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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">vestnik-bio-msu</journal-id><journal-title-group><journal-title xml:lang="ru">Вестник Московского университета. Серия 16. Биология</journal-title><trans-title-group xml:lang="en"><trans-title>Vestnik Moskovskogo universiteta. Seriya 16. Biologiya</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">0137-0952</issn><publisher><publisher-name>Lomonosov Moscow State University,  School of Biology</publisher-name></publisher></journal-meta><article-meta><article-id custom-type="elpub" pub-id-type="custom">vestnik-bio-msu-995</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>ОРИГИНАЛЬНОЕ ИССЛЕДОВАНИЕ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>RESEARCH ARTICLE</subject></subj-group></article-categories><title-group><article-title>Калиевые токи входящего выпрямления IK1 и IKACh в рабочем миокарде японского перепела (Coturnix japonica)</article-title><trans-title-group xml:lang="en"><trans-title>Inward rectifier currents IK1 and IKACh in working myocardium of Japanese quail (Coturnix japonica)</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-0131-1911</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Филатова</surname><given-names>Т. С.</given-names></name><name name-style="western" xml:lang="en"><surname>Filatova</surname><given-names>T. S.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Филатова Татьяна Сергеевна – мл. науч. сотр. кафедры физиологии человека и животных биологического факультета МГУ; лаборант-исследователь лаборатории электрофизиологии сердца Национального медицинского исследовательского центра кардиологии; мл. науч. сотр. кафедры физиологии Российского национального исследовательского медицинского университета имени Н.И. Пирогова</p><p>119234, г. Москва, Ленинские горы, д. 1, стр. 12121552, г. Москва, ул. Черепковская 3-я, д. 15а117997, г. Москва, ул. Островитянова, д. 1Тел.: 8-929-515-25-78</p></bio><bio xml:lang="en"><p>Department of Human and Animal PhysiologyLaboratory of Cardiac ElectrophysiologyDepartment of Physiology</p><p>Leninskiye gory, 1–12, Moscow, 1192343rd Cherepkovskaya str., 15A, MoscowOstrovityanova str., 1, Moscow</p></bio><email xlink:type="simple">filatova@mail.bio.msu.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-5751-8853</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Абрамочкин</surname><given-names>Д. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Abramochkin</surname><given-names>D. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Абрамочкин Денис Валерьевич – докт. биол. наук, вед. науч. сотр. кафедры физиологии человека и животных биологического факультета МГУ; зав. лабораторией электрофизиологии сердца Национального медицинского исследовательского центра кардиологии; профессор кафедры физиологии Российского национального исследовательского медицинского университета имени Н.И. Пирогова</p><p>119234, г. Москва, Ленинские горы, д. 1, стр. 12121552, г. Москва, ул. Черепковская 3-я, д. 15а117997, г. Москва, ул. Островитянова, д. 1Тел.: 8-916-603-05-02</p></bio><bio xml:lang="en"><p>Department of Human and Animal PhysiologyLaboratory of Cardiac ElectrophysiologyDepartment of Physiology</p><p>Leninskiye gory, 1–12, Moscow, 1192343rd Cherepkovskaya str., 15A, MoscowOstrovityanova str., 1, Moscow</p></bio><email xlink:type="simple">abram340@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Московский государственный университет имени М.В. Ломоносова; Национальный медицинский исследовательский центр кардиологии; Российский национальный исследовательский медицинский университет имени Н.И. Пирогова</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Lomonosov Moscow State University; National Medical Research Center for Cardiology; Pirogov Russian National Research Medical University</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2021</year></pub-date><pub-date pub-type="epub"><day>31</day><month>05</month><year>2021</year></pub-date><volume>76</volume><issue>2</issue><fpage>83</fpage><lpage>89</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Филатова Т.С., Абрамочкин Д.В., 2021</copyright-statement><copyright-year>2021</copyright-year><copyright-holder xml:lang="ru">Филатова Т.С., Абрамочкин Д.В.</copyright-holder><copyright-holder xml:lang="en">Filatova T.S., Abramochkin D.V.