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2015 ; 6
(21
): 18389-405
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MiR-101 targets DUSP1 to regulate the TGF-? secretion in sorafenib inhibits
macrophage-induced growth of hepatocarcinoma
#MMPMID26158762
Wei X
; Tang C
; Lu X
; Liu R
; Zhou M
; He D
; Zheng D
; Sun C
; Wu Z
Oncotarget
2015[Jul]; 6
(21
): 18389-405
PMID26158762
show ga
Hepatocellular carcinoma (HCC)-associated macrophages accelerate tumor
progression via growth factor release. Therefore, tumor-associated macrophages
(TAMs)-initiated signaling cascades are potential therapeutic targets. To better
understand anticancer effects of systemic HCC therapy, we studied sorafenib's
effect on macrophage function, focusing on macrophage-related growth factor
secretion. We found that dual specificity phosphatase 1 (DUSP1) is a direct
target of miR-101. Transfection of miR-101 reduced DUSP1 induction in M2
macrophages and prolonged ERK1/2, p38 and JNK activation, whereas inhibition of
miR-101 enhanced DUSP1 expression and decreased ERK1/2, p38 and JNK activation.
miR-101 expression was decreased by sorafenib, and inhibition of PI3K/AKT blocked
induction of miR-101 by LPS in M2 cells. M2 cells with greater TGF-? and CD206
mRNA expression compared to M1 cells had increased hepatoma growth, metastases
and EMT. Sorafenib inhibited miR-101 expression and enhanced DUSP1 expression and
lowered TGF-? and CD206 release in M2 cells, slowing macrophage-driven HCC. Our
studies demonstrate miR-101 regulates macrophage innate immune responses to LPS
via targeting DUSP1. Sorafenib alters macrophage polarization, reduces TGF-?
driven cancer growth, metastases and EMT in vitro, and partially inhibits
macrophage activation in vivo. Thus, macrophage modulation might explain the
anticancer effects of sorafenib.