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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">pharmjournal</journal-id><journal-title-group><journal-title xml:lang="ru">Разработка и регистрация лекарственных средств</journal-title><trans-title-group xml:lang="en"><trans-title>Drug development &amp; registration</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2305-2066</issn><issn pub-type="epub">2658-5049</issn><publisher><publisher-name>LLC «CPHA»</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.33380/2305-2066-2026-15-2-2145</article-id><article-id custom-type="elpub" pub-id-type="custom">pharmjournal-2332</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>МЕТОДЫ АНАЛИЗА ЛЕКАРСТВЕННЫХ СРЕДСТВ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>ANALYTICAL METHODS</subject></subj-group></article-categories><title-group><article-title>Опыт проведения валидации методики оценки активации рецептора GLP-1R in vitro при стимуляции препаратом тирзепатид</article-title><trans-title-group xml:lang="en"><trans-title>Experience in validating a method for assessing GLP-1R receptor activation in vitro upon stimulation with tirzepatide</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-1443-4294</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Афанасьева</surname><given-names>А. Н.</given-names></name><name name-style="western" xml:lang="en"><surname>Afanaseva</surname><given-names>A. N.</given-names></name></name-alternatives><bio xml:lang="ru"><p>198515, г. Санкт-Петербург, поселок Стрельна, ул. Связи, д. 34-А</p></bio><bio xml:lang="en"><p>34-A, Svyazi str., Strelna settlement, Saint-Petersburg, 198515</p></bio><email xlink:type="simple">Alina.Afanaseva@geropharm.com</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-8445-1129</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Сапарова</surname><given-names>В. Б.</given-names></name><name name-style="western" xml:lang="en"><surname>Saparova</surname><given-names>V. B.</given-names></name></name-alternatives><bio xml:lang="ru"><p>198515, г. Санкт-Петербург, поселок Стрельна, ул. Связи, д. 34-А127473, г. Москва, ул. Делегатская, д. 20/1</p></bio><bio xml:lang="en"><p>34-A, Svyazi str., Strelna settlement, Saint-Petersburg, 19851520/1, Delegatskaya str., Moscow, 127473</p></bio><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0009-0005-8083-7154</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Ермолаева</surname><given-names>Д. О.</given-names></name><name name-style="western" xml:lang="en"><surname>Ermolaeva</surname><given-names>D. O.</given-names></name></name-alternatives><bio xml:lang="ru"><p>198515, г. Санкт-Петербург, поселок Стрельна, ул. Связи, д. 34-А</p></bio><bio xml:lang="en"><p>34-A, Svyazi str., Strelna settlement, Saint-Petersburg, 198515</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-2308-0608</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Макаренко</surname><given-names>И. Е.</given-names></name><name name-style="western" xml:lang="en"><surname>Makarenko</surname><given-names>I. E.</given-names></name></name-alternatives><bio xml:lang="ru"><p>198515, г. Санкт-Петербург, поселок Стрельна, ул. Связи, д. 34-А127473, г. Москва, ул. Делегатская, д. 20/1</p></bio><bio xml:lang="en"><p>34-A, Svyazi str., Strelna settlement, Saint-Petersburg, 19851520/1, Delegatskaya str., Moscow, 127473</p></bio><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-4594-6097</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Драй</surname><given-names>Р. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Dray</surname><given-names>R. