In Vitro and In Vivo Effects of Xanthorrhizol on Human Breast Cancer MCF-7 Cells Treated With Tamoxifen

• Main Authors: Nattanant Noomhorm (Author), Chun-Ju Chang (Author), Che-Sheng Wen (Author), Jir-You Wang (Author), Jiun-Liang Chen (Author), Ling-Ming Tseng (Author), Wei-Shone Chen (Author), Jen-Hwey Chiu (Author), Yi-Ming Shyr (Author)
• Format: Book
• Published: Elsevier, 2014-01-01T00:00:00Z.
• Subjects: article
• Online Access: Connect to this object online.

Summary

Abstract.: This study investigated the herb-drug interaction of xanthorrhizol and tamoxifen in human breast cancer cells. Using MCF-7 cell line as an in vitro model, the herb-drug interaction between xanthorrhizol and tamoxifen was measured by MTT assay, luciferase reporter assay, and cell cycle analysis. The effects of xanthorrhizol on growth/autophagy related signaling were determined by immunostaining, western blotting, and real time RT-PCR. Additionally, the in vivo effect of xanthorrhizol and tamoxifen on athymic nude mice implanted with MCF-7 cells was evaluated. When MCF-7 cells were co-treated with tamoxifen and xanthorrhizol, there were no significant changes in terms of cell number, luciferase activity, percentage S-phase cells and LC3-II expression. However, using the MCF-7 implanted nude mice model, it was possible to detect significantly increased tumor volumes, a larger tumor size, and increased protein expression of P38 and P27(Kip1) in the xanthorrhizol + tamoxifen group compared to the tamoxifen-alone group. It can be concluded that while there is no significant herb-drug interaction between xanthorrhizol and tamoxifen in vitro, there is such an interaction in tumor-bearing mice, which provides important information that affects breast cancer treatment translational research. Keywords:: breast cancer, tamoxifen, interaction, xanthorrhizol

Item Description

1347-8613
10.1254/jphs.14024FP