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- Title
Association of non-HLA antibodies against endothelial targets and donor-specific HLA antibodies with antibody-mediated rejection and graft function in pediatric kidney transplant recipients.
- Authors
Fichtner, Alexander; Süsal, Caner; Höcker, Britta; Rieger, Susanne; Waldherr, Rüdiger; Westhoff, Jens H; Sander, Anja; Dragun, Duska; Tönshoff, Burkhard
- Abstract
Background: Non-HLA antibodies against endothelial targets have been implicated in the pathogenesis of antibody-mediated rejection (ABMR), but data in pediatric patients are scarce. Methods: We retrospectively analyzed a carefully phenotyped single-center (University Children's Hospital Heidelberg, Germany) cohort of 62 pediatric kidney transplant recipients (mean age at transplantation, 8.6 ± 5.0 years) at increased risk of graft function deterioration. Patients had received their transplant between January 1, 1999, and January 31, 2010. We examined at time of late index biopsies (more than 1-year post-transplant, occurring after January 2004) the association of antibodies against the angiotensin II type 1 receptor (AT1R), the endothelin type A receptor (ETAR), the MHC class I chain-like gene A (MICA), and vimentin in conjunction with overall and complement-binding donor-specific HLA antibodies (HLA-DSA) with graft histology and function. Results: We observed a high prevalence (62.9%) of non-HLA antibody positivity. Seventy-two percent of HLA-DSA positive patients showed additional positivity for at least one non-HLA antibody. Antibodies against AT1R, ETAR, and MICA were associated with the histological phenotype of ABMR. The cumulative load of HLA-DSA and non-HLA antibodies in circulation was related to the degree of microinflammation in peritubular capillaries. Non-HLA antibody positivity was an independent non-invasive risk factor for graft function deterioration (adjusted hazard ratio 6.38, 95% CI, 2.11–19.3). Conclusions: Our data indicate that the combined detection of antibodies to HLA and non-HLA targets may allow a more comprehensive assessment of the patients' immune responses against the kidney allograft and facilitates immunological risk stratification.
- Subjects
AUTOANTIBODIES; ENDOTHELIAL cells; GRAFT rejection; HLA-B27 antigen; ACQUISITION of data methodology; KIDNEY transplantation; RETROSPECTIVE studies; CELL receptors; GRAFT survival; RISK assessment; MEDICAL records; TRANSPLANTATION of organs, tissues, etc.; PHENOTYPES
- Publication
Pediatric Nephrology, 2021, Vol 36, Issue 8, p2473
- ISSN
0931-041X
- Publication type
Article
- DOI
10.1007/s00467-021-04969-1