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Green tea (-)-epigallocatechin gallate induced growth inhibition of human placental choriocarcinoma cells.
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- Author(s): Shih, Li-Jane; Lin, Yu-Ren; Lin, Cheng-Kuo; Liu, Hang-Shen; Kao, Yung-Hsi
- Source:
Placenta; May2016, Vol. 41, p1-9, 9p- Subject Terms:
- Source:
- Additional Information
- Abstract: This study investigated the pathways involved in the effect of green tea epigallocatechin gallate (EGCG) on mitogenesis in BeWo, JEG-3, and JAR placental choriocarcinoma cells. EGCG inhibited cell proliferation in dose-dependent and time-dependent manners, as indicated by the number of cells and incorporation of bromodeoxyuridine (BrdU). A catechin-specific effect of green tea was evident; EGCG was more effective than epicatechin, epicatechin gallate, and epigallocatechin in suppressing cell growth. When all three of the mitogen-activated protein kinase (MAPK) subfamilies, i.e., ERK, p38, and JNK, were examined, EGCG significantly increased levels of phospho-ERK1/2 (pERK1/2) and phospho-p38 (pp38) and did not alter the total protein levels of ERK1/2, p38 MAPK, JNK, and phospho-JNK. EGCG-induced increases in the levels of pERK1/2 and pp38 proteins were prevented by pre-treatment with specific inhibitors of ERK1/2 MAPK and p38 MAPK, respectively. These inhibitors also suppressed EGCG-induced decreases in both cell number and BrdU incorporation. Moreover, pre-treatment with an AMP-activated protein kinase (AMPK) inhibitor prevented the actions of EGCG on proliferation and AMPK phosphorylation. These data suggest that EGCG mediates choriocarcinoma cell growth via the AMPK, ERK, and p38 pathways, but not JNK pathway. [ABSTRACT FROM AUTHOR]
- Abstract: Copyright of Placenta is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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