</year></pub-date><volume>24</volume><issue>11</issue><fpage>27</fpage><lpage>36</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Мельяновская Ю.Л., Краснова М.Г., Ефремова А.С., Мокроусова Д.О., Шерман В.Д., Фатхуллина И.Р., Гольдштейн Д.В., Кондратьева Е.И., 2025</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="ru">Мельяновская Ю.Л., Краснова М.Г., Ефремова А.С., Мокроусова Д.О., Шерман В.Д., Фатхуллина И.Р., Гольдштейн Д.В., Кондратьева Е.И.</copyright-holder><copyright-holder xml:lang="en">Melyanovskaya Y.L., Krasnova M.G., Efremova A.S., Mokrousova D.O., Sherman V.D., Fatkhullina I.R., Goldstein D.V., Kondratyeva E.I.</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://www.medgen-journal.ru/jour/article/view/3293">https://www.medgen-journal.ru/jour/article/view/3293</self-uri><abstract><sec><title>Введение</title><p>Введение. Муковисцидоз (МВ) – системное наследственное заболевание, обусловленное мутацией гена CFTR и характеризующееся поражением желез внешней секреции, тяжелыми нарушениями функций органов дыхания. Считается, что при «тяжелом» генотипе клинические проявления более выражены и рано манифестируют. Вариант E403D включен в список вариантов, чувствительных к терапии CFTR модуляторами (ивакафтор-тезакафтор-элексакафтор). Однако их применение для лечения пациентки – носителя варианта E403D, не привело к ожидаемому эффекту.</p></sec><sec><title>Методы</title><p>Методы. Проведен анализ истории болезни пациента с МВ с генотипом E403D/CFTRdele2,3. Для определения разности кишечных потенциалов (ОРКП) и форсколинового теста на кишечных органоидах использовался биопсийный материал прямой кишки. ДНК для секвенирования выделялась из лейкоцитов венозной крови.</p></sec><sec><title>Результаты</title><p>Результаты. У пациентки (девочка 11 лет) с генотипом E403D/CFTRdele2,3 диагноз установлен при неонатальном скрининге.  Методом ОРКП выявлена сниженная функция CFTR-канала до старта терапии CFTR модулятором. По данным форсколинового теста на кишечных органоидах показано, что количество функционального белка на апикальной мембране кишечного эпителия не увеличивается при действии как потенциатора, так и корректора у пациентки. Клинически не получено положительной динамики от приема препарата в течение 1,5 лет.</p></sec><sec><title>Заключение</title><p>Заключение. Впервые проведен анализ функционального состояния хлорного канала пациента с генотипом E403D/CFTRdele2,3 методом ОРКП до терапии и на терапии CFTR модулятором. Показана связь тяжелых проявлений болезни с отсутствием функции хлорного CFTR канала как по данным потового теста, так и по отсутствию ответа на форсколин при ОРКП. Форсколининдуцированное набухание кишечных органоидов показало, что терапия протестированными CFTR-модуляторами не может быть рекомендована пациенту с вариантом E403D в компаунд-гетерозиготном состоянии с вариантом I или VII класса.</p></sec></abstract><trans-abstract xml:lang="en"><sec><title>Background</title><p>Background. Cystic fibrosis (CF) is a systemic hereditary disease caused by a mutation in the CFTR gene and characterized by damage to the glands of external secretion, severe respiratory dysfunction. It is believed that with a «severe» genotype, clinical manifestations are more pronounced and manifest early. Variant E403D is included in the list of variants sensitive to CFTR modulators (ivacaftor-tezacaftorelexacaftor). However, its use in clinical practice in a patient – a carrier of this variant E403D, did not lead to the expected effect.</p></sec><sec><title>Methods</title><p>Methods. The medical history of a patient with CF with the genotype E403D/CFTRdele2,3 was analyzed. Biopsy material from the rectum was used to intestinal current measurement (ICM) and forskolin-induced swelling assay in intestinal organoids. DNA for sequencing was isolated from venous blood leukocytes.</p></sec><sec><title>Results</title><p>Results. The patient (11-year-old girl) with the E403D/CFTRdele2.3 genotype was diagnosed based on neonatal screening. The ICM method revealed reduced CFTR channel function before the start of CFTR modulator therapy. According to the forskolininduced swelling assay in intestinal organoids, it was shown that the amount of functional protein on the apical membrane of the intestinal epithelium did not increase under the action of either the potentiator or the corrector in the patient. Clinically, no positive dynamics were obtained from taking the drug for 1.5 years.</p></sec><sec><title>Conclusion</title><p>Conclusion. For the first time, an analysis of the functional state of the chloride channel of a patient with the E403D/CFTRdele2,3 genotype was performed using the ICM method before therapy and during CFTR modulator therapy. A relationship was shown between severe manifestations of the disease and the absence of CFTR chloride channel function, both according to the sweat test and the absence of a response to forskolin during the ICM method. Forskolin-induced swelling of intestinal organoids showed that therapy with the tested CFTR modulators cannot be recommended for a patient with the E403D variant in a compound heterozygous state with a class I or VII variant.</p></sec></trans-abstract><kwd-group xml:lang="ru"><kwd>муковисцидоз</kwd><kwd>генотип E403D/CFTRdele2</kwd><kwd>3</kwd><kwd>ген CFTR</kwd><kwd>определение разности кишечных потенциалов</kwd><kwd>белок CFTR</kwd><kwd>кишечные органоиды</kwd><kwd>форсколиновый тест</kwd><kwd>корректоры VX-445 и VX-661</kwd><kwd>потенциатор VX-770</kwd></kwd-group><kwd-group xml:lang="en"><kwd>cystic fibrosis</kwd><kwd>E403D/CFTRdele2</kwd><kwd>3 genotype</kwd><kwd>CFTR gene</kwd><kwd>intestinal current measurement</kwd><kwd>CFTR protein</kwd><kwd>intestinal organoids</kwd><kwd>forskolin-induced swelling assay</kwd><kwd>VX-445 and VX-661 correctors</kwd><kwd>VX-770 potentiator</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Работа поддержана РНФ, грант №22-15-00473-П</funding-statement><funding-statement xml:lang="en">The work was supported by the Russian Science Foundation, grant No. 22-15-00473-П</funding-statement></funding-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Национальный консенсус «Муковисцидоз: определение, диагностические критерии, терапия». 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