川芎嗪对慢性低氧高二氧化碳大鼠肺动脉压力及管壁胶原的影响

目的:探讨川芎嗪对慢性低O₂高CO₂大鼠肺动脉压力及肺动脉管壁胶原的影响。方法:将SD大鼠30只分为:对照组(A),低O₂高CO₂组(B),低O₂高CO₂＋川芎嗪组(C),低O₂高CO₂时间为4周。结果:⑴B组肺动脉平均压(mPAP)显著高于A组(P＜0.01),C组mPAP显著低于B组(P＜0.01),3组间平均颈动脉压无显著差异(P＞0.05);⑵电镜显示B组肺动脉胶原纤维较A组明显为多,C组较B组明显为少。免疫组化显示B组肺动脉Ⅰ型胶原含量(平均吸光度值LD)较A组明显为高(P＜0.01),C组较B组明显为低(P＜0.01),Ⅲ型胶原LD各组间无明显差异(P＞0.05);⑶B组血浆内皮素浓度高于A组,血清NO₂^-/NO₃^-低于A组,C组血浆内皮素浓度低于B组,NO₂^-/NO₃^-高于B组,P均＜0.01。结论:川芎嗪可预防慢性低 O₂高CO₂性肺动脉高压的形成和肺动脉管壁胶原的沉积。

Effect of ligustrazine on pulmonary arterial pressure and pulmonary arterial wall collagen of chronic hypoxic hypercapnic rats

AIM:To study the effect of ligustrazine on pulmonary hypertensive rats induced by hypoxic hypercapnia. METHODS:Thirty rats were randomly divided into three groups:control group(A),hypoxic hypercapnic group(B), hypoxic hypercapnia+ligustrazine(lig.) group(C). RESULTS: (1) Mean pulmonary arterial pressure(mPAP)of group B was significantly higher than that of group A and mPAP of group C was significantly lower than that of group B(P＜0.01),differences of mean carotid pressure(mCAP) were not significant among three groups (P＞0.05); (2)Electron microscopy and immunohistochemistry showed ligustrazine could inhibit the diposition of collagenous fiber(collagen typeⅠ)in pulmonary arterioles induced by hypoxic hypercapnia; (3) Plasma endothelin level of group C was significantly lower than that of group B (P＜0.01), serum (NO ₂^-/NO₃^-) of group C was significantly higher than that of group B (P＜0.01). CONCLUSION:Ligustrazine can inhibit pulmonary hypertension and the diposition of collagen type Ⅰ in pulmonary arterial wall induced by hypoxic hypercapnia.