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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">morpho</journal-id><journal-title-group><journal-title xml:lang="ru">Морфологические ведомости</journal-title><trans-title-group xml:lang="en"><trans-title>Morphological newsletter</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">1812-3171</issn><issn pub-type="epub">2686-8741</issn><publisher><publisher-name>Private Medical University REAVIZ</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.20340/mv-mn.2025.33(4).983</article-id><article-id custom-type="elpub" pub-id-type="custom">morpho-983</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>ОРИГИНАЛЬНЫЕ ИССЛЕДОВАНИЯ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>RESEARCH ARTICLES</subject></subj-group></article-categories><title-group><article-title>МОРФОФУНКЦИОНАЛЬНЫЕ ОСОБЕННОСТИ ТУЧНЫХ КЛЕТОК В ОРГАНАХ ПИЩЕВАРИТЕЛЬНОЙ СИСТЕМЫ МОНГОЛЬСКИХ ПЕСЧАНОК ПОСЛЕ КОСМИЧЕСКОГО ПОЛЕТА</article-title><trans-title-group xml:lang="en"><trans-title>MORPHOFUNCTIONAL FEATURES OF MAST CELLS IN THE DIGESTIVE SYSTEM ORGANS OF MONGOLIAN GERBILS AFTER SPACE FLIGHT</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Бурцева</surname><given-names>Александра Станиславовна</given-names></name><name name-style="western" xml:lang="en"><surname>Burtseva</surname><given-names>Aleksandra S.</given-names></name></name-alternatives><bio xml:lang="ru"><p>кандидат медицинских наук, ассистент кафедры нормальной анатомии человека</p></bio><bio xml:lang="en"><p>Candidate of Medical Sciences, Assistant of the Department of Normal Human Anatomy</p></bio><email xlink:type="simple">burtseva-alex@rambler.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Алексеева</surname><given-names>Наталия Тимофеевна</given-names></name><name name-style="western" xml:lang="en"><surname>Alekseeva</surname><given-names>Nataliya T.</given-names></name></name-alternatives><bio xml:lang="ru"><p>профессор, доктор медицинских наук, заведующий кафедрой нормальной анатомии человека</p></bio><bio xml:lang="en"><p>Professor, Doctor of Medical Sciences, Head of the Department of Normal Human Anatomy </p></bio><email xlink:type="simple">alexeevant@list.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Кварацхелия</surname><given-names>Анна Гуладиевна</given-names></name><name name-style="western" xml:lang="en"><surname>Kvaratskheliya</surname><given-names>Anna G.</given-names></name></name-alternatives><bio xml:lang="ru"><p>доцент, кандидат биологических наук, доцент кафедры нормальной анатомии человека</p></bio><bio xml:lang="en"><p>Docent, Candidate of Biological Sciences, Associate Professor of the Department of Normal Human Anatomy </p></bio><email xlink:type="simple">anna_kvar_83@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Кокорева</surname><given-names>Татьяна Владимировна</given-names></name><name name-style="western" xml:lang="en"><surname>Kokoreva</surname><given-names>Tat'yana V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>кандидат медицинских наук, доцент кафедры анатомии человека</p></bio><bio xml:lang="en"><p>Candidate of Medical Sciences, Associate Professor of the Department of Human Anatomy</p></bio><email xlink:type="simple">burtseva-alex@rambler.ru</email><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Бахмет</surname><given-names>Анастасия Анатольевна</given-names></name><name name-style="western" xml:lang="en"><surname>Bakhmet</surname><given-names>Anastasiya A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>доцент, доктор медицинских наук, профессор кафедры анатомии человека института анатомии и морфологии имени академика Ю.М. Лопухина </p></bio><bio xml:lang="en"><p>Docent, Doctor of Medical Sci-ences, Professor of the Department of Human Anatomy of the Yu.M. Lopukhin Institute of Anatomy and Morphology</p></bio><email xlink:type="simple">burtseva-alex@rambler.ru</email><xref ref-type="aff" rid="aff-3"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Фетисов</surname><given-names>Сергей Олегович</given-names></name><name name-style="western" xml:lang="en"><surname>Fetisov</surname><given-names>Sergey O.</given-names></name></name-alternatives><bio xml:lang="ru"><p>кандидат биологических наук, ассистент кафедры нормальной анатомии человека</p></bio><bio xml:lang="en"><p>Candidate of Biological Sciences, Assistant Professor of the Department of Normal Human Anatomy </p></bio><email xlink:type="simple">fetisovbiol@yandex.