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2016 ; 13
(5
): 4229-37
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MicroRNA-29b inhibits TGF-?1-induced fibrosis via regulation of the TGF-?1/Smad
pathway in primary human endometrial stromal cells
#MMPMID27035110
Li J
; Cen B
; Chen S
; He Y
Mol Med Rep
2016[May]; 13
(5
): 4229-37
PMID27035110
show ga
Transforming growth factor (TGF)??1 has a key role in the regulation of fibrosis
and organ dysfunction. During the pathogenesis and progression of vital organ
fibrosis, the microRNA (miR)?29 family is irregularly downregulated and exogenous
supplementation of miR?29b has a strong anti?fibrotic capacity. However, whether
TGF??1 is able to provoke endometrial fibrosis, and the role of miR?29 in
endometrial fibrosis remain unclear. In the present study, RT?qPCR,
immunocytochemistry, western blot analysis, scanning electron microscopy,
immunofluorescence staining, cell proliferation assay and flow cytometric
analysis were employed. The results demonstrated that the expression levels of
collagen, type 1, alpha 1 (COL1A1), ??smooth muscle actin (??SMA) and
phosphorylated (p)?Smad2/3 were increased, whereas miR?29b and maternally
expressed gene 3 (MEG3) were decreased in primary endometrial stromal cells
(ESCs) in response to TGF??1 stimulation, in a time and dose?dependent manner.
Furthermore, overexpression of miR?29b markedly reduced the expression levels of
COL1A1 and ??SMA, and decreased the expression and nuclear accumulation of
p?Smad2/3. In addition, ectopic overexpression of miR?29b increased the
expression levels of MEG3, inhibited myofibroblast?like cell proliferation and
induced apoptosis. These findings indicated that miR?29b may have a significant
anti?fibrotic role, and may attenuate TGF??1?induced fibrosis in ESCs. Therefore,
exogenous miR?29b may serve as a potential therapeutic agent for the treatment of
endometrial fibrosis.