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>198515, г. Санкт-Петербург, поселок Стрельна, ул. Связи, д. 34-А</p></bio><bio xml:lang="en"><p>34-A, Svyazi str., Strelna settlement, Saint-Petersburg, 198515</p></bio><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru">Закрытое акционерное общество «Фарм-Холдинг»<country>Россия</country></aff><aff xml:lang="en">Closed Joint-Stock Company "Pharm-Holding"<country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru">Закрытое акционерное общество «Фарм-Холдинг»; Федеральное государственное бюджетное образовательное учреждение высшего образования «Московский государственный медико-стоматологический университет имени А. И. Евдокимова» Министерства здравоохранения Российской Федерации<country>Россия</country></aff><aff xml:lang="en">Closed Joint-Stock Company "Pharm-Holding"; Federal State Budgetary Educational Institution of Higher Education "Moscow State University of Medicine and Dentistry named after A. I. Evdokimov" of the Ministry of Health of the Russian Federation<country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2023</year></pub-date><pub-date pub-type="epub"><day>03</day><month>04</month><year>2026</year></pub-date><volume>0</volume><issue>0</issue><issue-title>Принято в печать</issue-title><elocation-id>2332</elocation-id><permissions><copyright-statement>Copyright &amp;#x00A9; Афанасьева А.Н., Сапарова В.Б., Ермолаева Д.О., Макаренко И.Е., Драй Р.В., 2023</copyright-statement><copyright-year>2023</copyright-year><copyright-holder xml:lang="ru">Афанасьева А.Н., Сапарова В.Б., Ермолаева Д.О., Макаренко И.Е., Драй Р.В.</copyright-holder><copyright-holder xml:lang="en">Afanaseva A.N., Saparova V.B., Ermolaeva D.O., Makarenko I.E., Dray R.V.</copyright-holder><license 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.pharmjournal.ru/jour/article/view/2332">https://www.pharmjournal.ru/jour/article/view/2332</self-uri><abstract><sec><title>Введение</title><p>Введение. Тирзепатид – это молекула, способная контролировать уровень глюкозы в крови за счет объединения двойного агонизма рецепторов глюкозозависимого инсулинотропного полипептида (GIP) и глюкагоноподобного пептида-1 (GLP-1). GLP-1 и GIP – инкретиновые гормоны, участвующие в регуляции гликемии и энергетического обмена. Их комбинированная агонизация усиливает инсулиновый ответ, снижает секрецию глюкагона и аппетит, что делает ее эффективной стратегией при лечении сахарного диабета 2 типа (СД2) и ожирения. Специфическую биологическую активность таких соединений можно оценить in vitro на клеточных линиях, экспрессирующих рецепторы GLP-1R или GIPR.</p></sec><sec><title>Цель</title><p>Цель. Провести валидацию методики определения активации рецептора GLP-1R in vitro с использованием клеточной линии при стимуляции тирзепатидом в тесте «Кальциевые токи». Данный подход необходим для последующего исследования сопоставимости биоэквивалентных препаратов.</p></sec><sec><title>Материалы и методы</title><p>Материалы и методы. В качестве модели была применена генно-инженерная клеточная линия HTS163L, экспрессирующая человеческий рецептор GLP-1. Активацию рецептора регистрировали по изменению флуоресцентного сигнала, вызванного увеличением внутриклеточной концентрации кальция, после инкубации клеток с тирзепатидом в различных концентрациях. Валидация методики проводилась в соответствии с требованиями Государственной фармакопеи РФ, ICH и EMA. Статистическую обработку полученных результатов проводили с применением программного обеспечения MARS (BMG LABTECH).</p></sec><sec><title>Результаты и обсуждение</title><p>Результаты и обсуждение. Данная методика показала высокий уровень специфичности (сигнал плацебо &lt;2 % от сигнала препарата), удовлетворительный предел количественного определения (сигнал превышает сигнал холостой пробы на 43 %), хорошую линейность (R2 = 0,981), правильность (в пределах 77–119 % от номинального EC50) и прецизионность (CV ≤ 5 % внутри серии, ≤15 % между сериями). Все исследуемые валидационные показатели соответствовали установленным критериям приемлемости, что подтверждает корректность выбранного подхода.</p></sec><sec><title>Заключение</title><p>Заключение. Предложенный метод обладает высокой чувствительностью и воспроизводимостью, что делает его пригодным для функционального анализа биологической активности агонистов рецептора GLP-1, включая тирзепатид, в in-vitro-моделях.