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2015 ; 6
(22
): 19290-304
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Infiltrating neutrophils promote renal cell carcinoma progression via VEGFa/HIF2?
and estrogen receptor ? signals
#MMPMID26079540
Song W
; Yeh CR
; He D
; Wang Y
; Xie H
; Pang ST
; Chang LS
; Li L
; Yeh S
Oncotarget
2015[Aug]; 6
(22
): 19290-304
PMID26079540
show ga
Neutrophils make up a significant portion of the infiltrated immune cells found
in the tumor microenvironment. Here we found more infiltrated neutrophils in
human renal cell carcinoma (RCC) lesions than adjacent benign areas. In vitro RCC
studies showed that neutrophils (HL-60N cells) infiltrated toward RCC cells and
subsequently enhanced RCC cell migration and invasion. Co-culture of RCC cells
with HL-60N cells up-regulated ER?, VEGFa and HIF2? mRNA levels. ER? signals
increased RCC cell migration via induction of the VEGFa/HIF2? pathway. Treatment
of HIF inhibitor or rapamycin, or knockdown of ER? in RCC cells reversed
HL-60N-promoted RCC migration. In vivo data using orthotopically xenografted RCC
mouse model confirmed that infiltrated neutrophils promoted RCC migration via
modulating the expressions of ER?, VEGFa and HIF2? signal pathways. Together, our
studies revealed that neutrophils are favorably recruited to the RCC cells to
promote the RCC migration and invasion. Targeting the infiltrating RCC tumor
microenvironment with anti-estrogen or rapamycin may be a potential therapy to
suppress RCC progression.