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Воронежский государственный медицинский университет имени Н.Н. Бурденко, Воронеж</institution><country>Россия</country></aff><aff xml:lang="en"><institution>N.N. Burdenko Voronezh State Medical University, Voronez</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Российский университет дружбы народа им. Патриса Лумумбы, Москва</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Patrice Lumumba Russian People's Friendship University, Moscow</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-3"><aff xml:lang="ru"><institution>Российский национальный исследовательский медицинский университет им. Н.И. Пирогова, Москва, Россия</institution><country>Россия</country></aff><aff xml:lang="en"><institution>N.I. Pirogov Russian National Research Medical University, Moscow</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2025</year></pub-date><pub-date pub-type="epub"><day>28</day><month>01</month><year>2026</year></pub-date><volume>33</volume><issue>4</issue><elocation-id>id-983</elocation-id><permissions><copyright-statement>Copyright &amp;#x00A9; Бурцева А.С., Алексеева Н.Т., Кварацхелия А.Г., Кокорева Т.В., Бахмет А.А., Фетисов С.О., 2026</copyright-statement><copyright-year>2026</copyright-year><copyright-holder xml:lang="ru">Бурцева А.С., Алексеева Н.Т., Кварацхелия А.Г., Кокорева Т.В., Бахмет А.А., Фетисов С.О.</copyright-holder><copyright-holder xml:lang="en">Burtseva A.S., Alekseeva N.T., Kvaratskheliya A.G., Kokoreva T.V., Bakhmet A.A., Fetisov S.O.</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.morpholetter.com/jour/article/view/983">https://www.morpholetter.com/jour/article/view/983</self-uri><abstract><p>Актуальность. Пищеварительная система является одной из основных систем, обеспечивающих жизнедеятельность организма. Оценка структурно-функциональных изменений в органах этой системы имеет важное значение для выявления компенсаторно-приспособительных реакций организма при воздействии факторов космического полёта. Тучные клетки играют ключевую роль в регуляции местного гомеостаза и адаптационных процессах, однако их морфофункциональное состояние при воздействии невесомости остаётся недостаточно изученным.Цель исследования: изучить морфофункциональные особенности тучных клеток в органах пищеварительной системы монгольских песчанок после орбитального полёта.Материалы и методы. Эксперимент выполнен на монгольских песчанках Meriones unguiculatus (самцах) в рамках научно-исследовательского проекта космического аппарата «Фотон-М» №3 (полёт 14–26 сентября 2007 г.). Сформированы три группы животных: полётная группа (n=не указано), группа синхронного наземного эксперимента в маке-те полётной аппаратуры, группа виварийного контроля. Дополнительно проведён 12-суточный наземный эксперимент по антиортостатическому вывешиванию по методике Ильина-Новикова в модификации Морей-Холтон. Фрагменты фундального отдела желудка фиксировали в 10% нейтральном формалине, часть материала – в формалине с 0,5% цетилпиридинхлоридом. Использованы гистохимические (окраска толуидиновым синим, определение актив-ности хлорацетатэстеразы) и иммуногистохимические методы (выявление триптазы, химазы, c-Kit/CD117). Раздельно изучали субпопуляцию мукозных тучных клеток слизистой оболочки и соединительнотканных тучных клеток других оболочек.Результаты. У контрольных животных основная масса тучных клеток локализовалась в слизистой оболочке желудка, преимущественно в нижней трети желёз. Синхронный эксперимент показал увеличение частоты обнаружения тучных клеток в верхней трети слизистой оболочки и усиление процессов дегрануляции. После космического полёта наблюдалось снижение общего количества метахроматичных и триптаза-позитивных тучных клеток в слизистой оболочке, но увеличение численности хлорацетатэстераза-позитивных, химазапозитивных и CD117+ клеток. Усиливалась экспрессия химазы, особенно выраженная в слизистой оболочке. Активизировались процессы секреции с увеличением доли тучных клеток в состоянии экзоцитоза и лизиса гранул. При антиортостатическом вывешивании отмечено увеличение численности тучных клеток во всех слоях желудка, усиление экспрессии химазы и активизация механизмов секреции.