Figure 4

PG and PD increase LDLR protein levels by inactivation of IDOL mRNA in hepatic cell lines. (A) SNU-387 and Hep3B cells were treated with 2.5 μM PD and 250 μg/mL PG for 24 h. Cell lysates were analyzed by western blotting with anti-LDLR and anti-GAPDH antibodies. (C) Hepatic cells were co-transfected with and pLDLR-Luc and pRL-TK vector for 24 h followed by treatment with 2.5 μM PD and 250 μg/mL PG for 24 h. Luciferase activity was measured and normalized by Renilla luciferase expression. (B, D) Hepatic cells were treated with 2.5 μM PD and 250 μg/mL PG for 24 h. LDLR (B) and IDOL (D) mRNA expression was analyzed by real-time PCR. The data represent mean ± SD of three independent experiments. *P < 0.05 by one-way ANOVA with Tukey’s post hoc test.