Effect of Hydroxychloroquine Treatment on Kidney Allograft Rejection and Graft Failure.

Kidney allograft rejection is a major issue because it causes graft failure and because immunosuppressive treatments used for its prevention increase the risk of infections and cancers. In systemic lupus patients, hydroxychloroquine is used to prevent immune flares with decreased doses of immunosuppressants. Hydroxychloroquine can be safely used in kidney transplant recipients when indicated for autoimmune disease, but its effect on allograft rejection is unknown. We hypothesized that it may prevent kidney allograft rejection. We conducted a nationwide retrospective propensity-matched study on kidney transplantations of patients treated with hydroxychloroquine in France between 2008 and 2018. We analyzed the incidence of allograft rejection or failure within the first year after transplantation. The rates of rejection or allograft failure were not different between the 188 patients treated with hydroxychloroquine at the time of transplantation and their propensity matched controls. Hydroxychloroquine treatment in association with standard immunosuppressive treatment does not prevent rejection in kidney allograft recipients.

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Declaration of competing interest The authors declare no conflicts of interest.