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2016 ; 6
(ä): 22066
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Pygo2 functions as a prognostic factor for glioma due to its up-regulation of
H3K4me3 and promotion of MLL1/MLL2 complex recruitment
#MMPMID26902498
Zhou C
; Zhang Y
; Dai J
; Zhou M
; Liu M
; Wang Y
; Chen XZ
; Tang J
Sci Rep
2016[Feb]; 6
(ä): 22066
PMID26902498
show ga
Pygo2 has been discovered as an important Wnt signaling component contributing to
the activation of Wnt-target gene transcription. In the present study, we
discovered that Pygo2 mRNA and protein levels were up-regulated in the majority
of (152/209) human brain glioma tissues and five glioma cell lines, and
significantly correlated with the age, the WHO tumor classification and poor
patient survival. The histone methyltransferase complex components (WDR5, Ash2,
and menin, but not CXCC1 or NCOA6) were down-regulated at the promoter loci of
Wnt target genes after Pygo2 knockdown, and this was accompanied by the
down-regulation of Wnt/?-catenin pathway activity. Further, we demonstrated that
the involvement of Pygo2 in the activation of the Wnt pathway in human glioma
progression is through up-regulation of the H3K4me3 (but not H3K4me2) by
promoting the recruitment of the histone methyltransferase MLL1/MLL2 complex to
Wnt target gene promoters. Thus, our study provided evidence that Pygo2 functions
as a novel prognostic marker and represents a potential therapeutic target.