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HLA-DRB1*03:01 and HLA-DRB1*04:01 modify the presentation and outcome in autoimmune hepatitis type-1

  • N M F van Gerven
  • , Y S de Boer
  • , A Zwiers
  • , B J Verwer
  • , J P H Drenth
  • , B van Hoek
  • , K J van Erpecum
  • , U Beuers
  • , H R van Buuren
  • , J W den Ouden
  • , R C Verdonk
  • , G H Koek
  • , J T Brouwer
  • , M M J Guichelaar
  • , J M Vrolijk
  • , M J Coenraad
  • , G Kraal
  • , C J J Mulder
  • , C M J van Nieuwkerk
  • , E Bloemena
  • H W Verspaget, V Kumar, A Zhernakova, C Wijmenga, L Franke, G Bouma,

Research output: Contribution to journalArticleAcademicpeer-review

Abstract

The classical human leukocyte antigen (HLA)-DRB1*03:01 and HLA-DRB1*04:01 alleles are established autoimmune hepatitis (AIH) risk alleles. To study the immune-modifying effect of these alleles, we imputed the genotypes from genome-wide association data in 649 Dutch AIH type-1 patients. We therefore compared the international AIH group (IAIHG) diagnostic scores as well as the underlying clinical characteristics between patients positive and negative for these HLA alleles. Seventy-five percent of the AIH patients were HLA-DRB1*03:01/HLA-DRB1*04:01 positive. HLA-DRB1*03:01/HLA-DRB1*04:01-positive patients had a higher median IAIHG score than HLA-DRB1*03:01/HLA-DRB1*04:01-negative patients (P<0.001). We did not observe associations between HLA alleles and alanine transaminase levels (HLA-DRB1*03:01: P=0.2; HLA-DRB1*04:01; P=0.5); however, HLA-DRB1*03:01 was independently associated with higher immunoglobulin G levels (P=0.04). The HLA-DRB1*04:01 allele was independently associated with presentation at older age (P=0.03) and a female predominance (P=0.04). HLA-DRB1*03:01-positive patients received immunosuppressive medication and liver transplantation. In conclusion, the HLA-DRB1*03:01 and HLA-DRB1*04:01 alleles are both independently associated with the aggregate diagnostic IAIHG score in type-1 AIH patients, but are not essential for AIH development. HLA-DRB1*03:01 is the strongest genetic modifier of disease severity in AIH.

Original languageEnglish
Pages (from-to)247-52
Number of pages6
JournalGenes and Immunity
Volume16
Issue number4
DOIs
Publication statusPublished - Jun 2015

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