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2018 ; 8
(1
): 3624
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Activation of AMPK inhibits TGF-?1-induced airway smooth muscle cells
proliferation and its potential mechanisms
#MMPMID29483552
Pan Y
; Liu L
; Li S
; Wang K
; Ke R
; Shi W
; Wang J
; Yan X
; Zhang Q
; Wang Q
; Chai L
; Xie X
; Li M
Sci Rep
2018[Feb]; 8
(1
): 3624
PMID29483552
show ga
The aims of the present study were to examine signaling mechanisms underlying
transforming growth factor ?1 (TGF-?1)-induced airway smooth muscle cells (ASMCs)
proliferation and to determine the effect of adenosine monophosphate-activated
protein kinase (AMPK) activation on TGF-?1-induced ASMCs proliferation and its
potential mechanisms. TGF-?1 reduced microRNA-206 (miR-206) level by activating
Smad2/3, and this in turn up-regulated histone deacetylase 4 (HDAC4) and
consequently increased cyclin D1 protein leading to ASMCs proliferation. Prior
incubation of ASMCs with metformin induced AMPK activation and blocked
TGF-?1-induced cell proliferation. Activation of AMPK slightly attenuated
TGF-?1-induced miR-206 suppression, but dramatically suppressed TGF-?1-caused
HDAC4 up-expression and significantly increased HDAC4 phosphorylation finally
leading to reduction of up-regulated cyclin D1 protein expression. Our study
suggests that activation of AMPK modulates miR-206/HDAC4/cyclin D1 signaling
pathway, particularly targeting on HDAC4, to suppress ASMCs proliferation and
therefore has a potential value in the prevention and treatment of asthma by
alleviating airway remodeling.
|AMP-Activated Protein Kinases/genetics/*metabolism
[MESH]