Multi-ancestry genome-wide association analyses identify novel genetic mechanisms in rheumatoid arthritis

Nat Genet. 2022 Nov;54(11):1640-1651. doi: 10.1038/s41588-022-01213-w. Epub 2022 Nov 4.


Rheumatoid arthritis (RA) is a highly heritable complex disease with unknown etiology. Multi-ancestry genetic research of RA promises to improve power to detect genetic signals, fine-mapping resolution and performances of polygenic risk scores (PRS). Here, we present a large-scale genome-wide association study (GWAS) of RA, which includes 276,020 samples from five ancestral groups. We conducted a multi-ancestry meta-analysis and identified 124 loci (P < 5 × 10-8), of which 34 are novel. Candidate genes at the novel loci suggest essential roles of the immune system (for example, TNIP2 and TNFRSF11A) and joint tissues (for example, WISP1) in RA etiology. Multi-ancestry fine-mapping identified putatively causal variants with biological insights (for example, LEF1). Moreover, PRS based on multi-ancestry GWAS outperformed PRS based on single-ancestry GWAS and had comparable performance between populations of European and East Asian ancestries. Our study provides several insights into the etiology of RA and improves the genetic predictability of RA.

Publication types

  • Meta-Analysis
  • Research Support, N.I.H., Extramural
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adaptor Proteins, Signal Transducing / genetics
  • Arthritis, Rheumatoid* / genetics
  • Asian People / genetics
  • Genetic Predisposition to Disease
  • Genome-Wide Association Study*
  • Humans
  • Polymorphism, Single Nucleotide / genetics


  • TNIP2 protein, human
  • Adaptor Proteins, Signal Transducing