IL-6-Induced pSTAT3 Luciferase Assay. The stable cell line expressing pSTAT3-luciferase was established as described previously.23 Hep3B cells expressing pSTAT3-luciferase were seeded into
96-well culture plates, 2 × 104 cells/well, and cultured for 24 h. After this, the culture medium was replaced with serum-free medium, and the cells were then treated with IL-6 (10 ng/mL) with the absence or presence of samples for 12 h.