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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 Physiology</journal-id><journal-title-group><journal-title xml:lang="en">Russian Journal of Physiology</journal-title><trans-title-group xml:lang="ru"><trans-title>Российский физиологический журнал им. И.М. Сеченова</trans-title></trans-title-group></journal-title-group><issn publication-format="print">0869-8139</issn><issn publication-format="electronic">2658-655X</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">679315</article-id><article-id pub-id-type="doi">10.31857/S0869813925020126</article-id><article-id pub-id-type="edn">UIECBE</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>EXPERIMENTAL 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">Search for Inhibitors of Ionotropic Glutamate Receptors in a Series of 2,3,4,5-tetrahydro[1,3]diazepino[1,2-a]benzimidazole Derivatives</article-title><trans-title-group xml:lang="ru"><trans-title>Поиск ингибиторов ионотропных глутаматных рецепторов в ряду производных 2,3,4,5-тетрагидро[1,3]диазепино[1,2-а]бензимидазола</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Dron</surname><given-names>M. Yu.</given-names></name><name xml:lang="ru"><surname>Дронь</surname><given-names>М. Ю.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>neuro.mike@yahoo.com</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Maltsev</surname><given-names>D. V.</given-names></name><name xml:lang="ru"><surname>Мальцев</surname><given-names>Д. В.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>neuro.mike@yahoo.com</email><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Spasov</surname><given-names>A. A.</given-names></name><name xml:lang="ru"><surname>Спасов</surname><given-names>А. А.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>neuro.mike@yahoo.com</email><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Divaeva</surname><given-names>L. N.</given-names></name><name xml:lang="ru"><surname>Диваева</surname><given-names>Л. Н.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>neuro.mike@yahoo.com</email><xref ref-type="aff" rid="aff3"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Sochnev</surname><given-names>V. S.</given-names></name><name xml:lang="ru"><surname>Сочнев</surname><given-names>В. С.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>neuro.mike@yahoo.com</email><xref ref-type="aff" rid="aff3"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Morkovnik</surname><given-names>A. S.</given-names></name><name xml:lang="ru"><surname>Морковник</surname><given-names>А. С.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>neuro.mike@yahoo.com</email><xref ref-type="aff" rid="aff3"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Barygin</surname><given-names>O. I.</given-names></name><name xml:lang="ru"><surname>Барыгин</surname><given-names>О. И.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>neuro.mike@yahoo.com</email><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Sechenov Institute of Evolutionary Physiology and Biochemistry of the RAS</institution></aff><aff><institution xml:lang="ru">Институт эволюционной физиологии и биохимии им. И.М. Сеченова РАН</institution></aff></aff-alternatives><aff-alternatives id="aff2"><aff><institution xml:lang="en">Volgograd State Medical University</institution></aff><aff><institution xml:lang="ru">Волгоградский государственный медицинский университет</institution></aff></aff-alternatives><aff-alternatives id="aff3"><aff><institution xml:lang="en">Southern Federal University</institution></aff><aff><institution xml:lang="ru">Южный федеральный университет</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2025-02-16" publication-format="electronic"><day>16</day><month>02</month><year>2025</year></pub-date><volume>111</volume><issue>2</issue><issue-title xml:lang="ru"/><fpage>365</fpage><lpage>376</lpage><history><date date-type="received" iso-8601-date="2025-05-09"><day>09</day><month>05</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://transsyst.ru/0869-8139/article/view/679315">https://transsyst.ru/0869-8139/article/view/679315</self-uri><abstract xml:lang="en"><p>In the present work, 14 new diazepinebenzimidazole derivatives (DAB series) were screened for inhibitory activity against NMDA- and