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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">vestib</journal-id><journal-title-group><journal-title xml:lang="ru">Известия Национальной  академии наук Беларуси. Серия биологических наук</journal-title><trans-title-group xml:lang="en"><trans-title>Proceedings of the National Academy of Sciences of Belarus, Biological Series</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">1029-8940</issn><issn pub-type="epub">2524-230X</issn><publisher><publisher-name>The Republican Unitary Enterprise Publishing House "Belaruskaya Navuka"</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.29235/1029-8940-2020-65-4-489-496</article-id><article-id custom-type="elpub" pub-id-type="custom">vestib-712</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>Статьи</subject></subj-group></article-categories><title-group><article-title>Динамика гистологических изменений гистаминергических нейронов гипоталамуса крысы в постнатальном онтогенезе</article-title><trans-title-group xml:lang="en"><trans-title>Dynamics of histological changes in histaminergic neurons of the rat hypothalamus in postnatal ontogenesis</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>Заерко</surname><given-names>А. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Zaerko</surname><given-names>A. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Заерко Анастасия Викторовна - аспирант.</p><p>Ул. Горького, 80, 230009, Гродно</p></bio><bio xml:lang="en"><p>Anastasiya V. Zaerko - Postgraduate student.</p><p>80, Gorky Str., 230015, Grodno</p></bio><email xlink:type="simple">wersall_91@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>Федина</surname><given-names>Е. М.</given-names></name><name name-style="western" xml:lang="en"><surname>Phedina</surname><given-names>K. M.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Федина Екатерина Михайловна - кандидат биологических наук, доцент.</p><p>Ул. Горького, 80, 230009, Гродно</p></bio><bio xml:lang="en"><p>Katsiaryna M. Phedina - Ph. D. (Biol.), Assistant Professor.</p><p>80, Gorky Str., 230015, Grodno</p></bio><email xlink:type="simple">phedina.katerina@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>Зиматкин</surname><given-names>С. М.</given-names></name><name name-style="western" xml:lang="en"><surname>Zimatkin</surname><given-names>S. M.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Зиматкин Сергей Михайлович - доктор биологических наук, профессор, заведующий кафедрой.</p><p>Ул. Горького, 80, 230009, Гродно</p></bio><bio xml:lang="en"><p>Sergey M. Zimatkin - D. Sc. (Biol.), Professor, Head of the Department.</p><p>80, Gorky Str., 230015, Grodno</p></bio><email xlink:type="simple">smzimatkin@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Гродненский государственный медицинский университет</institution></aff><aff xml:lang="en"><institution>Grodno State Medical University</institution></aff></aff-alternatives><pub-date pub-type="collection"><year>2020</year></pub-date><pub-date pub-type="epub"><day>05</day><month>11</month><year>2020</year></pub-date><volume>65</volume><issue>4</issue><fpage>489</fpage><lpage>496</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Заерко А.В., Федина Е.М., Зиматкин С.М., 2020</copyright-statement><copyright-year>2020</copyright-year><copyright-holder xml:lang="ru">Заерко А.В., Федина Е.М., Зиматкин С.М.</copyright-holder><copyright-holder xml:lang="en">Zaerko A.V., Phedina K.M., Zimatkin S.M.</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://vestibio.belnauka.by/jour/article/view/712">https://vestibio.belnauka.by/jour/article/view/712</self-uri><abstract><p>Гистаминергическая система мозга играет важную роль в регуляции многих функций, систем и реакций организма, а также в патогенезе многих патологических состояний и заболеваний. В литературе подробно описаны гистаминергические нейроны гипоталамуса у взрослых животных в норме и при некоторых патологических состояниях. Вместе с тем изучение развития этих нейронов в динамике постнатального онтогенеза не проводилось.</p><p>В работе оценено морфофункциональное состояние гистаминергических нейронов ядра Е2 гипоталамуса в динамике постнатального онтогенеза. Исследование выполнено на потомстве беспородных белых крыс (45 животных). Декапитация крысят осуществлялась на 5, 10, 20, 45 и 90-е сутки после рождения. В работе использовали гистологический, гистохимический, морфометрический и статистический методы исследования. Полученные данные обрабатывали методами непараметрической статистики.</p><p>Установлено, что с 5-х по 90-е сутки постнатального онтогенеза крыс происходит значительное увеличение размеров перикарионов гистаминергических нейронов ядра Е2 гипоталамуса (особенно с 5-х по 10-е сутки). Это сопровождается уменьшением плотности расположения тел исследуемых клеток и увеличением расстояния между ними (особенно с 5-х по 20-е сутки), что свидетельствует об интенсивном росте нейропиля. В указанные сроки постнатального развития наблюдается значительное снижение количества гиперхромных нейронов, что совпадает с уменьшением содержания рибонуклеопротеинов в цитоплазме описываемых нейроцитов.</p><p>Таким образом, описанный выше этап постнатального развития гистаминергических нейронов мозга крысы в целом характеризуется интенсивным ростом их перикарионов, уменьшением плотности их расположения и стабилизацией морфофункционального состояния исследуемых нейроцитов.</p></abstract><trans-abstract xml:lang="en"><p>Histaminergic neurons in adult vertebrate brain are confined to the posterior hypothalamic area, where they are comprised of scattered groups of neurons referred to as the tuberomammillary nucleus. Histamine regulates hormonal functions, sleep, food intake, thermoregulation and locomotor activity. Histaminergic neurons in adult animals under normal conditions and in some pathological conditions are described. However, a study of these neurons development in the postnatal ontogenesis dynamics has not been conducted.</p><p>The morphofunctional state of histaminergic neurons of the hypothalamic E2 nucleus in the postnatal ontogenesis dynamics was assessed. The study was performed on the offspring of outbred white rats (45 animals). The decapitation of animals was carried out on the 5, 10, 20, 45 and 90th days after birth. We used histological, histochemical, morphometric and statistical research methods. The data obtained were processed by nonparametric statistics methods.</p><p>From the 5th to the 90th day of rat postnatal ontogenesis, there is a significant increase in the size of the histaminergic neurons pericarions of the hypothalamic E2 nucleus (especially from the 5th to the 10th day). It is accompanied by a decrease in the bodies location density of the studied cells and an increase in the distance between them (especially from the 5th to the 20th day), which indicates a neuropil intensive growth. Over the indicated period of postnatal development, a significant decrease in the hyperchromic neurons number is observed, which correspond to a decrease in the ribonucleoproteins amount in the cytoplasm of the described neurocytes.</p><p>Development of brain histaminergic neurons from the 5th to the 90th day of rat postnatal ontogenesis is characterized by an intensive growth of their pericaryons, a decrease in their location density and stabilization of the morphofunctional state of the studied neurocytes.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>гистаминергические нейроны</kwd><kwd>гипоталамус</kwd><kwd>постнатальное развитие</kwd><kwd>морфометрия</kwd><kwd>хроматофилия</kwd></kwd-group><kwd-group xml:lang="en"><kwd>histaminergic neurons</kwd><kwd>hypothalamus</kwd><kwd>postnatal development</kwd><kwd>morphometric analysis</kwd><kwd>chromatophilia</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Работа выполнена при поддержке Белорусского республиканского фонда фундаментальных исследований (М20М-089)</funding-statement><funding-statement xml:lang="en">This work was supported by the Belarusian Republican Foundation for Basic Research (M20M-089)</funding-statement></funding-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Haas, H. 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