Deprecated: Implicit conversion from float 231.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 231.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 231.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 231.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 231.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 231.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 231.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 265.2 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 265.2 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 265.2 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 265.2 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 265.2 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Warning: imagejpeg(C:\Inetpub\vhosts\kidney.de\httpdocs\phplern\28337662
.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 Breast+Cancer+Res+Treat
2017 ; 163
(3
): 449-460
Nephropedia Template TP
gab.com Text
Twit Text FOAVip
Twit Text #
English Wikipedia
A83-01 inhibits TGF-?-induced upregulation of Wnt3 and epithelial to mesenchymal
transition in HER2-overexpressing breast cancer cells
#MMPMID28337662
Wu Y
; Tran T
; Dwabe S
; Sarkissyan M
; Kim J
; Nava M
; Clayton S
; Pietras R
; Farias-Eisner R
; Vadgama JV
Breast Cancer Res Treat
2017[Jun]; 163
(3
): 449-460
PMID28337662
show ga
PURPOSE: The aim of this study is to investigate the mechanisms of interactions
between TGF-? and Wnt/?-catenin pathways that induce and regulate EMT and promote
breast cancer cells to become resistant to treatment. METHODS: The effect of
TGF-? on Wnt/?-catenin signaling pathway was examined by using a human
Wnt/?-catenin-regulated cDNA plate array and western blot analysis. The
interaction of Twist at promoter of Wnt3 was examined by chromatin
immunoprecipitation (ChIP) assay. Secreted Wnt3 level was determined by ELISA
assay. RESULTS: HER2-overexpressing breast cancer cells treated with TGF-? have a
reduced response to trastuzumab and exhibited EMT-like phenotype. The
TGF-?-induced EMT in HER2-cells was concordant with upregulation of Wnt3 and
?-catenin pathways. The TGF-?-induced induction of Wnt3 during EMT was found to
be Smad3-dependent. ChIP analysis identified occupancy of Twist at promoter
region of Wnt3. Knock-down of Twist by shRNA confirmed the significance of Twist
in response to TGF-? regulating Wnt3 during EMT. Subsequently, TGF-?-induced
matrix metalloproteinases, MMP1, MMP7, MMP9, MMP26, Vascular endothelial growth
factors (VEGF), and activation of Wnt/?-catenin signaling were repressed by the
shRNA treatment. TGF-?R1 ALK5 kinase inhibitor, A83-01 can effectively prevent
the TGF-?-induced Twist and Wnt3. Co-treating A83-01 and trastuzumab inhibited
TGF-?-induced cell invasion significantly in both trastuzumab responsive and
resistant cells. CONCLUSIONS: Our data demonstrated an important interdependence
between TGF-? and Wnt/?-catenin pathways inducing EMT in HER2-overexpressing
breast cancer cells. Twist served as a linkage between the two pathways during
TGF-?-induced EMT. A83-01 could inhibit the TGF-?-initiated pathway interactions
and enhance HER2-cells response to trastuzumab treatment.