Ca<sup>2+-</sup>impermeable (CI) AMPA-receptors. Experiments were conducted on isolated Wistar rat neurons; pyramidal neurons of the CA1 zone of the hippocampus were used to study NMDA- and CI-AMPA-receptors. Cell isolation was performed by vibrodissociation, and currents were recorded by whole-cell patch-clamp method. All the studied compounds at a concentration of 100 μM inhibited NMDA-receptors (≥30%), while CI-AMPA receptors currents were inhibited by only four compounds: DAB-8, DAB-12, DAB-19, and DAB-32. DAB-8, DAB-12 and DAB-32 have a 4-substituted phenacyl group at the nitrogen atom N<sup>11</sup> with an electronegative fluorine atom in the para position (DAB-8 and DAB-32) or without it (DAB-12), whereas the most active compound DAB-19 has a 4-tert-butyl-benzyl group at atom N<sup>11</sup> with a bulky tert-butyl substituent in the para position. The most active of them were DAB-12, DAB-19, and DAB-32, which were studied further for their IC<sub>50</sub> values. Compound DAB-19 demonstrated the most pronounced activity against both NMDA- and CI-AMPA-receptors: IC<sub>50 </sub>values were 11,0 ± 1,6 µM and 15,4 ± 1,4 µM, respectively. Such an ability to inhibit both NMDA- and CI-AMPA-receptors at such concentrations is quite remarkable. Based on previous data on the neuropsychotropic effects of DAB-19, we put forward hypothesis about its possible anticonvulsant activity, which was confirmed in the "Pentylenetetrazol Seizure" test. The identification of DAB-19 as a combined antagonist of NMDA- and CI-AMPA-receptors is an important achievement for the further development of effective anticonvulsants.</p></abstract><trans-abstract xml:lang="ru"><p>В настоящей работе выполнен скрининг 14 новых производных диазепинобензимидазола (соединения серии ДАБ) на ингибирующую активность в отношении NMDA- и Ca<sup>2+</sup>-непроницаемых(КН) AMPA-рецепторов. Эксперименты проводились на изолированных нейронах головного мозга крыс линии Вистар, для исследования NMDA- и КН-AMPA-рецепторов использовались пирамидные нейроны зоны CA1 гиппокампа. Изоляция клеток осуществлялась методом вибродиссоциации, а регистрация токов – методом фиксации потенциала в конфигурации «целая клетка». Все исследованные соединения при концентрации 100 μМ ингибировали NMDA-рецепторы (≥30%), в то время как токи КН-AMPA-рецепторов ингибировались только четырьмя соединениями: ДАБ-8, ДАБ-12, ДАБ-19 и ДАБ-32. ДАБ-8, ДАБ-12 и ДАБ-32 имеют у атома азота N<sup>11</sup> 4-замещенную фенацильную группу с электроотрицательным атомом фтора в пара-положении (ДАБ-8 и ДАБ-32), или без него (ДАБ-12), тогда как у наиболее активного соединения ДАБ-19 у атома азота N<sup>11</sup> находится 4-трет-бутил-бензильная группа с объемным трет-бутильным заместителем в пара-положении. Наиболее активными из них оказались ДАБ-12, ДАБ-19 и ДАБ-32, выбранные для дальнейшего изучения их концентрационных зависимостей. Соединение ДАБ-19 продемонстрировало наиболее выраженную активность и к NMDA-, и к КН-AMPA-рецепторам; ИК<sub>50</sub> составили 11.0 ± 1.6 µM и 15.4 ± 1.4 µM соответственно. Подобная способность ингибировать и NMDA-, и КН-AMPA-рецепторы в таких концентрациях является крайне необычной. На основе предыдущих данных о нейропсихотропных эффектах ДАБ-19 была выдвинута гипотеза о его возможной противосудорожной активности, что было подтверждено в тесте «Пентилен-тетразол индуцированных судорог». Выявление ДАБ-19 как комбинированного антагониста NMDA- и КН-AMPA-рецепторов представляет собой важное достижение для дальнейшей разработки эффективных противосудорожных препаратов.</p></trans-abstract><kwd-group xml:lang="en"><kwd>NMDA receptors</kwd><kwd>AMPA receptors</kwd><kwd>patch clamp</kwd><kwd>diazepinebenzimidazoles</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>NMDA-рецепторы</kwd><kwd>AMPA-рецепторы</kwd><kwd>пэтч-кламп</kwd><kwd>диазепинобензимидазолы</kwd></kwd-group><funding-group><award-group><funding-source><institution-wrap><institution xml:lang="ru">Министерство науки и высшего образования 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>075-15-2022-296</award-id></award-group></funding-group></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Collingridge G, Singer W (1990) Excitatory amino acid receptors and synaptic plasticity. 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