BACKGROUND:B cell activating factor belonging to tumor necrosis factor family(BAFF)is essential to B cell differentiation,maturation,survival,and antibody secretion via binding to its receptors,and may play a role in the development of T cell response.Whether or not BAFF signal participates in the kidney allograft rejection is worthy of studying.OBJECTIVE:To analyze the expression and potential bioactivity of BAFF in the peripheral lymphocytes of kidney transplant recipients.DESIGN,TIME AND SETTING:A case observation was performed at the Department of Urology,Third Affiliated Hospital of Soochow University from June 2006 to March 2007.PARTICIPANTS:Eighty-six kidney transplant recipients comprising 60 males and 26 females,aged 12-62 years old,who received first-time kidney transplantation,were included.The serum creatinine levels ranged between 65-267 μmol/L.METHODS:Peripheral blood of follow-up recipients was taken for anticoagulation using EDTA-Na2.Renal graft biopsy samples of some patients were collected.MAIN OUTCOME MEASURES:The expression rates of BAFF+,BAFF-R+,CD4+,CD8+,CD4+ CD25+ CD127-/low,CD134+,CD4+ CD 134+ and CD19+ BAFF-R+ in peripheral mononuclear cells were analyzed,and the ratio of CD4/CD8 was calculated.Biopsy tissue was subjected to pathological and immunohistochemical analyses.RESULTS:BAFF expression rate on the peripheral mononuclear cells was between 0.18%-76.97%.15%was used as the cut-off value.In the ≥15%group,the mean value of BAFF expression rate was 36.91%;BAFF+ mononuclear cells were not significantly correlated to the ratio of peripheral CD4+/CD8+ and the CD4+ CD25+ CD127-/low T lymphocytes.However,there were significant correlations between BAFF+ mononuclear cells and CD134+ lymphocytes or CD4+ CD134+ lymphocytes(P ＜0.01,P ＜0.05,respectively).While in the ＜15%group,there were no significant correlations among all indices.Pathological diagnosis confirmed that BAFF was expressed in the renal tubular epithelial cell cytoplasm and cytomembrane staining of some chronic rejection sections.CONCLUSION:Abnormal high expression of BAFF in peripheral mononuclear cells may be related to renal allograft rejection.

Objective To summarize the experience with cadaveric renal transplantation for improving the long-term survival rate of the recipients.Methods The clinical data of 1210 cases(773 men and 437 women;age range,6-75 years) of cadaveric kidney transplantation from 1986 to 2003 were analyzed retrospectively,including the resection of the donor's kidneys,surgical techniques,use of immunosuppressants,and complications.The 1210 patients underwent renal transplantation for most of them(1047 cases) suffered from chronic glomerulonephritis.Lymphocytotoxicity test was performed in 1210 cases with all