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. 2014 Oct 1;33(10):652–666. doi: 10.1089/dna.2014.2366

FIG. 3.

FIG. 3.

FIG. 3.

FIG. 3.

Tazarotene-induced activation of the caspase-8-truncated Bid (tBid) cascade and the effects of the caspase-8 inhibitor Z-IETD-FMK in BCC cells. (A) The cells were treated with indicated concentrations of tazarotene for 24 h. Total cell lysates were prepared, resolved by SDS-PAGE, and immunoblotted with the indicated antibodies to detect the non-cleaved and cleaved forms of caspase-8, Bid, and truncated Bid. (B) The bands were analyzed by ImageJ and normalized to actin. The means±SD of the three independent experiments are presented in the bar graph. nsp>0.05, *p<0.05, **p<0.01, and ***p<0.001, compared with the 0.1% DMSO-treated group. (C) The reverse effect of the caspase-8 inhibitor on 100 μM tazarotene-induced reduction in cell viability. The data represent the means±SD from three wells. The data are representative of three independent experiments with similar results. (D) The sub-G1 population, (E) caspase and (G) Bid cleavage, and cytosolic cytochrome c expression are presented. (F, H) The bands were analyzed by ImageJ and normalized to actin. The means±SD of the three independent experiments are presented in the bar graph. #p<0.05, ##p<0.01, and ###p<0.001, compared with the 100 μM tazarotene-treated group.