The association between the single nucleotide polymorphism rs762551 in the cytochrome P450 family 1, subfamily A2 gene (CYP1A2) and caffeine consumption remains controversial. We conducted a meta-analysis to clarify this potential association. Twelve studies were selected from articles retrieved from the and Google Scholar databases, and the data were analyzed to determine the odds ratio (OR) of genotypes AA (conferring fast caffeine metabolism) vs AC + CC (conferring slow caffeine metabolism).
To date, no study has investigated the association between CYP1A2-163C/A polymorphism and bladder cancer risk in a Chinese population. Here, we extracted genomic DNA from peripheral white blood cells, and differentiated CYP1A2 alleles by polymerase chain reaction-based restriction fragment length polymorphism methods. Differences in genotype frequencies between the cases and controls were evaluated using a chi-square test. The odds ratio (OR) and its 95% confidence interval (CI) were calculated using an unconditional logistic regression model.
The objective of this study was to evaluate the genotype and allelic frequencies of CYP1A2 in Chinese patients with acute liver injury induced by Polygonum multiflorum. We examined the clinical mechanism of acute liver injury induced by P. multiflorum. According to the diagnostic criteria for drug-induced liver injury (DILI), 43 cases of P. multiflorum-induced liver injury admitted to the First Affiliated Hospital, Zhejiang University were identified between January 2008 and December 2012.