PMID:
Molecules. 2019 Aug 9 ;24(16). Epub 2019 Aug 9. PMID: 31404982
Abstract Title:
The Inhibitory Effect of (-)-Epigallocatechin-3-Gallate on Breast Cancer Progression via ReducingMethylation and DNMT Activity.
Abstract:
Epigenetic modifications are important mechanisms responsible for cancer progression. Accumulating data suggest that (-)-epigallocatechin-3-gallate (EGCG), the most abundant catechin of green tea, may hamper carcinogenesis by targeting epigenetic alterations. We found that signal peptide-CUB (complement protein C1r/C1s, Uegf, and Bmp1)-EGF (epidermal growth factor) domain-containing protein 2 (), a tumor suppressor gene, was hypermethylated in breast tumors. However, it is unknown whether EGCG regulatesmethylation, and the mechanisms remain undefined. This study was designed to investigate the effect of EGCG onmethylation in breast cancer cells. We reveal that EGCG possesses a significantly inhibitory effect on cell viability in a dose- and time-dependent manner and presents more effects than other catechins. EGCG treatment resulted in enhancement of thegene, along with elevated E-cadherin and decreased vimentin expression, leading to significant suppression of cell migration and invasion. The inhibitory effect of EGCG onknock-down cells was remarkably alleviated. Further study demonstrated that EGCG significantly decreased themethylation status by reducing DNA methyltransferase (DNMT) expression and activity. In summary, this study reported for the first time thatmethylation can be reversed by EGCG treatment, finally resulting in the inhibition of breast cancer progression. These results suggest the epigenetic role of EGCG and its potential implication in breast cancer therapy.
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