[Association of single nucleotide polymorphism in human CYP8B1 gene with gallstone disease].

Objective: To identify the single nucleotide polymorphisms of human CYP8B1gene and explore the association of some of these SNPs with gallstone disease in Chinese population.

Methods: The exon and part of promoter were sequenced by a fluorescent labeling automatic method to identify and characterize the SNPs in Chinese population. For SNPs with an allelic frequency of over 10%, a case-control study was performed in patients and controls.

Results: Eleven SNPs were found within a 5119 bp region. Among them, 1 was in coding region, 5 in promoter and 5 in 3'-UTR. There were 3 novel SNPs and 12 SNPs in SNP database were not found. The allelic frequency of rs3732860 polymorphism showed a significant difference (P = 0.022) in the association study. The subjects with A allele had a significantly lower frequency of gallstone disease than those with G allele (OR = 1.465, 95%CI 1.055 - 2.034, P = 0.023).

Conclusion: SNP rs3732860 of CYP8B1 gene is associated with gallstone disease in Chinese population. And A allele may play a protective role in the pathogenesis of gallstone.