PMID- 19730377 OWN - NLM STAT- MEDLINE DCOM- 20100304 LR - 20111117 IS - 1531-6963 (Electronic) IS - 1040-8711 (Linking) VI - 21 IP - 6 DP - 2009 Nov TI - An update on the immunogenetics of idiopathic inflammatory myopathies: major histocompatibility complex and beyond. PG - 588-93 LID - 10.1097/BOR.0b013e3283315a22 [doi] AB - PURPOSE OF REVIEW: To update the reader on immunogenetic advances in idiopathic inflammatory myopathy (IIM) over the past 18 months. RECENT FINDINGS: In Caucasian IIM, despite a shared association with the human leukocyte antigen (HLA) 8.1 ancestral haplotype (HLA-DRB1*03-DQA1*05-DQB1*02), anti-Jo-1 and anti-PM-Scl antibody-positive cases have differing IIM clinical phenotypes. A study of the HLA-DPB1 region has shown that DPB1*0101 is associated with anti-Jo-1 positivity but not with anti-PM-Scl. IIM single nucleotide polymorphism studies have demonstrated associations in the protein tyrosine phosphatase, nonreceptor type 22, tumour necrosis factor alpha and interleukin-1 genes. The GM 13 allotype has been confirmed as a risk factor in Caucasian IIM. In inclusion body myositis, the HLA 8.1 ancestral haplotype may not only influence disease susceptibility but also disease expression. A follow-up study including a meta-analysis of the apolipoprotein E gene in inclusion body myositis suggests that this gene does not confer risk of disease. SUMMARY: Although a substantial part of the genetic risk for developing adult and juvenile IIM lies within the major histocompatibility complex, recent research suggests that genetic regions outside of the major histocompatibility complex are also potentially involved in conferring IIM disease susceptibility, although with more modest effect sizes. An ongoing and internationally coordinated IIM genome-wide association scan may provide further insights into IIM immunogenetics. FAU - Chinoy, Hector AU - Chinoy H AD - The University of Manchester Rheumatic Diseases Centre, Salford Royal NHS Foundation Trust, Salford, UK. FAU - Lamb, Janine A AU - Lamb JA FAU - Ollier, William E R AU - Ollier WE FAU - Cooper, Robert G AU - Cooper RG LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PT - Review PL - United States TA - Curr Opin Rheumatol JT - Current opinion in rheumatology JID - 9000851 RN - 0 (Apolipoprotein E4) RN - 0 (Cytokines) RN - 0 (HLA-DP Antigens) RN - 0 (HLA-DP beta-Chains) RN - 0 (HLA-DPB1 antigen) RN - 0 (HLA-DR Antigens) RN - 0 (HLA-DRB1 Chains) RN - 0 (Immunoglobulin Gm Allotypes) SB - IM MH - Adult MH - Apolipoprotein E4/genetics MH - Child MH - Cytokines/genetics MH - Genetic Predisposition to Disease MH - HLA-DP Antigens/genetics MH - HLA-DP beta-Chains MH - HLA-DR Antigens/genetics MH - HLA-DRB1 Chains MH - Humans MH - Immunogenetic Phenomena MH - Immunoglobulin Gm Allotypes/genetics MH - *Major Histocompatibility Complex MH - Myositis/*genetics/*immunology MH - Myositis, Inclusion Body/genetics/immunology MH - Polymorphism, Single Nucleotide RF - 39 EDAT- 2009/09/05 06:00 MHDA- 2010/03/05 06:00 CRDT- 2009/09/05 06:00 PHST- 2009/09/05 06:00 [entrez] PHST- 2009/09/05 06:00 [pubmed] PHST- 2010/03/05 06:00 [medline] AID - 10.1097/BOR.0b013e3283315a22 [doi] PST - ppublish SO - Curr Opin Rheumatol. 2009 Nov;21(6):588-93. doi: 10.1097/BOR.0b013e3283315a22.