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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">Annals of the Russian academy of medical sciences</journal-id><journal-title-group><journal-title xml:lang="en">Annals of the Russian academy of medical sciences</journal-title><trans-title-group xml:lang="ru"><trans-title>Вестник Российской академии медицинских наук</trans-title></trans-title-group></journal-title-group><issn publication-format="print">0869-6047</issn><issn publication-format="electronic">2414-3545</issn><publisher><publisher-name xml:lang="en">"Paediatrician" Publishers LLC</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">18006</article-id><article-id pub-id-type="doi">10.15690/vramn18006</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>PHARMACOLOGY: CURRENT ISSUES</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>АКТУАЛЬНЫЕ ВОПРОСЫ ФАРМАКОЛОГИИ И ФАРМАЦИИ</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">Evaluation of changes in the characteristics of beta2-adrenergic receptors in healthy volunteers under the influence of cholinergics using a modified radioligand analysis technique</article-title><trans-title-group xml:lang="ru"><trans-title>Оценка изменения характеристик бета2-адренорецепторов у здоровых добровольцев под влиянием холинергиков с использованием модифицированной методики радиолигандного анализа</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-9333-0022</contrib-id><contrib-id contrib-id-type="spin">2813-1638</contrib-id><name-alternatives><name xml:lang="en"><surname>Eremenko</surname><given-names>Anna V.</given-names></name><name xml:lang="ru"><surname>Ерёменко</surname><given-names>Анна Владимировна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>MD</p></bio><bio xml:lang="ru"><p>врач</p></bio><email>a_nn87@list.ru</email><xref ref-type="aff" rid="aff1"/><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-1904-5319</contrib-id><contrib-id contrib-id-type="spin">1751-0230</contrib-id><name-alternatives><name xml:lang="en"><surname>Smolyakova</surname><given-names>Ekaterina V.</given-names></name><name xml:lang="ru"><surname>Смолякова</surname><given-names>Екатерина Владимировна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>MD, PhD</p></bio><bio xml:lang="ru"><p>к.м.н.</p></bio><email>smolyakovak@mail.ru</email><xref ref-type="aff" rid="aff1"/><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-3659-3939</contrib-id><contrib-id contrib-id-type="spin">4275-6780</contrib-id><name-alternatives><name xml:lang="en"><surname>Skoblov</surname><given-names>Yuri S.</given-names></name><name xml:lang="ru"><surname>Скоблов</surname><given-names>Юрий Самойлович</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>MD, PhD in Biology</p></bio><bio xml:lang="ru"><p>д.б.н.</p></bio><email>uskoblov@gmail.com</email><xref ref-type="aff" rid="aff3"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-9277-2291</contrib-id><contrib-id contrib-id-type="spin">5267-9598</contrib-id><name-alternatives><name xml:lang="en"><surname>Rvacheva</surname><given-names>Anna V.</given-names></name><name xml:lang="ru"><surname>Рвачева</surname><given-names>Анна Валерьевна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>MD, PhD</p></bio><bio xml:lang="ru"><p>к.м.н.</p></bio><email>arvatcheva@mail.ru</email><xref ref-type="aff" rid="aff1"/><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-3385-2632</contrib-id><contrib-id contrib-id-type="spin">6269-7990</contrib-id><name-alternatives><name xml:lang="en"><surname>Zykov</surname><given-names>Kirill A.</given-names></name><name xml:lang="ru"><surname>Зыков</surname><given-names>Кирилл Алексеевич</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>MD, PhD, Professor, Corresponding Member of the RAS</p></bio><bio xml:lang="ru"><p>д.м.н., профессор, член-корреспондент РАН</p></bio><email>kirillaz@inbox.ru</email><xref ref-type="aff" rid="aff1"/><xref ref-type="aff" rid="aff2"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Pulmonology Scientific Research Institute</institution></aff><aff><institution xml:lang="ru">Научно-исследовательский институт пульмонологии</institution></aff></aff-alternatives><aff-alternatives id="aff2"><aff><institution xml:lang="en">Russian University of Medcine</institution></aff><aff><institution xml:lang="ru">Российский университет медицины</institution></aff></aff-alternatives><aff-alternatives id="aff3"><aff><institution xml:lang="en">Shemyakin–Ovchinnikov Institute of Bioorganic Chemistry of the Russian Academy of Sciences</institution></aff><aff><institution xml:lang="ru">Институт биоорганической химии им. академиков М.М. Шемякина и Ю.