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2015 ; 10
(3
): 1487-1494
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Forkhead box J1 expression is upregulated and correlated with prognosis in
patients with clear cell renal cell carcinoma
#MMPMID26622696
Zhu P
; Piao Y
; Dong X
; Jin Z
Oncol Lett
2015[Sep]; 10
(3
): 1487-1494
PMID26622696
show ga
The forkhead box (FOX) family of transcription factors are considered to have a
role in tumorigenesis. FOXJ1 is a member of the FOX family; however, its function
in human renal cell carcinoma (RCC) has remained to be elucidated. Therefore, the
present study evaluated the expression of FOXJ1 in human clear cell RCC and the
effect of FOXJ1 on the proliferative ability of RCC cells. The RCC specimens
analyzed in the present study were obtained from 286 patients with RCC who
underwent nephrectomy. FOXJ1 mRNA expression levels were determined using reverse
transcription-quantitative polymerase chain reaction, and FOXJ1 protein
expression levels were determined using immunohistochemistry and western blot
analysis. To determine the effect of FOXJ1 on the proliferative ability of RCC
cells, the expression of FOXJ1 was decreased using small interfering (si)RNA, and
a FOXJ1 vector was stably transfected into RCC cell lines. The proliferative
ability of RCC cells was then examined using a WST-1 assay and xenograft
experiments with BALB/c nude mice, where the association between FOXJ1 expression
and patient survival was determined using Kaplan-Meier analysis. FOXJ1 expression
was significantly higher in RCC tissues compared with that of healthy renal
tissues. Furthermore, FOXJ1 expression was associated with tumor stage,
histologic grade and size. In addition, FOXJ1 significantly enhanced the
proliferation of RCC cells in vitro and in vivo. The present study identified
that FOXJ1 expression was upregulated in RCC and enhanced the proliferative
ability of RCC cells. Therefore, FOXJ1 may serve as an independent prognostic
marker and a therapeutic target for the treatment of patients with RCC.