【摘要】 目的研究金钠多对脂多糖(LPS)所致急性肺损伤(ALI)的保护机制及治疗作用。方法采用尾静脉注射脂多糖,按5 mg/kg剂量注射,复制急性肺损伤大鼠模型。将63只Wistar品系大鼠随机分成3组,分别为空白对照组、脂多糖损伤组、金钠多治疗组。各组再随机分为3组,分别为尾静脉注射后2 h、6 h和10 h。利用酶联免疫吸附试验(ELISA)检测血清中可溶性ICAM-1(sICAM-1)水平,肺组织标本分别用免疫组化(定性)和蛋白印迹(定量)方法检测其NFkB核因子。结果尾静脉注射脂多糖可成功复制出急性肺损伤大鼠模型；治疗组血清sICAM-1水平明显高于空白对照组(P＜0．01),损伤组的血清sICAM-1水平明显高于治疗组和空白对照组(P＜0．01)；免疫组化和蛋白印迹实验证实,NF-kB核因子在各组中的阳性表达强度为：金钠多损伤组＞脂多糖治疗组＞空白对照组(P＜0．01)。结论脂多糖可诱导急性肺损伤,金钠多对脂多糖所致的急性肺损伤具有显著的保护作用,其机制可能是抑制了肺组织细胞NF-kB的活性。更多还原

【Abstract】 Objective To investigate the effects of Ginaton on acute lung injury (ALI) induced by lipopolysaccaride (LPS).Methods The acute lung injury rat model was induced by receiving 5 mg/kg LPS injection in tail vein.A total of 63 Wistar rats were divide into 3 groups without caring sex.Saline control group,LPS treated group and Ginaton treated group.The samples of different groups were collected 2 h,6 h,and 10 h after tail vein administration.Serum soluble cell ashesion molecule-1 (sICAM-1) was measured by ELISA,immunohistochemical staining and Western blotting of NF-kB were performed on sections of lung specimens.Results The acute lung injury rat model was successfully induced by receiving LPS injection in tail vein.The sICAM-1 levels increased more in Ginaton treated group than those in Saline control group (P＜0.01),and the increase in LPS treated group were the highest.By immunohistochemical staining,the positive NF-kB cells in Ginaton treated group were much less than those in LPS treated group (P＜0.01),and in Saline control group were least (P＜0.01).The results of the Western-blot method were consistent with immunohistochemical method.Conclusion ALI could be induced by LPS,Ginaton showed a protective effect through probably inhibiting activation of NF-kB on LPS-induced-ALI in this animal model.更多还原