相关实验视频
Updated: Jan 13, 2026

In Vitro Aggregation Assays Using Hyperphosphorylated Tau Protein
Published on: January 2, 2015
血凝剂细胞外囊泡增加神经元的tau表达,新陈代谢和通过组织因子和蛋白酶激活受体2的处理
Sophie J Featherby1, Eamon C Faulkner1, Andrew Gordon1
1Centre for Biomedicine, Hull-York Medical School, Cottingham Road, Hull, HU6 7RX, UK.
组织因子 (TF) 影响神经元中的Tau蛋白代谢. TF上调调节的表达和酸化,可能导致聚合,但也有助于清除和再生.
科学领域:
- 神经科学是一个神经科学.
- 生物化学 生物化学
- 细胞生物学 细胞生物学
背景情况:
- 神经炎症与神经病理有关,可以由各种侮辱引发.
- 组织因子 (TF) 是一种在脑组织和脑脊液中发现的炎症蛋白质,启动凝血并促进修复.
- TF在蛋白代谢中的作用,特别是与神经退行过程有关的作用,需要进一步研究.
研究的目的:
- 研究组织因子 (TF) 对神经元细胞中Tau蛋白的表达,酸化,聚合和降解的影响.
- 阐明TF影响陶氏代谢的机制,包括其对陶氏mRNA和蛋白质水平,酸化位点和聚合的影响.
主要方法:
- 分化的人类神经母细胞瘤 (SH-SY5Y,HCN-2) 和老鼠神经细胞被TF,含TF的细胞外囊泡 (TF-EV) 或与因子VIIa (fVIIa) 重组TF治疗.
- 评估了表达,酸化 (在Thr181和Ser202),聚合 (使用Amytracker染料) 和降解.
- 用蛋白酶活性抑制和PAR2阻断抗体 (SAM11) 来研究信号通路.
主要成果:
- TF和TF-EV治疗上调了Tau mRNA和蛋白质的表达,在重复暴露时效果得到了增强.
- TF-fVIIa治疗增加了Tau的表达,并诱导了Thr181的显著酸化,以及在较小程度上在Ser202.
- 抑制TF蛋白酶活性或PAR2信号降低Tau酸化在Thr181.1.
- TF诱导了PKC依赖的Tau酸化,长时间的TF暴露导致了Tau聚合的增加.
- TF-fVIIa调解了Tau的受控消化,产生了较小的碎片.
结论:
- TF通过多个途径影响神经元中的Tau代谢,影响表达,酸化和降解.
- TF可以促进tau聚合和酸化,可能有助于神经病理.
- 此外,TF似乎在TAU清除和再生中发挥作用,这表明它在神经元健康和疾病中起着双重作用.
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