ABSTRACT
Objective To explore the effect of panaxadiols saponin (PDS) on the oxidative damage in lung tissue in hemorrhage-lipopolysaccharides (LPS) two hits rats. Methods Forty Wistar rats were divided randomly into 4 groups: sham operational group(S group); two hits groups with hemorrhage-LPS(HL group);dexamethasone preventive therapy group (HLD group) ;panaxadiol saponins preventive therapy group(HLP group). The rats were made first-hit by hemorrhagic shock,LPS were administered intraperitoneally to make endotoxic shock and induce two hits in rats,then the model of acute lung injury (ALI) induced by two hits had been built up successfully. NO-2/NO-3,MDA content and NOS,iNOS,SOD activities were measured by 722S spectrophotometer. Results The results of pathological observation showed that there was obvious inflammatory reaction in lung tissues after two-hits,and the structure was destroied.Compared with HL group,the inflammatory reaction was reduced in HLD group and HLD group.NOS,iNOS activities and NO-2/NO-3,MDA contents were increased significantly,and SOD activity was significantly lower in HL group compared with S group(P
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Objective To investigate the alteration of aquaporin 1(AQP1) expression in lung tissues in hemorrhage-lipopolysaccharide(LPS) two-hits rats and the effects of panaxadiols(PDS)and dexamthasone(Dex) on it.Methods The rat model of acute lung injury was built with hemorrhage-LPS two hits.The experiment was divided into control group(S),two-hits model group(HL),DEX group(HLD),and PDS group(HLP).The pathological changes of lung tissue were examined by HE staining.The expression of AQP1 was analyzed by RT-PCR,Western blotting and immunohistochemical staining.Results ① Significant inflammatory changes in pulmonary interstitial of rats in HL group were observed.However,in HLD group and HLP group,the pulmonary pathologic changes were much slighter.② AQP1 mRNA and protein expressions in lung tissues in HL group were significantly decreased compared with others groups(P
ABSTRACT
AIM: To establish the two-hit rat model with hemorrhage and lipopolysaccharide(LPS) and to study the effect of panaxadiol saponins(PDS) against acute lung injury.METHODS: Forty Wistar rats were divided randomly into 4 groups: sham operational group(S);two-hit groups with hemorrhagic shock-LPS(HL);dexamethasone pretreatment group(HLD) and PDS pretreatment group(HLP).The mean arterial blood pressure(MABP) was monitored dynamically by 4-channel physiological meter RM-6000,and pathological alteration of lung tissues was also observed.The levels of various serum enzymes,TNF-? and IL-6 were detected.RESULTS: MABP decreased in two-hit rat model with hemorrhage-LPS.The serum levels of aspartate aminotransferase,alanine aminotransferase,alkaline phosphatase,lactate dehydrogenase,creatine kinase,TNF-? and IL-6 increased significantly.Severe inflammatory change of pulmonary interstitium in HL group was also observed.CONCLUSION: Endotoxin injection following hemorrhage can be used to establish the animal model of acute lung injury.Similar with dexamethasone,PDS prevents lung tissue from seriously damage through increasing MABP and decreasing the level of serum enzymes,TNF-? and IL-6 levels.