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<article 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" xmlns:ali="http://www.niso.org/schemas/ali/1.0/" article-type="research-article" dtd-version="1.2" xml:lang="en"><front><journal-meta><journal-id journal-id-type="publisher-id">Russian Journal of Bioorganic Chemistry</journal-id><journal-title-group><journal-title xml:lang="en">Russian Journal of Bioorganic Chemistry</journal-title><trans-title-group xml:lang="ru"><trans-title>Биоорганическая химия</trans-title></trans-title-group></journal-title-group><issn publication-format="print">0132-3423</issn><issn publication-format="electronic">1998-2860</issn><publisher><publisher-name xml:lang="en">The Russian Academy of Sciences</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">683097</article-id><article-id pub-id-type="doi">10.31857/S0132342325010064</article-id><article-id pub-id-type="edn">LZMZHL</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>Articles</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>Статьи</subject></subj-group><subj-group subj-group-type="article-type"><subject>Research Article</subject></subj-group></article-categories><title-group><article-title xml:lang="en">Visualization of h3k9me3 in embryoid bodies using genetically encoded fluorescent sensor MPP8-Green</article-title><trans-title-group xml:lang="ru"><trans-title>Визуализация гистоновой модификации h3k9me3 в эмбриоидных тельцах с помощью генетически кодируемого флуоресцентного сенсора MPP8-Green</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Stepanov</surname><given-names>A. I.</given-names></name><name xml:lang="ru"><surname>Степанов</surname><given-names>А. И.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>gurskayanadya@gmail.com</email><xref ref-type="aff" rid="aff1"/><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Zhigmitova</surname><given-names>E. B.</given-names></name><name xml:lang="ru"><surname>Жигмитова</surname><given-names>Е. Б.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>gurskayanadya@gmail.com</email><xref ref-type="aff" rid="aff3"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Dashinimaev</surname><given-names>E. B.</given-names></name><name xml:lang="ru"><surname>Дашинимаев</surname><given-names>Э. Б.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>gurskayanadya@gmail.com</email><xref ref-type="aff" rid="aff3"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Galiakberova</surname><given-names>A. A.</given-names></name><name xml:lang="ru"><surname>Галиакберова</surname><given-names>А. А.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>gurskayanadya@gmail.com</email><xref ref-type="aff" rid="aff3"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Putlyaeva</surname><given-names>L. V.</given-names></name><name xml:lang="ru"><surname>Путляева</surname><given-names>Л. В.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>gurskayanadya@gmail.com</email><xref ref-type="aff" rid="aff1"/><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Lukyanov</surname><given-names>K. A.</given-names></name><name xml:lang="ru"><surname>Лукьянов</surname><given-names>К. А.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>gurskayanadya@gmail.com</email><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Gurskaya</surname><given-names>N. G.</given-names></name><name xml:lang="ru"><surname>Гурская</surname><given-names>Н. Г.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>gurskayanadya@gmail.com</email><xref ref-type="aff" rid="aff1"/><xref ref-type="aff" rid="aff2"/><xref ref-type="aff" rid="aff3"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Skolkovo Institute of Science and Technology</institution></aff><aff><institution xml:lang="ru">Сколковский институт науки и технологии, Центр молекулярной и клеточной биологии</institution></aff></aff-alternatives><aff-alternatives id="aff2"><aff><institution xml:lang="en">Shemyakin–Ovchinnikov Institute of Bioorganic Chemistry</institution></aff><aff><institution xml:lang="ru">Институт биоорганической химии им. акад. М.М. Шемякина и Ю.А. Овчинникова РАН</institution></aff></aff-alternatives><aff-alternatives id="aff3"><aff><institution xml:lang="en">Pirogov Russian National Research Medical University</institution></aff><aff><institution xml:lang="ru">Российский национальный исследовательский медицинский университет им. Н.И. Пирогова</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2025-02-15" publication-format="electronic"><day>15</day><month>02</month><year>2025</year></pub-date><volume>51</volume><issue>1</issue><issue-title xml:lang="ru"/><fpage>63</fpage><lpage>71</lpage><history><date date-type="received" iso-8601-date="2025-06-05"><day>05</day><month>06</month><year>2025</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2025, Russian Academy of Sciences</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2025, Российская академия наук</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="en">Russian Academy of Sciences</copyright-holder><copyright-holder xml:lang="ru">Российская академия наук</copyright-holder></permissions><self-uri xlink:href="https://journals.eco-vector.com/0132-3423/article/view/683097">https://journals.eco-vector.com/0132-3423/article/view/683097</self-uri><abstract xml:lang="en"><p>Epigenetic histone modifications play a key role in the differentiation of stem cells into various cell types. The ability of induced pluripotent stem cells (iPSCs) to differentiate is assessed using the embryoid body formation method, which is widely used and prevalent in iPSC research. In this study, we utilized a stable line of iPSCs with a genetically encoded sensor MPP8-Green to visualize the histone modification H3K9me3 during embryoid body formation. We identified two groups of cells based on the distribution of H3K9me3 in the formed embryoid bodies, using the MPP8-Green sensor. This study demonstrates that the MPP8-Green sensor can be used to track the dynamics of H3K9me3 during spontaneous differentiation and embryoid body formation. Using the sensor, we identified two groups of cells with different distributions of H3K9me3 and showed the potential application of such genetically encoded tools to reveal differences in patterns of epigenetic modifications during the spontaneous differentiation of iPSCs.</p></abstract><trans-abstract xml:lang="ru"><p>Эпигенетические гистоновые модификации играют ключевую роль в дифференцировке стволовых клеток в различные типы клеток. Способность индуцированных плюрипотентных стволовых клеток (иПСК) к дифференцировке оценивается методом формирования эмбриоидных телец, который широко используется и распространен в исследованиях иПСК. В данной работе мы использовали стабильную линию иПСК с генетически кодируемым сенсором MPP8-Green для визуализации гистоновой модификации H3K9me3 при формировании эмбриоидных телец. Мы выявили две группы клеток на основе распределения H3K9me3 в сформировавшихся эмбриоидных тельцах, используя сенсор MPP8-Green. Данная работа демонстрирует, что сенсор MPP8-Green может быть использован для отслеживания динамики H3K9me3 во время спонтанной дифференцировки и формирования эмбриоидных телец. С использованием сенсора мы выявили две группы клеток с различным распределением H3K9me3 и показали возможность применения подобных генетически кодируемых инструментов для выявления различий в паттернах эпигенетических модификаций при спонтанной дифференцировке иПСК.</p></trans-abstract><kwd-group xml:lang="en"><kwd>iPSC</kwd><kwd>embryoid bodies</kwd><kwd>histones</kwd><kwd>methylation</kwd><kwd>epigenetic regulation</kwd><kwd>fluorescence microscopy</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>иПСК</kwd><kwd>эмбриоидные тельца</kwd><kwd>гистоны</kwd><kwd>метилирование</kwd><kwd>эпигенетическая регуляция</kwd><kwd>флуоресцентная микроскопия</kwd></kwd-group><funding-group><award-group><funding-source><institution-wrap><institution xml:lang="ru">Российский научный фонд</institution></institution-wrap><institution-wrap><institution xml:lang="en">Russian Science Foundation</institution></institution-wrap></funding-source><award-id>22-14-00141</award-id></award-group></funding-group></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Bou Kheir T., Lund A.H. // Essays Biochem. 2010. 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