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Screening of herbal compounds for their activities in inducing CYP1A2 in Fa2N-4 cells. Cells were pre-treated with candidate compounds at 10 μM. CYP1A2 mRNA was quantified by real-time PCR. con: control (negative control); 1: omeprazole (positive control); 2: kaempferide; 3: catalpol; 4: isorhamnetin; 5: ferulic acid; 6: ligustrazine; 7: astragaloside; 8: baicalin. *** p < 0.001 versus the negative control.
