异丙酚预先给药对内毒素诱导大鼠肾小球血管内皮细胞通透性升高的影响

目的 探讨异丙酚预先给药对脂多糖(LPS)诱导大鼠肾小球血管内皮细胞通透性升高的影响.方法 分离、培养SD大鼠肾小球血管内皮细胞,以1×106/ml的密度接种于24孔培养板(200 μl/孔)和transwell小室(100 μl/室),采用随机数字表法,将其随机分为6组(n=10),正常对照组(C组)不作任何处理;脂肪乳对照组(I 组)加入10%脂肪乳4 μg/ml;异丙酚组(P组)加入异丙酚4μg/ml;LPS组(L组):加入LPS 10μg/ml;LPS+脂肪乳组(L+I组)加入10%脂肪乳4 μg/ml及LPS 10μg/ml;LPS+异丙酚组(L+P组)加入异丙酚4μg/ml 及LPS 10 μg/ml.于加入LPS前30 min加入脂肪乳或异丙酚,药物的浓度均为终浓度.加入LPS后6 h,收集细胞,采用逆转录-聚合酶链反应测定血管内皮细胞生长因子(VEGF)mRNA表达水平;收集上清液,采用酶联免疫吸附法测定VEGF浓度;测定血管内皮细胞通透性.结果 与C组比较,L组、L+I组和L+P组VEGF mRNA表达上调,上清液中VEGF浓度和血管内皮细胞通透性增加(P＜0.05),而I组和P组上述指标差异无统计学意义(P＞O.05).与L组比较,L+P组VEGF mRNA表达下凋,上清液中VEGF浓度和血管内皮细胞通透性降低(P＜0.05),L+I组上述指标差异无统计学意义(P＞0.05).上清液中VEGF浓度与血管内皮细胞通透性呈正相关(r=0.833,P＜0.05).结论 异丙酚预先给药可抑制LPS诱导大鼠肾小球血管内皮细胞通透性升高,其机制与下调VEGF表达有关.

Abstract：

Objective To investigate the influence of propofol pretreatment on the increased glomerular endothelial cell permeability induced by lipopolysaccharide (LPS) in rats.Methods Glomerular endothelial cells isolated from SD rats were cultured in 24-well plates(200 μl/well) and transwell filters (100 μl/filter) at 1×106/ml and assigned into 6 groups (n=10 each):control group (group C) , introlipid group (group I), propofol group (group P) , LPS group (group L), LPS+introlipid group (group L+I) and LPS+propofol group (group L +P). In group I, 10% introlipid 4 μg/ml was added. In group P, 4 μg/ml propofol was added. In group L, 10 μg/ml LPS was added. In group L+I, 10% introlipid 4 fig/ml combined with 10 μg/ml LPS was added. In group L+ P, 4 μg/ml propofol combined with LPS 10 μg/ml was added. Introlipid or propofol was added 30 min before the administration of LPS and the corresponding concentrations mentioned above were all final concentrations.After 6 h incubation with LPS, the cells were collected for measurement of vascular endothelial growth factor (VEGF) mRNA expression using RT-PCR. The supernatant was collected for determination of the VEGF concentration by ELJSA. The endothelial cell permeability was determined. Results Compared with group C, the expression of VEGF mRNA was up-regulated and the VEGF concentration and endothelial cell permeability were significantly increased in L, L+I and L + P groups (P＜0.05 ) ,but no significant change was found in the parameters mentioned above in I and P groups (P＞0.05). Compared with group L, the expression of VEGF mRNA was downregulated and the VEGF concentration and endothelial cell permeability were significantly decreased in L+P group (P＜0.05), but no significant change was found in the parameters mentioned above in group L+I(P＞0.05). A positive correlation existed between the concentration of VEGF and the permeability of endothelial cells(r= 0.833,P＜0.05).Conclusion Propofol pretreatment can decrease the increased glomerular endothelial cell permeability induced by LPS probably through down-regulation of VEGF expression.

Influence of propofol pretreatment on increased glomerular endothelial cell permeability induced by lipopolysaccharide in rats

Objective To investigate the influence of propofol pretreatment on the increased glomerular endothelial cell permeability induced by lipopolysaccharide (LPS) in rats.Methods Glomerular endothelial cells isolated from SD rats were cultured in 24-well plates(200 μl/well) and transwell filters (100 μl/filter) at 1×106/ml and assigned into 6 groups (n=10 each):control group (group C) , introlipid group (group I), propofol group (group P) , LPS group (group L), LPS+introlipid group (group L+I) and LPS+propofol group (group L +P). In group I, 10% introlipid 4 μg/ml was added. In group P, 4 μg/ml propofol was added. In group L, 10 μg/ml LPS was added. In group L+I, 10% introlipid 4 fig/ml combined with 10 μg/ml LPS was added. In group L+ P, 4 μg/ml propofol combined with LPS 10 μg/ml was added. Introlipid or propofol was added 30 min before the administration of LPS and the corresponding concentrations mentioned above were all final concentrations.After 6 h incubation with LPS, the cells were collected for measurement of vascular endothelial growth factor (VEGF) mRNA expression using RT-PCR. The supernatant was collected for determination of the VEGF concentration by ELJSA. The endothelial cell permeability was determined. Results Compared with group C, the expression of VEGF mRNA was up-regulated and the VEGF concentration and endothelial cell permeability were significantly increased in L, L+I and L + P groups (P＜0.05 ) ,but no significant change was found in the parameters mentioned above in I and P groups (P＞0.05). Compared with group L, the expression of VEGF mRNA was downregulated and the VEGF concentration and endothelial cell permeability were significantly decreased in L+P group (P＜0.05), but no significant change was found in the parameters mentioned above in group L+I(P＞0.05). A positive correlation existed between the concentration of VEGF and the permeability of endothelial cells(r= 0.833,P＜0.05).Conclusion Propofol pretreatment can decrease the increased glomerular endothelial cell permeability induced by LPS probably through down-regulation of VEGF expression.