霍姆注射液对内毒素致大鼠急性肺损伤时肺血管内皮细胞ICAM-1的影响

目的探讨内毒素致大鼠急性肺损伤（ALI）时,肺血管内皮细胞间黏附分子-1（ICAM-1）表达的变化及霍姆注射液（高渗氯化钠羟乙基淀粉40,HH40）的保护作用。方法健康雄性SD大鼠30只,体重250-300g,随机分为3组（每组10只）：空白对照组（C组）给予等容量的NS、急性肺损伤组（L组）和HH40组（H组）均经尾静脉注射大肠杆菌脂多糖（LPS,5 mg/kg）,1min后以5ml/kg输注生理盐水或HH40于10 min内输完。注射内毒素4h后放血处死大鼠,检测肺湿/干重比（W/D）、支气管肺泡灌洗液（BALF）中蛋白含量、肺组织肿瘤坏死因子-α（TNF-α）含量和髓过氧化物酶（MPO）活性及光镜下病理变化,采用免疫组织化学方法检测肺血管内皮细胞ICAM-1的表达。结果与C组相比,L组和H组肺W/D、BALF中蛋白含量、MPO活性和TNF-α含量显著增高,ICAM-1明显升高（P〈0.01）,肺组织出现明显的病理改变;与L组相比,H组各项指标均显著降低（P〈0.01）,病理损伤明显改善。结论ALI大鼠肺血管内皮细胞中ICAM-1呈过度表达,HH40可以抑制肺血管内皮细胞ICAM-1的表达,降低肺W/D、BALF中蛋白含量、MPO活性及TNF-α含量,减轻肺损伤病理学改变,从而达到对ALI的早期保护作用。

Effect of HH40 on ICAM-1 expression in lung vascular endothelium of endotoxin-induced acute lung injury in rats

Objective To investigate the alterations of ICAM-1 in lung vascular endothelium and the protective effect of hypertonic sodium chloride hydroxyethyl starch 40 on endotoxin-induced acute lung injury in rats.Methods Models of acute lung injury(ALI) in rats were induced by lipopolysacchharide(LPS,5 mg/kg,IV).Thirty male Sprague Dawley rats were randomly divided into 3 groups with 10 animals in each group: control group received the same volume of NS;LPS group received NS 5 ml/kg infusion 1 min after intravenou...