Figure 4.
(A,B) Action of the methanolic extract-R4, at 10 ppm, in human keratinocytes (SIK 28) after 2 h of incubation, in absence and in presence of TCDD or PZ or FICZ or IND. The vertical axis represents the CYP1A1 mRNA induction measured by using RT-PCR. The solvent was dimethylsulfoxide (DMSO). Results are expressed as means ± SD. The bar means followed by the same letter (as superscript) are not statistically different at p ≤ 0.01.