川芎嗪对缺氧缺糖状态下培养的血管内皮细胞ECV-304的影响

Effect of ligustrazine on injury of vascular endothelial cells ECV-304 incluced by hypoxia and lack of glucose

目的 :观察缺氧缺糖条件下血管内皮细胞 (ECV 30 4 )释放乳酸脱氢酶 (LDH)、一氧化氮 (NO)、丙二醛(MDA)水平和细胞膜流动性的变化及川芎嗪对它们的影响。方法 :缺氧缺糖诱导血管内皮细胞损伤 ,自动生化分析仪测定培养液和细胞层中LDH活性 ;用比色法测定细胞培养液中NO水平 ;用荧光法检测细胞内脂质过氧化产物MDA以评价脂质过氧化程度 ;荧光偏振法测定内皮细胞膜流动性。结果 :缺氧缺糖引起的血管内皮细胞LDH释放增加、MDA生成增多和膜流动性增高 ,NO水平降低。而川芎嗪可抑制缺氧缺糖引起的血管内皮细胞释放LDH ,MDA生成和降低细胞膜流动性 ,提高NO水平。结论 :川芎嗪可保护缺氧缺糖诱导血管内皮细胞的损伤 ,其作用机制有待进一步研究。

Objective: To investigate the effects of ligustrazine on nitric oxide (NO), malonaldehyde (MDA) production, release of intracellular lactate dehydrogenase (LDH) and membrane fluidity of the injured human umbilical vein vascular endothelial cell line (ECV-304) with hypoxia and lack of glucose. Method: The experiments were performed in culture of ECV-304 injured with hypoxia and lack of glucose in vitro. The released LDH of ECV-304 was measured with automatic biochemistry analyse. NO content of ECV-304 was monitored with colorimetry. Lipid peroxidation of ECV-304 was monitored as MDA with a fluorometric assay. The membrane fluidity of ECV-304 was measured with the fluorescence polarization method. Result: After culture ECV-304 in hypoxia and lack of glucose for 24 h, the LDH release, MDA production and the membrane fluidity increased significantly and NO level was decreased. Preincubation of ECV-304 with ligustrazine for 24 h reduced LDH release, MDA production, membrane fluidity increasing and increased the level of NO in ECV-304 due to hypoxia and lack of glucose. Conclusion: Ligustrazine has protective effect on injury of ECV-304 induced by hypoxia and lack of glucose.