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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">Therapy</journal-id><journal-title-group><journal-title xml:lang="en">Therapy</journal-title><trans-title-group xml:lang="ru"><trans-title>Терапия</trans-title></trans-title-group></journal-title-group><issn publication-format="print">2412-4036</issn><issn publication-format="electronic">2713-1823</issn><publisher><publisher-name xml:lang="en">Bionika Media</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">637466</article-id><article-id pub-id-type="doi">10.18565/therapy.2024.7.43-49</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>ORIGINAL STUDIES</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>ОРИГИНАЛЬНЫЕ ИССЛЕДОВАНИЯ</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">Estimation of the platelet component of hemostasis in COVID-19 patients</article-title><trans-title-group xml:lang="ru"><trans-title>Оценка тромбоцитарного компонента гемостаза у пациентов с COVID-19</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-2623-2657</contrib-id><name-alternatives><name xml:lang="en"><surname>Kadnikov</surname><given-names>Leonid I.</given-names></name><name xml:lang="ru"><surname>Кадников</surname><given-names>Леонид Игоревич</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>MD, postgraduate student, Department of pharmacology and clinical pharmacology</p></bio><bio xml:lang="ru"><p>аспирант кафедры фармакологии и клинической фармакологии</p></bio><email>kadn-leonid@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-7826-9657</contrib-id><name-alternatives><name xml:lang="en"><surname>Izmozherova</surname><given-names>Nadezhda V.</given-names></name><name xml:lang="ru"><surname>Изможерова</surname><given-names>Надежда Владимировна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>MD, Dr. Sci. (Medicine), head of the Department of pharmacology and clinical pharmacology, leading researcher</p></bio><bio xml:lang="ru"><p>д. м. н., заведующая кафедрой фармакологии и клинической фармакологии, ведущий научный сотрудник</p></bio><email>nadezhda_izm@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/0000-0001-6216-2468</contrib-id><name-alternatives><name xml:lang="en"><surname>Popov</surname><given-names>Artem A.</given-names></name><name xml:lang="ru"><surname>Попов</surname><given-names>Артем Анатольевич</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>MD, Dr. Sci. (Medicine), head of the Department of hospital therapy and emergency medical care, leading researcher</p></bio><bio xml:lang="ru"><p>д. м. н., заведующий кафедрой госпитальной терапии и скорой медицинской помощи, ведущий научный сотрудник</p></bio><email>art_popov@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/0000-0002-9957-2505</contrib-id><name-alternatives><name xml:lang="en"><surname>Antropova</surname><given-names>Irina P.</given-names></name><name xml:lang="ru"><surname>Антропова</surname><given-names>Ирина Петровна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>MD, Dr. Sci. (Biology), leading researcher at the Central Research Department, leading researcher</p></bio><bio xml:lang="ru"><p>д. биол. н., ведущий научный сотрудник, ведущий научный сотрудник</p></bio><email>aip.hemolab@mail.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">Ural State Medical University of the Ministry of Healthcare of Russia</institution></aff><aff><institution xml:lang="ru">ФГБОУ ВО «Уральский государственный медицинский университет» Минздрава России</institution></aff></aff-alternatives><aff-alternatives id="aff2"><aff><institution xml:lang="en">Institute of High-Temperature Electrochemistry of Ural branch of the Russian Academy of Sciences</institution></aff><aff><institution xml:lang="ru">ФГБУН «Институт высокотемпературной электрохимии» Уральского отделения РАН</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2024-10-25" publication-format="electronic"><day>25</day><month>10</month><year>2024</year></pub-date><volume>10</volume><issue>7</issue><issue-title xml:lang="en"/><issue-title xml:lang="ru"/><fpage>43</fpage><lpage>49</lpage><history><date date-type="received" iso-8601-date="2024-10-24"><day>24</day><month>10</month><year>2024</year></date><date date-type="accepted" iso-8601-date="2024-10-24"><day>24</day><month>10</month><year>2024</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2024, Bionika Media</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2024, ООО «Бионика Медиа»</copyright-statement><copyright-year>2024</copyright-year><copyright-holder xml:lang="en">Bionika Media</copyright-holder><copyright-holder xml:lang="ru">ООО «Бионика Медиа»</copyright-holder></permissions><self-uri xlink:href="https://journals.eco-vector.com/2412-4036/article/view/637466">https://journals.eco-vector.com/2412-4036/article/view/637466</self-uri><abstract xml:lang="en"><p>Platelets play a special role in the occurrence of thrombosis in case of COVID-19, as they are involved in maintaining the integrity of blood vessels, regulating hemostasis, and in the process of inflammation.