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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">10505</article-id><article-id pub-id-type="doi">10.32607/20758251-2015-7-3-133-139</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">Apigenin Inhibits Growth of Breast Cancer Cells: The Role of ERα and HER2/neu</article-title><trans-title-group xml:lang="ru"><trans-title>Апигенин ингибирует рост клеток рака молочной железы: роль ERα и HER2/neu</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Scherbakov</surname><given-names>A. M.</given-names></name><name xml:lang="ru"><surname>Щербаков</surname><given-names>A. M.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>alex.scherbakov@gmail.com</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Andreeva</surname><given-names>O. E.</given-names></name><name xml:lang="ru"><surname>Андреева</surname><given-names>O. E.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>alex.scherbakov@gmail.com</email><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Blokhin N. N. Russian Cancer Research Center</institution></aff><aff><institution xml:lang="ru">Российский онкологический научный центр им. Н.Н. Блохина</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2015-09-15" publication-format="electronic"><day>15</day><month>09</month><year>2015</year></pub-date><volume>7</volume><issue>3</issue><issue-title xml:lang="en">VOL 7, NO3 (2015)</issue-title><issue-title xml:lang="ru">ТОМ 7, №3 (2015)</issue-title><fpage>133</fpage><lpage>139</lpage><history><date date-type="received" iso-8601-date="2020-01-17"><day>17</day><month>01</month><year>2020</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2015, Scherbakov A.M., Andreeva O.E.</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2015, Щербаков A.M., Андреева O.E.</copyright-statement><copyright-year>2015</copyright-year><copyright-holder xml:lang="en">Scherbakov A.M., Andreeva O.E.</copyright-holder><copyright-holder xml:lang="ru">Щербаков A.M., Андреева O.E.</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/10505">https://actanaturae.ru/2075-8251/article/view/10505</self-uri><abstract xml:lang="en"><p>Phytoestrogens are a group of plant-derived compounds with an estrogen-like activity. In mammalians, phytoestrogens bind to the estrogen receptor (ER) and participate in the regulation of cell growth and gene transcription. There are several reports of the cytotoxic effects of phytoestrogens in different cancer cell lines. The aim of this study was to measure the phytoestrogen activity against breast cancer cells with different levels of ER expression and to elucidate the molecular pathways regulated by the leader compound. Methods used in the study include immunoblotting, transfection with a luciferase reporter vector, and a MTT test. We demonstrated the absence of a significant difference between ER+ and ER- breast cancer cell lines in their response to cytotoxic stimuli: treatment with high doses of phytoestrogens (apigenin, genistein, quercetin, naringenin) had the same efficiency in ER-positive and ER-negative cells. Incubation of breast cancer cells with apigenin revealed the highest cytotoxicity of this compound; on the contrary, naringenin treatment resulted in a low cytotoxic activity. It was shown that high doses of apigenin (50 μМ) do not display estrogen-like activity and can suppress ER activation by 17β-estradiol. Cultivation of HER2-positive breast cancer SKBR3 cells in the presence of apigenin resulted in a decrease in HER2/neu expression, accompanied by cleavage of an apoptosis substrate PARP. Therefore, the cytotoxic effects of phytoestrogens are not associated with the steroid receptors of breast cancer cells. Apigenin was found to be the most effective phytoestrogen that strongly inhibits the growth of breast cancer cells, including HER2-positive ones.</p></abstract><trans-abstract xml:lang="ru"><p>Фитоэстрогены - соединения растительного происхождения, обладающие эстрогеноподобной активностью. В организме млекопитающих фитоэстрогены связываются с рецепторами эстрогенов (ER) и участвуют в регуляции роста клеток и транскрипции генов. Некоторые фитоэстрогены могут оказывать цитотоксическое и антипролиферативное воздействие на опухолевые клетки. Изучено действие представителей основных групп фитоэстрогенов на клетки рака молочной железы с различным рецепторным статусом, проанализированы молекулярные пути, отвечающие за реализацию антипролиферативного эффекта лидерного соединения. Антипролиферативный эффект высоких доз фитоэстрогенов (апигенина, генистеина, кверцетина, нарингенина) не зависел от статуса рецепторов стероидных гормонов в клетках рака молочной железы. Соединения этого класса проявили сходную эффективность в ER-положительной и ER-отрицательной модели. Наибольшая антипролиферативная активность обнаружена при инкубации клеток рака молочной железы с апигенином, наименьшая - с нарингенином. Апигенин в высоких дозах (50 мкМ) ингибировал активность рецепторов эстрогенов, индуцированную 17β-эстрадиолом, и не проявлял эстрогеноподобную активность. Культивирование HER2-положительных клеток линии SKBR3 с апигенином приводит к снижению экспрессии HER2/neu с параллельной деградацией последнего субстрата каспаз - белка PARP. Таким образом, антипролиферативные эффекты высоких доз фитоэстрогенов в клетках рака молочной железы не зависят от рецепторов стероидных гормонов. Среди изученных соединений наиболее перспективным в качестве противоопухолевого средства является апигенин, значительно ингибирующий пролиферацию и вызывающий гибель клеток рака молочной железы, в том числе HER2-положительных.</p></trans-abstract><kwd-group xml:lang="en"><kwd>breast cancer</kwd><kwd>phytoestrogens</kwd><kwd>estrogen receptor</kwd><kwd>HER2/neu</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>рак молочной железы</kwd><kwd>рецепторы эстрогенов</kwd><kwd>фитоэстрогены</kwd><kwd>HER2/n</kwd></kwd-group><funding-group><funding-statement xml:lang="en">This work was funded by grants from the Russian Science Foundation (No. 14-15-00362, experiments in section #2) and the Russian Foundation for Basic Research (№ 15-04-02172, experiments in sections 1 and 3).</funding-statement><funding-statement xml:lang="ru">Работа финансировалась из средств грантов РНФ (№ 14-15-00362, эксперименты раздела № 2) и РФФИ (№ 15-04-02172, эксперименты разделов № 1 и 3).</funding-statement></funding-group></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>[1] Merabishvili V.M. // Voprosy Onkologii. 2013, V.59, №3, P.314-319</mixed-citation></ref><ref id="B2"><label>2.</label><mixed-citation>[2] DeSantis C.E., Lin C.C., Mariotto A.B., Siegel R.L., Stein K.D., Kramer J.L., Alteri R., Robbins A.S., Jemal A. // CA Cancer J. 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