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Deprecated: Implicit conversion from float 278.79999999999995 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Oncotarget 2016 ; 7 (16): 21315-31 Nephropedia Template TP
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Metformin inhibits 17?-estradiol-induced epithelial-to-mesenchymal transition via ?Klotho-related ERK1/2 signaling and AMPK? signaling in endometrial adenocarcinoma cells #MMPMID26824324
Liu Z; Qi S; Zhao X; Li M; Ding S; Lu J; Zhang H
Oncotarget 2016[Apr]; 7 (16): 21315-31 PMID26824324show ga
The potential role of metformin in treating endometrial cancer remains to be explored. The current study investigated the role of metformin in 17?-estradiol-induced epithelial-mesenchymal transition (EMT) in endometrial adenocarcinoma cells. We found that 17?-estradiol promoted proliferation and migration, attenuated apoptosis in both estrogen receptor (ER) positive and ER negative endometrial adenocarcinoma cells (Ishikawa and KLE cells, respectively). Metformin abolished 17?-estradiol-induced cell proliferation and reversed 17?-estradiol-induced EMT in Ishikawa cells. In addition, metformin increased the expression of ?Klotho, a fibroblast growth factors (FGFs) coreceptor, and decreased ERK1/2 phosphorylation in both Ishikawa and KLE cells. Decreased expression of ?Klotho was noted in human endometrial adenocarcinomas, and plasmid-driven expression of ?Klotho in Ishikawa cells abolished 17?-estradiol-induced EMT via inhibiting ERK1/2 signaling. ?Klotho expression and metformin show synergetic effects on the proliferation and the EMT in Ishikawa cells. Furthermore, we demonstrated that the anti-EMT effects of metformin could be partly abolished by introducing Compound C, a specific AMPK? signaling inhibitor. In conclusion, metformin abolishes 17?-estradiol-induced cell proliferation and EMT in endometrial adenocarcinoma cells by upregulating ?Klotho expression, inhibiting ERK1/2 signaling, and activating AMPK? signaling. Our study provides novel mechanistic insight into the anti-tumor effects of metformin.