Fine-Mapping the Genetic Association of the Major Histocompatibility Complex in Multiple Sclerosis: HLA and Non-HLA Effects

Nikolaos A. Patsopoulos, Lisa F. Barcellos, Rogier Q. Hintzen, Catherine Schaefer, Cornelia M. van Duijn, Janelle A. Noble, Towfique Raj, Pierre Antoine Gourraud, Barbara Elaine Stranger, Jorge Oksenberg, Tomas Olsson, Bruce V. Taylor, Stephen Sawcer, David A. Hafler, Mary Carrington, Philip L. De Jager*, Paul I.W. de Bakker, Luisa Bernardinelli, David Booth, Manuel ComabellaAlastair Compston, Sandra D'Alfonso, Bertrand Fontaine, An Goris, Jonathan Haines, Hanne Harbo, Steve Hauser, Clive Hawkins, Bernhard Hemmer, Adrian Ivinson, Christina Lill, Roland Martin, Filippo Martinelli-Boneschi, Annette Oturai, Aarno Palotie, Margaret PericakVance, Janna Saarela, Graeme Stewart, Frauke Zipp, Rodney J. Scott, Jeannette Lechner-Scott, Pablo Moscato, David R. Booth, Graeme J. Stewart, Robert N. Heard, Deborah Mason, Lyn Griffiths, Simon Broadley, Matthew A. Brown, Mark Slee, Simon J. Foote, Jim Stankovich, Bruce V. Taylor, James Wiley, Melanie Bahlo, Victoria Perreau, Judith Field, Helmut Butzkueven, Trevor J. Kilpatrick, Justin Rubio, Mark Marriott, William M. Carroll1, Allan G. Kermode

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

145 Scopus citations

Abstract

The major histocompatibility complex (MHC) region is strongly associated with multiple sclerosis (MS) susceptibility. HLA-DRB1*15:01 has the strongest effect, and several other alleles have been reported at different levels of validation. Using SNP data from genome-wide studies, we imputed and tested classical alleles and amino acid polymorphisms in 8 classical human leukocyte antigen (HLA) genes in 5,091 cases and 9,595 controls. We identified 11 statistically independent effects overall: 6 HLA-DRB1 and one DPB1 alleles in class II, one HLA-A and two B alleles in class I, and one signal in a region spanning from MICB to LST1. This genomic segment does not contain any HLA class I or II genes and provides robust evidence for the involvement of a non-HLA risk allele within the MHC. Interestingly, this region contains the TNF gene, the cognate ligand of the well-validated TNFRSF1A MS susceptibility gene. The classical HLA effects can be explained to some extent by polymorphic amino acid positions in the peptide-binding grooves. This study dissects the independent effects in the MHC, a critical region for MS susceptibility that harbors multiple risk alleles.

Original languageEnglish (US)
Article numbere1003926
JournalPLoS genetics
Volume9
Issue number11
DOIs
StatePublished - Nov 1 2013

ASJC Scopus subject areas

  • Ecology, Evolution, Behavior and Systematics
  • Molecular Biology
  • Genetics
  • Genetics(clinical)
  • Cancer Research

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