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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">gastro-j</journal-id><journal-title-group><journal-title xml:lang="ru">Российский журнал гастроэнтерологии, гепатологии, колопроктологии</journal-title><trans-title-group xml:lang="en"><trans-title>Russian Journal of Gastroenterology, Hepatology, Coloproctology</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">1382-4376</issn><issn pub-type="epub">2658-6673</issn><publisher><publisher-name>«Gastro» LLC</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.22416/1382-4376-2025-1829-5206</article-id><article-id custom-type="elpub" pub-id-type="custom">gastro-j-1961</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>ОРИГИНАЛЬНЫЕ ИССЛЕДОВАНИЯ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>ORIGINAL ARTICLES</subject></subj-group></article-categories><title-group><article-title>Полиморфизмы генов свертывания у пациентов с детским дебютом нецирротического тромбоза воротной вены</article-title><trans-title-group xml:lang="en"><trans-title>Coagulation Gene Polymorphisms in Patients with Pediatric-Onset Non-Cirrhotic Portal Vein Thrombosis</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-1210-2528</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Надинская</surname><given-names>М. Ю.</given-names></name><name name-style="western" xml:lang="en"><surname>Nadinskaia</surname><given-names>M. Yu.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Надинская Мария Юрьевна — кандидат медицинских наук, доцент кафедры пропедевтики внутренних болезней, гастроэнтерологии и гепатологии</p><p>119048, г. Москва, ул. Трубецкая, 8, стр. 2 </p></bio><bio xml:lang="en"><p>Maria Yu. Nadinskaia — Cand. Sci. (Med.), Associate Professor at the Department of Propaedeutics of Internal Diseases, Gastroenterology and Hepatology</p><p>119048, Moscow, Trubetskaya str., 8, build. 2 </p></bio><email xlink:type="simple">nadinskaya_m_yu@staff.sechenov.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/0000-0002-3462-0123</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Гуляева</surname><given-names>К. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Gulyaeva</surname><given-names>K. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Гуляева Ксения Александровна — ассистент кафедры пропедевтики внутренних болезней, гастроэнтерологии и гепатологии</p><p>119048, г. Москва, ул. Трубецкая, 8, стр. 2 </p></bio><bio xml:lang="en"><p>Kseniya A. Gulyaeva — Teaching Assistant at the Department of Propaedeutics of Internal Diseases, Gastroenterology and Hepatology</p><p>119048, Moscow, Trubetskaya str., 8, build. 2 </p></bio><email xlink:type="simple">gulyaeva_k_a@staff.sechenov.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/0009-0006-4570-592X</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Трашкун</surname><given-names>Э.</given-names></name><name name-style="western" xml:lang="en"><surname>Trashkun</surname><given-names>E.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Трашкун Эвелина — студентка Института международного образования </p><p>119048, г. Москва, ул. Трубецкая, 8, стр. 2 </p></bio><bio xml:lang="en"><p>Evelina Trashkun — Student, Institute of International Education</p><p>119048, Moscow, Trubetskaya str., 8, build. 2 </p></bio><email xlink:type="simple">trashkun02@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/0009-0006-0156-7668</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Дадунц</surname><given-names>Д.</given-names></name><name name-style="western" xml:lang="en"><surname>Daduns</surname><given-names>D.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Дадунц Диана — студентка Института международного образования </p><p>119048, г. Москва, ул. Трубецкая, 8, стр. 2 </p></bio><bio xml:lang="en"><p>Diana Daduns — Student, Institute of International Education </p><p>119048, Moscow, Trubetskaya str., 8, build. 2 </p></bio><email xlink:type="simple">dadunsdiana2002@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/0000-0002-6836-4228</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Привалов</surname><given-names>М. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Privalov</surname><given-names>M. