Figure 2.

Relative gene expression ratios for the CYP1A1 and AhR mRNAs in TCDD-treated AC16 cardiomyocytes. The cells were pre-treated with various concentrations of TCDD for 24 h. P<0.05 for the expression level of CYP1A1 in each treatment group when compared with the cells that were incubated with only culture medium (*P<0.05 vs. untreated cells); ^#P<0.05 for the expression level of AhR in each treatment group when compared with the cells that were incubated with culture medium alone (^#P<0.05 vs. untreated cells). ArH, aryl hydrocarbon receptor; TCDD, 2,3,7,8-tetrachlorodibenzo-p-dioxin.