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12 December 2016 : Laboratory Research  

Inhibition of Cervical Cancer by Promoting IGFBP7 Expression Using Ellagic Acid from Pomegranate Peel

Hongjun Guo1ABCDEFG, Dongya Zhang1CDE*, Qingrui Fu1BF

DOI: 10.12659/MSM.898658

Med Sci Monit 2016; 22:4881-4886

Abstract

BACKGROUND: The aim of this study was to explore the mechanism by which cervical cancer is inhibited by promoting IGFBP7 expression using ellagic acid from pomegranate peel extract.

MATERIAL AND METHODS: HeLa cells were divided into 6 groups: control group (NC), blank control group (BL), and IGFBP7 overexpression group (IGFBP7), and 2.5 uM, 5. 0 uM, and 10.0 uM ellagic acid-treated groups. The cell proliferation ability was detected and the degree of invasion in the 6 groups was measured by Transwell assay. The expression levels of IGFBP7 and AKT/mTOR in the 6 groups of cells were detected by RT-PCR technique.

RESULTS: Compared with NC and BL groups, The IGFBP7 gene expressions of the IGFPB7 and ellagic acid-treated groups were significantly increased (P<0.05). There was a dose-effect dependence in the ellagic acid-treated groups. The invasion ability of the IGFBP7 group and ellagic acid-treated groups was significantly lower than that of NC and BL groups in HeLa cells (P<0.05). The apoptosis rate of the IGFBP7 group and ellagic acid-treated groups was significantly higher than that of the NC and BL groups in HeLa cells (P<0.05). AKT and mTOR mRNA and protein expressions of the IGFBP7 group and ellagic acid-treated groups were significantly lower than that of the NC and BL groups (P<0.05). There was a dose-effect dependence in the ellagic acid-treated groups.

CONCLUSIONS: The ellagic acid in pomegranate peel extract can inhibit the AKT/mTOR signaling pathway by enhancing the expression level of IGFBP7, which can inhibit the HeLa cells in cervical cancer.

Keywords: Cell Proliferation - drug effects, Ellagic Acid - pharmacology, Hela Cells, Insulin-Like Growth Factor Binding Proteins - biosynthesis, Plant Extracts - pharmacology, Punicaceae - chemistry, Signal Transduction - drug effects, Uterine Cervical Neoplasms - prevention & control

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Medical Science Monitor eISSN: 1643-3750
Medical Science Monitor eISSN: 1643-3750