Comprehensive assessment of the association between genes on JAK-STAT pathway (IFIH1, TYK2, IL-10) and systemic lupus erythematosus: a meta-analysis

Previous studies have reported that genes relating to JAK-STAT pathway (IFIH1, TYK2 and IL-10) conferred the susceptibility to SLE. In this study, we performed a meta-analysis (including 43 studies) to evaluate the association between IFIH1 (9288 patients and 24,040 controls), TYK2 (4928 patients and 11,536 controls), IL-10 (3623 patients and 4907 controls) polymorphisms and systemic lupus erythematosus (SLE) in a comprehensive way. We found that IFIH1 rs1990760_T allele was associated with risk of SLE in overall population under three models (allelic: P=2.56 x 10(-11), OR 1.135, 95% CI 1.094-1.179, dominant: P=1.8 x 10(-8), OR 1.203, 95% CI 1.128-1.284, recessive: P =2.6 x 10(-7), OR 1.163, 95% CI 1.098-1.231). A strong association had been observed between TYK2 polymorphism rs2304256_Callele and SLE in Europeans (P =5.82 x 10(-5), OR 1.434, 95% CI 1.203-1.710). When coming to overall population, TYK2 rs2304256_C showed a significant association with SLE under recessive model (P = 8.05 x 10(-3), OR 1.314, 95% CI 1.074-1.608). However, the other two SNPs (rs12720270, rs280519) of TYK2 were not significant. The results also indicated an association between IL-10 rs1800896_G allele and SLE in Asians under recessive model (P =4.65 x 10(-3), OR 2.623, 95% CI 1.346-5.115), while, IL-10 rs1800896_G had a trend of association with SLE in European population in dominant model (P =1.21 x 10(-2), OR 1.375, 95% CI 1.072-1.764). In addition, we found IL-10 rs1800896 GG homozygote might be associated with increased susceptibility to SLE (GG vs AA, P=4.65 x 10(-3), OR 1.539, 95% CI 1.142-2.072). We concluded that IFIH1 rs1990760_T and TYK2 rs2304256_C alleles were significantly associated with SLE, and IL-10 rs1800896 GG homozygote might have an enhancement effect on SLE risk.