</p> <p><bold>The aim: </bold>to estimate the platelet component of hemostasis in patients with COVID-19.</p> <p><bold>Materials and methods. </bold>Case-control study included 75 patients: group 1 – with COVID-19 (n = 25), group 2 – with COVID-19 and acute coronary syndrome (ACS) (n = 25), group 3 – with ACS without COVID-19 (n = 25). Blood samples were analyzed by a Mindray BC-6800 Plus analyzer. Platelet aggregation with inducers was assessed using a ChronoLog 700 analyzer.</p> <p><bold>Results. </bold>Mean platelet volume (MPV) in group 1 was 11.0 (10.4 ÷ 11.9), in group 2 – 10.8 (10.3 ÷ 11.5), in group 3 – 10.2 (9.8 ÷ 10.7) fl (p &lt; 0.001). Platelet distribution width (PDW) in group 1 was 13.1 (12.0 ÷ 14.5), in group 2 – 12.4 (11.7 ÷ 14.4), in group 3 – 11.9 (11.2 ÷ 12.5) % (p = 0.028), large platelet coefficient (P-LCR) – 33.5 (28.0 ÷ 39.7), 31.7 (26.8 ÷ 37.3) and 27.2 (24.7 ÷ 29.8) %, respectively (p = 0.002). Ratio of the absolute platelet count to the absolute lymphocyte count (PLR) was as follows: in group 1 – 163.4 (100.8 ÷ 237.1), in group 2 – 131.2 (103.5 ÷ 173.1), in group 3 – 113.1 (78.7 ÷ 129.5) (p = 0.019). Platelet aggregation with adenosine diphosphate in group 1 was 61.0 (56.0 ÷ 66.0), in group 2 – 48.5 (28.0 ÷ 57.0), in group 3 – 28.0 (22.0 ÷ 39.0) % (p &lt; 0.001), platelet aggregation with collagen – 65.5 (61.5 ÷ 72.0), 57.0 (41.0 ÷ 67.5) and 54.0 (42.0 ÷ 57.0) %, respectively (p &lt; 0.001), and platelet aggregation with epinephrine – 58.8 (53.0 ÷ 65.0), 40.0 (24.5 ÷ 55.0) and 21.0 (15.0 ÷ 30.0) %, respectively (p &lt; 0.001).</p> <p><bold>Conclusion.</bold> Higher values of MPV, PDW, P-LCR, PLR, platelet aggregation with inducers indicate obvious activation and reactivity of platelets due to the immune-inflammatory component in individuals with COVID-19. Obtained data indicate a significant influence of SARS-CoV-2 at the functional activity of platelets.</p></abstract><trans-abstract xml:lang="ru"><p>Особая роль в возникновении тромбоза при COVID-19 отводится тромбоцитам, которые участвуют в обеспечении целостности сосудов, регуляции гемостаза, в процессе воспаления.</p> <p><bold>Цель </bold>– оценить тромбоцитарный компонент гемостаза у пациентов с COVID-19.</p> <p><bold>Материал и методы. </bold>В исследование «случай – контроль» были включены 75 пациентов: группа 1 – с COVID-19 (n = 25), группа 2 – с COVID-19 и острым коронарным синдромом (ОКС) (n = 25), группа 3 – с ОКС без COVID-19 (n =25). Образцы крови исследовались на анализаторе Mindray BC-6800 Plus. Агрегация тромбоцитов с индукторами оценивались с помощью анализатора ChronoLog 700.</p> <p><bold>Результаты.</bold> Средний объем тромбоцитов (MPV) в группе 1 составил 11,0 (10,4 ÷ 11,9), в группе 2 – 10,8 (10,3 ÷ 11,5), в группе 3 – 10,2 (9,8 ÷ 10,7) фл (p &lt; 0,001). Ширина распределения тромбоцитов (PDW) в группе 1 была равна 13,1 (12,0 ÷ 14,5), в группе 2 – 12,4 (11,7 ÷ 14,4), в группе 3 – 11,9 (11,2 ÷ 12,5) % (p = 0,028), коэффициент больших тромбоцитов (P-LCR) – 33,5 (28,0 ÷ 39,7), 31,7 (26,8 ÷ 37,3) и 27,2 (24,7 ÷ 29,8) % соответственно (p = 0,002). Отношение абсолютного количества тромбоцитов к абсолютному количеству лимфоцитов (PLR) было следующим: в группе 1 – 163,4 (100,8 ÷ 237,1), в группе 2 – 131,2 (103,5 ÷ 173,1), в группе 3 – 113,1 (78,7 ÷ 129,5) (p = 0,019). Агрегация тромбоцитов с аденозиндифосфатом в группе 1 составила 61,0 (56,0 ÷ 66,0), в группе 2 – 48,5 (28,0 ÷ 57,0), в группе 3 – 28,0 (22,0 ÷ 39,0) % (p &lt; 0,001), агрегация тромбоцитов с коллагеном – 65,5 (61,5 ÷ 72,0), 57,0 (41,0 ÷ 67,5) и 54,0 (42,0 ÷ 57,0) % соответственно (p &lt; 0,001), а агрегация тромбоцитов с эпинефрином – 58,8 (53,0 ÷ 65,0), 40,0 (24,5 ÷ 55,0) и 21,0 (15,0 ÷ 30,0) % соответственно (p &lt; 0,001).</p> <p><bold>Заключение. </bold>Более высокие значения MPV, PDW, P-LCR, PLR, агрегации тромбоцитов с индукторами указывают на выраженную активацию и реактивность тромбоцитов за счет иммуновоспалительного компонента у лиц с COVID-19. Полученные данные свидетельствуют о значимом влиянии SARS-CoV-2 на функциональную активность тромбоцитов.</p></trans-abstract><kwd-group xml:lang="en"><kwd>SARS-CoV-2</kwd><kwd>COVID-19</kwd><kwd>hemostasis</kwd><kwd>platelets</kwd><kwd>platelet indexes</kwd><kwd>acute coronary syndrome</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>SARS-CoV-2</kwd><kwd>COVID-19</kwd><kwd>гемостаз</kwd><kwd>тромбоциты</kwd><kwd>тромбоцитарные индексы</kwd><kwd>острый коронарный синдром</kwd></kwd-group><funding-group/></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Канаева Т.В., Кароли Н.А. Прогностические маркеры поражения сердечно-сосудистой системы у пациентов с COVID-19: обзор литературы. Сеченовский вестник. 2022; 13(3): 14–23. [Kanaeva T.V., Karoli N.A. Prognostic biomarkers for cardiovascular injury in patients with COVID-19: A review. 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