Background: The Kidney Disease: Improving Global Outcomes (KDIGO) guidelines recommend that T-cell-depleting agents should be used only for kidney transplant (KT) recipients at high immunologic risk. However, the effects of thymoglobulin induction therapy in low-immunologic risk KT recipients on tacrolimus, mycophenolic acid, and steroid have not been elucidated yet.
Methods: We retrospectively collected 6 months postoperative clinical data, for low-immunologic risk KT recipients at Soonchunhyang University Hospital. Recipients were divided into thymoglobulin and basiliximab groups, based on the induction agent used. Low-immunologic risk recipients were defined as those with panel-reactive antibody level <30% at the time of kidney transplantation. The incidence of biopsy-proven acute rejection and borderline change was compared between the two groups.
Results: Of the 46 low-immunologic risk patients, 25 received thymoglobulin. The incidence of biopsy-proven acute rejection was 0% (n = 0) and that of borderline change was 8% (n = 2) in the thymoglobulin group. The basiliximab group had a significantly higher incidence of rejection (23.8%; n = 5; P = .015) and borderline change (42.9%; n = 9; P = .006). No significant difference in estimated glomerular filtration rate was found between the two groups at 6 months after kidney transplantation. Cytomegalovirus (CMV) infection occurred more frequently in the thymoglobulin group than in the basiliximab group. All patients with CMV infection in both groups were effectively treated with pre-emptive intravenous ganciclovir therapy.
Conclusions: In low-immunologic risk KT recipients who received tacrolimus, mycophenolic acid, and steroid therapy, thymoglobulin induction therapy significantly reduced the incidence of biopsy-proven acute rejection and borderline change compared with basiliximab induction therapy.
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