Molecular basis for increased susceptibility of Indigenous North Americans to seropositive rheumatoid arthritis.Scally, S.W., Law, S.C., Ting, Y.T., Heemst, J.V., Sokolove, J., Deutsch, A.J., Bridie Clemens, E., Moustakas, A.K., Papadopoulos, G.K., Woude, D.V., Smolik, I., Hitchon, C.A., Robinson, D.B., Ferucci, E.D., Bernstein, C.N., Meng, X., Anaparti, V., Huizinga, T., Kedzierska, K., Reid, H.H., Raychaudhuri, S., Toes, R.E., Rossjohn, J., El-Gabalawy, H., Thomas, R.
(2017) Ann. Rheum. Dis. 76: 1915-1923
- PubMed: 28801345
- DOI: 10.1136/annrheumdis-2017-211300
- Primary Citation of Related Structures:
- PubMed Abstract:
The pathogenetic mechanisms by which <i>HLA-DRB1 </i> alleles are associated with anticitrullinated peptide antibody (ACPA)-positive rheumatoid arthritis (RA) are incompletely understood. RA high-risk <i>HLA-DRB1 </i> alleles are known to share a c ...
The pathogenetic mechanisms by which HLA-DRB1 alleles are associated with anticitrullinated peptide antibody (ACPA)-positive rheumatoid arthritis (RA) are incompletely understood. RA high-risk HLA-DRB1 alleles are known to share a common motif, the 'shared susceptibility epitope (SE)'. Here, the electropositive P4 pocket of HLA-DRB1 accommodates self-peptide residues containing citrulline but not arginine. HLA-DRB1 His/Phe13β stratifies with ACPA-positive RA, while His13βSer polymorphisms stratify with ACPA-negative RA and RA protection. Indigenous North American (INA) populations have high risk of early-onset ACPA-positive RA, whereby HLA-DRB1*04:04 and HLA-DRB1*14:02 are implicated as risk factors for RA in INA. However, HLA-DRB1*14:02 has a His13βSer polymorphism. Therefore, we aimed to verify this association and determine its molecular mechanism.
Department of Biochemistry and Molecular Biology, Infection and Immunity Program, Biomedicine Discovery Institute Monash University, Clayton, Australia.,Arthritis Research UK Centre for Genetics and Genomics, University of Manchester, Manchester, UK.,Institute of Infection and Immunity, Cardiff University School of Medicine, Heath Park, Cardiff, UK.,Program in Medical and Population Genetics, Broad Institute of MIT and Harvard, Cambridge, USA.,Department of Rheumatology, Leiden University Medical Center, Leiden, The Netherlands.,Division of Community Health Services, Alaska Native Tribal Health Consortium, Anchorage, Alaska, USA.,Arthritis Centre, University of Manitoba, Winnipeg, Manitoba, Canada.,Faculty of Agricultural Technology, Technological Educational Institute of Ionian Islands, Argostoli Kefalonia, Greece.,Center for Data Sciences, Brigham and Women's Hospital, Boston, Massachusetts, USA.,Department of Microbiology and Immunology, The University of Melbourne, Peter Doherty Institute for Infection and Immunity, Melbourne, Australia.,Division of Genetics, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts, USA.,Australian Research Council Centre of Excellence in Advanced Molecular Imaging, Monash University, Clayton, Australia.,Department of Medicine/Immunology and Rheumatology, Stanford University, VA Palo Alto Health Care System, Palo Alto, California.,Laboratory of Biochemistry and Biophysics, Faculty of Agricultural Technology, Epirus Institute of Technology, Arta, Greece.,The University of Queensland Diamantina Institute, Translational Research Institute, Princess Alexandra Hospital, Brisbane, Australia.,Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, USA.