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在发育过程中,大鼠肠道的索马托斯塔丁免疫反应神经元在发育过程中
Andrey I Emanuilov1, Antonina F Budnik2, Petr M Masliukov3,4
1Department of Human Anatomy, Yaroslavl State Medical University, Yaroslavl, Russia.
Histochemistry and cell biology
|August 17, 2024
概括
鼠肠神经元中的索马托斯塔丁 (SST) 表达在发育过程中增加,随着年龄的增长而减少. 在老老鼠中,与胆乙烯转移酶 (ChAT) 的同位化下降,而神经元氧化合成酶 (nNOS) 的同位化增加.
科学领域:
- 神经科学是一个神经科学.
- 胃肠病学 胃肠病学
- 衰老研究研究 衰老研究
背景情况:
- 索马托斯坦素 (SST) 是一种在神经系统,内分泌和免疫细胞中发现的神经递质.
- 肠道神经系统 (ENS),包括肌肠 (MP) 和下 (SP),调节胃肠功能.
- 了解SST表达及其在ENS中的神经元相互作用对于理解肠道生理学和与年龄相关的变化至关重要.
研究的目的:
- 量化不同年龄段的小肠 (SI) 和大肠 (LI) 中的索马托斯坦素免疫反应性 (SST-IR) 神经元.
- 研究SST-IR神经元与胆乙转移酶 (ChAT),神经元氧化合成酶 (nNOS),神经酸Y (NPY) 和状纤维酸蛋白 (GFAP) 的同位化.
- 为了分析SST表达的年龄相关变化及其神经元协会在肌和下.
主要方法:
- 免疫组织化学被用来检测SST-IR神经元及其与ChAT,nNOS,NPY和GFAP的同位化.
- 对小肠 (SI) 和大肠 (LI) 的肌肠 (MP) 和下 (SP) 在从新生儿到老化 (2岁) 的老鼠进行了分析.
- 定量分析确定了SST-IR神经元的百分比和它们与各种年龄组的其他标记物的共同表达.
主要成果:
- 在MP和SP中,SST-IR神经元的百分比在出生后早期显著增加,在老老鼠中下降.
- 在年轻的老鼠中观察到SST-IR神经元与ChAT的高同位化 (97-98%),在老老鼠中降至85-90%.
- 在老老老鼠中,SST-IR神经元与nNOS的局部化显著增加,而SST/NPY局部化显示出可变性,并且没有发现SST/GFAP局部化.
结论:
- 在老鼠肠道神经元中,索马托斯坦的表达会随着年龄的增长而发生显著的变化,在年轻时增加,在衰老时减少.
- 随着年龄的变化,SST与ChAT和nNOS的局部化变化表明神经元电路和ENS中的功能发生了动态变化.
- 这些发现突出了肠道神经系统的可塑性,并提供了关于胃肠道调节年龄相关变化的见解.
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