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Привалов Максим Александрович — ординатор, аспирант кафедры онкологии, радиотерапии и реконструктивной хирургии</p></bio><bio xml:lang="en"><p>Maxim A. Privalov — Resident, Postgraduate at the Department of Oncology, Radiotherapy and Reconstructive Surgery</p><p>119048, Moscow, Trubetskaya str., 8, build. 2 </p></bio><email xlink:type="simple">makspr24@gmail.com</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-6815-6015</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Ивашкин</surname><given-names>В. Т.</given-names></name><name name-style="western" xml:lang="en"><surname>Ivashkin</surname><given-names>V. T.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Ивашкин Владимир Трофимович — доктор медицинских наук, профессор, академик РАН, заведующий кафедрой пропедевтики внутренних болезней, гастроэнтерологии и гепатологии; директор Клиники пропедевтики внутренних болезней, гастроэнтерологии и гепатологии им. В.Х. Василенко</p><p>119048, г. Москва, ул. Трубецкая, 8, стр. 2 </p></bio><bio xml:lang="en"><p>Vladimir T. Ivashkin— Dr. Sci. (Med.), Professor, Academician of the Russian Academy of Sciences, Head of the Department of Propaedeutics of Internal Diseases, Gastroenterology and Hepatology; Director of the V.Kh. Vasilenko Clinic of Internal Disease Propaedeutics, Gastroenterology and Hepatology</p><p>119048, Moscow, Trubetskaya str., 8, build. 2 </p></bio><email xlink:type="simple">ivashkin_v_t@staff.sechenov.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>ФГАОУ ВО «Первый Московский государственный медицинский университет им. И.М. Сеченова» Министерства здравоохранения Российской Федерации (Сеченовский Университет)</institution><country>Россия</country></aff><aff xml:lang="en"><institution>I.M. Sechenov First Moscow State Medical University (Sechenov University)</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2025</year></pub-date><pub-date pub-type="epub"><day>23</day><month>02</month><year>2026</year></pub-date><volume>35</volume><issue>6</issue><fpage>60</fpage><lpage>71</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Надинская М.Ю., Гуляева К.А., Трашкун Э., Дадунц Д., Привалов М.А., Ивашкин В.Т., 2026</copyright-statement><copyright-year>2026</copyright-year><copyright-holder xml:lang="ru">Надинская М.Ю., Гуляева К.А., Трашкун Э., Дадунц Д., Привалов М.А., Ивашкин В.Т.</copyright-holder><copyright-holder xml:lang="en">Nadinskaia M.Y., Gulyaeva K.A., Trashkun E., Daduns D., Privalov M.A., Ivashkin V.T.</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.gastro-j.ru/jour/article/view/1961">https://www.gastro-j.ru/jour/article/view/1961</self-uri><abstract><sec><title>Цель</title><p>Цель: изучить частоту полиморфизмов генов коагуляции, фолатного цикла, рецепторов тромбоцитов, ингибитора сериновой протеазы класса Е, член 1 (SERPINE1, serine protease inhibitor clade E member 1), лиганда P-селектина (SELPLG, selectin P ligand) и янус-киназы 2 (JAK2, Janus kinase 2) у пациентов с детским дебютом тромбоза воротной вены (ТВВ).</p></sec><sec><title>Материалы и методы</title><p>Материалы и методы. Проведено поперечное исследование, в которое включен 31 пациент с детским дебютом нецирротического ТВВ. Все участники исследования были европейского происхождения. Методом полимеразной цепной реакции изучены полиморфизмы генов: F2 (rs1799963), F5 (rs6025), FGB (fibrinogen beta chain, бета-цепь фибриногена) (rs1800790), ITGA2 (integrin subunit alpha 2, интегрин альфа-2) (rs1126643), ITGB3 (integrin subunit beta 3, интегрин бета-3) (rs5918), MTHFR (methylenetetrahydrofolate reductase, метилентетрагидрофолатредуктаза) (rs1801133), SERPINE1 (rs1799889), SELPLG (rs2228315) и JAK2 (rs77375493). У 12 (39 %) пациентов в анамнезе отмечались локальные факторы риска ТВВ в раннем неонатальном периоде: омфалит, пупочный сепсис, катетеризация пупочной вены.</p></sec><sec><title>Результаты</title><p>Результаты. Мутация в генах F2 (rs1799963) и F5 (rs6025) выявлена у двух пациентов. Аллель А гена FGB (rs1800790) встречался с частотой 21 %, аллель Т в гене ITGA2 (rs1126643) — с частотой 37,1 %, аллель Т в гене MTHFR (rs1801133) — 32,3 %. Полиморфизм 4G в гене SERPINE1 (rs1799889) оказался самым частым: у 18 (58 %) выявлен в гомозиготной форме, у 9 (29 %) — в гетерозиготной форме; частота встречаемости аллеля 4G составила 72,6 %. Соматическая мутация JAK2 (rs77375493) не выявлена ни у одного из пациентов. Наличие мутации в генах F2 и F5 либо гомозиготные варианты полиморфизмов в других изученных генах выявлены у 24 (77 %) пациентов. У 15 (48 %) пациентов имелся один генетический фактор риска, у 6 (19 %) — два и у 3 (10 %) — три. Между пациентами с наличием и отсутствием локальных факторов различий по частоте отдельных полиморфизмов не установлено. Вместе с этим сочетание аллеля А гена FGB и аллеля С гена ITGB3 отмечалось статистически значимо чаще у пациентов при наличии локальных факторов по сравнению с их отсутствием (33 % vs. 5 %; p = 0,039).