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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">cardio</journal-id><journal-title-group><journal-title xml:lang="ru">Кардиология</journal-title><trans-title-group xml:lang="en"><trans-title>Kardiologiia</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">0022-9040</issn><issn pub-type="epub">2412-5660</issn><publisher><publisher-name>Kardiomag</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10087/cardio.2017.11.10052</article-id><article-id custom-type="elpub" pub-id-type="custom">cardio-53</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>ЭКСПЕРИМЕНТАЛЬНАЯ КАРДИОЛОГИЯ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>EXPERIMENTAL CARDIOLOGY</subject></subj-group></article-categories><title-group><article-title>Внутриклеточные молекулярные механизмы адренергической регуляции мембранного потенциала миокарда легочных вен</article-title><trans-title-group xml:lang="en"><trans-title>Intracellular Molecular Mechanisms of Adrenergic Regulation of Pulmonary Vein Myocardium Membrane Potential</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>Каримова</surname><given-names>В. М.</given-names></name><name name-style="western" xml:lang="en"><surname>Karimova</surname><given-names>V. M.</given-names></name></name-alternatives><email xlink:type="simple">vm-karimova@yandex.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>Кузьмин</surname><given-names>В. С.</given-names></name><name name-style="western" xml:lang="en"><surname>Kuzmin</surname><given-names>V. S.</given-names></name></name-alternatives><email xlink:type="simple">noemail@neicon.ru</email><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Розенштраух</surname><given-names>Л. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Rosenshtraukh</surname><given-names>L. V.</given-names></name></name-alternatives><email xlink:type="simple">noemail@neicon.ru</email><xref ref-type="aff" rid="aff-3"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>ФГБОУ ВО «Московский государственный университет им. М. В. Ломоносова»</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Lomonosov Moscow State University</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>ФГБОУ ВО «Московский государственный университет им. М. В. Ломоносова»; ФГБУ «Национальный медицинский исследовательский центр кардиологии» Минздрава РФ</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Lomonosov Moscow State University; National Medical Research Center for Cardiology</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-3"><aff xml:lang="ru"><institution>ФГБУ «Национальный медицинский исследовательский центр кардиологии» Минздрава РФ</institution><country>Россия</country></aff><aff xml:lang="en"><institution>National Medical Research Center for Cardiology</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2017</year></pub-date><pub-date pub-type="epub"><day>17</day><month>11</month><year>2018</year></pub-date><volume>57</volume><issue>11</issue><fpage>34</fpage><lpage>41</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Kardiomag, 2018</copyright-statement><copyright-year>2018</copyright-year><copyright-holder xml:lang="ru">Kardiomag</copyright-holder><copyright-holder xml:lang="en">Kardiomag</copyright-holder><license xlink:href="https://cardio.elpub.ru/jour/about/submissions#copyrightNotice" xlink:type="simple"><license-p>https://cardio.elpub.ru/jour/about/submissions#copyrightNotice</license-p></license></permissions><self-uri xlink:href="https://cardio.elpub.ru/jour/article/view/53">https://cardio.elpub.ru/jour/article/view/53</self-uri><abstract><p>Миокардиальная ткань стенки легочных вен (ЛВ) млекопитающих и человека обладает рядом электрофизиологических свойств, которые способствуют возникновению в данной структуре предсердных аритмий, в том числе фибрилляции предсердий. Одним из таких свойств является нестабильный уровень мембранного потенциала покоя (ПП), колебания которого усиливаются при адренергической стимуляции. Установлено, что активация β-адренорецепторов приводит к гиперполяризации ПП, а активация α1-адренорецепторов - к деполяризации ПП в ЛВ. Внутриклеточные механизмы, определяющие разнонаправленные сдвиги ПП в ЛВ при α1- и β-адренергической стимуляции, не исследованы. С помощью стандартной микроэлектродной техники в многоклеточных изолированных перфузируемых препаратах ЛВ крысы показано, что форсколин вызвал гиперполяризацию, сравнимую по величине с таковой при действии агониста β-адренорецепторов изопротеренола. Ингибиторы протеинкиназы А (РКА) КТ5720, Н-89 и Rp-adenosine-cAMP подавляли гиперполяризующий эффект изопротеренола. Ингибирование фосфолипазы С и D (PLC, PLD), а также протеинкиназы С (PKC) не влияло на деполяризацию, вызываемую агонистом α1-адренорецепторов фенилэфрином. Таким образом, β-адренергическая гиперполяризация ПП в миокардиальной ткани ЛВ крысы в значительной степени обусловлена «классическим» cAMP-зависимым сигнальным каскадом и РКА. Деполяризация ПП, возникающая в ответ на стимуляцию α1-адренорецепторов в ЛВ, и скорее всего, не связна с активацией PLC, PLD, PKC и фосфатидилинозитольным сигнальным каскадом.</p></abstract><trans-abstract xml:lang="en"><p>Pulmonary vein (PV) myocardium is characterized by numerous electrophysiological properties which make this tissue highly prone to spontaneous, ectopic activity partially due to resting potential (RP) instability. PV derived ectopy frequently underlies supraventricular arrhythmias, including atrial fibrillation. It has also been demonstrated that adrenergic stimulation causes proarrhythmic alterations in PV. Selective α1- and β-adrenoreceptors stimulation causes RP depolarization and hyperpolarization, respectively, at least in rats. The intracellular mechanisms of α1- and β-adrenoreceptors-dependent RP drifts are not investigated. Adenylate cyclase (AC) activator forscolin similarly to selective β-adrenoreceptors agonist isoproterenol (ISO) induced strong hyperpolarization in quiescent isolated perfused multicellular preparations of rat PV. Maximal value of hyperpolarization in PV was equal after application of both compounds. Proteinkinase A (PKA) inhibitors КТ5720, H-89 and Rp-adenosine-cAMP suppressed ISO-induced hyperpolarization in PV. Inhibitors of phospholipase C (U73122) or D (FIPI), similarly to proteinkinase C (PKC) inhibitor chelerythrine, failed to suppress α1-adrenoreceptors-dependent phenylephrine-induced depolarization in rat PV myocardium. These results allow us to suggest that ß-adrenoreceptors-dependent RP hyperpolarization in quiescent rat PV myocardium is only partially mediated by cAMP-dependent signal transduction pathway and by PKA. Besides, PKA-independent mechanisms also contribute to β-agonists effects in PV. In addition, α-adrenoreceptors-dependent depolarization in rat PV myocardium could be independent on PLC and PKC.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>миокардиальная обкладка</kwd><kwd>легочные вены</kwd><kwd>потенциал покоя</kwd><kwd>адренергическая регуляция</kwd><kwd>протеинкиназа С</kwd><kwd>ингибиторы протеинкиназы А</kwd><kwd>аритмия</kwd><kwd>myocardial sleeves</kwd><kwd>pulmonary veins</kwd><kwd>resting potential</kwd><kwd>adrenergic regulation</kwd><kwd>proteinkinase C</kwd><kwd>proteinkinase A</kwd><kwd>arrhythmia</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">Masani F. Node-like cells in the myocardial layer of the pulmonary vein of rats: an ultrastructural study. J. Anat 1986;145:133-142.</mixed-citation><mixed-citation xml:lang="en">Masani F. 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