ABSTRACT
BACKGROUND: To avoid acute rejection,it is necessary to use imunosuppressive drug regimen for long term to control immune state.However,imunosuppressive drug regimen of allogenic organ transplantation increases infection incidence of recipients,and induction of allograft immunological tolerance might be an ideal method for solving these problems.The long-term immunologic tolerance has been able to be induced in the experimental rodent models.Among these protocols,donor bone marrow cell (DBMC) infusion exerts an important role in the induction of allograft immunological tolerance.OBJECTIVE: To investigate effects of combination of cyclosporine A (CsA) with DBMC infusion on heterotopic rat cardiac allograft survival time.DESIDN: A randomized controlled animal experiment.SETTING: Renal Disease Center,First Affiliated Hospital of Zhejing University School of Medicine.MATERIALS: This study was performed at the Laboratory Animal Center,Zhejiang University School of Medicine between March 2002 and December 2005.Inbred male Lewis rats (n=40,serving as donors) and male BN rats (n=60,serving as recipients) of SPF grade were used in this study.The protocol was approved by the Hospital's Ethic's Committee.METHODS: Forty rats prepared for heterotopic rat cardiac allograft were randomly divided into 4 groups,with 10 rats in each: control group,in which,rats received no treatment,CsA group,in which,rats received CsA infusion for 7 days successively; CsA +DBMC group,in which,rats received DBMCs during and 6 days after the surgery and additional 7 successive days of CsA infusion,and a DBMC group,in which,rats received DBMCs infusion during and 6 days after the surgery.In addition,BN rats that received beterotopic rat cardiac allograft served BN controls.The survival time of heteroropic rat cardiac allograft was investigated.Serum interleukin-2 level and tumor necrosis factor-α mRNA expression level in the transplanted cardiac allograft were measured. The percentage of antigen presenting cells (APC) from donor,CD3+CD25+ cells,CD4+CD25+ cells,CD86+ cells,and the ratio for CD4+CD45RC+ and CD4+CD45RC- in the recipient peripheral blood karyocytes were measured by flow cytometry 6,12 and 18 days after surgery.MAIN OUTCOME MEASURES: The survival time of beteruropic rat cardiac allograft,serum interleukin-2 (IL-2)level,tumor necrosis factor- α (TNF- α ) rnRNA expression level, rejection grading,the percentage of DBMCs in the recipient peripheral blood karyocytes,CD3+CD25+ cells,and CD4+CD25+ cells,as well as CD86 expression,and the ratio for CD4+CD45RC+ and CD4+CD45RC.RESULTS: Forty Lewis male rats and sixty male BN rats were all included in the final analysis. The heterotopic rat cardiac allograft survival time was longer in the CsA +DBMC group than in the control group and DBMC group (P ＜ 0.05). Serum IL-2 level and TNF- α mRNA expression were respectively lower in the CsA +DBMC group than in the control group and DBMC group ( P ＜ 0.05).The rejection was milder in the CsA +DBMC group than in the remaining 3 transplantation groups.In the CsA +DBMC group,CD 86 expression in the recipient peripheral blood karyocytes was markedly inhibited,and 6 and 12 days after surgery,the ratio for CD4+CD45RC+ and CD4+CD45RC- and the percentage of CD3+CD25+ were respectively lower compared to control group and DBMC group.DBMCs in the recipient peripheral blood karyocytes were more in rats that received DBMC infusion compared to rats that received no BDMC infusion.CONCLUSION: Short-term CsA treatment combined with DBMC infusion can lower acute rejection of heterotopic rat cardiac allograft and prolongssurvival time of cardiac allograft.
ABSTRACT
24 cases of renal failure induced by chemotherapy were treated with Wuling powder plus additives.Theresult of clinical amelioration was 87.5%.with a to-tal effective yielded marked actions of promoting ap-petite in animals,lowering serum urea nitrogen,cre-atinine,2 microglobulin.It also decreased the inhibi-tion of PDD on the enzyme activity of renal Na~+—K~+ATP.Microscopic exam revealed the pathological le-sion of kidney to be milder in the tested group.