Epidemiology and health-related services: Edited by Dan Solomon and Robert PlengeRecent advances in the genetics of rheumatoid arthritisRaychaudhuri, SoumyaAuthor Information Division of Rheumatology, Immunology, and Allergy, Brigham and Women's Hospital, Boston, Massachusetts, USA Correspondence to Soumya Raychaudhuri, Division of Rheumatology, Immunology, and Allergy, PBB-B3, Brigham and Women's Hospital, Boston, MA 02115, USA Tel: +1 617 714 7835; e-mail: s[email protected] Current Opinion in Rheumatology: March 2010 - Volume 22 - Issue 2 - p 109-118 doi: 10.1097/BOR.0b013e328336474d Buy Metrics Abstract Purpose of review To review the recently discovered genetic risk loci in rheumatoid arthritis (RA), the pathways they implicate, and the genetic architecture of RA. Recent findings Since 2008 investigators have identified many common genetic variants that confer disease risk through single nucleotide polymorphism genotyping studies; the list of variants will no doubt continue to expand at a rapid rate as genotyping technologies evolve and case–control sample collections continue to grow. In aggregate, these variants implicate pathways leading to NF-κB (nuclear factor kappa-light-chain-enhancer of activated B cells) activation, the interluekin-2 signaling pathway, and T-cell activation. Summary Although the effect of any individual variant is modest and even in aggregate considerably less than that of the major histocompatability complex, discovery of recent risk variants suggests immunological processes that are involved in disease pathogenesis. © 2010 Lippincott Williams & Wilkins, Inc.