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.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 Mol+Cell+Proteomics
2016 ; 15
(7
): 2263-78
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Multidimensional Proteomics Reveals a Role of UHRF2 in the Regulation of
Epithelial-Mesenchymal Transition (EMT)
#MMPMID27114453
Lai M
; Liang L
; Chen J
; Qiu N
; Ge S
; Ji S
; Shi T
; Zhen B
; Liu M
; Ding C
; Wang Y
; Qin J
Mol Cell Proteomics
2016[Jul]; 15
(7
): 2263-78
PMID27114453
show ga
UHRF1 is best known for its positive role in the maintenance of DNMT1-mediated
DNA methylation and is implicated in a variety of tumor processes. In this paper,
we provided evidence to demonstrate a role of UHRF2 in cell motility and invasion
through the regulation of the epithelial-mesenchymal transition (EMT) process by
acting as a transcriptional co-regulator of the EMT-transcription factors (TFs).
We ectopically expressed UHRF2 in gastric cancer cell lines and performed
multidimensional proteomics analyses. Proteome profiling analysis suggested a
role of UHRF2 in repression of cell-cell adhesion; analysis of proteome-wide TF
DNA binding activities revealed the up-regulation of many EMT-TFs in
UHRF2-overexpressing cells. These data suggest that UHRF2 is a regulator of cell
motility and the EMT program. Indeed, cell invasion experiments demonstrated that
silencing of UHRF2 in aggressive cells impaired their abilities of migration and
invasion in vitro Further ChIP-seq identified UHRF2 genomic binding motifs that
coincide with several TF binding motifs including EMT-TFs, and the binding of
UHRF2 to CDH1 promoter was validated by ChIP-qPCR. Moreover, the interactome
analysis with IP-MS uncovered the interaction of UHRF2 with TFs including TCF7L2
and several protein complexes that regulate chromatin remodeling and histone
modifications, suggesting that UHRF2 is a transcription co-regulator for TFs such
as TCF7L2 to regulate the EMT process. Taken together, our study identified a
role of UHRF2 in EMT and tumor metastasis and demonstrated an effective approach
to obtain clues of UHRF2 function without prior knowledge through combining
evidence from multidimensional proteomics analyses.