Objective: One of the most common malignancies among men is prostate cancer. Ellagic acid (EA), a polyphenol antioxidant, has many pharmacological actions, especially anticancer effects. The purpose of this study was to evaluate the effect of EA treatment on interleukin-6 (IL-6) gene expression, cell viability, IL-6 secretion, phosphorylated STAT3, ERK, and AKT cellular signaling proteins in human prostate cancer cells (PC3).
Materials And Methods: The cytotoxic effects of the EA (0-100 µM) on PC3 cells were determined by 3-(4, 5-dimethylthiazol-2-yl)-2, 5-diphenyltetrazolium bromide assay. IL-6 gene expression was down, using real-time quantitative polymerase chain reaction. The cellular concentration of phosphorylated ERK1/2, AKT, and STAT3 signaling pathways was assessed by Western blotting technic.
Results: EA treatment of PC3 cells resulted in a reduction of cell viability and phosphorylated STAT3, ERK, and AKT signaling proteins after 72 h in a dose-dependent manner. IL-6 gene expression and IL-6 levels significantly increased (P < 0.05) in a dose-dependent pattern in treated PC3 with EA. Thus, these data suggested the essential role of signaling proteins in EA-mediated anti-proliferation of PC3 cells.
Conclusions: Our finding shows that EA can be considered as a potent agent that decreases cell proliferation through a reduction of phosphorylated STAT3, ERK, and AKT cellular signaling proteins.
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