PMID- 22835281 OWN - NLM STAT- MEDLINE DCOM- 20130429 LR - 20220330 IS - 1399-0039 (Electronic) IS - 0001-2815 (Linking) VI - 80 IP - 2 DP - 2012 Aug TI - New insights into the genetics of immune responses in rheumatoid arthritis. PG - 105-18 LID - 10.1111/j.1399-0039.2012.01939.x [doi] AB - Rheumatoid arthritis (RA) is a common autoimmune disease with a strong genetic component. Numerous aberrant immune responses have been described during the evolution of the disease. In later years, the appearance of anti-citrullinated protein antibodies (ACPAs) has become a hallmark for the diagnosis and prognosis of RA. The post-translational transformation of arginine residues of proteins and peptides into citrulline (citrullination) is a natural process in the body, but for unknown reasons autoreactivity towards citrullinated residues may develop in disposed individuals. ACPAs are often found years before clinical manifestations. ACPAs are present in about 70% of RA patients and constitute an important disease marker, distinguishing patient groups with different prognoses and different responses to various treatments. Inside the human leukocyte antigen (HLA) region, some HLA-DRB1 alleles are strongly associated with their production. Genome-wide association studies in large patient cohorts have defined a great number of single nucleotide polymorphisms (SNPs) outside of the HLA region that are associated with ACPA positive (ACPA+) RA. The SNPs are generally located close to or within genes involved in the immune response or signal transduction in immune cells. Some environmental factors such as tobacco smoking are also positively correlated with ACPA production. In this review, we will describe the genes and loci associated with ACPA+ RA or ACPA- RA and attempt to clarify their potential role in the development of the disease. CI - (c) 2012 John Wiley & Sons A/S. FAU - Ruyssen-Witrand, A AU - Ruyssen-Witrand A AD - INSERM, UMR1027, Toulouse, France. FAU - Constantin, A AU - Constantin A FAU - Cambon-Thomsen, A AU - Cambon-Thomsen A FAU - Thomsen, M AU - Thomsen M LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PT - Review PL - England TA - Tissue Antigens JT - Tissue antigens JID - 0331072 RN - 0 (Autoantibodies) RN - 0 (Biomarkers) RN - 0 (HLA-DRB1 Chains) RN - 29VT07BGDA (Citrulline) SB - IM MH - Arthritis, Rheumatoid/*genetics/immunology MH - Autoantibodies/biosynthesis/*immunology MH - Autoimmunity/genetics MH - Biomarkers/metabolism MH - Citrulline/*immunology/metabolism MH - Gene Expression/immunology MH - Genetic Loci/immunology MH - Genome-Wide Association Study MH - HLA-DRB1 Chains/*genetics/immunology MH - Humans MH - Polymorphism, Single Nucleotide/genetics/immunology MH - Protein Processing, Post-Translational/genetics/*immunology MH - Risk Factors MH - Signal Transduction/genetics/immunology EDAT- 2012/07/28 06:00 MHDA- 2013/04/30 06:00 CRDT- 2012/07/28 06:00 PHST- 2012/07/28 06:00 [entrez] PHST- 2012/07/28 06:00 [pubmed] PHST- 2013/04/30 06:00 [medline] AID - 10.1111/j.1399-0039.2012.01939.x [doi] PST - ppublish SO - Tissue Antigens. 2012 Aug;80(2):105-18. doi: 10.1111/j.1399-0039.2012.01939.x.