ABSTRACT
Objective To discuss the feasibility of using serum complement C5a and C5b-9 as predictive indicators of liver injury severity in traumatic rats with hemorrhagic shock.Method Fifry healthy male Wistar rats were randomly(random number)divided into normal group,model 1 hour group,model 3 hours group,model 6 hours group,and model 24 hours group.Plasma CH50,C5a and C5b-9 were detected by using enzyme-linked immunosorbent assay,and rate method was used for determination of plasma aspartate aminotransferase.Paraffin sections of hepatic tissues were used to observe the damage of liver.Results In the model l h group,the CH50 increased significantly and reached the highest value,it began to decline in 3 hours group,and it reached the lowest point in 24 hours group.Compared with the model 3 hours group,6 hours group,and 24 hours group,the level of CH50 in model 1 hour group increased more significantly(respectively P<0.05).A small amount of C5b-9 in the normal group was detected.In the model 1 h group,C5b-9 increased significantly and reach the peak compared with 3hours group,6hours group and 24 hours group,respectively(P<0.05),but in the model 3hours,it began to decline,and in 24 hours group,it reduced to minimum.C5a increased insignificantly in the model 3 hours group,6 hours group and 24 hours group,and peaked in 24 hours group compared with normal group(P<0.05).Aspartate aminotransferase in the model 1 hour group increased significantly and peaked in 24 hours group compared with other groups(P<0.05).Conclusions A large number of complements are activated in the seRing of hemorrhagie shock.C5b-9 and CH50 increase significantly in the early stage,and C5a.increases significantly in the later stage.C5b-9 can be considered as,an initiative factor of liver injury.The low levels of C5a in the early stage may be a mechanism of self-protection of the body.The high levels of CSa in the later stage may be a kind of decompensation,and C5a can be used as a late predictor of disease severity.
ABSTRACT
@#Objective To observe the pharmacokinetics and concentration of 1,3-bis(2-chloroethyl)-1-nitrosourea (BCNU) in brain tissue after BCNU-polylactic acid (PLA) delayed release wafer embedded in brain tissues of dogs.Methods 10% BCNU-PLA delayed release wafer were prepared and embedded in brains of 12 dogs. Peripheral blood of dogs was taken and the animals were executed for brain tissue after surgery in different times. BCNU concentrations in blood and brain tissue were quantified by high-performance liquid chromatography.Results BCNU was able to be detected at 22nd hour, and the Cmax (average 243.64 ng/ml) appears at 35th hour after surgery. The average BCNU concentration in brain tissue was 26.60 μg/g at 5th day after surgery.Conclusion BCNU-PLA delayed release wafer is a useful type for treatment of malignant gliocoma.
ABSTRACT
<p><b>OBJECTIVE</b>To investigate the suppressive effect of resveratrol on growth of U251 human glioma cells and its correlated mechanism.</p><p><b>METHOD</b>U251 human glioma cells were treated with resveratrol at various concentrations, MTT assay was used to determine the inhibitory rate of cell proliferation, FCM to detect the cell apoptosis, the expressions of Bcl-2, Bcl-XL, STAT3 and CyclinD1 were analysed by immunohistochemistry and Western blot to examine the expression of Bcl-2, Bcl-XL, STAT3, CyclinD1, Caspase-3 and Bax.</p><p><b>RESULT</b>After treatment with resveratrol, MTT assay showed the growth of U251 cells was inhibited in dose-dependent and time-dependent manners, apoptosis of cells advanced stage was built up, immunohistochemical staining displayed decreased the expression of Bcl-2, Bcl-XL, STAT3 and CyclinD1 and Western blot showed that resveratrol decreased the expression of Bcl-2, Bcl-XL, STAT3 and CyclinD1, and built up Bax and Caspase-3.</p><p><b>CONCLUSION</b>It is possible that downregulated the expression of Bcl-2, Bcl-XL, but upregulated Bax and Caspase-3, and the indication was obviously in dose-dependent and time-dependent manners.</p>