川芎嗪对胰岛素抵抗大鼠急性局灶性脑缺血tPA,PAI,DD和ET-I含量的影响

目的 :探讨川芎嗪对胰岛素抵抗 (IR)大鼠脑缺血的防护作用。方法 :采用电凝大脑中动脉致急性局灶性脑缺血模型、川芎嗪对IR急性局灶性脑缺血大鼠血浆组织型纤溶酶原激活物 (tPA)及其抑制物 (PAI)、D-二聚体 (DD)、内皮素-1(ET-I)、超氧化物歧化酶 (SOD)和胰岛素敏感性指数 (IAI)变化。结果 :川芎嗪提高IAI(P<0.01) ,PAI 1含量 (P<0.01)和SOD活性 (P<0.01) ,降低血浆tPA活性 (P<0.01)、ET-I含量 (P<0.01)和DD含量 (P<0.01)。结论 :川芎嗪对IR大鼠急性局灶性脑缺血具有防护作用是由于改善纤溶功能、降低ET I和增加SOD活性有关。

Protective Effect of Ligustrazine on Insulin Resistance after Local Cerebral Ischemia of Rat

OBJECTIVE: To study the protective effect of Ligustrazine on IR after local cerebral ischemia of rat. METHOD: Models of rat IR after local cerebral ischemia were prepared by electrocagulation of the middle cerebral artery, and changes of serum insulin, tomer necrosis factor-alpha (TNF-alpha), plasma endothelin-1 (ET-1), nitric oxide (NO) and nitric oxide synthase (NOS) were observed 2 weeks after the ischemia. RESULT: Ligustrazine could significantly reduce serum insulin (P < 0.01), the content of plasma ET-1 (P < 0.01) and serum TNF-alpha (P < 0.01), the activity of brain tissue NO and NOS (P < 0.01). The drug also increased insulin sensitivity indexes (ISI). CONCLUSION: The protective effects of Ligustrazion on IR cerebral ischemia may be related to decreasing ET-1 content in plasma, TNF-alpha content in serum, NO content and NOS activities in tissue.