Clinical rheumatology
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Clinical rheumatology · Apr 2015
Meta AnalysisMeta-analysis of associations between functional prolactin -1149 G/T polymorphism and susceptibility to rheumatoid arthritis and systemic lupus erythematosus.
The aim of this study was to determine whether the prolactin -1149 G/T polymorphism confers susceptibility to systemic lupus erythematous (SLE) and rheumatoid arthritis (RA). A meta-analysis was conducted for examining the associations between prolactin -1149 G/T polymorphism and susceptibility to SLE or RA using allele contrast, recessive and dominant models, and homozygote contrast. A total of 10 comparative studies, consisting of 4 SLE and 6 RA studies, involving 4252 patients and 4949 controls, were included in the meta-analysis. ⋯ After stratification by ethnicity, the G allele was found to be significantly associated with RA in Caucasians (OR = 1.112, 95 % CI = 1.041-1.189, p = 0.002). Furthermore, the prolactin -1149 G/T polymorphism was found to be associated with RA in Caucasians under the dominant model and under homozygote contrast. This meta-analysis demonstrates that the prolactin -1149 G/T polymorphism is associated with susceptibility to RA, but not SLE, in Caucasians.