title: Effects of and predictors for tacrolimus rescue therapy among renal transplant patients under cyclosporine-based immunosuppression.
abstract: BACKGROUND
  Though cyclosporine has dramatically decreased rejection rates and improved graft survival rates of renal allografts, there is still a remarkable rate of acute rejection and progressive deterioration of renal function after transplantation. Rescue therapy with tacrolimus has been used for allografts failing under cyclosporine-based treatment in order to get some renal functional recovery or stabilization. The aim was to evaluate tacrolimus rescue therapy for failing allografts under cyclosporine-based immunosuppression for possible prediction factors for success.
  
  
  METHODS
  Thirty-five renal allograft recipients with failing transplants under cyclosporine-based immunosuppression were enrolled into this study. Renal function was evaluated by reciprocal serum creatinine level (1/Cr) and calculated CCr. The slope of changes in 1/Cr and CCr were calculated before and after tacrolimus therapy. The possible risk factors that affect the outcome of tacrolimus rescue therapy were analyzed.
  
  
  RESULTS
  Nineteen patients showed improved renal function (group 1) and 16 patients, persistent deterioration (group 2) after rescue therapy. Group 1 showed positive slopes of changes of 1/Cr and CCr after rescue therapy. Group 2 patients showed persistent negative slopes although less negative than before rescue therapy. Only the posttransplant time was the significant predictive factor for successful tacrolimus therapy (P = .018).
  
  
  CONCLUSIONS
  Tacrolimus rescue therapy improved or stabilized renal function in some patients with failing grafts under cyclosporine-based immunosuppression. To assure a successful rescue effect, it should be given early after transplantation, if there is a tendency toward deterioration of renal function.
authors.affiliation: Department of Surgery, National Taiwan University Hospital, Taipei, Taiwan. rhhu@ha.mc.ntu.edu.tw
authors.forename: R-H
authors.initials: RH
authors.lastname: Hu
authors.forename: C-Y
authors.initials: CY
authors.lastname: Lee
authors.forename: M-K
authors.initials: MK
authors.lastname: Tsai
authors.forename: P-H
authors.initials: PH
authors.lastname: Lee
mesh_terms: D003404:Creatinine / Q000097:blood; D016572:Cyclosporine / Q000627:therapeutic use*; D005260:Female; D006801:Humans; D007166:Immunosuppressive Agents / Q000627:therapeutic use; D016030:Kidney Transplantation / Q000276:immunology*; D008297:Male; D016559:Tacrolimus / Q000627:therapeutic use*; D017211:Treatment Failure; D016896:Treatment Outcome
chemical_list: D007166:Immunosuppressive Agents; D016572:Cyclosporine; D003404:Creatinine; D016559:Tacrolimus