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2017 ; 51
(1
): 115-127
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CUEDC2 suppresses glioma tumorigenicity by inhibiting the activation of STAT3 and
NF-?B signaling pathway
#MMPMID28534933
Li F
; Tang C
; Jin D
; Guan L
; Wu Y
; Liu X
; Wu X
; Wu QY
; Gao D
Int J Oncol
2017[Jul]; 51
(1
): 115-127
PMID28534933
show ga
CUEDC2, a CUE domain containing 2 protein, plays critical roles in many
biological processes, such as cell cycle, inflammation and tumorigenesis.
However, whether CUEDC2 was involved in tumorigenesis of glioma and the possible
mechanism remains to be elucidated. In the present study, our results implied
that the expression of CUEDC2 was lower in the glioma tissue and glioma cell
lines than that of normal tissue and asctrocyte cells. Downregulation of
endogenous CUEDC2 in glioma U251 cell lines by RNAi promoted the tumor cells
proliferation, migration, invasion and glioma neurosphere formation, while,
overexpression of CUEDC2 showed the opposite effect. Further studies showed that
overexpression of CUEDC2 suppressed the activation and nuclear translocation of
phosphorylated-STAT3 (p-STAT3) but the level of p-STAT3 increased after
interfering with the expression of CUEDC2. Moreover, CUEDC2 expression has an
inhibitory effect on the activation of NF-?B. Thus, our studies suggested that
the decreased expression of CUEDC2 in glioma led to the activation of
transcription factor STAT3 and NF-?B signaling pathway which may be related to
the tumorigenicity in glioma.