alexa HLA-DR and -DQ eplet mismatches and transplant glomerulopathy: a nested case-control study.
Clinical Research

Clinical Research

Journal of Clinical and Experimental Transplantation

Author(s): SapirPichhadze R, Tinckam K, Quach K, Logan AG, Laupacis A,

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Abstract We conducted a nested case-control study from a cohort of adult kidney transplant recipients to assess the risk of transplant glomerulopathy (TG) as a function of donor and recipient HLA-DR and -DQ incompatibility at the eplet level. Cases (n = 52) were defined as patients diagnosed with transplant glomerulopathy based on biopsies showing glomerular basement membrane duplication without immune complex deposition. Controls (n = 104) with a similar follow-up from transplantation were randomly selected from the remaining cohort. HLAMatchmaker was used to ascertain the number of DRB1/3/4/5, DQA1 and DQB1 related eplet mismatches (eplet load). Multivariable conditional logistic regression models demonstrated an increase in the odds of TG (odds ratios [OR] of 2.84 [95\% confidence interval (CI): 1.03, 7.84] and 4.62 [95\% CI: 1.51, 14.14]) in the presence of 27-43 and >43 HLA-DR + DQ related eplet mismatches versus <27 eplet mismatches, respectively. When the eplet load was modeled as a continuous variable, the OR for TG was 1.25 (95\% CI: 1.04, 1.50) for every 10 additional HLA-DR + DQ eplet mismatches. Our study suggests that minimization of HLA-DR + DQ eplet mismatches may decrease the incidence of transplant glomerulopathy diagnosed by indication biopsies. The role of eplet immunogenicity/antigenicity as determinants of allograft outcomes requires further study. © Copyright 2014 The American Society of Transplantation and the American Society of Transplant Surgeons. This article was published in Am J Transplant and referenced in Journal of Clinical and Experimental Transplantation

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