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2016 ; 7
(40
): 65553-65567
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Role of RbBP5 and H3K4me3 in the vicinity of Snail transcription start site
during epithelial-mesenchymal transition in prostate cancer cell
#MMPMID27566588
Li D
; Sun H
; Sun WJ
; Bao HB
; Si SH
; Fan JL
; Lin P
; Cui RJ
; Pan YJ
; Wen SM
; Zheng XL
; Yu XG
Oncotarget
2016[Oct]; 7
(40
): 65553-65567
PMID27566588
show ga
EMT (epithelial-mesenchymal transition) occurs in a wide range of tumor types,
and has been shown to be crucial for metastasis. Epigenetic modifications of
histones contribute to chromatin structure and result in the alterations in gene
expression. Tri-methylation of histone H3 lysine 4 (H3K4me3) is associated with
the promoters of actively transcribed genes and can serve as a transcriptional
on/off switch. RbBP5 is a component of the COMPASS/ -like complex, which
catalyzes H3K4me3 formation. In this study, we found that in the process of
TGF-Beta1 induced EMT in the prostate cancer cell line DU145, H3K4me3 enrichment
and RbBP5 binding increased in the vicinity of Snail (SNAI1) transcription start
site. Knocking-down of RbBP5 notably decreased Snail expression and EMT.
Recruitment of RbBP5 and formation of H3K4me3 at Snail TSS during EMT depend on
binding of SMAD2/3 and CBP at Snail TSS. This study links the SMAD2/3 signal with
Snail transcription via a histone modification - H3K4me3. Furthermore, our
research also demonstrates that RbBP5 and even WRAD may be a promising
therapeutic candidates in treating prostate cancer metastasis, and that DU145
cells maintain their incomplete mesenchymal state in an auto/ paracrine manner.