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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">Genes &amp; Cells</journal-id><journal-title-group><journal-title xml:lang="en">Genes &amp; Cells</journal-title><trans-title-group xml:lang="ru"><trans-title>Гены и Клетки</trans-title></trans-title-group><trans-title-group xml:lang="zh"><trans-title>Genes and Cells</trans-title></trans-title-group></journal-title-group><issn publication-format="print">2313-1829</issn><issn publication-format="electronic">2500-2562</issn><publisher><publisher-name xml:lang="en">Human Stem Cells Institute</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">120325</article-id><article-id pub-id-type="doi">10.23868/gc120325</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>Articles</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>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">Role of potassium channels in the negative inotropic effect of hydrogen sulfide in mouse atrium</article-title><trans-title-group xml:lang="ru"><trans-title>Роль КАЛИЕВЫХ КАНАЛОВ В ОТРИЦАТЕЛЬНОМ ИНОТРОПНОМ ЭФФЕКТЕ СЕРОВОДОРОДА В ПРЕДСЕРДИИ МЫШИ</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Lifanova</surname><given-names>A. S</given-names></name><name xml:lang="ru"><surname>Лифанова</surname><given-names>А. С</given-names></name></name-alternatives><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Khaertdinov</surname><given-names>N. N</given-names></name><name xml:lang="ru"><surname>Хаертдинов</surname><given-names>Н. Н</given-names></name></name-alternatives><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Zakharov</surname><given-names>A. V</given-names></name><name xml:lang="ru"><surname>Захаров</surname><given-names>А. В</given-names></name></name-alternatives><xref ref-type="aff" rid="aff1"/><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Gizzatullin</surname><given-names>A. R</given-names></name><name xml:lang="ru"><surname>Гиззатуллин</surname><given-names>А. Р</given-names></name></name-alternatives><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Sitdikova</surname><given-names>G. F</given-names></name><name xml:lang="ru"><surname>Ситдикова</surname><given-names>Г. Ф</given-names></name></name-alternatives><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Kazan (Volga region) Federal University</institution></aff><aff><institution xml:lang="ru">Казанский (Приволжский) федеральный университет</institution></aff></aff-alternatives><aff-alternatives id="aff2"><aff><institution xml:lang="en">Kazan State Medical University</institution></aff><aff><institution xml:lang="ru">Казанский государственный медицинский университет</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2014-09-15" publication-format="electronic"><day>15</day><month>09</month><year>2014</year></pub-date><volume>9</volume><issue>3</issue><issue-title xml:lang="en">VOL 9, NO3 (2014)</issue-title><issue-title xml:lang="ru">ТОМ 9, №3 (2014)</issue-title><fpage>94</fpage><lpage>98</lpage><history><date date-type="received" iso-8601-date="2023-01-05"><day>05</day><month>01</month><year>2023</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2014, Eco-Vector</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2014, Эко-Вектор</copyright-statement><copyright-year>2014</copyright-year><copyright-holder xml:lang="en">Eco-Vector</copyright-holder><copyright-holder xml:lang="ru">Эко-Вектор</copyright-holder><ali:free_to_read xmlns:ali="http://www.niso.org/schemas/ali/1.0/"/></permissions><self-uri xlink:href="https://genescells.ru/2313-1829/article/view/120325">https://genescells.ru/2313-1829/article/view/120325</self-uri><abstract xml:lang="en"><p>The effect of sodium hydrosulfide (NaHS) - donor of hydrogen sulfide (H2S) on the force of contraction of isolated mouse atrium was studied. Cumulative application of NaHS in concentrations 100, 200 and 300 ^M induced dose-dependent decrease of the force of contraction, the maximum velocity of contraction and relaxation of the myocardium. A substrate of H2S synthesis - L-cysteine in concentrations 1, 10, 50 uM also had the negative inotropic action, whereas a blocker of H2S synthesis - p-cyano alanine caused an increase of the force of contraction. Inhibition of K-channels by tetraethylammonium (2 mM) caused the increase of the amplitude of contraction and the reduction of negative inotropic effect of NaHS in all used concentrations. After the inhibition of ATP-dependent K-channels by glibenclamide NaHS action was prevented in concentration 100 uM, significantly decreased in concentration 200 uM and didn't changed in concentration 300 uM. Activation of ATP-dependent K-channels by diazoxide did not affect the negative inotropic effect of NaHS. The obtained data suppose that in the mouse atrium exogenous and endogenous H2S causes a reduction of the force of contraction, which is mediated by the activation of ATP-dependent, calcium-activated or voltage-dependent K-channels.</p></abstract><trans-abstract xml:lang="ru"><p>Исследовали влияние гидросульфида натрия (NaHS) - донора сероводорода (H2S) на силу сокращения изолированных предсердий мыши. NaHS при кумулятивной аппликации в концентрациях 100, 200, 300 мкМ оказывал доза-зависимое действие, выражающиеся в уменьшении амплитуды сокращений, максимальной скорости сокращения и расслабления миокарда. Субстрат синтеза H2S - L-цистеин в концентрациях 1, 10, 50 мкМ также оказывал отрицательный интропный эффект, тогда как блокатор фермента синтеза H2S - р-цианоаланин вызывал усиление силы сокращения. Ингибирование К-каналов тетраэтилам-монием (2 мМ) приводило к усилению амплитуды сокращения миокарда и уменьшению отрицательного инотропно-го эффекта NaHS во всех использованных концентрациях. В условиях ингибирования АТФ-зависимых К-каналов гли-бенкламидом эффект NaHS не проявлялся в концентрации 100 мкМ, значительно снимался в концентрации 200 мкМ и полностью сохранялся в концентрации 300 мкМ. Активация АТФ-зависимых К-каналов диазоксидом не влияла на проявление отрицательного инотропного эффекта NaHS. Полученные данные свидетельствуют, что в миокарде предсердий мыши экзогенный и эндогенный H2S вызывает уменьшение силы сокращений, которое опосредуется активацией АТФ-зависимых, кальций-активируемых или по-тенциал-зависимых К-каналов.</p></trans-abstract><kwd-group xml:lang="en"><kwd>hydrogen sulfide</kwd><kwd>ATP-dependent potassium channel</kwd><kwd>voltage-dependent potassium channels</kwd><kwd>calcium-activated potassium channels</kwd><kwd>L-cysteine</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>сероводород</kwd><kwd>сократимость миокарда</kwd><kwd>АТФ-зависимые калиевые каналы</kwd><kwd>потенциал-зависи-мые калиевые каналы</kwd><kwd>кальций-активируемые калиевые каналы</kwd><kwd>L-цистеин</kwd></kwd-group></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Gerasimova E.V., Sitdikova G.F., Zefirov A.L. Hydrogen sulfide as an endogenous modulator of mediator release in the frog neuromuscular synapse. Neurochem. 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