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2016 ; 13
(1
): 75-82
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MicroRNA-21 stimulates epithelial-to-mesenchymal transition and tumorigenesis in
clear cell renal cells
#MMPMID26572589
Cao J
; Liu J
; Xu R
; Zhu X
; Liu L
; Zhao X
Mol Med Rep
2016[Jan]; 13
(1
): 75-82
PMID26572589
show ga
Clear cell renal cell carcinoma (ccRCC) metastasis may result from
epithelial-to-mesenchymal transition and mesenchymal stem cells that contribute
to the development of the primary tumor. In this study, it was demonstrated that
microRNA-21 (miR-21) acts as an oncogenic driver of ccRCC. ccRCC spheres were
isolated and it was shown that they exhibited cancer stem cell?like properties,
including the formation of self?renewing spheres. Spheres showed increased
expression of stem cell?related transcription factors and epithelial?mesenchymal
transition (EMT) markers. In addition, secondary sphere formation capacity was
assessed after miR?21 transfection. miR?21 accelerated the formation of ccRCC
spheres, which shared molecular characteristics with the spontaneous ccRCC
spheres. It was demonstrated that miR?21 overexpression facilitates ccRCC sphere
formation. Thus, a single miRNA may have an impact on the formation of highly
tumorigenic cancer spheres in kidney cancer.