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2016 ; 6
(ä): 21860
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Cucurbitacin B inhibits the stemness and metastatic abilities of NSCLC via
downregulation of canonical Wnt/?-catenin signaling axis
#MMPMID26905250
Shukla S
; Sinha S
; Khan S
; Kumar S
; Singh K
; Mitra K
; Maurya R
; Meeran SM
Sci Rep
2016[Feb]; 6
(ä): 21860
PMID26905250
show ga
Lack of effective anti-metastatic drugs creates a major hurdle for metastatic
lung cancer therapy. For successful lung cancer treatment, there is a strong need
of newer therapeutics with metastasis-inhibitory potential. In the present study,
we determined the anti-metastatic and anti-angiogenic potential of a natural
plant triterpenoid, Cucurbitacin B (CuB) against non-small cell lung cancer
(NSCLC) both in vitro and in vivo. CuB demonstrated a strong anti-migratory and
anti-invasive ability against metastatic NSCLC at nanomolar concentrations. CuB
also showed significant tumor angiogenesis-inhibitory effects as evidenced by the
inhibition of migratory, invasive and tube-forming capacities of human umbilical
vein endothelial cells. CuB-mediated inhibition of angiogenesis was validated by
the inhibition of pre-existing vasculature in chick embryo chorio-allantoic
membrane and matrigel plugs. Similarly, CuB inhibited the migratory behavior of
TGF-?1-induced experimental EMT model. The CuB-mediated inhibition of metastasis
and angiogenesis was attributable to the downregulation of Wnt/?-catenin
signaling axis, validated by siRNA-knockdown of Wnt3 and Wnt3a. The CuB-mediated
downregulation of Wnt/?-catenin signaling was also validated using
4-(methylnitrosamino)-1-(3-pyridyl)-1-butanone (NNK)-induced lung tumorigenesis
model in vivo. Collectively, our findings suggest that CuB inhibited the
metastatic abilities of NSCLC through the inhibition of Wnt/?-catenin signaling
axis.