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2016 ; 6
(ä): 32523
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Genotypes of cancer stem cells characterized by epithelial-to-mesenchymal
transition and proliferation related functions
#MMPMID27597445
Hsu CL
; Chung FH
; Chen CH
; Hsu TT
; Liu SM
; Chung DS
; Hsu YF
; Chen CL
; Ma N
; Lee HC
Sci Rep
2016[Sep]; 6
(ä): 32523
PMID27597445
show ga
Cancer stem cells (CSCs), or cancer cells with stem cell-like properties,
generally exhibit drug resistance and have highly potent cancer inducing
capabilities. Genome-wide expression data collected at public repositories over
the last few years provide excellent material for studies that can lead to
insights concerning the molecular and functional characteristics of CSCs. Here,
we conducted functional genomic studies of CSC based on fourteen PCA-screened
high quality public CSC whole genome gene expression datasets and, as control,
four high quality non-stem-like cancer cell and non-cancerous stem cell datasets
from the Gene Expression Omnibus database. A total of 6,002 molecular signatures
were taken from the Molecular Signatures Database and used to characterize the
datasets, which, under two-way hierarchical clustering, formed three genotypes.
Type 1, consisting of mainly glia CSCs, had significantly enhanced proliferation,
and significantly suppressed epithelial-mesenchymal transition (EMT), related
functions. Type 2, mainly breast CSCs, had significantly enhanced EMT, but not
proliferation, related functions. Type 3, composed of ovarian, prostate, and
colon CSCs, had significantly suppressed proliferation related functions and
mixed expressions on EMT related functions.