益生注射液对人内皮细胞缺氧再给氧损伤的拮抗机理研究

A Study on the Protective Mechanism of Yisheng Injection against the Anoxia-Reoxygenation Injury to Endothelial Cells

目的 探讨内皮细胞缺血再灌注损伤及中药益生注射液对其的拮抗机理。方法 用无糖培养基在无氧条件下培养使人脐静脉内皮细胞株 ECV30 4缺氧 1.5小时 ,然后以含糖培养基 ,在 5 % CO2 和 37℃条件下给氧培养 5小时 ,建立内皮细胞缺氧再给氧模型 ,以模拟体内缺血再灌注对血管内皮细胞的损伤 ,并用益生注射液干预其缺氧再给氧过程 ,荧光染色显示胞内钙离子与线粒体 ,细胞化学染色显示胞内琥珀酸脱氢酶 (SDH)和乳酸脱氢酶 (L DH)活性 ,并检测细胞培养液中超氧化物歧化酶 (SOD)、丙二醛 (MDA)和一氧化氮 (NO)浓度。结果 缺氧再给氧使 ECV30 4细胞变圆、收缩、脱落 ,细胞内钙离子含量增高 ,线粒体膜电位减弱 ,SDH活性下降 ,L DH活性增高 ,培养液中 SOD与 NO含量减少 ,而 MDA浓度增高 ;用益生注射液干预后 ,ECV30 4细胞形态基本恢复正常 ,上述多项检测指标的改变得以逆转。结论 缺氧再给氧导致 ECV30 4细胞发生脂质过氧化 ,胞内钙离子超载、SOD活性及 NO水平降低、线粒体功能受损 ,益生注射液可使上述变化得以逆转 。

Objective To explore the mechanism of ischemia reperfusion injury (IRI) and the protective effect of Yisheng injection on endothelial cells (ECs). Methods Human umbilical veins endothelial cell line ECV304 was cultured in RPMI medium 1640 without glucose under 100% N 2 for one and a half hours, and then in RPMI medium 1640 with glucose under normal conditions for 5 hours to mimic ECs' IRI posttransplantaion. A pure nature medicine, Yisheng injection was added into the medium in experimental group. Intracellular calcium and mitochondrial were shown through flourescent staining. The activities of succinic dehydrogenase (SDH) and lactic dehydrogenase (LDH) were detected by cytochemical staining. The concentrations of superoxide dismutase (SOD), malonaldehyde (MDA) and nitrous oxide (NO) in culture medium were determined. Results After treatment with anoxia-reoxygenation, the ECs' morphologic changes were observed, and intracellular calcium concentration, LDH activity, MDA concentration became higher. Meanwhile, mitochondrial membrane potential, concentrations of SOD and NO were lower. Yisheng injection made these changes disappear or become less. Conclusion Anoxia-reoxygenation induces lipid peroxidation, calcium superrcharge in ECs, and damage to mitochondrial function. Yisheng injection can reverse these changes, thus protecting the endothelial cells.