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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">10.25557/2073-7998.2025.05.86-89</article-id><article-id custom-type="elpub" pub-id-type="custom">medgen-2992</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>КРАТКИЕ СООБЩЕНИЯ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>BRIEF REPORT</subject></subj-group></article-categories><title-group><article-title>Молекулярное картирование афидиколин-чувствительных ломких сайтов хромосом в ИПСК человека выявило нестабильность длинных клинически значимых генов</article-title><trans-title-group xml:lang="en"><trans-title>Molecular mapping of aphidicolin-sensitive fragile chromosome sites in human iPSCs reveals instability of long clinically relevant genes</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>Кислова</surname><given-names>А. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Kislova</surname><given-names>A. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>115478, г.Москва, ул. Москворечье, д.1</p></bio><bio xml:lang="en"><p>1, Moskvorechie st., Moscow, 115522, Russian Federation</p></bio><email xlink:type="simple">anastasiiakislovav@gmail.com</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>Свиридов</surname><given-names>Ф. С.</given-names></name><name name-style="western" xml:lang="en"><surname>Sviridov</surname><given-names>F. S.</given-names></name></name-alternatives><bio xml:lang="ru"><p>115478, г.Москва, ул. Москворечье, д.1</p></bio><bio xml:lang="en"><p>1, Moskvorechie st., Moscow, 115522, Russian Federation</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>Пожитнова</surname><given-names>В. О.</given-names></name><name name-style="western" xml:lang="en"><surname>Pozhitnova</surname><given-names>V. O.</given-names></name></name-alternatives><bio xml:lang="ru"><p>115478, г.Москва, ул. Москворечье, д.1</p></bio><bio xml:lang="en"><p>1, Moskvorechie st., Moscow, 115522, Russian Federation</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>Свиридова</surname><given-names>В. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Sviridova</surname><given-names>V. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>115478, г.Москва, ул. Москворечье, д.1</p></bio><bio xml:lang="en"><p>1, Moskvorechie st., Moscow, 115522, Russian Federation</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>Киселев</surname><given-names>Д. С.</given-names></name><name name-style="western" xml:lang="en"><surname>Kiselev</surname><given-names>D. S.</given-names></name></name-alternatives><bio xml:lang="ru"><p>115478, г.Москва, ул. Москворечье, д.1</p></bio><bio xml:lang="en"><p>1, Moskvorechie st., Moscow, 115522, Russian Federation</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>Гумерова</surname><given-names>Л. И.</given-names></name><name name-style="western" xml:lang="en"><surname>Gumerova</surname><given-names>L. I.</given-names></name></name-alternatives><bio xml:lang="ru"><p>115478, г.Москва, ул. Москворечье, д.1</p></bio><bio xml:lang="en"><p>1, Moskvorechie st., Moscow, 115522, Russian Federation</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>Воронина</surname><given-names>Е. С.</given-names></name><name name-style="western" xml:lang="en"><surname>Voronina</surname><given-names>E. S.</given-names></name></name-alternatives><bio xml:lang="ru"><p>115478, г.Москва, ул. Москворечье, д.1</p></bio><bio xml:lang="en"><p>1, Moskvorechie st., Moscow, 115522, Russian Federation</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>Жегло</surname><given-names>Д. Г.</given-names></name><name name-style="western" xml:lang="en"><surname>Zheglo</surname><given-names>D. G.</given-names></name></name-alternatives><bio xml:lang="ru"><p>115478, г.Москва, ул. Москворечье, д.1</p></bio><bio xml:lang="en"><p>1, Moskvorechie st., Moscow, 115522, Russian Federation</p></bio><xref ref-type="aff" rid="aff-1"/></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><pub-date pub-type="collection"><year>2025</year></pub-date><pub-date pub-type="epub"><day>30</day><month>07</month><year>2025</year></pub-date><volume>24</volume><issue>5</issue><fpage>86</fpage><lpage>89</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Кислова А.В., Свиридов Ф.С., Пожитнова В.О., Свиридова В.В., Киселев Д.С., Гумерова Л.И., Воронина Е.С., Жегло Д.Г., 2025</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="ru">Кислова А.В., Свиридов Ф.С., Пожитнова В.О., Свиридова В.В., Киселев Д.С., Гумерова Л.И., Воронина Е.С., Жегло Д.Г.</copyright-holder><copyright-holder xml:lang="en">Kislova A.V., Sviridov F.S., Pozhitnova V.O., Sviridova V.V., Kiselev D.S., Gumerova L.I., Voronina E.S., Zheglo D.G.</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/2992">https://www.medgen-journal.ru/jour/article/view/2992</self-uri><abstract><p>Введение. Индуцированные плюрипотентные стволовые клетки (ИПСК) выступают важной моделью для изучения процессов эмбриогенеза и генетических заболеваний. В то же время для ИПСК характерны повышенный уровень стресса репликации и генетическая нестабильность в митозе. В условиях стресса репликации в хромосомном материале происходят разрывы в участках конститутивных ломких сайтов (кЛС), наблюдаемые на метафазных пластинках. Картирование кЛС в ИПСК помогает лучше понять функциональные последствия стресса репликации для полученных из ИПСК производных, а также механизмы соматического мутагенеза (в том числе в эмбриональном периоде). Текущее исследование продолжает работу по картированию кЛС в ИПСК человека в контексте изучения их генетической стабильности и безопасности.