Association between bile salt export pump polymorphisms and intrahepatic cholestasis of pregnancy susceptibility: a meta-analysis of case-control studies

Abstract The purpose of this meta-analysis was to investigate the relationship between bile salt export pump (BSEP) polymorphisms and intrahepatic cholestasis of pregnancy (ICP) susceptibility. Retrieved studies from Pubmed, EMBASE, Web of Science, Cochrane Library and CBM databases about BSEP polymorphisms and ICP susceptibility were included. Odds ratio (OR) and 95% confidence interval (CI) and publication bias were calculated. Ten related case-control studies on BSEP polymorphisms and ICP susceptibility were included. The pooled results showed a significant association between BSEP rs2287622 polymorphism and ICP risk in Asian population (OR >1, p < .01 for A vs. a and AA vs. Aa/aa) and general population (OR >1, p < .05 for A vs. a, Aa vs. aa, AA/Aa vs. aa), and a borderline statistical significance was found between BSEP rs473351 polymorphism and ICP susceptibility (OR = 1.66, p < .05), and no statistical significance was found in D482G or rs853782 polymorphisms and ICP risk (all p > .05). Additionally, no publication bias was found in these studies (all p > .05). Our current meta-analysis indicated that BSEP rs2287622 polymorphism could increase the susceptibility of ICP in Asians and in general populations, while rs473351, D482G, and rs853782 polymorphisms were not obviously associated with ICP risk, but it needs further larger study with ethnicity and various etiologies.

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