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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">677905</article-id><article-id pub-id-type="doi">10.17816/morph.677905</article-id><article-id pub-id-type="edn">GICHGI</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>Original Study Articles</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">Morphometric characteristics of intramural autonomic nerve ganglia of the myenteric and submucosal plexuses of the small and large intestines in rats during postnatal ontogenesis</article-title><trans-title-group xml:lang="ru"><trans-title>Морфометрические особенности интрамуральных автономных нервных ганглиев межмышечного и подслизистого сплетений тонкой и толстой кишки крыс в постнатальном онтогенезе</trans-title></trans-title-group><trans-title-group xml:lang="zh"><trans-title>大鼠小肠和结肠壁内自主神经节在出生后个体发育中的形态计量学特征</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-6230-5024</contrib-id><contrib-id contrib-id-type="spin">7676-0849</contrib-id><name-alternatives><name xml:lang="en"><surname>Masliukov</surname><given-names>Petr M.</given-names></name><name xml:lang="ru"><surname>Маслюков</surname><given-names>Петр Михайлович</given-names></name><name xml:lang="zh"><surname>Masliukov</surname><given-names>Petr M.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Dr. Sci. (Medicine), Professor</p></bio><bio xml:lang="ru"><p>д-р мед. наук, профессор</p></bio><bio xml:lang="zh"><p>Dr. Sci. (Medicine), Professor</p></bio><email>mpm@ysmu.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-3333-5865</contrib-id><contrib-id contrib-id-type="spin">3691-4817</contrib-id><name-alternatives><name xml:lang="en"><surname>Budnik</surname><given-names>Antonina F.</given-names></name><name xml:lang="ru"><surname>Будник</surname><given-names>Антонина Францевна</given-names></name><name xml:lang="zh"><surname>Budnik</surname><given-names>Antonina F.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Cand. Sci. (Medicine), Assistant Professor</p></bio><bio xml:lang="ru"><p>канд. мед. наук, доцент</p></bio><bio xml:lang="zh"><p>Cand. Sci. (Medicine), Assistant Professor</p></bio><email>budnik74@mail.ru</email><xref ref-type="aff" rid="aff2"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Yaroslavl State Medical University</institution></aff><aff><institution xml:lang="ru">Ярославский государственный медицинский университет</institution></aff><aff><institution xml:lang="zh">Yaroslavl State Medical University</institution></aff></aff-alternatives><aff-alternatives id="aff2"><aff><institution xml:lang="en">Kabardino-Balkarian State University</institution></aff><aff><institution xml:lang="ru">Кабардино-Балкарский государственный университет им. Х.М. Бербекова</institution></aff><aff><institution xml:lang="zh">Kabardino-Balkarian State University</institution></aff></aff-alternatives><pub-date date-type="preprint" iso-8601-date="2025-08-17" publication-format="electronic"><day>17</day><month>08</month><year>2025</year></pub-date><pub-date date-type="pub" iso-8601-date="2025-10-23" publication-format="electronic"><day>23</day><month>10</month><year>2025</year></pub-date><volume>163</volume><issue>4</issue><issue-title xml:lang="en"/><issue-title xml:lang="ru"/><issue-title xml:lang="zh"/><fpage>305</fpage><lpage>315</lpage><history><date date-type="received" iso-8601-date="2025-04-06"><day>06</day><month>04</month><year>2025</year></date><date date-type="accepted" iso-8601-date="2025-05-08"><day>08</day><month>05</month><year>2025</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2025, Eco-Vector</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2025, Эко-Вектор</copyright-statement><copyright-statement xml:lang="zh">Copyright ©; 2025,</copyright-statement><copyright-year>2025</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/" start_date="2028-10-23"/><license><ali:license_ref xmlns:ali="http://www.niso.org/schemas/ali/1.0/">https://eco-vector.com/for_authors.php#07</ali:license_ref></license></permissions><self-uri xlink:href="https://j-morphology.com/1026-3543/article/view/677905">https://j-morphology.com/1026-3543/article/view/677905</self-uri><abstract xml:lang="en"><p><bold>BACKGROUND:</bold> The morphology of intramural autonomic nerve ganglia of the myenteric (MP) and submucosal (SP) plexuses of the intestine in adult animals has been studied in sufficient detail, whereas data on age-related features of these structures remain limited.</p> <p><bold>AIM: </bold>This study aimed to investigate the morphometric characteristics of intramural autonomic nerve ganglia of the myenteric and submucosal plexuses of the small and large intestines in rats during postnatal ontogenesis.</p> <p><bold>METHODS:</bold> The study used male Wistar rats of different age groups: newborns; 10, 20, 30, and 60 days after birth; and 12 and 24 months of age. Immunohistochemical analysis was performed using fluorescently labeled antibodies to protein gene product 9.5 (PGP9.5).