干扰细胞外矩阵和神经周网调节细胞外空间体积和几何
Eva Syková1, Ivan Voříšek2, Zenon Starčuk3
1Institute of Neuroimmunology, Slovak Academy of Science, Bratislava 84510, Slovakia sykovae@gmail.com.
概括
用4-methylumbelliferone (4-MU) 破坏大脑的细胞外基质 (ECM) 会增加细胞外空间 (ECS) 体积和改变扩散,影响神经可塑性和通信.
科学领域:
- 神经科学是一个神经科学.
- 生物化学 生化学
- 细胞生物学 细胞生物学
背景情况:
- 大脑的细胞外基质 (ECM),包括周神经网络 (PNN) 和扩散ECM (dECM),对于神经发育,可塑性和疾病进展至关重要.
- 通过改变细胞外空间 (ECS) 内的神经活性物质扩散,ECM重塑影响了超突触传输.
研究的目的:
- 调查破坏PNN和dECM如何影响大脑扩散性.
- 分析氨酸 (HA) 合成抑制对ECM结构和ECS体积的影响.
主要方法:
- 口服4-甲基贝利费龙 (4-MU),一种HA合成抑制剂,给大鼠服用长达6个月.
- 对于ECM组件和状纤维酸蛋白 (GFAP) 的免疫组织化学染色.
- 实时离子泳和扩散权重磁共振成像 (dMRI) 来评估ECS体积和水扩散.
主要成果:
- 4-MU治疗降低了PNN,HA,冠状素硫酸蛋白质糖和GFAP的调节,表明ECM和星球细胞的变化.
- 在体感皮层中,ECS体积分数 (α) 增加了35% (从0.20增加到0.27).
- 在多个大脑区域和脊髓中,dMRI揭示了平均扩散率降低和分数异构性 (FA).
结论:
- 调节PNN和dECM导致ECS体积增加,FA减少.
- 这些ECM变化,以及天体细胞缩,可能会影响超突触传播,细胞间通信和神经可塑性.
- 观察到的ECM变化在停止4-MU治疗后是可逆的.
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