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2015 ; 6
(18
): 16031-42
Nephropedia Template TP
gab.com Text
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English Wikipedia
Tanshinone I inhibits tumor angiogenesis by reducing Stat3 phosphorylation at
Tyr705 and hypoxia-induced HIF-1? accumulation in both endothelial and tumor
cells
#MMPMID26202747
Wang Y
; Li JX
; Wang YQ
; Miao ZH
Oncotarget
2015[Jun]; 6
(18
): 16031-42
PMID26202747
show ga
Tanshinone I (Tanshinone-1), a major active principle of Salvia miltiorrhiza
(Danshen), has been shown to overcome tumor drug resistance and metastasis. Here
we report that tanshinone-1 inhibits angiogenesis. Tanshinone-1 inhibited
proliferation, migration and tube formation of vascular endothelial cells, rat
aortic ring sprouting and the neovascularization of the chick chorioallantoic
membrane in a concentration-dependent manner. In endothelial cells, tanshinone-1
almost completely inhibited phosphorylation of Stat3 at Tyr705 regardless of
hypoxia or normoxia but only slightly decreased the hypoxia-induced HIF-1?
accumulation. In tumor cells, contrastively, tanshinone-1 could not only make
phosphorylation of Stat3 at Tyr705 disappear but also reduce the hypoxia-induced
accumulation of HIF-1? to its baseline levels at normoxia. Consequently, VEGF
secretion from tumor cells was reduced, which could potentiate the direct
inhibition of tanshinone-1 on endothelial cells. Together with its overcoming
tumor drug resistance and metastasis, our results reveal unique characteristics
of tanshinone-1 and its improved derivatives as promising angiogenesis
inhibitors.