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2017 ; 14
(4
): 4053-4058
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Long non-coding RNA MEG3 inhibits the proliferation and metastasis of oral
squamous cell carcinoma by regulating the WNT/?-catenin signaling pathway
#MMPMID28959364
Liu Z
; Wu C
; Xie N
; Wang P
Oncol Lett
2017[Oct]; 14
(4
): 4053-4058
PMID28959364
show ga
This study aimed to investigate how long non-coding RNA (lncRNA) maternally
expressed gene 3 (MEG3) inhibits the growth and metastasis of oral squamous cell
carcinoma (OSCC) by regulating WNT/?-catenin signaling pathway in order to
explore the antitumor effect of MEG3 and to provide a potential molecular target
for the treatment of OSCC. The RT-qPCR technique was used to quantitatively
analyze the expression of MEG3 in cancer and adjacent tissues collected from the
patients after surgery. Using the Lipofectamine method, the MEG3 overexpression
vector and the siRNA interference vector were constructed and transfected into
SCC15 and Cal27 cells, respectively, followed by cell proliferation, apoptosis
and metastasis analyses. The semi-quantitative analysis of the expression of the
?-catenin protein in transfected cells was performed by the western blot
analysis, and the activity of the WNT/?-catenin signaling pathway was analyzed
using the TOP/FOP flash reporters. In addition, the cells were treated with
decitabine to investigate the correlation between the MEG3 expression and the DNA
methylation. Results showed that the expression level of MEG3 was significantly
decreased in OSCC (p<0.05) and overexpression of MEG3 inhibited the proliferation
and metastasis of cancer cells and promoted apoptosis. Importantly, MEG3 played a
role as a tumor suppressor by inhibiting the WNT/?-catenin signaling pathway. In
addition, the expression of the MEG3 was significantly affected by the degree of
DNA methylation. It was concluded that the lncRNA MEG3 can inhibit the growth and
metastasis of OSCC by negatively regulating the WNT/?-catenin signaling pathway.