</p></sec><sec><title>Выводы</title><p>Выводы. На небольшой выборке российской популяции пациентов с дебютом ТВВ в детском возрасте показано наличие как известных тромбофилических мутаций в генах F2 и F5, так и полиморфизмы генов SERPINE1, MTHFR, FGB, ITGA2, ITGB3 и SELPLG, потенциально повышающих риск тромбоза.</p></sec></abstract><trans-abstract xml:lang="en"><sec><title>Aim</title><p>Aim: to investigate the frequency of gene polymorphisms related to coagulation, the folate cycle, platelet receptors, serine protease inhibitor clade E member 1 (SERPINE1), selectin P ligand (SELPLG), and Janus kinase 2 (JAK2) in patients with pediatric-onset portal vein thrombosis (PVT).</p></sec><sec><title>Materials and methods</title><p>Materials and methods. A cross-sectional study was conducted, including patients with pediatric-onset non-cirrhotic PVT (n = 31), all of European ancestry. Polymerase chain reaction was used to genotype the following polymorphisms: F2 (rs1799963), F5 (rs6025), FGB (fibrinogen beta chain) (rs1800790), ITGA2 (integrin subunit alpha 2) (rs1126643), ITGB3 (integrin subunit beta 3) (rs5918), MTHFR (methylenetetrahydrofolate reductase) (rs1801133), SERPINE1 (rs1799889), SELPLG (rs2228315), and JAK2 (rs77375493). A history of local risk factors for PVT in the early neonatal period was noted in 12 (39 %) patients, including omphalitis, umbilical sepsis, and umbilical vein catheterization.</p></sec><sec><title>Results</title><p>Results. Mutations in the F2 (rs1799963) and F5 (rs6025) genes were identified in two patients. The A allele of the FGB gene (rs1800790) was found with a frequency of 21 %, the T allele of the ITGA2 gene (rs1126643) with a frequency of 37.1 %, and the T allele of the MTHFR gene (rs1801133) with a frequency of 32.3 %. The 4G polymorphism in the SERPINE1 gene (rs1799889) was the most frequent: it was found in the homozygous form in 18 (58 %) patients and in the heterozygous form in 9 (29 %) patients; the frequency of the 4G allele was 72.6 %. The somatic JAK2 mutation (rs77375493) was not detected in any of the patients. The presence of either a mutation in the F2 or F5 genes, or homozygous variants for the other studied polymorphisms, was identified in 24 (77 %) patients. A single genetic risk factor was present in 15 (48 %) patients, two factors — in 6 (19 %) patients, and three factors — in 3 (10 %) patients. No significant differences in the frequency of individual polymorphisms were found between patients with and without local risk factors. However, the combination of the A allele of the FGB gene and the C allele of the ITGB3 gene was observed significantly more frequently in patients with local risk factors compared to those without (33 % vs. 5 %; p = 0.039).</p></sec><sec><title>Conclusion</title><p>Conclusion. In a small Russian cohort of patients with pediatric-onset PVT, well-known thrombophilic mutations in the F2 and F5 genes were identified. Also, polymorphisms in SERPINE1, MTHFR, FGB, ITGA2, ITGB3, and SELPLG genes were identified, which potentially contribute to an increased risk of thrombosis.</p></sec></trans-abstract><kwd-group xml:lang="ru"><kwd>F2 (rs1799963)</kwd><kwd>F5 (rs6025)</kwd><kwd>FGB (rs1800790)</kwd><kwd>ITGA2 (rs1126643)</kwd><kwd>ITGB3 (rs5918)</kwd><kwd>MTHFR (rs1801133)</kwd><kwd>SERPINE1 (rs1799889)</kwd><kwd>SELPLG (rs2228315) и JAK2 (rs77375493)</kwd></kwd-group><kwd-group xml:lang="en"><kwd>F2 (rs1799963)</kwd><kwd>F5 (rs6025)</kwd><kwd>FGB (rs1800790)</kwd><kwd>ITGA2 (rs1126643)</kwd><kwd>ITGB3 (rs5918)</kwd><kwd>MTHFR (rs1801133)</kwd><kwd>SERPINE1 (rs1799889)</kwd><kwd>SELPLG (rs2228315) and JAK2 (rs77375493)</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">Wani Z.A., Bhat R.A., Bhadoria A.S., Maiwall R. 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