Interaction between ERAP1 and HLA-B27 in ankylosing spondylitis implicates peptide handling in the mechanism for HLA-B27 in disease susceptibility

David M. Evans, Chris C.A. Spencer, Jennifer J. Pointon, Zhan Su, David Harvey, Grazyna Kochan, Udo Opperman, Alexander Dilthey, Matti Pirinen, Millicent A. Stone, Louise Appleton, Loukas Moutsianis, Stephen Leslie, Tom Wordsworth, Tony J. Kenna, Tugce Karaderi, Gethin P. Thomas, Michael M. Ward, Michael H. Weisman, Claire FarrarLinda A. Bradbury, Patrick Danoy, Robert D. Inman, Walter Maksymowych, Dafna Gladman, Proton Rahman, Ann Morgan, Helena Marzo-Ortega, Paul Bowness, Karl Gaffney, J. S.Hill Gaston, Malcolm Smith, Jacome Bruges-Armas, Ana Rita Couto, Rosa Sorrentino, Fabiana Paladini, Manuel A. Ferreira, Huji Xu, Yu Liu, Lei Jiang, Carlos Lopez-Larrea, Roberto Díaz-Peña, Antonio Lóepez-Vázquez, Tetyana Zayats, Gavin Band, Céline Bellenguez, Hannah Blackburn, Jenefer M. Blackwell, Elvira Bramon, Suzannah J. Bumpstead

570 Citations (Scopus)

Abstract

Ankylosing spondylitis is a common form of inflammatory arthritis predominantly affecting the spine and pelvis that occurs in approximately 5 out of 1,000 adults of European descent. Here we report the identification of three variants in the RUNX3, LTBR-TNFRSF1A and IL12B regions convincingly associated with ankylosing spondylitis (P < 5 × 10-8 in the combined discovery and replication datasets) and a further four loci at PTGER4, TBKBP1, ANTXR2 and CARD9 that show strong association across all our datasets (P < 5 × 10-6 overall, with support in each of the three datasets studied). We also show that polymorphisms of ERAP1, which encodes an endoplasmic reticulum aminopeptidase involved in peptide trimming before HLA class I presentation, only affect ankylosing spondylitis risk in HLA-B27-positive individuals. These findings provide strong evidence that HLA-B27 operates in ankylosing spondylitis through a mechanism involving aberrant processing of antigenic peptides.

Original languageEnglish
JournalNature Genetics
Volume43
Issue number8
Pages (from-to)761-767
Number of pages7
ISSN1061-4036
DOIs
Publication statusPublished - 1 Aug 2011
Externally publishedYes

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