А. Овчинникова Российской академии наук</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2025-02-17" publication-format="electronic"><day>17</day><month>02</month><year>2025</year></pub-date><volume>80</volume><issue>1</issue><issue-title xml:lang="en"/><issue-title xml:lang="ru"/><fpage>49</fpage><lpage>57</lpage><history><date date-type="received" iso-8601-date="2024-08-03"><day>03</day><month>08</month><year>2024</year></date><date date-type="accepted" iso-8601-date="2025-02-08"><day>08</day><month>02</month><year>2025</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2025, "Paediatrician" Publishers LLC</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2025, Издательство "Педиатръ"</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="en">"Paediatrician" Publishers LLC</copyright-holder><copyright-holder xml:lang="ru">Издательство "Педиатръ"</copyright-holder><ali:free_to_read xmlns:ali="http://www.niso.org/schemas/ali/1.0/" start_date="2025-11-17"/></permissions><self-uri xlink:href="https://vestnikramn.spr-journal.ru/jour/article/view/18006">https://vestnikramn.spr-journal.ru/jour/article/view/18006</self-uri><abstract xml:lang="en"><p><bold>Background.</bold> Reseaching of the properties of β-adrenergic receptors (β-AR) is an urgent area in both fundamental and applied medicine. One of the most exact ways to determine the characteristics of β-AR is the radioligand method using [125I]cyanopindolol. This method сan determine the binding activity of β-AR on human blood cells. It is especially important to study the receptor link under the influence of various external factors and drugs. <bold>Aims</bold> — to evaluate the binding activity of β2-AR on T-lymphocytes of peripheral blood cells using radioligand analysis in healthy volunteers and in professional athletes under the influence of cholinergics. <bold>Methods.</bold> Healthy volunteers and athletes were given methacholine inhalation. Blood sampling was carried out initially on a clean background and after the methacholine test. To level out the differences in the conditions of formulation and to bring the results to the same coordinate system, the evaluation of the characteristics of β-AR in the framework of the study was carried out according to the specific binding index (ISS) — value reflecting the proportion of specific binding of receptors from the total specific. <bold>Results.</bold> During the study, when dividing volunteers into smokers and non-smokers, a tendency to decrease binding activity was noted. As a result of the study, in the general group of volunteers was registerd a significant decrease in the binding activity of beta2 receptors under the influence of methacholine. In the group of athletes, no significant changes were kept. <bold>Conclusions.</bold> The reason for these results may be both intense training, which changes the number of receptors, and the presence or absence of eosinophilic inflammation. The smoking factor does not play a significant role.</p></abstract><trans-abstract xml:lang="ru"><p><bold>Обоснование. </bold>Изучение свойств β-адренорецепторов (β-АР) является актуальным направлением как в фундаментальной, так и прикладной медицине. Одним из наиболее точных способов определения характеристик β-АР выступает радиолигандный метод с применением [125I] цианопиндолола, позволяющего определить активность связывания β-АР на клетках крови человека. Особенно актуально изучение рецепторного звена под воздействием различных внешних факторов и препаратов. <bold>Цель исследования</bold> — оценка активности связывания β2-АР на Т-лимфоцитах периферической крови с использованием радиолигандного анализа у здоровых добровольцев и профессиональных спортсменов под влиянием холинергиков. <bold>Методы.</bold> Группе здоровых добровольцев и спортсменов проводились ингаляции метахолина. Забор крови проводился исходно на чистом фоне и после проведения метахолинового теста. Для нивелирования различий условий постановки и приведения результатов к одной системе координат оценка характеристик β-АР в рамках исследования производилась по индексу специфического связывания, представляющему собой безразмерную величину, которая отражает долю специфического связывания рецепторов от общего специфического связывания. <bold>Результаты.</bold> В ходе исследования при разделении добровольцев на курильщиков и некурильщиков отмечена тенденция к снижению активности связывания бета-рецепторов. В результате исследования было зарегистрировано достоверное снижение активности связывания бета2-рецепторов под влиянием метахолина в общей группе добровольцев. В группе же спортсменов каких-либо значимых изменений не зафиксировано. <bold>Заключение. </bold>Причиной полученных результатов могут быть как интенсивные тренировки, которые меняют количество рецепторов, так и наличие или отсутствие эозинофильного воспаления. Фактор курения играет не столь значительную роль.</p></trans-abstract><kwd-group xml:lang="en"><kwd>beta receptors</kwd><kwd>M-cholinergic receptors</kwd><kwd>GPCR receptors</kwd><kwd>methacholine</kwd><kwd>radioligand research method</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>бета-рецепторы</kwd><kwd>М-холинорецепторы</kwd><kwd>GPCR-рецепторы</kwd><kwd>метахолин</kwd><kwd>радиолигандный метод исследования</kwd></kwd-group><funding-group><award-group><funding-source><institution-wrap><institution xml:lang="ru">Федеральное медико-биологическое агентство</institution></institution-wrap><institution-wrap><institution xml:lang="en">Federal Medical-Biological Agency of the Russian Federation</institution></institution-wrap></funding-source></award-group></funding-group></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Eglen RM, Hegde SS, Watson N. Muscarinic receptor subtypes and smooth muscle function. 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