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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">phkinetica</journal-id><journal-title-group><journal-title xml:lang="ru">Фармакокинетика и Фармакодинамика</journal-title><trans-title-group xml:lang="en"><trans-title>Pharmacokinetics and Pharmacodynamics</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2587-7836</issn><issn pub-type="epub">2686-8830</issn><publisher><publisher-name>ООО «Издательство ОКИ»</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.24411/2587-7836-2018-10020.</article-id><article-id custom-type="elpub" pub-id-type="custom">phkinetica-66</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>МЕХАНИЗМ ДЕЙСТВИЯ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>MECHANISM OF ACTION</subject></subj-group></article-categories><title-group><article-title>Метаболит афобазола М-11 ингибирует хинон-редуктазу-2</article-title><trans-title-group xml:lang="en"><trans-title>Afobazole metabolite M-11 inhibits quinone reductase 2</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>Кадников</surname><given-names>Илья Андреевич</given-names></name><name name-style="western" xml:lang="en"><surname>Kadnikov</surname><given-names>I. A.</given-names></name></name-alternatives><email xlink:type="simple">ikadnikov@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>Воронин</surname><given-names>Михаил Владимирович</given-names></name><name name-style="western" xml:lang="en"><surname>Voronin</surname><given-names>M. V.</given-names></name></name-alternatives><email xlink:type="simple">noemail@neicon.ru</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>Середенин</surname><given-names>Сергей Борисович</given-names></name><name name-style="western" xml:lang="en"><surname>Seredenin</surname><given-names>S. B.</given-names></name></name-alternatives><email xlink:type="simple">noemail@neicon.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>ФГБНУ «НИИ фармакологии имени В.В. Закусова»</institution><country>Россия</country></aff><aff xml:lang="en"><institution>FSBI «Zakusov institute of Pharmacology»</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2018</year></pub-date><pub-date pub-type="epub"><day>06</day><month>10</month><year>2019</year></pub-date><volume>0</volume><issue>3</issue><fpage>27</fpage><lpage>30</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Кадников И.А., Воронин М.В., Середенин С.Б., 2019</copyright-statement><copyright-year>2019</copyright-year><copyright-holder xml:lang="ru">Кадников И.А., Воронин М.В., Середенин С.Б.</copyright-holder><copyright-holder xml:lang="en">Kadnikov I.A., Voronin M.V., Seredenin S.B.</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.pharmacokinetica.ru/jour/article/view/66">https://www.pharmacokinetica.ru/jour/article/view/66</self-uri><abstract><p>Актуальность. Ингибирование хинон-редуктазы-2 (NQO2) является перспективным для достижения нейропротекторного действия. Анксиолитик афобазол (5-этокси-2-[2-(морфолино)-этилтио] бензимидазола дигидрохлорид) и его метаболит М-11 (2-[2-(3-оксоморфолин-4-ил)-этилтио]-5-этоксибензимидазола гидрохлорид) взаимодействуют с регуляторным мелатонин-зависимым сайтом NQO2. Ранее нами показано, что афобазол ингибирует фермент. Влияние М-11 на NQO2 не изучено. Цель. Изучить действие метаболита афобазола М-11 на активность NQO2. Методы. Влияние М-11 на активность человеческого рекомбинантного фермента хинон-редуктаза-2 (hNQO2) исследовали методом флуоресцентной спектроскопии. Результаты. Установлено, что М-11 ингибирует hNQO2 в концентрациях 0,5 и 1,0 мМ, снижая скорость реакции на 12 и 24 % соответственно. В этих же концентрациях соединение М-11 уступает действию афобазола. Заключение. Соединение М-11 ингибирует NQO2 и может использоваться для изучения фармакологических эффектов афобазола, обусловленных взаимодействием с регуляторным сайтом фермента.</p></abstract><trans-abstract xml:lang="en"><p>Resume. Objective. Inhibition of quinone reductase 2 (NQO2) is a perspective target to achieve neuroprotective effect. Anxiolytic drug afobazole (5-Ethoxy-2-[2-(morpholino)-ethylthio]benzimidazole dihidrochloride) and its main metabolite M-11 (2-[2-(3-oxomorpholin-4-il)-ethylthio]-5-ethoxybenzimidazole hydrochloride) can interact with melatonin dependent regulatory site of NQO2. Previously we have figured that afobazole inhibits NQO2. However, the role of interaction between M-11 and NQO2 is unclear. Aim. To study the effect of M-11 on activity of NQO2. Methods. The influence of M-11 on activity of human recombinant NQO2 (hNQO2) was measured utilizing fluorescent spectroscopy. Results. M-11 inhibits hNQO2 in concentrations of 0.5 and 1.0 mM, decreasing enzymatic reaction velocity on 12 and 24 % respectively. In same concentrations, M-11 is inferior to afobazole. Conclusion. Compound M-11 inhibits NQO2 and can be used to study pharmacological effects of afobazole caused by interaction with regulatory site of enzyme.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>метаболит афобазола</kwd><kwd>хинон-редуктаза-2</kwd><kwd>МТ3-рецептор</kwd><kwd>afobazole metabolite</kwd><kwd>NQO2</kwd><kwd>MT3 receptor</kwd></kwd-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Iskander K., Li J., Han S., et al. NQO1 and NQO2 regulation of humoral immunity and autoimmunity. J. Biol Chem. 2006;281(41):30917-30924. DOI: 10.1074/jbc.M605809200</mixed-citation><mixed-citation xml:lang="en">Iskander K., Li J., Han S., et al. 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