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2016 ; 6
(ä): 28281
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MiR-21-5p Links Epithelial-Mesenchymal Transition Phenotype with Stem-Like Cell
Signatures via AKT Signaling in Keloid Keratinocytes
#MMPMID27596120
Yan L
; Cao R
; Liu Y
; Wang L
; Pan B
; Lv X
; Jiao H
; Zhuang Q
; Sun X
; Xiao R
Sci Rep
2016[Sep]; 6
(ä): 28281
PMID27596120
show ga
Keloid is the abnormal wound healing puzzled by the aggressive growth and high
recurrence rate due to its unrevealed key pathogenic mechanism. MicroRNAs
contribute to a series of biological processes including epithelial-mesenchymal
transition (EMT) and cells stemness involved in fibrotic disease. Here, using
microRNAs microarray analysis we found mir-21-5p was significantly up-regulated
in keloid epidermis. To investigate the role of miR-21-5p in keloid pathogenesis,
we transfected miR-21-5p mimic or inhibitor in keloid keratinocytes and examined
the abilities of cell proliferation, apoptosis, migration and invasion, the
expressions of EMT-related markers vimentin and E-cadherin and stem-like
cells-associated markers CD44 and ALDH1, and the involvement of PTEN and the
signaling of AKT and ERK. Our results demonstrated that up-regulation or
knockdown of miR-21-5p significantly increased or decreased the migration,
invasion and sphere-forming abilities of keloid keratinocytes, and the phenotype
of EMT and cells stemness were enhanced or reduced as well. Furthermore, PTEN and
p-AKT were shown to participate in the regulation of miR-21-5p on EMT phenotypes
and stemness signatures of keloid keratinocytes, which might account for the
invasion and recurrence of keloids. This molecular mechanism of miR-21-5p on
keloid keratinocytes linked EMT with cells stemness and implicated novel
therapeutic targets for keloids.