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Original Articles: Dialysis and Transplantation
Tacrolimus combined with mycophenolate mofetil can effectively reverse C4d-positive steroid-resistant acute rejection in Chinese renal allograft recipients
Research Institute of Nephrology, Jinling Hospital, Nanjing University School of Medicine, 305 East Zhong Shan Road, Nanjing, 210002, China
Correspondence and offprint requests to: Lei-Shi Li, MD, Research Institute of Nephrology, Jinling Hospital, Nanjing University School of Medicine, 305 East Zhong Shan Road, Nanjing, 210002, China. Email: lilsh{at}cae.cn, or sunqiquan{at}yahoo.com
Background. Tacrolimus (TAC) combined with mycophenolate mofetil (MMF) has been suggested to play a critical role in the reversal of C4d-positive acute humoral rejection (AHR) in renal transplantation, but the efficacy of using only TAC–MMF without immunoadsorption or plasmapheresis has not been investigated. On the other hand, Chinese recipients of renal grafts usually need lower doses of immunosuppressants, and their optimal treatment for acute humoral rejection has not been established.
Methods. Since 1999, we have used TAC–MMF to treat steroid-resistant acute rejection (AR). C4d staining was retrospectively performed in 32 patients with steroid-resistant AR, and the treatments of 19 patients with C4d-positive steroid-resistant AR were investigated.
Results. Thirteen of 19 patients received TAC–MMF treatment only; 11 episodes of rejection in them were reversed (7 completely, 4 partially) and only 2 recipients lost their graft. Another 6 patients received immunoadsorption also. One of them failed to be converted to TAC-MMF and lost her graft. Four of 5 patients treated with immunoadsorption and TAC–MMF recovered (3 completely, 1 partially), but 3 of them had severe pneumonia, a complication rate statistically higher than in patients treated with only TAC–MMF (P<0.05). AR occurring during the first two weeks after transplantation had a statistically better outcome than that occurring later (P = 0.003).
Conclusion. Our study suggests that the combination of TAC and MMF is a potentially safe and economic treatment for most Chinese renal allograft recipients with C4d-positive steroid-resistant AR, especially for rejections developing within the first two weeks after transplantation.
Keywords: kidney transplantation; acute rejection; C4d; mycophenolate mofetil; tacrolimus
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