</p></sec></abstract><trans-abstract xml:lang="en"><sec><title>Introduction</title><p>Introduction. Tirzepatide is a molecule capable of controlling blood glucose levels by combining dual agonism of the glucose-dependent insulinotropic polypeptide (GIP) and glucagon-like peptide-1 (GLP-1) receptors. GLP-1 and GIP are incretin hormones involved in the regulation of glycemia and energy metabolism. Their combined agonism enhances the insulin response, reduces glucagon secretion and appetite, making it an effective strategy for the treatment of type 2 diabetes mellitus (T2DM) and obesity. The specific biological activity of such compounds can be evaluated in vitro using cell lines expressing GLP-1R or GIPR.</p></sec><sec><title>Aim</title><p>Aim. To validate a method for determining GLP-1R receptor activation in vitro using a cell line stimulated with tirzepatide in the "Calcium Flux" assay. This approach is necessary for subsequent studies of the comparability of bioequivalent drugs.</p></sec><sec><title>Materials and methods</title><p>Materials and methods. A genetically engineered HTS163L cell line expressing the human GLP-1 receptor was used as the model. Receptor activation was recorded by changes in fluorescence signal caused by an increase in intracellular calcium concentration after incubation of cells with tirzepatide at various concentrations. Method validation was carried out in accordance with the requirements of the State Pharmacopoeia of the Russian Federation, ICH, and EMA. Statistical analysis of the results was performed using MARS software (BMG LABTECH).</p></sec><sec><title>Results and discussion</title><p>Results and discussion. The applied method demonstrated a high level of specificity (placebo signal &lt;2 % of the drug signal), a satisfactory limit of quantification (signal exceeded the blank by 43 %), good linearity (R2 = 0.981), accuracy (within 77–119 % of nominal EC50), and precision (CV ≤ 5 % within runs, ≤15 % between runs). All validation parameters met the established acceptance criteria, confirming the correctness of the chosen approach.</p></sec><sec><title>Conclusion</title><p>Conclusion. The proposed method demonstrates high sensitivity and reproducibility, making it suitable for functional analysis of the biological activity of GLP-1 receptor agonists, including tirzepatide, in in vitro models.</p></sec></trans-abstract><kwd-group xml:lang="ru"><kwd>сахарный диабет 2 типа (СД2)</kwd><kwd>GLP-1-рецептор</kwd><kwd>агонисты инкретинов</kwd><kwd>фармакологическая активность</kwd><kwd>биологическая активность</kwd><kwd>EC50</kwd><kwd>флуоресцентный анализ</kwd><kwd>биоэквивалентность</kwd><kwd>доклинические исследования</kwd></kwd-group><kwd-group xml:lang="en"><kwd>type 2 diabetes mellitus (T2DM)</kwd><kwd>GLP-1 receptor</kwd><kwd>incretin agonists</kwd><kwd>pharmacological activity</kwd><kwd>biological activity</kwd><kwd>EC50</kwd><kwd>fluorescence assay</kwd><kwd>bioequivalence</kwd><kwd>preclinical studies</kwd></kwd-group><funding-group xml:lang="ru"><funding-statement>Работа выполнена при финансовой поддержке ООО «ГЕРОФАРМ». Спонсор не оказывал влияния на ход исследования и интерпретацию результатов.</funding-statement></funding-group><funding-group xml:lang="en"><funding-statement>This work was supported by "GEROPHARM". The sponsor had no influence on the study or interpretation of the results.</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">Misra S., Ke C., Srinivasan S., Goyal A., Nyriyenda M. J., Florez J. C., Khunti K., Magliano D. J., Luk A. Current insights and emerging trends in early-onset type 2 diabetes. The Lancet Diabetes &amp; Endocrinology. 2023;11(10):768–782. DOI: 10.1016/S2213-8587(23)00225-5.</mixed-citation><mixed-citation xml:lang="en">Misra S., Ke C., Srinivasan S., Goyal A., Nyriyenda M. J., Florez J. C., Khunti K., Magliano D. J., Luk A. Current insights and emerging trends in early-onset type 2 diabetes. 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