Reassessment of the clinical impact of preformed donor-specific anti-HLA-Cw antibodies in kidney transplantation.
Am J Transplant
; 20(5): 1365-1374, 2020 05.
Article
em En
| MEDLINE
| ID: mdl-31883413
ABSTRACT
Anti-denatured HLA-Cw antibodies are highly prevalent, whereas anti-native HLA-Cw antibodies seem to lead to random flow cytometry crossmatch results. We aimed to reassess crossmatch prediction for anti-HLA-Cw using 2 types of single antigen flow beads (classical beads and beads with diminished expression of denatured HLA), and to compare the pathogenicity of preformed anti-denatured and anti-native HLA-Cw antibodies in kidney transplantation. We performed 135 crossmatches with sera reacting against donor HLA-Cw (classical beads fluorescence ≥500); only 20.6% were positive. Forty-three (31.6%) were anti-denatured HLA antibodies (beads with diminished expression of denatured HLA fluorescence <300); all were crossmatch negative. The correlation between classical beads fluorescence and the crossmatch ratio was low (ρ = 0.178), and slightly higher with beads with diminished expression of denatured HLA (ρ = 0.289). We studied 52 kidney recipients with preformed anti-HLA-Cw donor-specific antibodies. Those with anti-native HLA antibodies experienced more acute and chronic antibody-mediated rejections (P = .006 and .03, respectively), and displayed a lower graft survival (P = .04). Patients with anti-native HLA-Cw antibodies more frequently had previous sensitizing events (P < .000001) or plausibility of their antibody profile according to known anti-native HLA-Cw eplets (P = .0001). Anti-native but not anti-denatured HLA-Cw antibodies are deleterious, which underscores the need for reagents with diminished expression of denatured HLA.
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Base de dados:
MEDLINE
Assunto principal:
Transplante de Rim
Tipo de estudo:
Etiology_studies
Limite:
Humans
Idioma:
En
Ano de publicação:
2020
Tipo de documento:
Article