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2017 ; 8
(8
): e2981
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Upregulation of DACT2 suppresses proliferation and enhances apoptosis of glioma
cell via inactivation of YAP signaling pathway
#MMPMID28796248
Tan Y
; Li QM
; Huang N
; Cheng S
; Zhao GJ
; Chen H
; Chen S
; Tang ZH
; Zhang WQ
; Huang Q
; Cheng Y
Cell Death Dis
2017[Aug]; 8
(8
): e2981
PMID28796248
show ga
DACT2, one of the Dact gene family members, was shown to function as a tumor
suppressor. However, its function in gliomas remains largely unknown. In this
study, we investigated the role of DACT2, underlying molecular mechanisms and its
clinical significance in glioma patients. Downexpression of DACT2 in gliomas
compared with adjacent normal brain tissues was correlated with glioma grade and
poor survival. Cox regression analysis revealed that the DACT2 is an independent
prognostic indicator for glioma patients. Overexpression of DACT2 in glioma cells
inhibited proliferation, cell cycle and enhanced apoptosis, sensitivity to
temozolomide in vitro and suppressed tumor growth in vivo. Whereas knockdown of
DACT2 induce opposite reaction. Mechanistically, overexpression of DACT2 resulted
in upregulation of important signaling molecules such as p-YAP and p-?-catenin,
and prevent YAP translocating into nucleus and sequestering in the cytoplasm to
degrade. The study further proved that DACT2 can suppress YAP through
Wnt/?-catenin signaling pathway. Collectively, these data indicate that DACT2 has
a tumor suppressor function via inactivation of YAP pathway, providing a
promising target for the treatment of gliomas.
|Adaptor Proteins, Signal Transducing/genetics/*metabolism
[MESH]