20(R)-人参皂苷Rg3抗血小板活化因子诱导血管内皮细胞损伤的保护作用
Protective Effects of 20(R)-ginsenoside Rg3 against PAF-induced Injury of Human Umbilical Vein Endothelial Cells
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摘要: 目的 探讨20(R)-人参皂苷Rg3抗血小板活化因子(PAF)损伤人脐静脉血管内皮细胞(HUVEC)的保护作用及其机制.方法 采用MTT法测定PAF诱导HUVEC活性;用双波长荧光分光光度法测定HUVEC细胞内游离钙离子浓度;用ELISA法测定培养的细胞上清液中t-PA 、PAI-1含量.结果 1 μmol/L PAF刺激HUVEC 2 h后,可明显降低HUVEC的吸光度值,细胞内钙离子浓度升高,上清液中PAI-1含量明显升高,而t-PA含量无明显变化;20~80 μmo/L 20(R)-人参皂苷Rg3可升高HUVEC吸光度值,并呈浓度依赖性显著降低HUVEC内游离钙浓度;20(R)-人参皂苷Rg3降低上清液中PAI-1含量,对t-PA含量无明显影响.结论 20(R)-人参皂苷Rg3对PAF诱导损伤的HUVEC具有抗损伤保护作用,其机理可能与降低细胞内钙离子浓度,抑制PAI-1产生和调节t-PA /PAI-1平衡作用有关.
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关键词:
- 20(R)-人参皂苷Rg3 /
- 血小板活化因子 /
- 血管内皮细胞
Abstract: Objective To investigate the protective effect of 20(R)-ginsenoside Rg3 against PAF-induced human umbilical vein endothelial cell(HUVEC)injury and its preliminary mechanism.Methods Platelet activating factor(PAF)was used to injure HUVEC in vitro.Cell viability was assessed with methyl thiazolyl tetrazolium(MTT)assay.The cultured cells were loaded by Fura-2/AM and the change of i in HUVEC was measured by fluorospectrophotometry.The levels of tissue plasminogen activator(t-PA)and plasminogen activator inhibit...-
Key words:
- t-PA/PAI-1 /
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