Заключение. Факторы космического полёта и моделирование эффектов невесомости вызывают значительные изменения в популяции тучных клеток желудка монгольских песчанок, проявляющиеся перераспределением субпопуляций, изменением протеазного профиля с усилением экспрессии химазы, активизацией секреторной активности и миграцией CD117-позитивных клеток-предшественников. Эти изменения отражают активное участие тучных клеток в адаптационных процессах пищеварительной системы к условиям космического полёта.</p></abstract><trans-abstract xml:lang="en"><sec><title>Background</title><p>Background. The digestive system is one of the main systems ensuring vital activity of the organism. Assessment of structural and functional changes in the organs of this system is important for identifying compensatory-adaptive reactions during space flight. Mast cells play a key role in regulating local homeostasis and adaptive processes; however, their morphofunctional state under weightlessness remains insufficiently studied.</p></sec><sec><title>Aim</title><p>Aim. To study the morphofunctional features of mast cells in the digestive system organs of Mongolian gerbils after orbital flight.</p></sec><sec><title>Materials and Methods</title><p>Materials and Methods. The experiment was performed on male Mongolian gerbils Meriones unguiculatus as part of the Foton-M No. 3 spacecraft research project (flight September 14–26, 2007). Three groups of animals were formed: flight group, synchronous ground experiment group in flight equipment mockup, and vivarium control group. Additionally, a 12-day ground experiment with antiorthostatic suspension using the Ilyin-Novikov method in the Morey-Holton modification was conducted. Fragments of the fundal stomach were fixed in 10% neutral formalin, with some material fixed in formalin containing 0.5% cetylpyridinium chloride. Histochemical (toluidine blue staining, chloroacetate esterase activity determination) and immunohistochemical methods (detection of tryptase, chymase, c-Kit/CD117) were used. Mucosal and connective tissue mast cell subpopulations were studied separately.</p></sec><sec><title>Results</title><p>Results. In control animals, the main mass of mast cells was localized in the gastric mucosa, predominantly in the lower third of the glands. The synchronous experiment showed increased frequency of mast cell detection in the upper third of the mucosa and enhanced degranulation processes. After space flight, a decrease in the total number of metachromatic and tryptase-positive mast cells in the mucosa was observed, but an increase in chloroacetate esterase-positive, chymase-positive, and CD117+ cells occurred. Chymase expression was enhanced, particularly pronounced in the mucosa. Secretory processes were activated with an increase in the proportion of mast cells in the state of exocytosis and granule lysis. During antiorthostatic suspension, an increase in mast cell numbers in all stomach layers, enhanced chymase expression, and activation of secretory mechanisms were noted.</p></sec><sec><title>Conclusion</title><p>Conclusion. Space flight factors and simulation of weightlessness effects cause significant changes in the mast cell population of Mongolian gerbil stomach, manifested by subpopulation redistribution, changes in protease profile with enhanced chymase expression, activation of secretory activity, and migration of CD117-positive progenitor cells. These changes reflect active participation of mast cells in adaptive processes of the digestive system to space flight conditions.</p></sec></trans-abstract><kwd-group xml:lang="ru"><kwd>космический полёт</kwd><kwd>невесомость</kwd><kwd>тучные клетки</kwd><kwd>желудок</kwd><kwd>монгольские песчанки</kwd><kwd>химаза</kwd><kwd>триптаза</kwd><kwd>CD117</kwd></kwd-group><kwd-group xml:lang="en"><kwd>space flight</kwd><kwd>weightlessness</kwd><kwd>mast cells</kwd><kwd>stomach</kwd><kwd>Mongolian gerbils</kwd><kwd>chymase</kwd><kwd>tryptase</kwd><kwd>CD117</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">Lebedeva MA, Medvedeva YS, Baranov MV i dr. Dolgovremennaya dinamika funktsional'nogo sostoyaniya organizma krys posle sochetannogo vozdeistviya faktorov kosmicheskogo poleta v nazemnom eksperimente. Patogenez. 2024;22(1):56-65. 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