Association between genetic variants in CYP2E1 and CTRC genes and susceptibility to alcoholic pancreatitis: A systematic review and meta-analysis

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BackgroundGenetic predisposition plays an important role in the development of alcoholic pancreatitis (AP), with previous studies suggesting that genetics variants in certain genes, such asCYP2E1 and CTRC, partially explain individual susceptibility to this disease. Therefore, the aim of this work was to conduct a systematic review and meta-analysis of existing studies that analyzed how polymorphisms within CYP2E1 and CTRC genes influence the risk of AP. Material and methodsWe performed a systematic review of studies that analyzed the genotype distribution of CYP2E1 and CTRC allelic variants among patients with AP and a group of controls. A meta-analysis was conducted using a random effects model. Odds ratios (ORs) and their confidence intervals (CIs) were calculated. ResultsThe T allele of theCTRC 180 C > T variant was significantly more prevalent among patients with AP compared to all controls (OR = 1.79, 95% CI = 1.43–2.24; P < 0.00001) and healthy subjects (OR = 1.84, 95% CI = 1.46–2.31; P < 0.00001). The Trp variant of CTRC Arg254Trp polymorphism was also more prevalent in patients with AP; however, these results were not significant after excluding one study. We found no clear evidence that CYP2E1-DraI or of CYP2E1-RsaI/PstI polymorphisms modulate the risk of developing AP. ConclusionsOur meta-analysis supports that the T allele ofCTRC 180C > T polymorphisms modulates the risk of alcoholic pancreatitis. No clear evidence was found for the remaining SNPs being associated with this disease.