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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">Morphology</journal-id><journal-title-group><journal-title xml:lang="en">Morphology</journal-title><trans-title-group xml:lang="ru"><trans-title>Морфология</trans-title></trans-title-group></journal-title-group><issn publication-format="print">1026-3543</issn><issn publication-format="electronic">2949-2556</issn><publisher><publisher-name xml:lang="en">Eco-Vector</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">398605</article-id><article-id pub-id-type="doi">10.17816/morph.398605</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>Articles</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>Статьи</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">REACTIVE MICROGLIAL CHANGES IN RAT NEOCORTEX AND HIPPOCAMPUS AFTER EXPOSURE TO ACUTE PERINATAL HYPOXIA</article-title><trans-title-group xml:lang="ru"><trans-title>РЕАКТИВНЫЕ ИЗМЕНЕНИЯ МИКРОГЛИИ В НЕОКОРТЕКСЕ И ГИППОКАМПЕ У КРЫС ПОСЛЕ ВОЗДЕЙСТВИЯ ОСТРОЙ ПЕРИНАТАЛЬНОЙ ГИПОКСИИ</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Khozhai</surname><given-names>L. I.</given-names></name><name xml:lang="ru"><surname>Хожай</surname><given-names>Людмила Ивановна</given-names></name></name-alternatives><bio xml:lang="ru"><p>лаборатория онтогенеза нервной системы</p></bio><email>astarta0505@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Otellin</surname><given-names>V. A.</given-names></name><name xml:lang="ru"><surname>Отеллин</surname><given-names>Владимир Александрович</given-names></name></name-alternatives><bio xml:lang="ru"><p>лаборатория онтогенеза нервной системы</p></bio><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">RAS I. P. Pavlov Institute of Physiology</institution></aff><aff><institution xml:lang="ru">Институт физиологии им. И. П. Павлова РАН</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2013-02-15" publication-format="electronic"><day>15</day><month>02</month><year>2013</year></pub-date><volume>143</volume><issue>1</issue><issue-title xml:lang="en">VOL 143, NO1 (2013)</issue-title><issue-title xml:lang="ru">ТОМ 143, №1 (2013)</issue-title><fpage>023</fpage><lpage>027</lpage><history><date date-type="received" iso-8601-date="2023-05-09"><day>09</day><month>05</month><year>2023</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2013, Eco-Vector</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2013, Эко-Вектор</copyright-statement><copyright-year>2013</copyright-year><copyright-holder xml:lang="en">Eco-Vector</copyright-holder><copyright-holder xml:lang="ru">Эко-Вектор</copyright-holder><ali:free_to_read xmlns:ali="http://www.niso.org/schemas/ali/1.0/"/></permissions><self-uri xlink:href="https://j-morphology.com/1026-3543/article/view/398605">https://j-morphology.com/1026-3543/article/view/398605</self-uri><abstract xml:lang="en"><p>The dynamics of reactive changes of a population density of microglial cells and the reversibility of their phenotypic forms were studied in the brain of neonatal rats at different time intervals after1 hr-long exposure to acute normobaric hypoxia in the pressure chamber at the second postnatal day. Different areas of the neocortex (frontal, motor, somatosensory and visual) and of the hippocampus (СА1, СА3, СА4 and fascia dentata) were examined 1 hr, 3 hrs, 1 and 5 days after exposure to hypoxia. Microglial cells were demonstrated using an immunocytochemical staining with the monoclonal antibodies against Iba-1 antigen. The results have shown that the reaction of microglia to acute hypoxia in both the neocortex and the hippocampus of the newborns developed simultaneously and synchronously with the augmentation of cell death. The increase of a population density of amoeboid form of microglial cells in the brain areas studied was recorded already after 1 hour as a result of their migration from the subventricular region and the areas adjacent to large vessels from where they practically disappeared. The number of amoeboid microglial cells in this area has recovered rather quickly (in 3 hrs). The population density of microglial cells, especially of amoeboid forms, sharply increased with the augmentation of cell death and remained unchanged for about 5 days.</p></abstract><trans-abstract xml:lang="ru"><p>Изучены динамика реактивного изменения плотности популяции микроглиоцитов и обратимость их фенотипических форм в мозгу новорожденных крыс в разные сроки после воздействия острой нормобарической гипоксии в барокамере в течение 1 ч на 2-е постнатальные сутки. Исследовали разные области неокортекса (фронтальную, моторную, соматосенсорную и зрительную) и отделы гиппокампа (поля СА1, СА3, СА4 и зубчатую извилину) через 1 и 3 ч, 1 и 5 сут после воздействия гипоксии. Микроглиоциты выявляли иммуноцитохимически с использованием поликлональных антител к антигену Iba-1. Результаты показали, что реакция микроглии на воздействие острой гипоксии в неокортексе и гиппокампе у новорожденных развивается одновременно и синхронно с увеличением клеточной гибели. Повышение плотности популяции микроглиоцитов амебоидной формы в исследованных отделах мозга происходит уже через 1 ч в результате их миграции из субвентрикулярной зоны и областей, прилежащих к крупным сосудам, где они практически исчезают. Довольно быстро (через 3 ч) численность амебоидных микроглиоцитов здесь восстанавливается. Плотность популяции микроглиоцитов, особенно амебоидной формы, резко повышается с увеличением гибели клеток и сохраняется до 5 сут.</p></trans-abstract><kwd-group xml:lang="en"><kwd>neocortex</kwd><kwd>hippocampus</kwd><kwd>microglia</kwd><kwd>acute perinatal hypoxia</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>неокортекс</kwd><kwd>микроглия</kwd><kwd>гиппокамп</kwd><kwd>острая перинатальная гипоксия</kwd></kwd-group></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Коржевский Д. Э., Григорьев И. П. и Отеллин В. А. 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