Kidney transplant arteriopathy revisited
- PMID: 40533723
- DOI: 10.1007/s40620-025-02308-3
Kidney transplant arteriopathy revisited
Abstract
Background: Transplant arteriopathy involves a spectrum of Leukocyte Common Antigen-positive, hypoelastotic, foam cell intimal fibrosis. Transplant arteriopathy has been associated with both Chronic Active T Cell-Mediated Rejection and Antibody-Mediated Rejection chronicity. Aim of this study was to find clinicopathological correlates of transplant arteriopathy in a single centre retrospective cohort.
Methods: We retrieved 46 biopsies showing transplant arteriopathy from 33 patients, out of a total of 784 biopsies carried out between 2005 and 2014. We retrospectively evaluated Banff Lesion Scores and Additional Diagnostic Parameters as well as the transplant arteriopathy descriptors Leukocyte Common Antigen-positive, hypoelastotic, foam cell, and correlated these findings with clinical data and death-censored transplant survival.
Results: Transplant arteriopathy was frequently associated with antibody-mediated rejection-associated Banff Lesions Scores and Additional Diagnostic Parameters. Hypoelastotic, leukocyte common antigen-positive and foam cell lesions were often combined, with hypoelastotic lesion being the most frequent finding in transplant arteriopathy. Leukocyte common antigen-positive lesion appeared earlier and was associated with Banff Lesion Score v ≥ 1. About half were positive for donor-specific antibodies, about a third had concurrent transplant glomerulopathy, and about a sixth were C4d-positive. Twelve of thirty-three transplants were lost during follow-up, concurrent transplant glomerulopathy was associated with shorter transplant survival.
Conclusions: The frequent coincidence of transplant arteriopathy and indicators of antibody-mediated rejection suggests that this arterial remodelling could indeed be antibody-mediated rejection chronicity. The transplant community should re-examine transplant arteriopathy with an expanded definition including the previously ignored hypoelastotic lesion in order to re-confirm or reject with confidence transplant arteriopathy as Additional Diagnostic Parameter of Antibody-Mediated Rejection chronicity, and to learn about its prognostic and therapeutic implications.
Keywords: Antibody-mediated rejection; Nephropathology; Rejection; Renal biopsy; Transplant vasculopathy.
© 2025. The Author(s) under exclusive licence to Italian Society of Nephrology.
Conflict of interest statement
Declarations. Conflict of interest: JUB is consultant for Sanofi and Novartis. The other authors have nothing to declare. Ethical approval: This study was approved by the Institutional Review Board (11–116) of the University Hospital of Cologne. All transplantations were conducted following the declaration of Istanbul [38]. Informed consent to participate: Patient consent was obtained according to the permission obtained from the Ethical Review Board.
References
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