Effect of anti-angiotensin II type 1 receptor antibodies on the outcomes of kidney transplantation: a systematic review and meta-analysis

Author:

Kang Zhong-Yu1,Liu Chun1,Liu Wei1,Li Dai-Hong1

Affiliation:

1. Department of Blood Transfusion, Tianjin First Central Hospital, 24 Fukang Road, Tianjin, Nankai, China

Abstract

ABSTRACT Background Anti-angiotensin II type 1 receptor antibodies (AT1R-Abs) have been recognized as non-human leukocyte antigen antibodies associated with allograft rejection and poor allograft outcomes after kidney transplantation. The aim of this study was to assess the risk anti-AT1R-Abs pose for rejection and graft loss among kidney transplant (KT) populations. Methods We systematically searched PubMed, Embase and the Cochrane Library databases for relevant articles published from inception until June 2021 to identify all studies concerning the role AT1R-Abs play in the clinical outcome after kidney transplantation. Two reviewers independently identified studies, abstracted outcome data and assessed the quality of the studies. The meta-analysis was summarized using fixed-effects or random-effects models, according to heterogeneity. The major outcomes included delayed graft function, acute rejection, graft loss or patient death after transplantation. Results Twenty-one eligible studies involving a total of 4023 KT recipients were included in the evaluation. Meta-analysis results showed that the AT1R-Ab-positive KT group had a greater incidence of antibody-mediated rejection {relative risk [RR] 1.94 [95% confidence interval (CI) 1.61–2.33]; P < 0.00001} and graft loss [RR 2.37 (95% CI 1.50–3.75); P = 0.0002] than did the AT1R-Abs-negative KT group. There was no significant statistical difference in delayed graft function rate, T-cell-mediated rejection, mixed rejection, acute cellular rejection, acute rejection and patient death rate between the AT1R-Ab-positive KT and AT1R-Ab-negative KT groups. Conclusions Our study shows that the presence of anti-AT1R-Abs was associated with a significantly higher risk of antibody-mediated rejection and graft loss in kidney transplantation. Future studies are still needed to evaluate the importance of routine anti-AT1R monitoring and therapeutic targeting. These results show that assessment of anti-AT1R-Abs would be helpful in determining immunologic risk and susceptibility to immunologic events for recipients.

Publisher

Oxford University Press (OUP)

Subject

Transplantation,Nephrology

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