</p> <p><bold>RESULTS:</bold> During postnatal ontogenesis, the number of ganglia per 1 mm<sup>2</sup> decreases, whereas the ganglion area increases in both the small and large intestines. The mean area of nerve ganglia in the MP of the small and large intestines increases from birth up to day 60, whereas in the SP, this increase occurs during the first 30 days of life. The mean density of ganglia per 1 mm<sup>2</sup> in the MP decreases during the first 60 days in the small intestine and during 12 months in the large intestine. In the SP, this parameter decreased in both the small and large intestines during the first 60 days of life. The mean number of PGP9.5-immunoreactive neurons per ganglion in the MP remains unchanged during postnatal ontogenesis, whereas in the SP, it increases during the first 10 days after birth.</p> <p><bold>CONCLUSION: </bold>In postnatal ontogenesis, during the first 30 days of life, the size of ganglia in the MP and SP increases, whereas their density per unit surface of the small and large intestines decreases. The shape of ganglia and the number of neurons in the MP ganglia do not change during postnatal ontogenesis. In contrast to the MP of the small and large intestines in rats, the SP ganglia remain immature at birth, with the formation of the SP ganglion network during the first 10 days after birth.</p></abstract><trans-abstract xml:lang="ru"><p><bold>Обоснование. </bold>Морфология интрамуральных автономных нервных ганглиев межмышечного (МС) и подслизистого (ПС) сплетений кишки у половозрелых животных изучена достаточно подробно, тогда как данных о возрастных особенностях этих структур в современной литературе недостаточно.</p> <p><bold>Цель</bold> — исследовать морфометрические характеристики интрамуральных автономных нервных узлов межмышечного и подслизистого сплетений в тонкой и толстой кишке у крыс в постнатальном онтогенезе.</p> <p><bold>Методы.</bold> Работа выполнена на самцах крыс линии Wistar разных возрастных групп: новорождённых, на 10, 20, 30, 60-е сутки после рождения, а также в возрасте 12 и 24 месяца. В работе использовали иммуногистохимический анализ с флуоресцентными меченными антителами к протеиновому генному продукту 9,5 (PGP9.5).</p> <p><bold>Результаты. </bold>В постнатальном онтогенезе происходит снижение числа ганглиев на 1 мм<sup>2</sup> и увеличение площади ганглиев в тонкой и толстой кишке. Средняя площадь нервных узлов в МС тонкой и толстой кишки возрастает с момента рождения вплоть до 60-х суток, а в ПС — в первые 30 суток жизни. Средняя плотность расположения нервных узлов на 1 мм<sup>2</sup> уменьшается в МС: в тонкой кишке в первые 60 суток, а в толстой — на протяжении 12 месяцев. Данный показатель в ПС снижается и в тонкой, и в толстой кишке в первые 60 суток жизни. Среднее число PGP9.5-иммунореактивных нейронов в одном ганглии в МС не изменяется в постнатальном онтогенезе, а в ПС увеличивается в первые 10 суток после рождения.</p> <p><bold>Заключение.</bold> В постнатальном онтогенезе в первые 30 суток жизни происходит увеличение размеров нервных узлов в МС и ПС и снижение плотности их расположения на единицу поверхности тонкой и толстой кишки. Форма ганглиев и число нейронов в узлах МС в постнатальном онтогенезе не меняется. Ганглии ПС, в отличие от МС тонкой и толстой кишки крыс, к моменту рождения остаются незрелыми и формирование сети узлов ПС происходит в первые 10 суток после рождения.</p></trans-abstract><trans-abstract xml:lang="zh"><p><bold>论证。</bold>成年动物肠壁内自主神经节的形态学，尤其是肌间（myenteric plexus, MP）和黏膜下（submucosal plexus, SP）神经丛，已有较深入研究，但关于这些结构的年龄相关特征在现有文献中仍缺乏充分资料。</p> <p><bold>目的。</bold> 研究大鼠小肠和结肠壁内肌间神经丛和黏膜下神经丛自主神经节在出生后个体发育中的形态计量学特征。</p> <p><bold>方法。</bold>选用不同年龄阶段的Wistar系雄性大鼠：新生鼠，以及出生后第10、20、30、60天，及12月龄和24月龄。采用免疫组织化学方法，使用带荧光标记的抗蛋白基因产物9.5（PGP9.5）抗体进行分析。</p> <p><bold>结果。</bold>在出生后发育过程中，小肠和结肠内每1 mm<sup>2</sup>的神经节数量逐渐减少，而神经节面积逐渐增大。小肠和结肠MP神经节的平均面积自出生起增加至第60天；SP神经节的平均面积则在出生后前30天内增加。MP每mm<sup>2</sup>的神经节密度在小肠于前60天下降，在结肠于前12月内下降。SP的密度在小肠和结肠均于出生后前60天内下降。在MP，每个神经节的PGP9.5免疫反应性神经元平均数在整个发育过程中保持稳定，而在SP，该平均数在出生后前10天增加。</p> <p><bold>结论。</bold>在大鼠出生后个体发育的前30天内，MP和SP的神经节体积增大，而在小肠和结肠单位面积上的密度降低。MP的神经节形态及单个神经节内的神经元数量在发育过程中保持不变。与大鼠小肠和结肠的MP不同，出生时SP的神经节仍不成熟，其神经节网络的形成发生在出生后前10天。</p></trans-abstract><kwd-group xml:lang="en"><kwd>intramural autonomic nerve ganglia</kwd><kwd>small intestine</kwd><kwd>large intestine</kwd><kwd>myenteric plexus</kwd><kwd>submucosal plexus</kwd><kwd>ontogenesis</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>интрамуральные автономные нервные ганглии</kwd><kwd>тонкая кишка</kwd><kwd>толстая кишка</kwd><kwd>межмышечное сплетение</kwd><kwd>подслизистое сплетение</kwd><kwd>онтогенез</kwd></kwd-group><kwd-group xml:lang="zh"><kwd>壁内自主神经节</kwd><kwd>小肠</kwd><kwd>结肠</kwd><kwd>肌间神经丛</kwd><kwd>黏膜下神经丛</kwd><kwd>个体发育</kwd></kwd-group><funding-group/></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Nozdrachev AD. 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