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.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 Sci+Rep
2017 ; 7
(1
): 12016
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Long non-coding RNA HOTAIR promotes cell migration by upregulating insulin growth
factor-binding protein 2 in renal cell carcinoma
#MMPMID28931862
Katayama H
; Tamai K
; Shibuya R
; Nakamura M
; Mochizuki M
; Yamaguchi K
; Kawamura S
; Tochigi T
; Sato I
; Okanishi T
; Sakurai K
; Fujibuchi W
; Arai Y
; Satoh K
Sci Rep
2017[Sep]; 7
(1
): 12016
PMID28931862
show ga
Renal cell carcinoma (RCC) is one of the most lethal urologic cancers. About
one-third of RCC patients already have distal metastasis at the time of
diagnosis. There is growing evidence that Hox antisense intergenic RNA (HOTAIR)
plays essential roles in metastasis in several types of cancers. However, the
precise mechanism by which HOTAIR enhances malignancy remains unclear, especially
in RCC. Here, we demonstrated that HOTAIR enhances RCC-cell migration by
regulating the insulin growth factor-binding protein 2 (IGFBP2) expression.
HOTAIR expression in tumors was significantly correlated with nuclear grade,
lymph-node metastasis, and lung metastasis. High HOTAIR expression was associated
with a poor prognosis in both our dataset and The Cancer Genome Atlas dataset.
Migratory capacity was enhanced in RCC cell lines in a HOTAIR-dependent manner.
HOTAIR overexpression accelerated tumorigenicity and lung metastasis in
immunodeficient mice. Microarray analysis revealed that IGFBP2 expression was
upregulated in HOTAIR-overexpressing cells compared with control cells. The
enhanced migration activity of HOTAIR-overexpressing cells was attenuated by
IGFBP2 knockdown. IGFBP2 and HOTAIR were co-expressed in clinical RCC samples.
Our findings suggest that the HOTAIR-IGFBP2 axis plays critical roles in RCC
metastasis and may serve as a novel therapeutic target for advanced RCC.