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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="en"><front><journal-meta><journal-id journal-id-type="publisher-id">sechenov</journal-id><journal-title-group><journal-title xml:lang="en">Sechenov Medical Journal</journal-title><trans-title-group xml:lang="ru"><trans-title>Сеченовский вестник</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2218-7332</issn><issn pub-type="epub">2658-3348</issn><publisher><publisher-name>Сеченовский Университет</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.47093/2218-7332.2025.16.2.18-27</article-id><article-id custom-type="elpub" pub-id-type="custom">sechenov-1325</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="en"><subject>PATHOLOGICAL PHYSIOLOGY</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="ru"><subject>ПАТОЛОГИЧЕСКАЯ ФИЗИОЛОГИЯ</subject></subj-group></article-categories><title-group><article-title>Etamsylate enhances platelet aggregation through G-proteincoupled receptors in patients with macrohematuria following ureteral lithotripsy: a single-center nonrandomized study</article-title><trans-title-group xml:lang="ru"><trans-title>Этамзилат усиливает агрегацию тромбоцитов через рецепторы из семейства G-белков у пациентов с макрогематурией после уретеролитотрипсии: одноцентровое нерандомизированное исследование</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-8070-2242</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Баринов</surname><given-names>Э. Ф.</given-names></name><name name-style="western" xml:lang="en"><surname>Barinov</surname><given-names>E. F.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Баринов Эдуард Федорович, д-р мед. наук, профессор, заведующий кафедрой гистологии, цитологии, эмбриологии и молекулярной медицины</p><p>пр-т Ильича, д. 16, г. Донецк, 283003</p></bio><bio xml:lang="en"><p>Edward F. Barinov, Dr. of Sci. (Medicine), Professor, Head of the Department of Histology, Cytology, Embryology and Molecular Medicine</p><p>16, Ilyicha Ave., Donetsk, 84003</p></bio><email xlink:type="simple">barinov.ef@gmail.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/0000-0002-0279-1294</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Гиллер</surname><given-names>Д. И.</given-names></name><name name-style="western" xml:lang="en"><surname>Giller</surname><given-names>D. I.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Гиллер Дина Игоревна, ассистент кафедры гистологии, цитологии, эмбриологии и молекулярной медицины</p><p>пр-т Ильича, д. 16, г. Донецк, 283003</p></bio><bio xml:lang="en"><p>Dina I. Giller, Assistant Professor, Department of Histology, Cytology, Embryology and Molecular Medicine</p><p>16, Ilyicha Ave., Donetsk, 84003</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/0009-0001-8400-6500</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Ахундова</surname><given-names>С. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Akhundova</surname><given-names>S. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Ахундова Сабина Акбер кызы, ассистент кафедры гистологии, цитологии и эмбриологии и молекулярной медицины</p><p>пр-т Ильича, д. 16, г. Донецк, 283003</p></bio><bio xml:lang="en"><p>Sabina A. Akhundova, Assistant Professor, Department of Histology, Cytology, Embryology and Molecular Medicine</p><p>16, Ilyicha Ave., Donetsk, 84003</p></bio><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>ФГБУ ВО «Донецкий государственный медицинский университет имени М. Горького» Министерства здравоохранения Российской Федерации</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Donetsk State Medical University</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2025</year></pub-date><pub-date pub-type="epub"><day>31</day><month>07</month><year>2025</year></pub-date><volume>16</volume><issue>2</issue><fpage>18</fpage><lpage>27</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Barinov E.F., Giller D.I., Akhundova S.A., 2025</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="ru">Баринов Э.Ф., Гиллер Д.И., Ахундова С.А.</copyright-holder><copyright-holder xml:lang="en">Barinov E.F., Giller D.I., Akhundova S.A.