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2017 ; 8
(49
): 85224-85233
Nephropedia Template TP
Oncotarget
2017[Oct]; 8
(49
): 85224-85233
PMID29156715
show ga
Ovarian low-grade serous carcinoma (LGSC) is a rare disease and is now considered
to be a distinct entity from high-grade serous carcinoma (HGSC), which is the
most common and malignant form of epithelial ovarian cancer. Connective tissue
growth factor (CTGF) is a secreted matricellular protein that has been shown to
modulate many biological functions by interacting with multiple molecules in the
microenvironment. Increasing evidence indicates that aberrant expression of CTGF
is associated with cancer development and progression. Transforming growth
factor-?1 (TGF-?1) is a well-known molecule that can strongly up-regulate CTGF
expression in different types of normal and cancer cells. Our previous study
demonstrated that TGF-?1 induces apoptosis of LGSC cells. However, the effect of
TGF-?1 on CTGF expression in LGSC needs to be defined. In addition, whether CTGF
mediates TGF-?1-induced LGSC cell apoptosis remains unknown. In the present
study, we show that TGF-?1 treatment up-regulates CTGF expression by activating
SMAD3 signaling in two human LGSC cell lines. Additionally, siRNA-mediated CTGF
knockdown attenuates TGF-?1-induced cell apoptosis. Moreover, our results show
that the inhibitory effect of the CTGF knockdown on TGF-?1-induced cell apoptosis
is mediated by down-regulating SMAD3 expression. This study demonstrates an
important role for CTGF in mediating the pro-apoptotic effects of TGF-?1 on LGCS.