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2016 ; 6
(ä): 36663
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Inhibiting MDSC differentiation from bone marrow with phytochemical
polyacetylenes drastically impairs tumor metastasis
#MMPMID27857157
Wei WC
; Lin SY
; Lan CW
; Huang YC
; Lin CY
; Hsiao PW
; Chen YR
; Yang WC
; Yang NS
Sci Rep
2016[Nov]; 6
(ä): 36663
PMID27857157
show ga
Myeloid-derived suppressor cells (MDSCs) are implicated in the promotion of tumor
metastasis by protecting metastatic cancerous cells from immune surveillance and
have thus been suggested as novel targets for cancer therapy. We demonstrate here
that oral feeding with polyacetylenic glycosides (BP-E-F1) from the medicinal
plant Bidens pilosa effectively suppresses tumor metastasis and inhibits
tumor-induced accumulation of granulocytic (g) MDSCs, but does not result in body
weight loss in a mouse mammary tumor-resection model. BP-E-F1 is further
demonstrated to exert its anti-metastasis activity through inhibiting the
differentiation and function of gMDSCs. Pharmacokinetic and mechanistic studies
reveal that BP-E-F1 suppresses the differentiation of gMDSCs via the inhibition
of a tumor-derived, G-CSF-induced signaling pathway in bone marrow cells of test
mice. Taken together, our findings suggest that specific plant polyacetylenic
glycosides that target gMDSC differentiation by communicating with bone marrow
cells may hence be seriously considered for potential application as botanical
drugs against metastatic cancers.