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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">pediatricjournal</journal-id><journal-title-group><journal-title xml:lang="ru">Архив педиатрии и детской хирургии</journal-title><trans-title-group xml:lang="en"><trans-title>Archives of Pediatrics and Pediatric Surgery</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2949-4664</issn><issn pub-type="epub">3033-6783</issn><publisher><publisher-name>НИКИ детства Минздрава Московской области</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.31146/2949-4664-apps-2-1-142-147</article-id><article-id custom-type="elpub" pub-id-type="custom">pediatricjournal-67</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>КЛИНИЧЕСКИЙ СЛУЧАЙ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>CLINICAL CASE</subject></subj-group></article-categories><title-group><article-title>Впервые описанный патогенный вариант c.2617G&gt;T гена CFTR</article-title><trans-title-group xml:lang="en"><trans-title>The first described pathogenic variant c.2617G&gt;T of the CFTR gene</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-8814-5532</contrib-id><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><email xlink:type="simple">melcat@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/0000-0001-6395-0407</contrib-id><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><email xlink:type="simple">noemail@neicon.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru">Государственное бюджетное учреждение здравоохранения Московской области «Научно-исследовательский клинический институт детства Министерства здравоохранения Московской области»; Федеральное государственное бюджетное научное учреждение «Медико-генетический научный центр имени академика Н. П. Бочкова»<country>Россия</country></aff><aff xml:lang="en">Research Clinical Institute of Childhood of the Ministry of Health of the Moscow Region; Research Center for Medical Genetics<country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2024</year></pub-date><pub-date pub-type="epub"><day>26</day><month>03</month><year>2024</year></pub-date><volume>2</volume><issue>1</issue><fpage>142</fpage><lpage>147</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Мельяновская Ю.Л., Кондратьева Е.И., 2024</copyright-statement><copyright-year>2024</copyright-year><copyright-holder xml:lang="ru">Мельяновская Ю.Л., Кондратьева Е.И.</copyright-holder><copyright-holder xml:lang="en">Melyanovskaya Y.L., Kondratyeva E.I.</copyright-holder><license 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.nikid.ru/jour/article/view/67">https://journal.nikid.ru/jour/article/view/67</self-uri><abstract><p>Муковисцидоз (МВ) заболевание, обусловленное патогенными вариантами в гене CFTR. Наибольшую трудность в настоящий момент представляет оценка вклада в развитие заболевания редких и ранее не идентифицированных генетических варианта (мутаций), мутаций с неопределенным клиническим значением, а также определение связи генотип-фенотип. Необходимы дополнительные методы диагностики в связи с большим числом пациентов с пограничными значениями потовой пробы. Цель исследования: изучить патогенность вновь выявленного варианта нуклеотидной последовательности гена CFTR на основе оценки функциональной активности эпителиальных ионных каналов (ENaC, CFTR, CaCCs). Материалы и методы: данные истории болезни, метод определения разницы кишечных потенциалов (ОРКП). Результаты: у пациента отмечено тяжелое течение заболевания. Положительные результаты потовой пробы, низкая панкреатическая эластаза кала. Методом ОРКП было показано отсутствие функции хлорного канала. Заключение: впервые описаны клинические особенности пациента с генетическим вариантом c.2617G&gt;T в генотипе. Результаты проведенного обследования, клиническое течение заболевания соответствуют тяжелому течению заболевания. Дополнительное применение метода ОРКП подтвердило отсутствие функции CFTR канала у пациента-носителя данного варианта гена CFTR.</p></abstract><trans-abstract xml:lang="en"><p>Cystic fibrosis (CF) is a disease caused by pathogenic variants in the CFTR gene. The greatest difficulty at the moment is assessing the contribution to the development of the disease of rare and previously unidentified genetic variants (mutations), mutations of uncertain clinical significance, as well as determining the genotype-phenotype relationship. Additional diagnostic methods are needed due to the large number of patients with borderline sweat test values. Purpose of the study: to study the pathogenicity of a newly identified variant of the nucleotide sequence of the CFTR gene based on assessing the functional activity of epithelial ion channels (ENaC, CFTR, CaCCs). Materials and methods: medical history data, method intestinal current measurement (ICM). Results: the patient had a severe course of the disease. Positive sweat test results, low fecal pancreatic elastase. The ICM method showed the absence of chlorine channel function. Conclusion: For the first time, the clinical features of a patient with the c.2617G&gt;T genetic variant in the genotype have been described. The results of the examination and the clinical course of the disease correspond to the severe course of the disease. Additional use of the ICM method confirmed the absence of CFTR channel function in a patient carrier of this variant of the CFTR gene.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>муковисцидоз</kwd><kwd>метод определения разницы кишечных потенциалов</kwd><kwd>редкий вариант CFTR</kwd></kwd-group><kwd-group xml:lang="en"><kwd>cystic fibrosis</kwd><kwd>method for intestinal current measurement</kwd><kwd>rare CFTR variant</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">De Boeck K. Cystic fibrosis in the year 2020: A disease with a new face. Acta Paediatr. 2020 May;109(5):893-899. doi: 10.1111/apa.15155.</mixed-citation><mixed-citation xml:lang="en">De Boeck K. Cystic fibrosis in the year 2020: A disease with a new face. 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