</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://vestnik-bio-msu.elpub.ru/jour/article/view/995">https://vestnik-bio-msu.elpub.ru/jour/article/view/995</self-uri><abstract><p>Несмотря на то, что эмбрионы птиц широко используются в исследованиях, клеточные и молекулярные аспекты физиологии сердца взрослых птиц изучены слабо. Недавние исследования показали, что, несмотря на отдаленное систематическое положение, набор реполяризующих калиевых токов в сердце птиц напоминает таковой у млекопитающих и, в частности, у человека, что позволяет считать птиц потенциальным модельным объектом в экспериментальной кардиологии. Данное исследование впервые характеризует калиевые токи входящего выпрямления в рабочем миокарде перепела. С помощью метода пэтч-кламп в изолированных предсердных и желудочковых миоцитах перепела был зарегистрирован основной фоновый ток входящего выпрямления IK1 . Входящая и выходящая компоненты IK1 в желудочковых клетках превышали таковые в предсердных, различия в степени выпрямления тока не были выявлены. Карбахол вызывал активацию ацетилхолинзависимого тока входящего выпрямления IKACh в предсердных, но не в желудочковых миоцитах. Ток IKACh в предсердных миоцитах был чувствителен к терциапину. Конститутивно активный ацетилхолинзависимый ток IKACh не был обнаружен ни в предсердных, ни в желудочковых клетках. В многоклеточных препаратах правого предсердия перепела карбахол вызывал гиперполяризацию и укорочение потенциалов действия, тогда как в препаратах правого желудочка эти эффекты отсутствовали. Активация тока IKACh под действием карбахола была дозозависимой с EC50 =4,922×10 М. Описанное распределение токов входящего выпрямления IK1 и IKACh в миокарде-7 птиц сходно с таковым у млекопитающих, используемых в качестве экспериментальных объектов в физиологических исследованиях.</p></abstract><trans-abstract xml:lang="en"><p>Birds acquired endothermy and four-chambered heart independently from mammals in the course of evolution. Though avian embryos are widely used in experiments, little is known about adult avian heart. Recent studies have shown that despite of big evolutionary distance, the set of repolarizing potassium currents in avian myocardium resembles that in mammalian heart as well as in humans. That allows to propose birds as a potential model in experimental cardiology. The present study for the first time describes inward rectifier potassium currents in working myocardium of quail. Using patch clamp method, we recorded main background inward rectifier current IK1 in isolated atrial and ventricular cardiomyocytes of quail. Both inward and outward components of IK1 in ventricular cells were larger than those in atrial cells, while there were no differences in voltage dependence of inward rectification. Acetylcholine and carbachol induced activation of acetylcholine-dependent inward rectifier current IKACh in atrial, but not in ventricular myocytes. IKACh in atrial myocytes was sensitive to tertiapin. Constitutively active IKACh has not been detected. In multicellular preparations of quail right atrium carbachol induced hyperpolarization and shortening of action potentials, while in preparations of right ventricle no such effects were observed. Activation of IKACh upon application of carbachol was dose-dependent with EC50=4,922∙10-7М. The described distribution of inward rectifier currents in avian myocardium is similar to that in mammalian species, which are widely used as model objects in experimental cardiology.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>птицы</kwd><kwd>рабочий миокард</kwd><kwd>биоэлектрическая активность</kwd><kwd>изолированные кардиомиоциты</kwd><kwd>пэтч-кламп</kwd><kwd>ионные токи</kwd></kwd-group><kwd-group xml:lang="en"><kwd>birds</kwd><kwd>working myocardium</kwd><kwd>bioelectrical activity</kwd><kwd>isolated cardiomyocytes</kwd><kwd>patch clamp</kwd><kwd>ionic currents</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Работа выполнена при финансовой поддержке Российского фонда фундаментальных исследований (проект № 19-34-90142).</funding-statement><funding-statement xml:lang="en">The research was funded by Russian Foundation for Basic Research, project number 19-34-90142.</funding-statement></funding-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Shiels H.A., Galli G.L.J. 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