多黏菌素B对内毒素诱导的RAW264.7细胞分泌一氧化氮的影响

被引:1
作者
蒋一帆 [1 ]
力弘 [1 ]
陈道峰 [2 ]
章蕴毅 [1 ]
机构
[1] 复旦大学药学院药理学教研室
[2] 复旦大学药学院生药学教研室
关键词
多黏菌素B; 内毒素; 一氧化氮; 单核巨噬细胞株RAW264.7;
D O I
10.19577/j.cnki.issn10074406.2013.05.001
中图分类号
R96 [药理学];
学科分类号
100602 ; 100706 ;
摘要
目的以单核巨噬细胞株RAW264.7分泌一氧化氮(NO)为指标,观察多黏菌素B(PmB)对内毒素(LPS)作用的阻断能力,为运用PmB消除LPS生物学效应提供实验基础。方法实验分3类:①10μg·L-1LPS预先与RAW264.7细胞作用一定时间后,加入各浓度PmB;②各浓度PmB与RAW264.7细胞作用一定时间后,加入10μg·L-1LPS刺激;③将10μg·L-1LPS与各浓度PmB混合,经不同时间预处理后用于刺激RAW264.7细胞。检测细胞释放NO水平,评价LPS的生物学效应。结果①LPS刺激RAW264.7细胞10min后加入各浓度PmB,NO水平显著降低(P<0.05),但最大抑制率仅为23%;LPS刺激20min后,PmB不能显著降低NO水平。②PmB先作用于RAW264.7细胞10、20 min,再加入LPS,NO水平均显著降低(P<0.05),最大抑制率均为39%;③PmB与LPS经过预处理,RAW264.7细胞分泌的NO显著降低(P<0.001),最大抑制率达80%,并具有量效和时效关系。结论预处理24h,PmB能最大程度地抑制10μg·L-1LPS在RAW264.7细胞上的生物学效应。
引用
收藏
页码:265 / 269
页数:5
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