高原西氏胶囊治疗急性低氧大鼠油酸急性肺损伤的实验研究

Experimental Study on Effect of Altitude Xishi Capsule in Treating Oleic Acid Induced Lung Injury in Acute Hypoxia Rats

目的 :建立急性低氧状态下肺损伤动物模型 ,探讨高原西氏胶囊 (西氏胶囊 )对急性肺损伤的治疗作用及其机理。方法 :实验用雄性Wistar大鼠 ,放入小动物低压仓内 ,匀速减压至模拟海拔 60 0 0m高度气压 ,持续减压 1 2h。然后用油酸复制肺损伤模型 ,并观察西氏胶囊对肺损伤的防治作用。结果 :由上腔静脉注入油酸后 ,成功复制大鼠急性肺损伤模型 ,与注油酸前比较 ,呼吸频率增加明显 ,肺水含量 (湿 /干比值 )随时间的延长而加重。西氏胶囊组肺水含量显著降低 ,肺水肿和炎细胞浸润的病理变化均较油酸组轻。结论 :从插管的上腔静脉直接注入油酸复制急性肺损伤模型 ,成功率达 1 0 0 %。更接近于临床急性肺损伤的改变。西氏胶囊可使肺水肿减轻 ,炎细胞浸润减少 ,对急性低氧油酸肺损伤有较好的防治作用。

Objective: To explore the effect and pathophysiological mechanism of Altitude Xishi Capsule (XSC) on lung injury during acute hypoxia. Methods: A new model of acute lung injury was established by administering oleic acid into superior vena cava in experimental rat during acute hypoxia, which was formed by putting the animal in a hypobaric room ,and reduced the pressure gradually in uniform speed till a simulated environment of 6000 m above sea level was formed and lasted for 12 hours. XSC was given orally to the rat before oleic acid administration. The effect of XSC on the model was observed by determination of PaO 2, wet/dry ratio of lung and pathologic examination at 1,2,3 and 4 hours separately. Results: The respiratory frequency of model animal increased markedly, with the water content of lung reduced and aggravated as the hypoxia prolonged. XSC could obviously improve the pulmonary edema and inflammatory cell infiltration in lung. Conclusions: The aforesaid acute lung injury model with successful rate of 100%, it resembles the clinical acute lung injury and was useful for research on pathophysiology and treatment of ARDS or acute lung injury, XSC could improve the oleic acid induced lung injury in hypoxia rats by reducing the pulmonary edema and inflammatory cell infiltration.