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2015 ; 8
(5
): 5224-9
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miRNA-221 promotes proliferation, migration and invasion by targeting TIMP2 in
renal cell carcinoma
#MMPMID26191221
Lu GJ
; Dong YQ
; Zhang QM
; Di WY
; Jiao LY
; Gao QZ
; Zhang CG
Int J Clin Exp Pathol
2015[]; 8
(5
): 5224-9
PMID26191221
show ga
INTRODUCTION: MicroRNAs (miRNAs) play important roles in tumorigenesis. In this
study, we investigated the role of miR-221 in the development and progression of
clear cell renal cell carcinoma (ccRCC). METHODS: Quantitative real-time PCR
(qRT-PCR) was used to measure the expression level of miR-221 in ccRCC tissues
and cell lines. Then, we investigated the role of miR-221 to determine its
potential roles on renal cancer cell proliferation, migration and invasion in
vitro. A luciferase reporter assay was conducted to confirm the target gene of
miR-221 and the results were validated in renal cancer cells. RESULTS: In the
present study, we found that miR-221 was significantly increased in ccRCC tissues
and cell lines. Knocked-down expression of miR-221 remarkably inhibited cell
proliferation, migration and invasion of renal cancer cells. Moreover, at the
molecular level, our results suggested that TIMP2 as a direct target of miR-221
through which miR-221 promoted tumor cell proliferation, migration and invasion.
CONCLUSIONS: These findings suggested that miR-221 play an oncogenic role in the
renal cancer cell proliferation, migration and invasion by directly inhibiting
the tumor suppressor TIMP2, indicating miR-221 act as a potential new therapeutic
target for the treatment of ccRCC.