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2016 ; 22
(9-10
): 707-20
Nephropedia Template TP
gab.com Text
Twit Text FOAVip
Twit Text #
English Wikipedia
Small Molecule Inhibition of Transforming Growth Factor Beta Signaling Enables
the Endogenous Regenerative Potential of the Mammalian Calvarium
#MMPMID27036931
Senarath-Yapa K
; Li S
; Walmsley GG
; Zielins E
; Paik K
; Britto JA
; Grigoriadis AE
; Wan DC
; Liu KJ
; Longaker MT
; Quarto N
Tissue Eng Part A
2016[May]; 22
(9-10
): 707-20
PMID27036931
show ga
Current approaches for the treatment of skeletal defects are suboptimal,
principally because the ability of bone to repair and regenerate is poor.
Although the promise of effective cellular therapies for skeletal repair is
encouraging, these approaches are limited by the risks of infection, cellular
contamination, and tumorigenicity. Development of a pharmacological approach
would therefore help avoid some of these potential risks. This study identifies
transforming growth factor beta (TGF?) signaling as a potential pathway for
pharmacological modulation in vivo. We demonstrate that inhibition of TGF?
signaling by the small molecule SB431542 potentiates calvarial skeletal repair
through activation of bone morphogenetic protein (BMP) signaling on osteoblasts
and dura mater cells participating in healing of calvarial defects. Cells respond
to inhibition of TGF? signaling by producing higher levels of BMP2 that
upregulates inhibitory Smad6 expression, thus providing a negative feedback loop
to contain excessive BMP signaling. Importantly, study on human osteoblasts
indicates that molecular mechanism(s) triggered by SB431542 are conserved.
Collectively, these data provide insights into the use of small molecules to
modulate key signaling pathways for repairing skeletal defects.