物质P可逆地损害了血脑屏障的完整性和功能
1Academic Unit of Mental Health and Clinical Neurosciences, School of Medicine, University of Nottingham, Nottingham, UK.
Peptides
|June 30, 2023
概括
物质P (SP) 通过诱导压力纤维,独立于紧密结合蛋白,可逆地损害血脑屏障 (BBB) 的完整性. 抑制神经素1受体 (NK1R),Rho相关蛋白激酶 (ROCK) 或氧化合成酶 (NOS) 减轻了这种效应.
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
- 生理学 生理学 生理学
背景情况:
- 已知物质P (SP) 通过其受体,神经素1 (NK1R) 影响血管扩张和组织完整性.
- 在调节血脑屏障 (BBB) 的完整性和功能方面,SP的确切作用在很大程度上仍未被描述.
研究的目的:
- 为了研究物质P (SP) 对体外人类血脑屏障 (BBB) 模型的完整性和功能的影响.
- 阐明了SP引起的BBB透性的变化背后的分子机制.
主要方法:
- 我们使用了体外人类BBB模型,其中包括大脑微血管内皮细胞,星球细胞和细胞周细胞.
- 通过测量超内皮电阻和光素流量来评估BBB完整性.
- 紧接环部件的蛋白质水平,RhoA/ROCK通路和Erk1/2通过西部涂抹分析;通过免疫细胞化学检查亚细胞局部.
主要成果:
- 暴露于物质P (SP) 导致脑微血管内皮细胞中的RhoA,ROCK2和酸化的MLC2和Erk1/2水平增加,这些影响被NK1R抑制剂CP96345.5阻止.
- SP诱导了应力纤维的形成,导致BBB完整性的时间依赖性扰乱,独立于细胞内变化.
- 抑制氧化合成酶 (NOS),Rho相关蛋白激酶 (ROCK) 和神经素1受体 (NK1R) 有效地缓解了SP诱导的BBB功能障碍和压力纤维形成.
结论:
- 物质P (SP) 诱导血脑屏障 (BBB) 完整性的可逆性下降.
- 这种SP介导的BBB干扰通过诱导应力纤维而发生,并且独立于紧结蛋白表达或局部化的改变.
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