Objective To study the influence of donor GFR on the early renal function in recipients undergoing living donor transplantation.Methods A total of 172 living donor transplant recipients in our kidney transplantation center from 2006 to 2011 were enrolled into this study.Among them,166 were genetically related (96.5％),while 6 were genetically unrelated (spouses in 5 and other in 1).The predonation GFR was measured by isotope clearance (99mTC-DTPA with few exceptions).The range of donor GFR was 62 to 148 ml/min.The recipients were classified into two groups according to donor graft GFR level (GFR≤45 ml/min,n=76; GFR＞45 ml/min,n =96).The predonation dialysis,cold and warm ischemia time,antibody induction,immunosuppressive regimens and HLA mismatch were not significantly different between two groups.Results There were no significant differences in the incidence of postoperative acute rejection and delay graft function (DGF).The postoperative Scr of GFR＞45 ml/min group in 1 week,1 month,3 months and 1 year was lower compared with the GFR ≤45 ml/min group,and only the difference of Scr in 1 week was significantly different (P＜0.05).A repeated-measure ANOVA revealed no significant differences were found in Scr variation of two groups during the first year after transplantation.Conclusions Predonation GFR of the donor has effect on the Scr of postoperative Ⅰ week of recipients,not on the Scr within a year.Recipients with graft GFR＞45 ml/min have lower Scr levels.

Objective To prepare a recombinant pneumococcal surface protein A clade 4 ( PspA4) and to analyze its immunogenicity.Methods The gene encoding PspA4 protein was synthesized and inserted into pET-20b to construct the recombinant expression plasmid.The transformed E.coli strains carrying expression plasmid were induced to express PspA4 protein.ELISA was performed to analyze the ti-ters of PspA4-specific IgG in a mouse model.Results The recombinant PspA4 protein of high purity ( 90%) was successfully prepared.The titers of PspA4-specific antibody in mice received PspA4 immuniza-tion were 106 times higher than those of the blank control group, suggesting that the expressed PspA4 protein had the advantage of high immunogenicity.Conclusion This study suggested that the PspA4 protein might be used as one of the candidate protein for the development of pneumovax and laid a foundation for further in-vestigation on pneumococcal protein based vaccine.