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Meta-Analysis
. 2018 Jun 7;13(6):e0198693.
doi: 10.1371/journal.pone.0198693. eCollection 2018.

Meta-analyses of IL1A Polymorphisms and the Risk of Several Autoimmune Diseases Published in Databases

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Free PMC article
Meta-Analysis

Meta-analyses of IL1A Polymorphisms and the Risk of Several Autoimmune Diseases Published in Databases

Hang Su et al. PLoS One. .
Free PMC article

Abstract

Background: Based on published data, we aimed to quantitatively elucidate the possible genetic influence of rs17561 G/T and rs1800587 C/T polymorphisms of the IL1A (interleukin 1 alpha) gene in the susceptibility to several autoimmune diseases.

Methods: A series of meta-analyses were carried out. After database searching, we utilized our inclusion/exclusion criteria to screen and include the eligible studies. Passociation (P value of association test), Bonferroni-corrected Passociation value; false discovery rate (FDR)-corrected Passociation, ORs (odd ratios), and 95% CI (confidence interval) were generated to assess the magnitudes of genetic relationships.

Results: A total of 35 eligible articles were included. Pooled analysis data of both rs17561 G/T and rs1800587 C/T in the overall population indicated a negative association between cases of autoimmune diseases and negative controls (all Passociation>0.05, Bonferroni-corrected Passociation>0.05, FDR-corrected Passociation>0.05). Similar results were found in most subgroup analyses (all Passociation>0.05, Bonferroni-corrected Passociation>0.05, FDR-corrected Passociation>0.05), apart from the rs1800587 in the Graves' disease subgroup, which showed an increased risk in some cases, compared with controls, under the models of allele T vs. C, carrier T vs. C, CT+TT vs. CC, and CT vs. CC (all Passociation<0.05, Bonferroni-corrected Passociation<0.05, FDR-corrected Passociation>0.05, OR>1).

Conclusion: Based on the available data, C/T genotype of the rs1800587 polymorphism within IL1A gene may be associated with an increased Graves' disease risk. We did not see evidence regarding a positive role for rs1800587 or rs17561 in the risk of other autoimmune diseases, such as systemic sclerosis or rheumatoid arthritis. These conclusions still merit further data support and molecular exploration.

Conflict of interest statement

The authors have declared that no competing interests exist.

Figures

Fig 1
Fig 1. Flow diagram of database searching and article screening.
Fig 2
Fig 2. Meta-analysis of the IL1A rs17561 G/T polymorphism and the risk of autoimmune diseases under allele T vs. G model.
Fig 3
Fig 3. Subgroup analysis by disease type of the association between IL1A rs1800587 C/T polymorphism and the risk of autoimmune diseases under allele T vs. C model.
Fig 4
Fig 4. Begg’s test and Egger’s test for the allele T vs. C model of IL1A rs1800587 C/T polymorphism.
(A) Begg’s test; (B) Egger’s test.
Fig 5
Fig 5. Sensitivity analysis for the allele T vs. C model of IL1A rs1800587 C/T polymorphism.

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Grant support

The author(s) received no specific funding for this work.
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