Mycophenolate versus azathioprine for kidney transplantation: a 15-year follow-up of a randomized trial.
BACKGROUND: The use of mycophenolate mofetil (MMF) is associated with less acute rejection than azathioprine (AZA) early after kidney transplantation. However, the long-term impact of MMF versus AZA is less well studied. METHODS: The Tricontinental Mycophenolate Mofetil Renal Transplantation Study was a double-blind randomized placebo-controlled trial of MMF versus AZA, together with cyclosporine and steroids, first reported in 1996. We analyzed the long-term outcomes of the Australian cohort of patients enrolled in this study using follow-up data from the Australia and New Zealand Dialysis and Transplant Registry. Patient and graft survival, cancer incidence, and estimated kidney function were compared on an intention-to-treat basis. RESULTS: A total of 133 Australian patients participated in the study: 45 were randomized to AZA, 44 were randomized to MMF 2 g/d, and 44 were randomized to MMF 3 g/d. Baseline characteristics were similar between the groups. Median follow-up was 13.8 years, during which there were 97 graft failures, 75 deaths, and 1 lost to follow-up. There were no statistically significant differences between the groups in long-term patient or graft survival, cancer incidence, or kidney function. Death-censored graft survival was best in the group with 3 g/d MMF and worst in the group with 2 g/d MMF. By 5 years, 42% of the MMF group had switched permanently to AZA, whereas crossover from AZA to MMF was rare. CONCLUSIONS: This long-term examination, although limited by small numbers, found little evidence for the superiority of MMF over AZA.[1]References
- Mycophenolate versus azathioprine for kidney transplantation: a 15-year follow-up of a randomized trial. Clayton, P.A., McDonald, S.P., Chapman, J.R., Chadban, S.J. Transplantation (2012) [Pubmed]
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