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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">mvjr</journal-id><journal-title-group><journal-title xml:lang="ru">Медицинский вестник Юга России</journal-title><trans-title-group xml:lang="en"><trans-title>Medical Herald of the South of Russia</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2219-8075</issn><issn pub-type="epub">2618-7876</issn><publisher><publisher-name>The Rostov State Medical University</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.21886/2219-8075-2021-12-4-108-115</article-id><article-id custom-type="elpub" pub-id-type="custom">mvjr-1399</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>КЛИНИЧЕСКАЯ ИММУНОЛОГИЯ, АЛЛЕРГОЛОГИЯ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>CLINICAL IMMUNOLOGY, ALLERGOLOGY</subject></subj-group></article-categories><title-group><article-title>Клинико-иммунологическая характеристика среднетяжёлых форм COVID-19 при различных уровнях маркера тканевой деструкции (лактатдегидрогеназы)</article-title><trans-title-group xml:lang="en"><trans-title>Clinical and immunological characteristics of moderate-to-severe forms of COVID-19 at different levels of the tissue damage marker (lactate dehydrogenase)</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-5716-4397</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Сизякина</surname><given-names>Л. П.</given-names></name><name name-style="western" xml:lang="en"><surname>Sizyakinа</surname><given-names>I. P.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Сизякина Людмила Петровна, доктор медицинских наук, профессор, заведющая кафедрой клинической иммунологии и аллергологии,</p><p>Ростов-на-Дону</p></bio><bio xml:lang="en"><p>Lyudmila P. Sizyakina, Dr. Sci. (Med.), Professor, head of the Department of Clinical Immunology and Allergology</p><p>Rostov-on-Don</p></bio><email xlink:type="simple">msiziakina@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-0837-1538</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Закурская</surname><given-names>В. Я.</given-names></name><name name-style="western" xml:lang="en"><surname>Zakurskayа</surname><given-names>V. Ya.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Закурская Вита Яковлевна, ассистент кафедры клинической иммунологии и аллергологии</p><p>Ростов-на-Дону</p></bio><bio xml:lang="en"><p>Vita Ya. Zakurskaya, Assistant of the Department of Clinical Immunology and Allergology</p><p>Rostov-on-Don</p></bio><email xlink:type="simple">vias.92@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-0165-6805</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Скрипкина</surname><given-names>Н. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Skripkinа</surname><given-names>N. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Скрипкина Надежда Анатольевна, врач-инфекционист моноинфекционного госпиталя №1</p><p>Ростов-на-Дону</p></bio><bio xml:lang="en"><p>Nadezhda A. Skripkina, Infectious Disease Specialist at the monoinfective Hospital №1</p><p>Rostov-on-Don</p></bio><email xlink:type="simple">pers_348@mail.ru</email><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-4580-0020</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Антонова</surname><given-names>Е. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Antonova</surname><given-names>E. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Антонова Елена Алексеевна, начальник отдела качества лабораторных исследований</p><p>Ростов-на-Дону</p></bio><bio xml:lang="en"><p>Elena A. Antonova, Head of the Laboratory Research Quality Department</p><p>Rostov-on-Don</p></bio><email xlink:type="simple">antonova.lab@gb-1.ru</email><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-7125-1374</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Сизякин</surname><given-names>Д. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Sizyakin</surname><given-names>D. B.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Сизякин Дмитрий Владимирович, доктор медицинских наук, проф., профессор кафедры урологии, Ростовский государственный медицинский университет; главный врач Городской больницы №1 им. Н.А. Семашко</p><p>Ростов-на-Дону</p></bio><bio xml:lang="en"><p>Dmitry V. Sizyakin, Dr. Sci. (Med.), Professor, Professor of the Department of urology, Rostov State Medical University; head of the Semashko City Hospital №1</p><p>Rostov-on-Don</p></bio><email xlink:type="simple">center@gb-1.ru</email><xref ref-type="aff" rid="aff-3"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Ростовский государственный медицинский университет</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Rostov State Medical University</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Городская больница №1 им. Н.А. Семашко</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Semashko City Hospital No.1</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-3"><aff xml:lang="ru"><institution>Ростовский государственный медицинский университет;&#13;
