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2015 ; 5
(ä): 16053
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Interleukin-17 promotes angiogenesis by stimulating VEGF production of cancer
cells via the STAT3/GIV signaling pathway in non-small-cell lung cancer
#MMPMID26524953
Pan B
; Shen J
; Cao J
; Zhou Y
; Shang L
; Jin S
; Cao S
; Che D
; Liu F
; Yu Y
Sci Rep
2015[Nov]; 5
(ä): 16053
PMID26524953
show ga
The presence of IL-17-positive cells is observed in a variety of inflammatory
associated cancers and IL-17 has been found to be involved in angiogenesis.
However, it remains unclear how IL-17 might contribute to tumor angiogenesis. In
our study, IL-17 enhanced the formation of vessel-like tubes in HUVECs both
directly (when HUVECs were incubated with IL-17) and indirectly (when HUVECs were
incubated in conditioned cell media (CCM) from IL-17-treated cancer cells). Our
results from experiments using siRNA-mediated knockdowns of STAT3 and GIV suggest
that the effects of IL-17 were mediated by activating STAT3/GIV signaling in
NSCLC cells and subsequently up-regulating its downstream target VEGF. Consistent
with these findings, immunostaining experiments on human NSCLC tissues indicated
that IL-17 and GIV expression were significantly and positively associated with
increased tumor vascularity. The clinical significance of IL-17 was authenticated
by our finding that the combination of intratumoral IL-17?+?cells and GIV
expression served as a better prognosticator for survival than either marker
alone. Therefore, our finding highlights a novel aspect of STAT3/GIV pathway in
the IL-17 promotes tumor angiogenesis of NSCLC.