alexa Green tea polyphenol epigallocatechin-3 gallate inhibits Her-2 neu signaling, proliferation, and transformed phenotype of breast cancer cells.
Oncology

Oncology

Journal of Carcinogenesis & Mutagenesis

Author(s): Pianetti S, Guo S, Kavanagh KT, Sonenshein GE

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Abstract Overexpression of the epidermal growth factor receptor family member Her-2/neu in breast cancer is associated with poor prognosis. With evidence accumulating for a chemopreventive role of green tea polyphenols, the effects of epigallocatechin-3 gallate (EGCG) on Her-2/neu-overexpressing breast cancer cells were examined. EGCG inhibited mouse mammary tumor virus (MMTV)-Her-2/neu NF639 cell growth in culture and soft agar. EGCG reduced signaling via the phosphatidylinositol 3- kinase, Akt kinase to NF-kappaB pathway because of inhibition of basal Her-2/neu receptor tyrosine phosphorylation. EGCG similarly inhibited basal receptor phosphorylation in SMF and Ba/F3 2 + 4 cells, which suggests the potential beneficial use of EGCG in adjuvant therapy of tumors with Her-2/neu overexpression.
This article was published in Cancer Res and referenced in Journal of Carcinogenesis & Mutagenesis

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