ABSTRACT
Objective To investigate the effects of ligustrazine (TMP) combined with salvia miltiorrhiza on the progression of chronic allograft nephropathy (CAN) in rats and the action mechanism.Methods Fischer 344 rats and Lewis rats were used as renal transplant recipients and donors for ortlotopic kidney transplantation. The CAN model was established.By using random number table,the kidney transplant recipients were divided into five groups:cyclosporine A (CsA) group (A),TMP + CsA group (B),Salvia + CsA group (C),TMP + Salvia + CsA group (D) and blank control group (E,receiving no treatment).At 2nd,4th,6th,8th and 12th week after operation,5 mice in each group were sacrificed,and the transplanted kidney was removed for examination of renal histopathological changes. The immunohistochemistry was used to detect the expression of transforming growth factor β1 (TGF-β1) in the renal allograts,and by using fluorescent quantitative polymerase chain reaction,TGF-β1 mRNA expression in the renal allograts assayed.Results In blank control group,the survival time was no more than two weeks.In group A,the CAN pathological changes occurred at 4th week postoperation,those in group B and group C occurred later than in group A,and latest in group D with mild pathological lesions.In all groups after operation,Banff scores showed an upward trend,and at the same time point,those in group A were significantly higher than groups B,C and D ( P＜0.05 and P＜0.01 ).and those in group D was significantly lower than in group B and group C (P＜0.05),but no significant difference was found between group B and group C (P＞0.05).With time over,the TGF-β1 expression intensity showed an increasing trend.At the same time point,TGF-β1 expression intensity in group A was strongest among groups A,B,C and D (P＜0.05 and P＜0.01 ),and that in group D was significantly lower than in group B and group C (P＜0.05),but no significant difference was found between group B and group C (P＞00.05).The changes of TGF-β1mRNA expression pattem in each group showed the same trends as TGF-β1 protein expression.Conclusion TMP or salvia miltiorrhiza can delay the progression of CAN in kidney transplant rats by down-regulating the TGF-β1 expression,and the combined use of them exerts synergic effects.
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Objective To explore the proliferative and apoptotic effect of 3 different siRNAs targeting survivin in human bladder cancer cell line EJ28. Methods Three siRNAs targeting survivin and 1 fluorescence-labeled siRNA as a negative control were chemically synthesized. Transfetion efficiency was observed under fluorescence microscope after transfecting the fluorescence-labeled siRNAs. EJ28 cells were divided into 6 groups: siRNA164 group, siRNA167 group, siRNA389 group, and negative control group, lipofectin group and cell control group. The proliferation of EJ28 cell was detected by MTT assay at 24, 48 and 72 h after the transfection. Apoptotic rate was detected by Annexin V-FITC-FCM assay at 48 h.Results All the sequence-specific siRNAs targeting survivin efficiently suppressed the proliferation of EJ28 cells. siRNA 164 had the most powerful effect because of its highest inhibitory rate of (41.32?2.54)% and the highest apoptotic rate of (13.20?0.25)% at 48 h after transfection. Conclusion RNAi targeting survivin has a potential value in the gene therapy of bladder cancer.
ABSTRACT
Objective To study the effect of varicocele(VC) on the expressions of hypoxia-inducible factor-1?(HIF-1?) and apoptosis-associated gene Bax in germ cells of adolescent rats,and investigate the mechanism of the infertility resulting from varicocele. Methods The varicocele model was established by partial ligation of the left renal vein in adolescent male Wistar rats. A total of 25 rats were randomly divided into 2 groups,namely varicocele group(n=15) and sham operation group (SOG,n=10). All the animals were killed 30 d after operation. The left testis was collected and the expression of HIF-1? and Bax was detected by immunohistochemical method. Results The expression of HIF-1? and Bax in left testis of varicocele group was significantly higher than that of sham operation group(P