Цель: молекулярное картирование кЛС хромосом в ИПСК методом FISH с зондами, маркирующими границы длинных генов.Методы. ИПСК человека культивировались бесфидерным методом. Индукцию хроматидных разрывов проводили добавлением в среду афидиколина и кофеина. Зонды FISH, специфичные к границам изучаемых генов, были получены с помощью ПЦР длинных фрагментов и ник-трансляции.Результаты. Гены-мишени были выбраны на основе их размера внутри границ хромосомных бэндов, в которых наблюдались хроматидные разрывы при обработке ингибиторами репликации. Флуоресцентные сигналы от зондов FISH, специфичных к границам генов ANKS1B, LRP1B, WWOX, NRXN3, LINGO2, PRKN, регистрировались по разные стороны от хроматидного разрыва, что свидетельствовало о локализации кЛС в пределах гена-мишени.Выводы. Показана репликационная нестабильность в ИПСК для шести клинически значимых генов, которые функционально связаны с онкогенезом и развитием и функционированием нервной ткани. Эти результаты могут прояснить роль стресса репликации при формировании соматического мозаицизма в эмбриогенезе. Также мутации в этих генах могут сказаться на функциональной состоятельности дифференцированных производных ИПСК.</p></abstract><trans-abstract xml:lang="en"><p>Background. Induced pluripotent stem cells (iPSCs) serve as an important model for studying the processes of embryogenesis and genetic diseases. At the same time, iPSCs are characterized by elevated levels of replication stress and genetic instability during mitosis. Under conditions of replication stress, breaks occur in the chromosomal material at constitutive fragile sites (CFS), which are observed on metaphase plates. Mapping CFS in iPSCs helps to better understand the functional consequences of replication stress for the derivatives obtained from iPSCs, as well as the mechanisms underlying somatic mutagenesis (including those occurring during the embryonic period). The current study continues the work on mapping constitutive fragile sites in human induced pluripotent stem cells in the context of investigating their genetic stability and safety.Aim. Molecular mapping of constitutive fragile sites in iPSCs using FISH probes marking the boundaries of long genes.Methods. Human iPSCs were cultured using a feeder-free method. Induction of chromatid breaks was performed by adding aphidicolin and caffeine to the medium. FISH probes specific to the boundaries of the studied genes were obtained using long range PCR and nick translation.Results. The target genes were selected based on their size within the boundaries of the chromosomal bands where chromatid breaks were observed following treatment with replication inhibitors. Fluorescent signals from FISH probes specific to the boundaries of the genes ANKS1B, LRP1B, WWOX, NRXN3, LINGO2, and PRKN were detected on either side of the chromatid break, indicating the localization of the CFS within the target gene.Conclusion. Replication instability has been revealed in iPSCs for six clinically significant genes that are functionally associated with oncogenesis and the development and functioning of nervous tissue. These results may clarify the role of replication stress in the formation of somatic mosaicism during embryogenesis. Additionally, mutations in these genes may affect the functional viability of differentiated derivatives of iPSCs.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>индуцированные плюрипотентные стволовые клетки (ИПСК)</kwd><kwd>стресс репликации</kwd><kwd>ANKS1B</kwd><kwd>LRP1B</kwd><kwd>WWOX</kwd><kwd>NRXN3</kwd><kwd>LINGO2</kwd><kwd>PRKN</kwd></kwd-group><kwd-group xml:lang="en"><kwd>induced pluripotent stem cells (IPSC)</kwd><kwd>replication stress</kwd><kwd>ANKS1B</kwd><kwd>LRP1B</kwd><kwd>WWOX</kwd><kwd>NRXN3</kwd><kwd>LINGO2</kwd><kwd>PRKN</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Работа выполнена в рамках государственного задания Минобрнауки. России для ФГБНУ МГНЦ.</funding-statement><funding-statement xml:lang="en">The study was carried out under the state assignment of the Ministry of Science and Higher Education for the Research Centre for Medical Genetics</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">Ahuja A.K., Jodkowska K., Teloni F., et al. A short G1 phase imposes constitutive replication stress and fork remodelling in mouse embryonic stem cells. Nature Communications 2016 7:1. 2016; 1(7): 1–11. DOI:10.1038/ncomms10660.</mixed-citation><mixed-citation xml:lang="en">Ahuja A.K., Jodkowska K., Teloni F., et al. A short G1 phase imposes constitutive replication stress and fork remodelling in mouse embryonic stem cells. Nature Communications 2016 7:1. 2016; 1(7): 1–11. 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