407 BD patients and 679 healthy controls were enrolled, and genotyped by Sequenom MassArray system (Sequenom iPLEX assay, San Diego, CA).
The frequency of risk allele of rs1800871 was notably higher in BD patients than in controls (71.9% vs. 66.2%, OR: 1.30, 95%CI: 1.08-1.58, pc = 0.024). Similarly, rs1518111, which showed strong linkage disequilibrium (r2 = 1) with allele rs1800871, was also associated with BD (pc = 0.026). Rs3021094 was in association with BD in a dominant model (pc = 0.035), and the haplotype (GACC) formed by rs1518111, rs3021094, rs3790622, and rs1800871 was associated with BD (pc = 0.023). Results obtained from meta-analysis combined with our data showed that rs1800871 and rs1518111 were associated with BD.
IL10 may be the susceptibility gene for BD in Chinese Han population.