Abstract: Effective use of immunosuppressive agents to avoid the occurrence of nephrotoxicity and rejection in recipients with delayed graft function (DGF) is a concern for physicians. We investigated the outcomes of treatment with enteric-coated mycophenolate sodium (EC-MPS) in combination with a low-dose of tacrolimus (Tac) in renal transplantation for recipients with a high risk of DGF. We conducted a retrospective study of 61 recipients with a high risk of DGF who were treated with EC-MPS and low-dose Tac. The recipients were separated into a no-DGF group and a DGF group, based on whether DGF actually occurred. The results showed that although EC-MPS and Tac doses were similar in both groups, the percentage of recipients whose mycophenolic acid area under the curve 0–12 h (MPA-AUC_{0–12 h}) was below 30 (mg·h)/L was significantly higher and the Tac trough concentration significantly lower in the DGF group one week after transplantation. Notably, a higher incidence of biopsy-proven acute rejection (BPAR) was found in the DGF group and among all recipients whose MPA-AUC_{0–12 h} was less than 30 (mg·h)/L at one week after transplantation. One-year graft survival, patient survival, allograft function, and the incidence of the most common adverse events were similar in the two groups. In conclusion, the immunosuppressive regime is applicable to Chinese kidney transplant recipients, and early low exposure to EC-MPS was related to acute rejection in the recipients at a high risk of DGF.

Key words: Enteric-coated mycophenolate sodium (EC-MPS); Tacrolimus; Delayed graft function (DGF); Donation after cardiac death (DCD); Kidney transplantation

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