在小鼠岛皮层和海马体中,围神经网络的雌激素调节
Rachel Nguyen1, Razia Rahyab1, Ashna Deshpande1
1Department of Pharmacology and Toxicology, Virginia Commonwealth University, PO Box 980613, Richmond, VA, 23298, USA.
Neuropharmacology
|August 18, 2025
概括
在雌性小鼠中,雌激素通过调节周神经网络 (PNN) 来影响大脑功能和行为. 雌激醇水平会影响PNN,这表明PNN结构的雌激素控制的特定区域机制.
科学领域:
- 神经科学是一个神经科学.
- 内分泌学 在内分泌学.
- 细胞生物学 细胞生物学
背景情况:
- 围神经网络 (PNN) 是关键的细胞外矩阵结构,围绕着抑制性内神经元,调节神经元的可塑性和行为.
- 性别特定的PNN效应表明荷尔蒙调节,特别是雌激素,影响大脑功能.
研究的目的:
- 研究雌性周期和雌激素对雌性小鼠海马和岛内皮层中PNN的影响.
- 探索雌激素对PNN的调节背后的分子机制.
主要方法:
- 光标签 (WFA和PV免疫染色) 检测PNN和帕瓦胺 (PV) 蛋白质.
- 雌激醇和莱特醇治疗来操纵雌激素水平.
- 对于雌激素受体和芳香酶的局部杂交 (RNAScope).
- 定量PCR (qPCR) 分析矩阵金属蛋白酶 (MMP/ADAMTS) 和组织金属蛋白酶抑制剂 (TIMP) 基因表达.
主要成果:
- 在整个雌性周期中,PNN标记的强度各不相同,在雌性周期中达到峰值.
- 雌激醇降低了PNN标记,而莱特醇 (芳酶抑制剂) 增加了它,表明双向雌激素调制.
- 雌激素受体 (Esr1,Esr2) 和芳香酶 (Cyp19a1) 在PV神经元中显示出不同的区域和循环表达模式.
- 莱特醇治疗改变了MMPs/ADAMTSs和TIMPs在insula和海马的表达.
结论:
- 雌激素在女性大脑中动态调节PNN的积累和降解.
- 涉及雌激素受体和矩阵重塑酶的特定区域机制有助于雌激素介导的PNN结构变化.
- 这些发现突出了雌激素在调节PNN中的作用,以性别特定的方式影响神经元功能和行为.
相关概念视频
The Pineal Gland
The pineal gland, a diminutive endocrine structure named for its pinecone-shaped appearance, is situated atop the third ventricle within the diencephalon region of the forebrain. This gland, composed of secretory cells known as pinealocytes arranged in compact cords and clusters around dense particles of calcium salts, plays a pivotal role in hormonal regulation.
The primary secretion of the pineal gland is the hormone melatonin, derived from serotonin. The concentration of melatonin in the...
The primary secretion of the pineal gland is the hormone melatonin, derived from serotonin. The concentration of melatonin in the...
Regulation of Food Intake
Short-term regulation of food intake primarily involves neural signals from the gastrointestinal (GI) tract, blood nutrient levels, and GI tract hormones. Communication between the gut and brain via vagal nerve fibers plays a significant role in evaluating the contents of the gut. Clinical studies have shown that protein ingestion produces a more prolonged response in these nerve fibers compared to an equivalent amount of glucose. Additionally, the activation of stretch receptors caused by GI...


