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.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 PLoS+One
2015 ; 10
(9
): e0137486
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gab.com Text
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English Wikipedia
Enhanced Expression of Integrin ?v?3 Induced by TGF-? Is Required for the
Enhancing Effect of Fibroblast Growth Factor 1 (FGF1) in TGF-?-Induced
Epithelial-Mesenchymal Transition (EMT) in Mammary Epithelial Cells
#MMPMID26334633
Mori S
; Kodaira M
; Ito A
; Okazaki M
; Kawaguchi N
; Hamada Y
; Takada Y
; Matsuura N
PLoS One
2015[]; 10
(9
): e0137486
PMID26334633
show ga
Epithelial-to-mesenchymal transition (EMT) plays a critical role in cancer
metastasis, and is regulated by growth factors such as transforming growth factor
? (TGF-?) and fibroblast growth factors (FGF) secreted from the stromal and tumor
cells. However, the role of growth factors in EMT has not been fully established.
Several integrins are upregulated by TGF-?1 during EMT. Integrins are involved in
growth factor signaling through integrin-growth factor receptor crosstalk. We
previously reported that FGF1 directly binds to integrin ?v?3 and the interaction
was required for FGF1 functions such as cell proliferation and migration. We
studied the role of ?v?3 induced by TGF-? on TGF-?-induced EMT. Here, we describe
that FGF1 augmented EMT induced by TGF-?1 in MCF10A and MCF12A mammary epithelial
cells. TGF-?1 markedly amplified integrin ?v?3 and FGFR1 (but not FGFR2). We
studied if the enhancing effect of FGF1 on TGF-?1-induced EMT requires enhanced
levels of both integrin ?v?3 expression and FGFR1. Knockdown of ?3 suppressed the
enhancement by FGF1 of TGF-?1-induced EMT in MCF10A cells. Antagonists to FGFR
suppressed the enhancing effect of FGF1 on EMT. Integrin-binding defective FGF1
mutant did not augment TGF-?1-induced EMT in MCF10A cells. These findings suggest
that enhanced integrin ?v?3 expression in addition to enhanced FGFR1 expression
is critical for FGF1 to augment TGF-?1-induced EMT in mammary epithelial cells.