Research Article

Rhein Induces Apoptosis in Human Breast Cancer Cells

Figure 7

Effect of rhein on in vivo signal pathways in human breast cancer cells. MCF-7/VEC and MCF-7/HER2 cells were transiently co-transfected with cis-reporter plasmids (pAP1-Luc, pNF-κB-Luc, and p53-Luc) and an internal control reporter (pRluc-C1), and then treated with rhein for 24 h. Firefly and Renilla Luciferase enzymes were measured; the relative firefly luciferase activity was normalized by Renilla Luciferase. * ; ** compared with untreated cells.
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