1,6-二磷酸果糖对LPS急性肺损伤大鼠肺组织巨噬细胞炎症蛋白-2表达的影响  

Effects of Fructose-1,6-diphosphate on the Expression of Macrophage Inflammatory Protein-2 in Rats With Lung Injury Induced by Lipopolysaccharide

作　　者：季艳梅[1] 郭学珍[1] 张浩明[1] 方敏[1] 汪蓉[1] 

机构地区：[1]湖北省郧阳医学院附属太和医院,十堰442000

出　　处：《内科急危重症杂志》2010年第4期207-209,共3页Journal of Critical Care In Internal Medicine

基　　金：湖北省科技攻关项目(No:2004AA301C97)

摘　　要：目的:观察1,6-二磷酸果糖(FDP)预先给药对内毒素性急性肺损伤(ALI)大鼠肺组织巨噬细胞炎症蛋白-2(MIP-2)表达的影响,探讨FDP可能的保护机制。方法:静脉注射脂多糖(LPS)5mg/kg,复制大鼠ALL模型。雄性SD大鼠30只随机分为3组,对照组、LPS组和LPS+FDP组,其中LPS+FDP组于静脉注射LPS前1h腹腔内注射FDP(250mg/kg)。3组于注射LPS或生理盐水后6h颈动脉取血测血气分析,并测定肺组织湿、干重量,计算湿/干重量比(W/D),RT-PCR法测定肺组织MIP-2mRNA的表达;ELISA法测定肺组织TNF-a和IL-lβ的含量。结果:与对照组相比,LPS组和LPS+FDP组MIP-2mRNA表达增加,肺组织W/D、TNF-a和IL-lβ含量上升(P<0.05);与LPS组相比,LPS+FDP组MIP-2mRNA表达降低,肺组织W/D、TNF-a和IL-lβ含量降低(P<0.05)。结论:FDP通过下调大鼠LPS诱导的MIP-2表达,降低TNF-a和IL-lβ的释放,减轻ALI大鼠肺部的炎症反应,保护肺组织。Objective： To investigate the effects of fructose-1, 6 diphosphate （FDP） pretreatment on the expression of macrophage inflammatory protein 2 （MIP 2） in rats with acute lung injury （ALI） induced by lipopolysaccha ride （LPS）, and to explore its possible protective mechanism. Methods.. The rat models with acute lung injury were established via femoral vein injection of lipopolysaccharide （LPS, 5mg/kg）. Thirty male SD rats were randomly divided into 3 groups （n = 10） ： control group, LPS group and LPS ＋ FDP group. Rats in LPS ＋ FDP group pretreated with FDP （250 mg/kg） intrapentoneally 1 hour before LPS injection. Artery blood gases were analyzed 6 hours after LPS or normal saline administration. Samples of lung tissue were sent for the lung wet-to-dry weight ratio determination. The expression of MIP-2mRNA was detected by the method of RT-PCR; and content of TNF-a and IL-1β were detected by the method of ELISA. Results： Compared with those of control group, the expression of MIP- 2mRNA in the cytoplasm and the levels of TNF-a, IL-1β and D/W in the lung tissue were increased in LPS group and LPS＋ FDP group （P〈0. 05） ; while they were decreased in LPS ＋ FDP group compared with those of I.PS group （P〈0. 05）. Conclusions： FDP may decrease the contents of TNFa and IL-1β and alleviate the inflammation of acute lung injury in rat by down-regulating the expression of MIP-2 induced by LPS.

关 键 词：1 6-二磷酸果糖 脂多糖类 巨噬细胞炎症蛋白-2 

分 类 号：R563[医药卫生—呼吸系统]