Downregulation of HER2/neu receptor by solamargine enhances anticancer drug-mediated cytotoxicity in breast cancer cells with high-expressing HER2/neu

doi:10.1007/s10565-007-9010-5

CNU IR > Pharmacy and Science > Dept. of Cosmetic Science and institute of cosmetic science > Periodical Articles > Item 310902800/21562

Please use this identifier to cite or link to this item: https://ir.cnu.edu.tw/handle/310902800/21562

Title:	Downregulation of HER2/neu receptor by solamargine enhances anticancer drug-mediated cytotoxicity in breast cancer cells with high-expressing HER2/neu
Authors:	Shiu, L. Y. Liang, C. H. Huang, Y. S. Sheu, H. M. Kuo, K. W.
Contributors:	化粧品應用與管理系
Keywords:	Solamargine HER2/neu Topoisomerase II Methotrexate 5-Fluorouracil Cisplatin
Date:	2008-01
Issue Date:	2009-07-20 11:08:22 (UTC+8)
Publisher:	Springer
Abstract:	Overexpression of HER2/neu is associated with drug resistance and poor outcome in breast cancer. Solamargine (SM), a glycoalkaloid purified from the herb Solanum incanum, exhibits HER2/neu gene modulation of HER2/neu high-expressing human breast cancer cell line ZR-75-1. SM downregulation of HER2/neu gene expression was determined by RT-PCR and Southern hybridization. Additionally, the membrane-bound HER2/neu receptor in highly HER2/neu-expressing breast cancer cells was determined by radioimmunoassay, immunocytochemistry, fluorescent immunocytochemistry, and flow cytometry. SM significantly decreased the number of HER2/neu receptors on the cell membrane. Methotrexate (MTX), 5-florouracil (5-Fu), and cisplatin (CDDP) are commonly used for breast carcinoma treatment in clinics; however, patients with HER2/neu overexpression exhibit resistance to these anticancer drugs. Notably, combination of MTX, 5-Fu, and CDDP with SM individually increased the susceptibility of breast cancer cells to these chemotherapeutic agents. Experimental results indicated that downregulation of HER2/neu by SM might be an effective strategy for enhancing drug susceptibility of breast cancer cells expressing high levels of HER2/neu.
Relation:	Cell biology and toxicology 24(1)：p.1-10
Appears in Collections:	[Dept. of Cosmetic Science and institute of cosmetic science] Periodical Articles

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