ABSTRACT
Objective:To investigate the effect of continuous blood purification on the expression of cytokines in pig lungs during MODS.Methods:Twenty-five pigs were randomly divided into model group,control group and high volume hemofiltration(HVHF) group.Blood bio-chemical and organ function indexes were determined.Real-time quantitative PCR was used to determine the expression level of IL-6 mRNA and IL-8 mRNA and TNF-? mRNA. Results:After HVHF,the serum chemical and organ-function indexes were improved and the morbidity and mortality of MODS were much lower than those in model group.The expression level of IL-6 mRNA and IL-8 mRNA and TNF-? mRNA in the lung were reduced significantly compared with model group.And the expression level of cytokines associated mRNA in the lungs was interrelated with the rate of respiratory failure. Conclusion:HVHF could decrease the over-expression of cytokine mRNA in the lung after trauma when used at early period so that pulmonary function would be improved.
ABSTRACT
Objective: To investigate the relations among the levels of TNF,TNFR and the frequency of multiple organ dysfunction syndrome(MODS),and to study the possible effect of sTNFR Fc in the treatment of MODS. Methods: Totally 48 healthy male SD rats were randomly divided into the control group, the MODS model group and the sTNFR Fc group.MODS group were established by two hit. At the early stage of resuscitation, 0.4 mg/kg of sTNFRp75 Fc was administrated via vein as the sTNFR Fc group. Levels of TNFR1 and TNFR2 expression on the cell membrane of various organs in the 3 groups were analyzed by Western blot. Results: After administration of sTNFRp75 Fc, the functions of the main organs were obviously improved. The morbidity(43.7%) of MODS and the mortality(12.5%) of animals decreased significantly in the sTNFR Fc group compared with model group(100.0% and 50.0%). The serum TNF bioactivity was significantly blocked by TNFR Fc administration. Both TNFR1 and TNFR2 expression in the control group were low while higher in the MODS model group; however, they were decreased significantly in various organs after sTNFRp75 Fc treatment.Conclusion: Our results suggest that TNF ? and TNFR play key roles in the pathogenesis of MODS and sTNFR could reverse the effects of TNF ? and decrease the morbidity of MODS and the mortality of animals in MODS model.
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Objective: To investigate the changes of sTNFR in rats with MODS and its clinical implication. Methods: Rat delayed two phase models of MODS were replicated, then serum sTNFR were measured respectively pre and post MODS by ELISA method. Results: Serum sTNFRⅠ pre and post MODS was (112.15?24.95) pg/ml and (438.06? 67.06) pg/ml ( P
ABSTRACT
Objective: To explore the expression changes of transmembrane tumor necrosis factor receptor in rats with multiple organ dysfunction syndrome(MODS). Methods: Thirty two healthy male SD rats were randomly divided into 2 groups. Sixteen rats (MODS group) were subjected to two hit to establish MODS model, the other 16 rats (control group) were without any intervention. RT PCR and immunohistochemistry methods were applied to detect the expression of mTNFR 1 at the levels of mRNA and protein. Results: mTNFR 1 was expressed in normal liver, lung and kidney whereas the most abundant expression was found in liver. Compared with normal liver tissue, the expression of mTNFR 1 in MODS group was significantly higher ( P 0.05). Serum concentration of ALT had correlation with mTNFR 1 gene expression level in liver,but no correlation existed between serum concentration of BUN and mTNFR 1 gene expression level in kidney. Conclusion: The expression of mTNFR 1 increases after the occurence of MODS, which indicates that the impact of TNF can be modulated at the level of receptor.