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Abstract Title:

In vitro antiproliferative and antioxidant effects of urolithin A, the colonic metabolite of ellagic acid, on hepatocellular carcinomas HepG2 cells.

Abstract Source:

Toxicol In Vitro. 2015 Aug ;29(5):1107-15. Epub 2015 Apr 21. PMID: 25910917

Abstract Author(s):

Yun Wang, Zhenpeng Qiu, Benhong Zhou, Cong Liu, Jinlan Ruan, Qiujin Yan, Jianming Liao, Fan Zhu

Article Affiliation:

Yun Wang

Abstract:

The intestinal metabolites of ellagic acid (EA), urolithins are known to effectively inhibit cancer cell proliferation. This study investigates antiproliferative and antioxidant effects of urolithin A (UA) on cell survival of the HepG2 hepatic carcinomas cell line. The antiproliferative effects of UA (0-500μM) on HepG2 cells were determined using a CCK assay following 12-36h exposure. Effects on β-catenin and other factors of expression were assessed by using real-time PCR and Western blot. We found that UA showed potent antiproliferative activity on HepG2 cells. When cell death was induced by UA, it was found that the expression of β-catenin, c-Myc and Cyclin D1 were decreased and TCF/LEF transcriptional activation was notably down-regulated. UA also increased protein expression of p53, p38-MAPK and caspase-3, but suppressed expression of NF-κB p65 and other inflammatory mediators. Furthermore, the antioxidant assay afforded by UA and EA treatments was associated with decreases in intracellular ROS levels, and increases in intracellular SOD and GSH-Px activity. These results suggested that UA could inhibit cell proliferation and reduce oxidative stress status in liver cancer, thus acting as a viably effective constituent for HCC prevention and treatment.

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Sayer Ji
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