Association of HLA-class II alleles with risk of relapse in myeloperoxidase-antineutrophil cytoplasmic antibody positive vasculitis in the Japanese population

Author:

Kawasaki Aya,Sada Ken-ei,Kusumawati Premita Ari,Hirano Fumio,Kobayashi Shigeto,Nagasaka Kenji,Sugihara Takahiko,Ono Nobuyuki,Fujimoto Takashi,Kusaoi Makio,Tamura Naoto,Kusanagi Yasuyoshi,Itoh Kenji,Sumida Takayuki,Yamagata Kunihiro,Hashimoto Hiroshi,Makino Hirofumi,Arimura Yoshihiro,Harigai Masayoshi,Tsuchiya Naoyuki

Abstract

BackgroundDisease relapse remains a major problem in the management of antineutrophil cytoplasmic antibody (ANCA)-associated vasculitis (AAV). In European populations, HLA-DPB1*04:01 is associated with both susceptibility and relapse risk in proteinase 3-ANCA positive AAV. In a Japanese population, we previously reported an association between HLA-DRB1*09:01 and DQB1*03:03 with susceptibility to, and DRB1*13:02 with protection from, myeloperoxidase-ANCA positive AAV (MPO-AAV). Subsequently, the association of DQA1*03:02, which is in strong linkage disequilibrium with DRB1*09:01 and DQB1*03:03, with MPO-AAV susceptibility was reported in a Chinese population. However, an association between these alleles and risk of relapse has not yet been reported. Here, we examined whether HLA-class II is associated with the risk of relapse in MPO-AAV.MethodsFirst, the association of HLA-DQA1*03:02 with susceptibility to MPO-AAV and microscopic polyangiitis (MPA) and its relationship with previously reported DRB1*09:01 and DQB1*03:03 were examined in 440 Japanese patients and 779 healthy controls. Next, the association with risk of relapse was analyzed in 199 MPO-ANCA positive, PR3-ANCA negative patients enrolled in previously reported cohort studies on remission induction therapy. Uncorrected P values (Puncorr) were corrected for multiple comparisons in each analysis using the false discovery rate method.ResultsThe association of DQA1*03:02 with susceptibility to MPO-AAV and MPA was confirmed in a Japanese population (MPO-AAV: Puncorr=5.8x10-7, odds ratio [OR] 1.74, 95% confidence interval [CI] 1.40–2.16, MPA: Puncorr=1.1x10-5, OR 1.71, 95%CI 1.34–2.17). DQA1*03:02 was in strong linkage disequilibrium with DRB1*09:01 and DQB1*03:03, and the causal allele could not be determined using conditional logistic regression analysis. Relapse-free survival was shorter with nominal significance in carriers of DRB1*09:01 (Puncorr=0.049, Q=0.42, hazard ratio [HR]:1.87), DQA1*03:02 (Puncorr=0.020, Q=0.22, HR:2.11) and DQB1*03:03 (Puncorr=0.043, Q=0.48, HR:1.91) than in non-carriers in the log-rank test. Conversely, serine carriers at position 13 of HLA-DRβ1 (HLA-DRβ1_13S), including DRB1*13:02 carriers, showed longer relapse-free survival with nominal significance (Puncorr=0.010, Q=0.42, HR:0.31). By combining DQA1*03:02 and HLA-DRβ1_13S, a significant difference was detected between groups with the highest and lowest risk for relapse (Puncorr=0.0055, Q=0.033, HR:4.02).ConclusionHLA-class II is associated not only with susceptibility to MPO-AAV but also with risk of relapse in the Japanese population.

Funder

Japan Agency for Medical Research and Development

Ministry of Health, Labour and Welfare

Japan Society for the Promotion of Science

Bristol-Myers Squibb

Ichiro Kanehara Foundation for the Promotion of Medical Sciences and Medical Care

Takeda Science Foundation

Uehara Memorial Foundation

Publisher

Frontiers Media SA

Subject

Immunology,Immunology and Allergy

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