Association between BLK polymorphisms and susceptibility to SLE

초록

Objective This study aimed to explore whether B‑cell lymphocyte kinase (BLK) polymorphisms are associated with susceptibility to systemic lupus erythematosus (SLE) in ethnically diverse populations. Methods We conducted a meta-analysis of the association between the BLK rs13277113 A/G, rs2736340 T/C, rs2248932 T/C, and rs2618476 G/A polymorphisms and SLE. Results Seventeen studies with 22,701 patients and 36,365 controls were included in the meta-analysis. The meta-analysis revealed a significant association between SLE and the BLK rs13277113 A allele (OR = 1.359, 95 % CI = 1.292–1.429, p < 1.0 × 10−8), and stratification by ethnicity indicated an association between this allele and SLE in Caucasians, Asians, and Africans (OR = 1.315, 95 % CI = 1.252–1.380, p < 1.0 × 10−8; OR = 1.415, 95 % CI = 1.287–1.555, p < 1.0 × 10−8; OR = 1.361, 95 % CI = 1.194–1.550, p = 3.6 × 10−6). A significant association between SLE and the rs2736340 T allele (OR = 1.354, 95 % CI = 1.286–1.426, p < 1.0 × 10−8) was also observed, and stratification by ethnicity indicated an association between the risk allele and SLE in Caucasians and Asians (OR = 1.333, 95 % CI = 1.259–1.412, p < 1.0 × 10−8; OR = 1.525, 95 % CI = 1.339–1.736, p < 1.0 × 10−8). Meta-analysis also revealed a significant association between SLE and the BLK alleles rs2248932 T and rs2618476 G (OR = 1.285 95 % CI = 1.228–1.345, p < 1.0 × 10−8; OR = 1.374, 95 % CI = 1.294–1.468, p < 1.0 × 10−8), and stratification by ethnicity indicated an association between these alleles and SLE in Caucasians and Asians. Conclusions This meta-analysis confirms that polymorphisms in the BLK alleles rs13277113 A/G, rs2736340 T/C, and rs2248932 T/C are associated with susceptibility to SLE in Caucasian and Asian populations.

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