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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="en"><front><journal-meta><journal-id journal-id-type="publisher-id">epilepsia</journal-id><journal-title-group><journal-title xml:lang="en">Epilepsy and paroxysmal conditions</journal-title><trans-title-group xml:lang="ru"><trans-title>Эпилепсия и пароксизмальные состояния</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2077-8333</issn><issn pub-type="epub">2311-4088</issn><publisher><publisher-name>IRBIS LLC</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.17749/2077-8333.2019.11.4.357-363</article-id><article-id custom-type="elpub" pub-id-type="custom">epilepsia-501</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="en"><subject>ORIGINAL ARTICLES</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="ru"><subject>ОРИГИНАЛЬНЫЕ СТАТЬИ</subject></subj-group></article-categories><title-group><article-title>Study on the antiepyleptic activity of the new amide derivative of valproic acid and 1,3,4-thiadiazole</article-title><trans-title-group xml:lang="ru"><trans-title>Исследование противоэпилептической активности нового амидного производного вальпроевой кислоты и 1,3,4-тиадиазола</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-1955-5105</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Малыгин</surname><given-names>А. C.</given-names></name><name name-style="western" xml:lang="en"><surname>Malygin</surname><given-names>A. S.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Малыгин Александр Сергеевич – ординатор кафедры фармакологии, клинической фармакологии</p></bio><bio xml:lang="en"><p>Alexander S. Malygin – MD, Resident-in-Training, Department of Pharmacology &amp; Clinical Pharmacology</p></bio><email xlink:type="simple">dr.a.s.m@yandex.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Федеральное государственное бюджетное образовательное учреждение высшего образования «Тверской государственный медицинский университет» Министерства здравоохранения Российской Федерации</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Tver State Medical University</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2019</year></pub-date><pub-date pub-type="epub"><day>11</day><month>01</month><year>2020</year></pub-date><volume>11</volume><issue>4</issue><fpage>357</fpage><lpage>363</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Malygin A.S., 2020</copyright-statement><copyright-year>2020</copyright-year><copyright-holder xml:lang="ru">Малыгин А.C.</copyright-holder><copyright-holder xml:lang="en">Malygin A.S.</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.epilepsia.su/jour/article/view/501">https://www.epilepsia.su/jour/article/view/501</self-uri><abstract><p>Aim – experimental evaluation of the antiepileptic activity of a new amide derivative of valproic acid and 1,3,4-thiadiazole.</p><sec><title>Materials and Methods</title><p>Materials and Methods: The antiepileptic activity of valprazolamide (N- (5-ethyl-1,3,4-thiadiazol-2-yl) -2-propylpentanamide) was tested in mice using the model of maximal electroshock and also the antagonism model with pentylenetetrazole. Neurotoxicity was assessed with the rotating rod test and the probit analysis. The therapeutic and protective index and the ED50 values were calculated for each experimental model of epilepsy.</p></sec><sec><title>Results</title><p>Results: The ED50 values of valprazolamide (intraperitoneally) in mice with seizures induced by pentylenetetrazole or maximal electroshock were 74.5 (46.8-106.4) mg/kg or 138.4 (97.2-197.2) mg/kg, respectively.</p></sec><sec><title>Conclusion</title><p>Conclusion: The new amide derivative of valproic acid and 1,3,4-thiadiazole (valprazolamide) has an antiepileptic activity.</p><p>The author declares no financial support or conflict of interest with respect to this publication.</p></sec></abstract><trans-abstract xml:lang="ru"><p>Цель – экспериментальная оценка противоэпилептической активности нового амидного производного вальпроевой кислоты и 1,3,4-тиадиазола.</p><sec><title>Материалы и методы</title><p>Материалы и методы. Исследование противоэпилептической активности вальпразоламида (N-(5-этил-1,3,4-тиадиазол-2-ил)-2-пропилпентанамид) проводили в экспериментах на мышах с использованием моделей максимального электрошока и антагонизма с пентилентетразолом. Нейротоксичность определяли в тесте вращающегося стержня методом пробит-анализа. Для каждой экспериментальной модели эпилепсии рассчитывали значения ED50, терапевтического и протективного индексов.</p></sec><sec><title>Результаты</title><p>Результаты. Значения ЕD50 вальпразоламида (внутрибрюшинно) для мышей при судорогах, индуцированных пентилентетразолом и максимальным электрошоком составили соответственно 74,5 (46,8-106,4) мг/кг и 138,4 (97,2-197,2) мг/кг.</p></sec><sec><title>Заключение</title><p>Заключение. Новое амидное производное вальпроевой кислоты и 1,3,4-тиадиазола (вальпразоламид) обладает выраженной противоэпилептической активностью.</p><p>Автор заявляет об отсутствии необходимости раскрытия финансовой поддержки или конфликта интересов в отношении данной публикации.</p></sec></trans-abstract><kwd-group xml:lang="ru"><kwd>противоэпилептические средства</kwd><kwd>вальпроевая кислота</kwd><kwd>1</kwd><kwd>3</kwd><kwd>4-тиадиазол</kwd><kwd>пентилентетразол-индуцированные судороги</kwd><kwd>максимальный электрошок</kwd></kwd-group><kwd-group xml:lang="en"><kwd>antiepileptic drugs</kwd><kwd>valproic acid</kwd><kwd>pentylenetetrazole-induced seizures</kwd><kwd>maximal electroshock</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">Фрейдкова Н.В., Пылаева О.В., Мухин К.Ю. Вальпарин ХР в лечении эпилепсии (обзор литературы и описание клинических случаев). 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