Long noncoding RNA LINC-PINT promotes proliferation through EZH2 and predicts poor prognosis in clear cell renal cell carcinoma
Renal cell carcinoma (RCC) is one of the most common types of urological malignant tumors. Despite recent advances in diagnosis and management of RCC, its prognosis remains poor. Emerging evidence has shown that long noncoding RNAs (lncRNAs) play crucial regulatory roles in cancer biology. The most...
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Published in | OncoTargets and therapy Vol. 12; pp. 4729 - 4740 |
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Main Authors | , , , , , , , , , , , , , |
Format | Journal Article |
Language | English |
Published |
New Zealand
Dove Medical Press Limited
01.06.2019
Dove Dove Medical Press |
Subjects | |
Online Access | Get full text |
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Summary: | Renal cell carcinoma (RCC) is one of the most common types of urological malignant tumors. Despite recent advances in diagnosis and management of RCC, its prognosis remains poor. Emerging evidence has shown that long noncoding RNAs (lncRNAs) play crucial regulatory roles in cancer biology.
The most abundant transcript of long intergenic non-protein coding RNA p53 induced transcript (
) in clear cell RCC (ccRCC) was determined by RT-PCR. Quantitative real-time PCR was performed to examine
expression in paired ccRCC samples and cell lines. The relationship of
expression with clinicopathologic characteristics and clinical outcome was analyzed. The biological function of
was studied by MTS and colony formation. The flow cytometry was used to analyze cell cycle distribution and apoptosis. The subcelluar fractionation and RIP assay was performed to explore the molecular mechanism of
Western blotting and immunofluorescence was carried out to examine EZH2 and p53.
We found that the
was frequently upregulated in ccRCC samples. Furthermore, we observed that the level of
depended on gender as well as on pT and TNM stage of patients with ccRCC. Moreover, patients with high
expression had poor disease-free survival and overall survival. Functionally, overexpression of
promoted ccRCC cell proliferation, induced cell cycle progression, and inhibited apoptosis.
was primarily located in cell nuclei and interacted with EZH2. When EZH2 was knocked down in 769P and OS-RC-2 cells overexpressing
, the effect of
on cell proliferation, cell cycle, and apoptosis was partially reversed. Additionally, inducing p53 by doxorubicin (Dox) promoted
expression.
Collectively, our results provide novel insights into the important role of
in ccRCC development and indicate that
may serve as a valuable prognostic biomarker for ccRCC. |
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Bibliography: | ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 |
ISSN: | 1178-6930 1178-6930 |
DOI: | 10.2147/OTT.S202938 |