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2015 ; 36
(3
): 645-52
Nephropedia Template TP
gab.com Text
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Twit Text #
English Wikipedia
Bufalin inhibits TGF-?-induced epithelial-to-mesenchymal transition and migration
in human lung cancer A549 cells by downregulating TGF-? receptors
#MMPMID26133118
Zhao L
; Liu S
; Che X
; Hou K
; Ma Y
; Li C
; Wen T
; Fan Y
; Hu X
; Liu Y
; Qu X
Int J Mol Med
2015[Sep]; 36
(3
): 645-52
PMID26133118
show ga
The epithelial-to-mesenchymal transition (EMT) is a well-known prerequisite for
cancer cells to acquire the migratory and invasive capacity, and to subsequently
metastasize. Bufalin is one of the major active components of the traditional
Chinese medicine Chan Su, and accumulating evidence has shown its anticancer
effect in multipe types of cancer. However, the role of bufalin in transforming
growth factor?? (TGF??)?induced EMT and migration remains unclear. In the present
study, the effect of bufalin on TGF???induced EMT and migration was investigated
in human lung cancer A549 cells. TGF?? induced EMT in A549 cells and increased
their migratory ability, which were markedly suppressed by bufalin. Additionally,
TGF???induced upregulation of Twist2 and zinc finger E?box binding homeobox 2
(ZEB2), as well as the phosphorylation of Smad2 and Smad3 were also inhibited by
bufalin. However, the Smad?independent signaling pathways were not affected.
Further analysis showed that the TGF?? receptor I (T?RI) and TGF?? receptor II
(T?RII) were downregulated in the presence of bufalin. Pretreatment with
SB431542, a potent inhibitor of the phosphorylation of T?RI, significantly
attenuated TGF???induced EMT, mimicking the effect of bufalin on A549 cells.
Taken together, these results suggest that bufalin suppresses TGF-?-induced EMT
and migration by downregulating T?RI and T?RII in A549 cells.