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2016 ; 6
(ä): 36075
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Involvement of eIF6 in external mechanical stretch-mediated murine dermal
fibroblast function via TGF-?1 pathway
#MMPMID27824055
Shu Q
; Tan J
; Ulrike VD
; Zhang X
; Yang J
; Yang S
; Hu X
; He W
; Luo G
; Wu J
Sci Rep
2016[Nov]; 6
(ä): 36075
PMID27824055
show ga
External mechanical loading on a wound commonly increases fibrosis. Transforming
growth factor-?1 (TGF-?1) has been implicated in fibrosis in various models,
including the mechanical force model. However, the underlying mechanism is
unclear. Our previous experiments suggested that eukaryotic initiation factor 6
(eIF6) acted as a regulator of TGF-?1 expression, and negatively impact on
collagen synthesis. Our current results showed that external mechanical
stretching significantly increased COL1A1, TGF-?1 and eIF6 expression as well as
dermal fibroblasts proliferation, both in vitro and in vivo. eIF6 -deficient
(eIF6(+/-)) cells exhibited significantly higher levels of COL1A1, and these
levels increased further with external mechanical stretching, suggesting that
mechanical stretching plays a synergistic role in promoting COL1A1 expression in
eIF6(+/-) cells. Inhibition of TGF?R I/II by LY2109761 decreased COL1A1 protein
expression in eIF6(+/-) dermal fibroblasts in a cell stretching model, and
attenuated granulation tissue formation in partial thickness wounds of eIF6(+/-)
mice. These data suggest that mechanical stretching has a synergistic role in the
expression of COL1A1 in eIF6(+/-) cells, and is mediated by activation of
TGF?RI/II. Taken together, our results indicate that eIF6 may be involved in
external mechanical force-mediated murine dermal fibroblast function at least
partly through the TGF-?1 pathway.