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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">10452</article-id><article-id pub-id-type="doi">10.32607/20758251-2016-8-2-108-115</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">Inhibition of Poly(ADP-Ribose) Polymerase by Nucleic Acid Metabolite 7-Methylguanine</article-title><trans-title-group xml:lang="ru"><trans-title>Ингибирование поли(ADP-рибозо)- полимеразы метаболитом нуклеиновых кислот 7-метилгуанином</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Nilov</surname><given-names>D. K.</given-names></name><name xml:lang="ru"><surname>Нилов</surname><given-names>Д. К.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>vytas@belozersky.msu.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Tararov</surname><given-names>V. I.</given-names></name><name xml:lang="ru"><surname>Тараров</surname><given-names>В. И.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>vytas@belozersky.msu.ru</email><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Kulikov</surname><given-names>A. V.</given-names></name><name xml:lang="ru"><surname>Куликов</surname><given-names>A. В.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>vytas@belozersky.msu.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Zakharenko</surname><given-names>A. L.</given-names></name><name xml:lang="ru"><surname>Захаренко</surname><given-names>A. Л.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>vytas@belozersky.msu.ru</email><xref ref-type="aff" rid="aff3"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Gushchina</surname><given-names>I. V.</given-names></name><name xml:lang="ru"><surname>Гущина</surname><given-names>И. В.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>vytas@belozersky.msu.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Mikhailov</surname><given-names>S. N.</given-names></name><name xml:lang="ru"><surname>Михайлов</surname><given-names>С. Н.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>vytas@belozersky.msu.ru</email><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Lavrik</surname><given-names>O. I.</given-names></name><name xml:lang="ru"><surname>Лаврик</surname><given-names>O. И.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>vytas@belozersky.msu.ru</email><xref ref-type="aff" rid="aff3"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Švedas</surname><given-names>V. K.</given-names></name><name xml:lang="ru"><surname>Швядас</surname><given-names>В. K.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>vytas@belozersky.msu.ru</email><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Lomonosov Moscow State University</institution></aff><aff><institution xml:lang="ru">Московский государственный университет им. М.В. Ломоносова</institution></aff></aff-alternatives><aff-alternatives id="aff2"><aff><institution xml:lang="en">Engelhardt Institute of Molecular Biology, Russian Academy of Sciences</institution></aff><aff><institution xml:lang="ru">Институт молекулярной биологии им. В.А. Энгельгардта РАН</institution></aff></aff-alternatives><aff-alternatives id="aff3"><aff><institution xml:lang="en">Institute of Chemical Biology and Fundamental Medicine, Russian Academy of Sciences, Siberian Branch</institution></aff><aff><institution xml:lang="ru">Институт химической биологии и фундаментальной медицины Сибирского отделения РАН</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2016-06-15" publication-format="electronic"><day>15</day><month>06</month><year>2016</year></pub-date><volume>8</volume><issue>2</issue><issue-title xml:lang="en">VOL 8, NO2 (2016)</issue-title><issue-title xml:lang="ru">ТОМ 8, №2 (2016)</issue-title><fpage>108</fpage><lpage>115</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 ©; 2016, Nilov D.K., Tararov V.I., Kulikov A.V., Zakharenko A.L., Gushchina I.V., Mikhailov S.N., Lavrik O.I., Švedas V.K.</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2016, Нилов Д.К., Тараров В.И., Куликов A.В., Захаренко A.Л., Гущина И.В., Михайлов С.Н., Лаврик O.И., Швядас В.K.</copyright-statement><copyright-year>2016</copyright-year><copyright-holder xml:lang="en">Nilov D.K., Tararov V.I., Kulikov A.V., Zakharenko A.L., Gushchina I.V., Mikhailov S.N., Lavrik O.I., Švedas V.K.</copyright-holder><copyright-holder xml:lang="ru">Нилов Д.К., Тараров В.И., Куликов A.В., Захаренко A.Л., Гущина И.В., Михайлов С.Н., Лаврик O.И., Швядас В.K.</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/10452">https://actanaturae.ru/2075-8251/article/view/10452</self-uri><abstract xml:lang="en"><p>The ability of 7-methylguanine, a nucleic acid metabolite, to inhibit poly (ADP-ribose) polymerase-1 (PARP-1) and poly(ADP-ribose)polymerase-2 (PARP-2) has been identified in silico and studied experimentally.The amino group at position 2 and the methyl group at position 7 were shown to be important substituents for the efficient binding of purine derivatives to PARPs. The activity of both tested enzymes, PARP-1 and PARP-2, was suppressed by 7-methylguanine with IC50 values of 150 and 50 μM, respectively. At the PARP inhibitory concentration, 7-methylguanine itself was not cytotoxic, but it was able to accelerate apoptotic death of BRCA1-deficient breast cancer cells induced by cisplatin and doxorubicin, the widely used DNA-damaging chemotherapeutic agents. 7-Methylguanine possesses attractive predictable pharmacokinetics and an adverse-effect profile and may be considered as a new additive to chemotherapeutic treatment.</p></abstract><trans-abstract xml:lang="ru"><p>Способность метаболита нуклеиновых кислот 7-метилгуанина ингибировать поли(ADP-рибозо)полимеразу 1 (ПАРП-1) и поли(ADP-рибозо)полимеразу 2 (ПАРП-2) выявлена in silico и изучена экспериментально. Показано, что для эффективного связывания пуриновых производных с ПАРП важна аминогруппа в положении 2 и метильная группа в положении 7. Активность ПАРП-1 и ПАРП-2 подавляется 7-метилгуанином со значениями IC50 150 и 50 мкМ соответственно. В ПАРП-ингибирующей концентрации 7-метилгуанин не токсичен, но способен усиливать апоптотическую гибель BRCA1-дефицитных клеток рака молочной железы под воздействием цисплатина и доксорубицина - широко используемых ДНК- повреждающих химиотерапевтических препаратов. 7-Метилгуанин имеет привлекательный предсказанный профиль фармакокинетики и токсичности и может рассматриваться в качестве дополнительного компонента химиотерапии.</p></trans-abstract><kwd-group xml:lang="en"><kwd>PARP inhibitors</kwd><kwd>molecular modeling</kwd><kwd>docking</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>докинг</kwd><kwd>ингибиторы ПАРП</kwd><kwd>молекулярное моделирование</kwd></kwd-group><funding-group><funding-statement xml:lang="en">This work was supported by the Russian Ministry of Education and Science (State agreement No. 14.604.21.0018, ID RFMEFI60414X0018). The chemical synthesis of purines was supported by the Russian Foundation for Basic Research (grant 14-04-00835_a).</funding-statement><funding-statement xml:lang="ru">Работа поддержана Министерством образования и науки России (соглашение № 14.604.21.0018, ID RFMEFI60414X0018). Химический синтез пуринов выполнен при поддержке РФФИ (грант № 14-04-00835_а).</funding-statement></funding-group></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>[1] Cline S.D., Hanawalt P.C. // Nat. Rev. Mol. Cell Biol. 2003, V.4, P.361-373</mixed-citation></ref><ref id="B2"><label>2.</label><mixed-citation>[2] Drenichev M.S., Mikhailov S.N. // Nucleosides Nucleotides Nucleic Acids. 2015, V.34, P.258-276</mixed-citation></ref><ref id="B3"><label>3.</label><mixed-citation>[3] Lautier D., Lagueux J., Thibodeau J., Ménard L., Poirier G.G. // Mol. Cell. 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