</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://www.sechenovmedj.com/jour/article/view/1325">https://www.sechenovmedj.com/jour/article/view/1325</self-uri><abstract><p>Aim. To evaluate the effect of etamsylate on the activation of signaling pathways involved in the regulation of platelet aggregation in the setting of macrohematuria following ureteral lithotripsy (ULT).Material and methods. A total of 192 patients undergoing ULT followed by ethamsylate administration were assessed for inclusion in the study. All patients received nonsteroidal anti-inflammatory drugs. The study included 42 patients (20 men and 22 women; mean age 54.2 ± 15.1 years) who developed macrohematuria following administration of three doses of etamsylate (125 mg I.V. the first dose was administered 6 hours after ULT, followed by further doses every 6 hours). Platelet receptor activity was assessed before and after administration of the fourth dose of ethamsylate (125 mg I.V.) using standard (EC50) and subthreshold (EC10) concentrations of agonists: epinephrine, adenosine triphosphate, adenosine diphosphate (ADP), adenosine, platelet-activating factor (PAF), soluble type IV collagen, and a stable thromboxane A2 analog.Results. After administration of the fourth dose of etamsylate, macrohematuria significantly decreased compared to baseline values: 46.6 ± 8.9 vs. 76.7 ± 7.0 red blood cells per field of view (p &lt; 0.001). After administration of the fourth dose of etamsylate, upon stimulation with standard agonist concentrations (EC50), there was a significant increase in the activity of the PAF receptor by 9.1% (p = 0.007), the thromboxane prostanoid receptor by 7.9% (p = 0.006), the glycoprotein VI receptor by 22.8% (p &lt; 0.001), and ethamsylate-induced platelet aggregation by 10.4% (p &lt; 0.05). The maximal aggregatory response using subthreshold agonist concentrations (EC10) was observed when platelets were incubated simultaneously with ethamsylate and ADP: amplitude, slope, and AUC (area under the curve) increased by 16.9%, 60.0%, and 54.7%, respectively, compared to isolated stimulation of P2Y receptors (p &lt; 0.05), and by 26.2%, 77.2%, and 65.6%, respectively, compared to incubation with ethamsylate alone (p &lt; 0.05).Conclusion. The maximal proaggregatory effect of ethamsylate was mediated through P2Y receptors, along with modulation of thromboxane prostanoid and PAF receptors, which promote intracellular Ca²+ elevation</p></abstract><trans-abstract xml:lang="ru"><p>Цель. Оценить влияние этамзилата на активацию сигнальных путей, регулирующих агрегацию тромбоцитов, при макрогематурии, возникающей после контактной уретеролитотрипсии (КЛТ).Материал и методы. Для участия в исследовании оценены 192 пациента, которым проводилась КЛТ с последующим введением этамзилата. Все пациенты принимали нестероидные противовоспалительные препараты. В анализ включены 42 пациента (20 мужчин, 22 женщины, средний возраст 54,2 ± 15,1 года), у которых после введения трех доз этамзилата (125 мг в/в первая доза через 6 часов после КЛТ, далее каждые 6 часов) сохранялась макрогематурия. До и после введения четвертой дозы этамзилата (125 мг в/в) оценена активность рецепторов тромбоцитов при введении стандартных (ЕС50) и субпороговых (ЕС10) концентраций агонистов: эпинефрин, аденозинтрифосфат, аденозиндифосфат (АДФ), аденозин, фактор активации тромбоцитов (ФАТ), растворимый коллаген IV типа и стабильный аналог тромбоксана А2.Результаты. После введения четвертой дозы этамзилата макрогематурия статистически значимо снижалась по сравнению с показателем до введения: 46,6 ± 8,9 vs. 76,7 ± 7,0 эритроцитов в поле зрения (р &lt; 0,001). После введения четвертой дозы этамзилата при использовании стандартных доз агонистов (ЕС50) повышалась активность ФАТ-рецептора на 9,1% (р = 0,007), ТР-рецептора (thromboxane prostanoid, тромбоксан простаноид) – на 7,9% (р = 0,006), GPVI-рецептора (Glycoprotein VI, гликопротеин VI) – на 22,8% (р &lt; 0,001), агрегация тромбоцитов, индуцированной этамзилатом, – на 10,4% (р &lt; 0,05). Максимальный эффект агрегации после введения четвертой дозы этамзилата при использовании субпороговых (ЕС10) концентраций агонистов обнаружен при инкубации тромбоцитов одновременно с этамзилатом и АДФ: амплитуда, Slope и AUC (area under curve, площадь под кривой) были выше на 16,9, 60,0 и 54,7% соответственно относительно таковых при изолированной стимуляции P2Y-рецепторов (р &lt; 0,05) и на 26,2, 77,2 и 65,6% больше, чем при инкубации тромбоцитов только с этамзилатом (р &lt; 0,05).Заключение. Максимальный проагрегантный эффект этамзилата осуществлялся посредством Р2Y- рецепторов, также отмечена модуляция ТР-рецепторов и ФАТ-рецепторов, обеспечивающих повышение уровня внутриклеточного Са2+.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>нефролитиаз</kwd><kwd>нестероидные противовоспалительные препараты</kwd><kwd>гематурия</kwd><kwd>рецепторы</kwd><kwd>связанные с G-белками</kwd><kwd>пути внутриклеточной сигнализации</kwd><kwd>синергизм рецепторов</kwd><kwd>параметры агрегатометрии</kwd></kwd-group><kwd-group xml:lang="en"><kwd>nephrolithiasis</kwd><kwd>non-steroidal anti-inflammatory drugs</kwd><kwd>hematuria</kwd><kwd>G-protein coupled receptors</kwd><kwd>intracellular signalling pathways</kwd><kwd>receptor synergism</kwd><kwd>aggregometry parameters</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">Giulioni C., Castellani D., Somani B.K., et al. 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