PMID- 23587914 OWN - NLM STAT- MEDLINE DCOM- 20130711 LR - 20130517 IS - 1879-0038 (Electronic) IS - 0378-1119 (Linking) VI - 523 IP - 1 DP - 2013 Jul 1 TI - Interleukin-18 gene polymorphisms and rheumatoid arthritis: a meta-analysis. PG - 27-32 LID - S0378-1119(13)00427-7 [pii] LID - 10.1016/j.gene.2013.03.132 [doi] AB - Interleukin-18 (IL-18) is a member of the IL-1 superfamily that enhances both innate and acquired immune responses. IL-18 is highly expressed in sera, synovial fluids and synovial tissues of patients with RA, and these IL-18 levels are correlated with RA disease activity, indicating an important role of IL-18 in the pathogenesis of RA. Several studies have examined the association of IL-18 gene polymorphisms with RA, but these studies have shown inconclusive and controversial results. To verify the association between IL-18 gene polymorphism and susceptibility to RA, we conducted a meta-analysis of all relevant reports cited in MEDLINE/PubMed before October 2012. A meta-analysis on the association between the IL-18 rs1946518 SNP and RA was performed for 2944 patients with RA and 2377 controls from 7 published studies and a meta-analysis on the association between the IL-18 rs187238 SNP and RA was performed for 1319 patients with RA and 1211 controls from 5 published studies. In addition, 2 studies involving 1873 RA patients and 1092 controls were considered in the meta-analysis of the association between the IL-18 rs360722 SNP and RA. No significant association was found between two IL-18 SNPs (rs1946518 and rs187238) and RA susceptibility in all subjects. In subgroup analysis stratified by ethnicity, there was still no significant association between these two IL-18 SNPs and RA susceptibility. However, the frequency of the T allele at rs360722 was found to be significantly lower in patients with RA compared with controls, although this finding was based on only 2 studies. The results of our meta-analysis suggest that IL-18 rs360722 SNP is only associated with RA susceptibility. However, due to only two studies included in our meta-analysis, large-scale well designed studies should be considered in future studies to confirm the exact role of IL-18 rs360722 SNP in RA susceptibility. CI - Copyright (c) 2013 Elsevier B.V. All rights reserved. FAU - Ji, Jong Dae AU - Ji JD AD - Rheumatology, College of Medicine, Korea University, 126-1, Anam-Dong 5-Ga, Sungbuk-Ku, Seoul 136-705, South Korea. jjdjmesy@korea.ac.kr FAU - Lee, Won Jin AU - Lee WJ LA - eng PT - Journal Article PT - Meta-Analysis PT - Research Support, Non-U.S. Gov't DEP - 20130413 PL - Netherlands TA - Gene JT - Gene JID - 7706761 RN - 0 (Interleukin-18) SB - IM MH - Alleles MH - Arthritis, Rheumatoid/ethnology/*genetics MH - Databases, Factual MH - Gene Frequency MH - Genetic Association Studies/methods MH - Genetic Predisposition to Disease MH - Genetics, Population/methods MH - *Genome, Human MH - Humans MH - Interleukin-18/*genetics MH - Odds Ratio MH - *Polymorphism, Single Nucleotide MH - Publication Bias EDAT- 2013/04/17 06:00 MHDA- 2013/07/13 06:00 CRDT- 2013/04/17 06:00 PHST- 2012/11/12 00:00 [received] PHST- 2013/03/17 00:00 [revised] PHST- 2013/03/27 00:00 [accepted] PHST- 2013/04/17 06:00 [entrez] PHST- 2013/04/17 06:00 [pubmed] PHST- 2013/07/13 06:00 [medline] AID - S0378-1119(13)00427-7 [pii] AID - 10.1016/j.gene.2013.03.132 [doi] PST - ppublish SO - Gene. 2013 Jul 1;523(1):27-32. doi: 10.1016/j.gene.2013.03.132. Epub 2013 Apr 13.