小型细胞外囊泡通过参与Wnt-平面细胞极性通路来促进轴突外生长
Samar Ahmad1, Tania Christova1, Melanie Pye2
1Department of Biochemistry, Donnelly Centre, University of Toronto, Toronto, ON M5S 3E1, Canada.
Cells
|January 10, 2025
概括
纤维细胞衍生的小细胞外囊泡 (sEVs) 促进神经元中的轴突生长. 这个过程需要Wnt-平面细胞极性 (PCP) 路径组件和内生Wnts的纤维细胞sEV来增强轴突延长.
科学领域:
- 神经科学是一个神经科学.
- 细胞生物学 细胞生物学
- 细胞外囊泡研究研究
背景情况:
- 神经元两极分化对于神经系统发育至关重要.
- 小型细胞外囊泡 (sEVs) 显示出促进神经元外生长的潜力.
- 纤维细胞衍生的sEVs在中枢神经系统轴突延长中的作用尚不清楚.
研究的目的:
- 为了研究纤维细胞衍生的sEVs对小鼠皮质神经元中轴突外生长的影响.
- 阐明潜在的分子机制,包括Wnt信号传输和平面细胞极性 (PCP) 路径组件的参与.
- 为了比较来自不同细胞源 (纤维细胞,神经元,星球细胞) 的sEVs对神经元轴突延长的影响.
主要方法:
- 鼠标胚胎皮质神经元的初级培养.
- 用纤维细胞衍生小细胞外囊泡 (sEVs) 进行治疗.
- 使用免疫光学和显微镜分析轴突外生长,神经元形态和Wnt-PCP通路组件局部化.
主要成果:
- 纤维细胞衍生的sEVs显著促进轴突外生和神经元两极分化.
- sEV诱导的轴突延长取决于内源的Wnt配体和核心PCP蛋白 (Prickle,Vangl,Frizzled,Dishevelled).
- 纤维细胞sEV被神经元内化,与Wnt7b同位,并促进Vangl2转移到远端轴突;来自神经元或星球细胞的sEV具有不同的或抑制作用.
结论:
- 纤维细胞衍生的sEVs是中枢神经系统神经元中轴突延长的强有力的诱导剂.
- 纤维细胞sEVs的亲轴突效应是由Wnt-PCP途径介导的,需要与内源性Wnts的相互作用.
- 这些发现凸显了纤维细胞衍生的sEVs在神经发育和修复方面的特殊治疗潜力.
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