Allograft nephrectomy: a systematic review of immunological consequences and management of immunosuppressants

Abstract

Allograft nephrectomy (AN) is a serious complication of kidney transplantation. Beyond surgical morbidity, AN has important immunological implications. We performed a systematic review to synthesize current evidence on the immunological impact of AN and post-allograft failure immunosuppressive strategies. A systematic review was conducted according to PRISMA guidelines. PubMed/Medline® was searched for studies published from 01/2000 to 03/202- on transplantectomy’s indications and surgical techniques. Eligible designs included meta-analyses, randomized trials, and prospective or retrospective studies evaluating the immunological impact of AN and/or immunosuppression management before, during, or after graft removal in adult or pediatric kidney transplant recipients returning to dialysis. Consistent evidence indicates that immunosuppression withdrawal is the principal driver of allo-sensitization after graft failure. Multiple studies demonstrated marked increases in anti-HLA antibodies following cessation of immunosuppression, regardless of nephrectomy status. When AN was performed under maintained immunosuppression, its independent effect on sensitization and retransplant outcomes appeared limited. Meta-analyses showed comparable survival after retransplantation, although higher PRA levels, delayed graft function, and acute rejection were more frequent in patients with prior nephrectomy. Allo-sensitization after graft failure is primarily driven by immunosuppression withdrawal/reduction rather than AN itself. Individualized immunosuppressive management balancing immunological and infectious risks is essential