HepD cells were treated with 0, 20 and 50 µg/mL Im. (A) Effects of Im on the expression of apoptosis-related proteins B-cell lymphoma-2 (Bcl-2), Bcl-2-Associated X protein (Bax), PARP, cl-PARP, caspase-3, caspase-9, cleaved caspase-9 and Cytochrome c) in HepD cells. HepD cells were treated with 0, 20 and 50 µg/mL Im for 24 h and the expression levels of Bcl-2, Bax, PARP, cl-PARP, caspase-3, caspase-9, cleaved caspase-9 and Cytochrome c (Cyt c) were examined by western blot analysis. (B) The statistics graph shows the expression of these proteins corresponding to A. Data represent means ± S.D. of three independent experiments. **: p < 0.01 and ***: p < 0.001 compared with cells treated with 0 µg/mL Im.