γ-Bungarotoxin通过抑制整合素α5来损害血管内皮屏障的功能
Wei Chen1, Haotian Yu2, Chengbiao Sun2
1Department of Physiology and Pathophysiology, College of Medicine, Yanbian University, Yanji 133002, Jilin, PR China.
Toxicology letters
|July 1, 2023
概括
蛇毒蛋白质的玛-加毒素 (γ-BGT) 通过结合整体素α5.5来破坏血管内皮屏障功能. 这导致细胞结构变化和潜在的中毒诊断生物标志物.
科学领域:
- 毒理学 毒理学 毒理学
- 分子生物学分子生物学
- 血管生物学 血管生物学
背景情况:
- 来自Bungarus multicinctus毒素的玛-加毒素 (γ-BGT) 引起了急性毒性.
- 溶解蛋白,包括含有RGD动机的蛋白质,如γ-BGT,可以通过结合整体蛋白来破坏血管内皮稳定.
- γ-BGT诱导的血管内皮功能障碍的机制尚未完全理解.
研究的目的:
- 为了研究底层的分子机制 γ-BGT诱导的血管内皮屏障功能障碍.
- 确定受 γ-BGT.影响的特定的整合蛋白标和下游信号通路.
- 为了探索潜在的诊断生物标志物 γ-BGT中毒.
主要方法:
- 选择性结合试验以确定血管内皮 (VE) 中的γ-BGT点.
- 分析下游信号事件,包括焦粘附激酶 (FAK) 脱和细胞骨重塑.
- 蛋白质组学分析以识别效应分子.
- 评估血管透性和屏障完整性.
主要成果:
- γ-BGT选择性地与VE中的整合素α5结合,促进血管透性.
- 结合启动FAK脱化和细胞骨重塑,破坏细胞间连接.
- 环素D1在整合素α5/FAK通路中起到下游效应的作用,调解细胞变化.
- 尿素激酶和血小板衍生的生生长因子D被确定为潜在的生物标志物.
结论:
- γ-BGT通过与整体素α5.5的特定相互作用诱导血管内皮屏障功能障碍.
- 整合素α5/FAK信号通路和环素D1对于调解γ-BGT的作用至关重要.
- VE释放的泌尿酶和PDGF-D可以作为g-BGT诱导毒性的诊断标记.
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