芦丁抑制家兔血小板激活因子诱导血小板活化作用的实验研究

目的：观察芦丁对家兔血小板激活因子（PAF）诱导血小板聚集、5－羟色胺（5－HT）释放、血小板内游离钙离子浓度的影响及其机理。方法：以比浊法测定家兔洗涤血小板（WRR）聚集率，邻苯二甲醛（OPT）荧光分光光度法测定5－HT含量，以Fura-2荧光分光光度法测定血小板游离钙离子浓度的变化。结果：芦丁体外呈浓度依赖性抑制PAF（9．55×10^-9mol/L)诱发的WRP聚集、5－HT释放作用，IC50分别为0．73、1．13mmol/L；同时68．3、274、545μmol/L芦丁剂量依赖地抑制PAF（4．78×10^-9mol/L)引起的血小板内游离钙浓度增高。结论：芦丁可抑制PAF诱导的血小板聚集、5－HT释放及血小板内游离钙浓度增加。

Experimental Study on Inhibitory Effect of Rutin against Platelet Activation Induced by Platelet Activating Factor in Rabbits

OBJECTIVE: To explore the inhibitory effect and mechanism of rutin against platelet activating factor (PAF) induced platelet aggregation, 5-HT release and intra-platelet free calcium concentration. METHODS: The rate of washed rabbit platelet (WRP) aggregation was measured by turbidimetry and O-phthaldialdehyde (OPT) fluoro-spectrophotometry (FSPM) was used to determine 5-HT content. The intraplatelet free calcium concentration was measured with Fura-2/AM FSPM assay. RESULTS: Rutin in vitro was concentration-dependently inhibiting PAF (9.55 x 10(-9) mol/L) induced WRP aggregation, the IC50 of 5-HT release was 0.73, 1.13 mmol/L respectively and the intraplatelet free calcium concentration elevation evoked by PAF (4.78 x 10(-10) mol/L) were inhibited by 68.3, 136, 274, 545 mumol/L of rutin dose-dependently. CONCLUSION: Rutin could inhibit PAF induced platelet aggregation, 5-HT release and the increase of intraplatelet free calcium.