目的观察生芎配伍方对脑缺血性损伤大鼠模型的抗栓及纤溶作用,探讨其抗脑缺血损伤的相关机制。方法将SD大鼠随机分为假手术组、模型组、生芎配伍方高、中、低剂量组。用MCAO法制作脑缺血损伤大鼠模型,并测定各组大鼠脑组织中6-酮-前列腺素F1α(6-Keto-PGF1α)、血栓素B2(TXB_2)的含量,检测血浆组织型纤溶酶原激活物(t-PA)及其抑制物(PAI)的活性。同样用4VO法制作脑缺血损伤模型,观察脑组织内皮素-1(ET-1)基因表达的变化情况。结果脑缺血组6-Keto-PGF1α含量、血浆t-PA活性与假手术组比较降低,而TXB_2含量、PAI活性水平则升高,差异具有统计学意义(均P〈0.05或P〈0.01);生芎配伍方高、中剂量组6-Keto-PGF1α含量、血浆t-PA活性与脑缺血组比较均升高,而TXB_2含量、PAI活性水平则降低,差异均具有统计学意义(均P〈0.05或P〈0.01)。假手术组左侧与右侧脑组织中ET-1基因表达,差异无统计学意义(P〉0.05),而脑缺血组与生芎配伍方组缺血侧脑皮层(左侧)ET-1基因表达则高于自身健侧相应脑皮层区(右侧),差异均具有统计学意义(均P〈0.01),脑缺血组也高于假手术组缺血侧脑皮层ET-1基因表达,差异均具有统计学意义(均P〈0.01);生芎配伍方高、中剂量组缺血侧脑皮层ET-1基因表达则低于脑缺血组缺血侧,差异均具有统计学意义(均P〈0.01),但仍高于其自身健侧相应脑区,差异均具有统计学意义(均P〈0.01)。结论生芎配伍方可能通过抗凝、抗栓、增强纤溶活性、抑制ET-1基因表达等发挥治疗脑缺血损伤的作用。
Objective: To study the anticoagulant and fibrinolysis effects of Shengxiong compatibility prescription(SCCP) on rats with cerebral ischemic injury and to find the mechanism of its anti cerebral ischemia injury.Method: MCAO model rats with cerebral ischemic injury were randomized into the sham-operation group,the model group,three SCCP-treated groups(high dose group,middle dose group and low dose group). The contents of prostacyclin(PGI_2) and thromboxane B_2(TXB_2) in brain tissue,the plasma tissue-type plasminogen activator(tPA) and plasminogen activator inhibitor(PAI) and the gene expression of endothelin-1(ET-1) were detected in each group. Results: SCCP could significantly increase the content of PGI_2,decrease the level of TXB_2 in brain tissue,regulate the activities of plasma t-PA and PAI,and reduce the gene expression of ET-1 in the side of ischemia cerebral cortex. Conclusion: SCCP provides anticoagulation,improve fibrinolytic activity and reduce ET-1 gene expression,which may be the mechanism of YTG′s anti-cerebral ischemia injury.