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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">Acta Naturae</journal-id><journal-title-group><journal-title xml:lang="en">Acta Naturae</journal-title><trans-title-group xml:lang="ru"><trans-title>Acta Naturae</trans-title></trans-title-group></journal-title-group><issn publication-format="print">2075-8251</issn><publisher><publisher-name xml:lang="en">Acta Naturae Ltd</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">11675</article-id><article-id pub-id-type="doi">10.32607/actanaturae.11675</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>Research Articles</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>Экспериментальные 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">Ras Participates in the Regulation of the Stability of Adenoviral Protein E1A via MAP-kinase ERK</article-title><trans-title-group xml:lang="ru"><trans-title>Ras участвует в регуляции стабильности аденовирусного белка Е1А через MAP-киназу ERK</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Morshneva</surname><given-names>Alisa V.</given-names></name><name xml:lang="ru"><surname>Моршнева</surname><given-names>Алиса Васильевна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>1195alisa@gmail.com</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Gnedina</surname><given-names>Olga O.</given-names></name><name xml:lang="ru"><surname>Гнедина</surname><given-names>Ольга Олеговна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>1195alisa@gmail.com</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Kindt</surname><given-names>Daria N.</given-names></name><name xml:lang="ru"><surname>Киндт</surname><given-names>Дарья Николаевна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>1195alisa@gmail.com</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Igotti</surname><given-names>Maria V.</given-names></name><name xml:lang="ru"><surname>Иготти</surname><given-names>Мария Вячеславовна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>1195alisa@gmail.com</email><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Institute of Cytology, Russian Academy of Sciences</institution></aff><aff><institution xml:lang="ru">Институт цитологии РАН</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2022-07-21" publication-format="electronic"><day>21</day><month>07</month><year>2022</year></pub-date><volume>14</volume><issue>2</issue><issue-title xml:lang="en"/><issue-title xml:lang="ru"/><fpage>78</fpage><lpage>84</lpage><history><date date-type="received" iso-8601-date="2021-12-30"><day>30</day><month>12</month><year>2021</year></date><date date-type="accepted" iso-8601-date="2022-03-18"><day>18</day><month>03</month><year>2022</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2022, Morshneva A.V., Gnedina O.O., Kindt D.N., Igotti M.V.</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2022, Моршнева А.В., Гнедина О.О., Киндт Д.Н., Иготти М.В.</copyright-statement><copyright-year>2022</copyright-year><copyright-holder xml:lang="en">Morshneva A.V., Gnedina O.O., Kindt D.N., Igotti M.V.</copyright-holder><copyright-holder xml:lang="ru">Моршнева А.В., Гнедина О.О., Киндт Д.Н., Иготти М.В.</copyright-holder><ali:free_to_read xmlns:ali="http://www.niso.org/schemas/ali/1.0/"/><license><ali:license_ref xmlns:ali="http://www.niso.org/schemas/ali/1.0/">https://creativecommons.org/licenses/by/4.0</ali:license_ref></license></permissions><self-uri xlink:href="https://actanaturae.ru/2075-8251/article/view/11675">https://actanaturae.ru/2075-8251/article/view/11675</self-uri><abstract xml:lang="en"><p>The E1A adenoviral protein required for the initiation of the viral life cycle is being actively studied as a sensitizing agent in the combination therapy of cancer, and tumors with activated Ras in particular. We investigated the role played by the Ras signaling pathway in the regulation of E1A protein stability and showed that overexpression of activated Ras increases the basal level of E1A, but enhances the degradation of the E1A protein under treatment with histone deacetylase inhibitors (HDIs). It has been found that the MAP kinase ERK is the key factor in E1A stabilization, and ERK inactivation upon HDI treatment reduces the E1A protein level. Our results indicate that the combination treatment of tumors with activated Ras using adenoviral E1A and HDI has limitations attributed to intense HDI-dependent degradation of E1A. Nevertheless, the established contribution of ERK kinase to the regulation of E1A stability can be used to search for new effective drug combinations based on the adenoviral E1A protein.</p></abstract><trans-abstract xml:lang="ru"><p>Аденовирусный белок Е1А, необходимый для реализации жизненного цикла вируса, активно изучается в связи с его возможным применением в качестве сенсибилизирующего агента в комбинированной терапии рака, в частности опухолей с активированным Ras. Мы изучили роль сигнального пути Ras в регуляции стабильности E1A и показали, что при сверхэкспрессии активированного Ras в E1A-экспрессирующих клетках увеличивается содержание E1A и при этом усиливается его деградация при действии ингибиторов гистоновых деацетилаз (ИГД). Установлено, что ключевым фактором стабилизации E1A является MAP-киназа ERK, которая инактивируется при действии ИГД, что приводит к деградации белка E1A. Полученные результаты указывают на то, что возможности применения аденовирусного E1A и ингибиторов деацетилаз гистонов в комбинированной терапии опухолей с активированным Ras ограничены ввиду интенсивной ИГД-зависимой деградации E1A. Тем не менее участие MAP-киназы ERK в регуляции стабильности E1A может быть использовано для подбора эффективных комбинаций препаратов на основе аденовирусного белка E1A.</p></trans-abstract><kwd-group xml:lang="en"><kwd>molecular oncology</kwd><kwd>Ras</kwd><kwd>E1A</kwd><kwd>combination therapy</kwd><kwd>histone deacetylase inhibitors</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>молекулярная онкология</kwd><kwd>Ras</kwd><kwd>E1A</kwd><kwd>комбинированная терапия</kwd><kwd>ингибиторы деацетилаз гистонов</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>22-25-20229</award-id></award-group><award-group><funding-source><institution-wrap><institution xml:lang="ru">Фонд директора Института цитологии РАН</institution></institution-wrap><institution-wrap><institution xml:lang="en">Fund of the Director of the Institute of Cytology, Russian Academy of Sciences</institution></institution-wrap></funding-source></award-group><award-group><funding-source><institution-wrap><institution xml:lang="ru">Минобрнауки Российской Федерации</institution></institution-wrap><institution-wrap><institution xml:lang="en">Ministry of Science and Higher Education of the Russian Federation</institution></institution-wrap></funding-source><award-id>075-15-2021-683</award-id></award-group></funding-group></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Berk A.J. // Cancer Surv. 1986. 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