Epidermal growth factor promotes transforming growth factor-ß1-induced epithelial-mesenchymal transition in HK-2 cells through a synergistic effect on Snail.
Mol Biol Rep
; 41(1): 241-50, 2014 Jan.
Article
en En
| MEDLINE
| ID: mdl-24203464
ABSTRACT
Epithelial-mesenchymal transition (EMT) is a central mechanism for wound healing, tissue repair, organ fibrosis and carcinoma progression in adults. Evidence shows that both epidermal growth factor (EGF) and transforming growth factor-ß1 (TGF-ß1) are upregulated during renal interstitial fibrosis, and that co-stimulation of EGF and TGF-ß1 could induce renal tubular epithelial cells to undergo EMT more effectively than EGF or TGF-ß1 alone. This study was intended to explore the molecular mechanism underlying this effect. HK-2 cells underwent apparent EMT with increased cell motility after co-stimulation of EGF and TGF-ß1 as compared with TGF-ß1 or EGF alone. Co-stimulation of EGF and TGF-ß1 resulted in rapid and robust ERK1/2 activation and induced persistent high expression of Snail protein. Treatment with the MEK inhibitor U0126 followed by co-stimulation with EGF and TGF-ß1 prevented the upregulation of Snail protein, EMT and motility, without impairing Snail mRNA. TGF-ß1 induced Snail at the transcriptional level, which was not influenced by EGF. Inhibition of Snail expression by siRNA interference also prevented EMT caused by co-stimulation of EGF and TGF-ß1. These data suggest that EGF promotes TGF-ß1-induced EMT through a synergistic effect on Snail at the post-transcriptional level in HK-2 cells.
Texto completo:
1
Colección:
01-internacional
Banco de datos:
MEDLINE
Asunto principal:
Factores de Transcripción
/
Factor de Crecimiento Epidérmico
/
Factor de Crecimiento Transformador beta1
/
Transición Epitelial-Mesenquimal
Límite:
Humans
Idioma:
En
Revista:
Mol Biol Rep
Año:
2014
Tipo del documento:
Article
País de afiliación:
China