目的 评价不同液体容量复苏对内毒素血症大鼠肺毛细血管内皮细胞水通道蛋白1(AQP-1)表达的影响.方法 健康清洁级雄性SD大鼠50只,体重250~ 300 g,6~8周龄.采用随机数字表法,将其分为5组(n=10):对照组(C组)、内毒素血症组(LPS组)、氯化钠溶液容量复苏组(NS组)、6%羟乙基淀粉130/0.4溶液容量复苏组(HES组)和高渗氯化钠羟乙基淀粉40溶液容量复苏组(HSH组).经股静脉注入LPS 5 mg/kg制备内毒素血症模型.于造模10 min后,经股静脉注入各组所对应的液体,以15 ml/kg恒速输注6h.于造模后即刻、3、6h时采集股动脉血样,用ELISA法测定血清TNF-α浓度,并行血气分析,记录PaO2和乳酸(Lac)浓度,计算氧合指数.造模6h时处死取肺组织,用免疫组化法测定肺毛细血管内皮细胞AQP-1表达,测定肺湿干重(W/D)比值,HE染色观察肺组织病理学结果,行肺损伤评分.结果 与C组比较,LPS组、NS组、HES组和HSH组W/D比值、血清TNF-α、Lac浓度、肺损伤评分升高,AQP-1表达下调,PaO2和氧合指数降低(P<0.05).与LPS组比较,NS组、HES组和HSH组W/D比值、血清TNF-α、Lac浓度、肺损伤评分降低,AQP-1表达上调,PaO2和氧合指数升高(P<0.05).与NS组比较,HES组和HSH组W/D比值、血清TNF-α、Lac浓度、肺损伤评分降低,AQP
Objective To evaluate the effects of volume resuscitation with different fluids on expression of aquaporin 1 (AQP-1) in pulmonary capillary endothelial cells of endotoxemic rats.Methods Fifty pathogen-free male Sprague-Dawley,rats,weighing 250-300 g,aged 6-8 weeks,were randomly divided into 4 groups (n =10 each):control group (group C),lipopolysaccharide group (group LPS),NaCl group (group NS),6% hydroxyethyl starch 130/0.4 group (group HES) and hypertonic hydroxyethyl starch 40 group (group HSH).Sepsis was induced with LPS 5 mg/kg injected via the femoral vein.At l0 min after the model was successfully established,the corresponding fluids were infused into the femoral vein at a constant speed (15 ml/kg over 6 h) via a pump.At 0,3 and 6 h after LPS administration,blood samples were collected from the femoral artery for measurement of serum tumor necrosis factor-α (TNF-α) concentrations and for blood gas analysis.PaO2 and lactate (Lac) concentrations were recorded and oxyge