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2017 ; 37
(2
): 713-720
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Transforming growth factor-?1 suppresses bone morphogenetic protein-2-induced
mesenchymal-epithelial transition in HSC-4 human oral squamous cell carcinoma
cells via Smad1/5/9 pathway suppression
#MMPMID28035402
Chiba T
; Ishisaki A
; Kyakumoto S
; Shibata T
; Yamada H
; Kamo M
Oncol Rep
2017[Feb]; 37
(2
): 713-720
PMID28035402
show ga
Squamous cell carcinoma is the most common cancer in the oral cavity. We
previously demonstrated that transforming growth factor-?1 (TGF-?1) promotes the
epithelial-mesenchymal transition (EMT) of human oral squamous cell
carcinoma (hOSCC) cells; however, it remains to be clarified whether the TGF-?
superfamily member bone morphogenetic protein (BMP) affects this process in hOSCC
cells. Here, we examined the independent and collective effects of TGF-?1 and
BMP-2 on EMT and mesenchymal?epithelial transition (MET) in a panel of four hOSCC
cell lines. Notably, we found that HSC-4 cells were the most responsive to BMP-2
stimulation, which resulted in the upregulation of Smad1/5/9 target genes such as
the MET inducers ID1 and cytokeratin 9 (CK9). Furthermore, BMP-2 downregulated
the mesenchymal marker N-cadherin and the EMT inducer Snail, but upregulated
epithelial CK9 expression, indicating that BMP-2 prefers to induce MET rather
than EMT. Moreover, TGF-?1 dampened BMP-2-induced epithelial gene expression by
inhibiting Smad1/5/9 expression and phosphorylation. Functional analysis revealed
that TGF-?1 and BMP-2 significantly enhanced HSC-4 cell migration and
proliferation, respectively. Collectively, these data suggest that TGF-?
positively regulates hOSCC invasion in the primary tumor, whereas BMP-2
facilitates cancer cell colonization at secondary metastatic sites. Thus, the
invasive and metastatic characteristics of hOSCC appear to be reciprocally
regulated by BMP and TGF-?.
|Apoptosis/drug effects
[MESH]
|Blotting, Western
[MESH]
|Bone Morphogenetic Protein 2/*pharmacology
[MESH]