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2017 ; 8
(24
): 39209-39217
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Upregulation of minichromosome maintenance complex component 3 during
epithelial-to-mesenchymal transition in human prostate cancer
#MMPMID28424404
Stewart PA
; Khamis ZI
; Zhau HE
; Duan P
; Li Q
; Chung LWK
; Sang QA
Oncotarget
2017[Jun]; 8
(24
): 39209-39217
PMID28424404
show ga
Metastasis is often associated with epithelial-to-mesenchymal transition (EMT).
To understand the molecular mechanisms of this process, we conducted proteomic
analysis of androgen-repressed cancer of the prostate (ARCaP), an experimental
model of metastatic human prostate cancer. The protein signatures of epithelial
(ARCaPE) and mesenchymal (ARCaPM) cells were consistent with their phenotypes.
Importantly, the expression of mini-chromosome maintenance 3 (MCM3) protein, a
crucial subunit of DNA helicase, was significantly higher in ARCaPM cells than
that of ARCaPE cells. This increased MCM3 protein expression level was verified
using Western blot analysis of the ARCaP cell lineages. Furthermore,
immunohistochemical analysis of MCM3 protein levels in human prostate tissue
specimens showed elevated expression in bone metastasis and advanced human
prostate cancer tissue samples. Subcutaneous injection experiments using ARCaPE
and ARCaPM cells in a mouse model also revealed increased MCM3 protein levels in
mesenchymal-derived tumors. This study identifies MCM3 as an upregulated molecule
in mesenchymal phenotype of human prostate cancer cells and advanced human
prostate cancer specimens, suggesting MCM3 may be a new potential drug target for
prostate cancer treatment.