相关实验视频

Updated: May 5, 2026

A Visual Description of the Dissection of the Cerebral Surface Vasculature and Associated Meninges and the Choroid Plexus from Rat Brain

A Visual Description of the Dissection of the Cerebral Surface Vasculature and Associated Meninges and the Choroid Plexus from Rat Brain

Published on: November 14, 2012

在甲基胺诱导的血脑屏障破坏中RhoA/ROCK信号通路的参与

Jong Su Hwang¹, Tam Thuy Lu Vo¹, Mikyung Kim¹

¹Department of Biochemistry, School of Medicine, Keimyung University, Daegu 42601, Republic of Korea.

|March 28, 2025

概括

甲基胺 (METH) 通过激活RhoA/ROCK通路来破坏血脑屏障 (BBB). 这一途径影响结合蛋白和细胞骨组织,导致甲基胺滥用的BBB功能障碍.

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
药理学药理学是指药理学的学科.

背景情况:

滥用甲基胺 (METH) 是一个具有显著神经毒性影响的全球健康问题.
血脑屏障 (BBB) 功能障碍越来越被认为是METH诱导的大脑病理的一个关键因素.
由于METH引起的BBB干扰的确切机制仍然不完全理解.

研究的目的:

阐明METH损害BBB完整性的分子机制.
研究RhoA/ROCK信号通路在METH诱导的BBB功能障碍中的作用.
评估ROCK抑制剂在缓解METH诱导的BBB损伤方面的治疗潜力.

主要方法:

在体外研究中,使用暴露于METH的初级人类大脑内皮细胞 (HBMEC) 进行了METH.
使用FITC-dextran和跨内皮电阻 (TEER) 试验对细胞透性的评估.
对紧结蛋白表达的分析 (区域封闭-1,克劳丁-5) 和F-actin细胞骨架.
对RhoA/ROCK通路激活的检查,包括肌素轻链 (MLC) 和cofilin的酸化.
在体外和体内对ROCK抑制剂的评估 (Y-27632,fasudil).

主要成果:

在HBMEC中,METH暴露增加了细胞透性和降低了血管完整性.
METH导致紧结蛋白的重新分配和F-actin细胞骨重组.
METH激活了RhoA/ROCK通路,导致MLC和cofilin的酸化增加.
ROCK 抑制剂防止了 METH 诱导的连接蛋白和细胞骨的变化,并在体外和体内减轻了 BBB 泄漏.

结论:

METH通过激活RhoA/ROCK信号通路来诱导血脑屏障功能障碍.
激活RhoA/ROCK会导致F-actin细胞骨重组,并改变紧结蛋白分布.
用抑制剂向RhoA/ROCK通路显示出治疗METH诱导的BBB损伤的希望.

关键词:

在RhoA/ROCK信号通路中.Y-2763232 这是一个很好的例子.血脑屏障血脑屏障血脑屏障血脑屏障甲基胺的使用方法主要的人类大脑微血管内皮细胞

更多相关视频

A General Method for Evaluating Deep Brain Stimulation Effects on Intravenous Methamphetamine Self-Administration

A General Method for Evaluating Deep Brain Stimulation Effects on Intravenous Methamphetamine Self-Administration

Published on: January 22, 2016

A Plate-Based Assay for the Measurement of Endogenous Monoamine Release in Acute Brain Slices

A Plate-Based Assay for the Measurement of Endogenous Monoamine Release in Acute Brain Slices

Published on: August 11, 2021

相关概念视频

Interactions Between Signaling Pathways

Interactions Between Signaling Pathways

Signaling cascades usually lack linearity. Multiple pathways interact and regulate one another, allowing cells to integrate and respond to diverse environmental stimuli.
Convergence and divergence, and cross-talk between signaling pathways
Two distinct signaling pathways can converge on a single functional unit, which may either be a single protein or a complex of proteins. The response is either functionally distinct or synergistic between the two pathways but different from the response...

Small GTPases - Ras and Rho

Small GTPases - Ras and Rho

Ras and Rho are small monomeric GTPases that act downstream of receptor tyrosine kinase (RTK) and regulate various cellular processes. These GTPases switch between active and inactive states by binding to guanine nucleotides.
Three regulatory proteins control their activity:

MAPK Signaling Cascades

MAPK Signaling Cascades

Mitogen-activated protein kinase, or MAPK pathway, activates three sequential kinases to regulate cellular responses such as proliferation, differentiation, survival, and apoptosis. The canonical MAPK pathway starts with a mitogen or growth factor binding to an RTK. The activated RTKs stimulate Ras, which recruits Raf or MAP3 Kinase (MAPKKK), the first kinase of the MAPK signaling cascade. Raf further phosphorylates and activates MEK or MAP2 Kinases (MAPKK), which in turn phosphorylates MAP...