Городская больница №1 им. Н.А. Семашко</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Rostov State Medical University;&#13;
Semashko City Hospital No.1</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2021</year></pub-date><pub-date pub-type="epub"><day>25</day><month>12</month><year>2021</year></pub-date><volume>12</volume><issue>4</issue><fpage>108</fpage><lpage>115</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Сизякина Л.П., Закурская В.Я., Скрипкина Н.А., Антонова Е.А., Сизякин Д.В., 2021</copyright-statement><copyright-year>2021</copyright-year><copyright-holder xml:lang="ru">Сизякина Л.П., Закурская В.Я., Скрипкина Н.А., Антонова Е.А., Сизякин Д.В.</copyright-holder><copyright-holder xml:lang="en">Sizyakinа I.P., Zakurskayа V.Y., Skripkinа N.A., Antonova E.A., Sizyakin D.B.</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.medicalherald.ru/jour/article/view/1399">https://www.medicalherald.ru/jour/article/view/1399</self-uri><abstract><sec><title>Цель</title><p>Цель: изучение особенностей иммунного статуса у пациентов со среднетяжёлым вариантом течения COVID-19 в зависимости от разных уровней лактатдегидрогеназы крови.</p></sec><sec><title>Материалы и методы</title><p>Материалы и методы: обследованы 24 пациента со среднетяжёлой формой инфекции СOVID-19. Группа сравнения — 21 здоровый доброволец. Методы — клинический, параклинический (компьютерная томография лёгких; оценка общего анализа крови, биохимических показателей; иммунологические исследования), статистический.</p></sec><sec><title>Результаты</title><p>Результаты: изменения в общеклиническом и биохимическом анализах крови у больных среднетяжёлыми формами COVID-19 проявляются гранулоцитозом, лимфопенией, моноцитопенией и повышением уровня С-реактивного белка, лактатдегидрогеназы с одновременным снижением содержания общего белка. У пациентов с высоким уровнем лактатдегидрогеназы выявлено перераспределение популяций лимфоцитов в сторону В-лимфоцитов при снижении общего числа Т-клеток. При этом отмечено снижение антителопродукции иммуноглобулинов класса M и G и одновременное усиление синтеза IgA.</p></sec><sec><title>Выводы</title><p>Выводы: рост содержания ЛДГ в крови у больных COVID-19 ассоциирован со снижением содержания Т-лимфоцитов, обусловленным выраженной лимфопенией и одновременным ростом содержания В-лимфоцитов без адекватного усиления их функции антителопродукции.</p></sec><sec><title> </title><p> </p></sec></abstract><trans-abstract xml:lang="en"><sec><title>Objective</title><p>Objective: To study the features of the immune status in patients with a moderate-to-severe course of COVID-19, depending the levels of blood lactate dehydrogenase.</p></sec><sec><title>Materials and Methods</title><p>Materials and Methods: A total of 24 patients with a moderate-to-severe form of COVID-19 were examined. The control group consisted of 21 healthy volunteers. Methods: clinical, paraclinical (computed tomography of the lungs; complete blood count, blood biochemistry; immunological studies), statistical.</p></sec><sec><title>Results</title><p>Results: Changes in complete blood count and blood biochemistry in patients with moderate-to-severe COVID-19 consist in granulocytosis, lymphopenia, monocytopenia, and an increase in the level of C-reactive protein, lactate dehydrogenase, with a simultaneous decrease in the total protein content. In patients with high levels of lactate dehydrogenase, a redistribution of lymphocyte populations towards B-cells was revealed with a decrease in the total number of T-cells. At the same time, there was a decrease in the production of IgM and IgG and a simultaneous increase in the synthesis of IgA.</p></sec><sec><title>Conclusions</title><p>Conclusions: The increase in blood LDH in COVID-19 patients is associated with a decrease in the content of T-cells due to severe lymphopenia, and a simultaneous increase in the content of B-cells without adequate enhancement of their antibody production function.</p></sec></trans-abstract><kwd-group xml:lang="ru"><kwd>коронавирусная инфекция</kwd><kwd>лактатдегидрогеназа</kwd><kwd>COVID-19</kwd></kwd-group><kwd-group xml:lang="en"><kwd>coronavirus infection</kwd><kwd>lactate dehydrogenase</kwd><kwd>COVID-19</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">Новый коронавирус COVID-19 (SARS-CoV-2). Детские инфекции. 2020;19(1):5-6. 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