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2015 ; 22
(7
): 1158-69
Nephropedia Template TP
gab.com Text
Twit Text FOAVip
Twit Text #
English Wikipedia
Suppression of epithelial-mesenchymal transition and apoptotic pathways by
miR-294/302 family synergistically blocks let-7-induced silencing of self-renewal
in embryonic stem cells
#MMPMID25501598
Guo WT
; Wang XW
; Yan YL
; Li YP
; Yin X
; Zhang Q
; Melton C
; Shenoy A
; Reyes NA
; Oakes SA
; Blelloch R
; Wang Y
Cell Death Differ
2015[Jul]; 22
(7
): 1158-69
PMID25501598
show ga
The embryonic stem cell (ESC)-enriched miR-294/302 family and the somatic
cell-enriched let-7 family stabilizes the self-renewing and differentiated cell
fates, respectively. The mechanisms underlying these processes remain unknown.
Here we show that among many pathways regulated by miR-294/302, the combinatorial
suppression of epithelial-mesenchymal transition (EMT) and apoptotic pathways is
sufficient in maintaining the self-renewal of ESCs. The silencing of ESC
self-renewal by let-7 was accompanied by the upregulation of several EMT
regulators and the induction of apoptosis. The ectopic activation of either EMT
or apoptotic program is sufficient in silencing ESC self-renewal. However, only
combined but not separate suppression of the two programs inhibited the silencing
of ESC self-renewal by let-7 and several other differentiation-inducing miRNAs.
These findings demonstrate that combined repression of the EMT and apoptotic
pathways by miR-294/302 imposes a synergistic barrier to the silencing of ESC
self-renewal, supporting a model whereby miRNAs regulate complicated cellular
processes through synergistic repression of multiple targets or pathways.