MicroRNA-203 Increases Cell Radiosensitivity via Directly Targeting Bmi-1 in Hepatocellular Carcinoma.
Mol Pharm
; 15(8): 3205-3215, 2018 08 06.
Article
em En
| MEDLINE
| ID: mdl-29906128
ABSTRACT
BACKGROUND:
B-cell-specific moloney leukemia virus insertion site 1 (Bmi-1) plays important roles in various cancers, but its regulation through microRNAs (miRNAs) and its functions in hepatocellular carcinoma (HCC) remains unclear.METHODS:
We evaluated the expression and prognostic significance of Bmi-1 in HCC by using tissue samples and The Cancer Genome Atlas (TCGA) data sets. The relationship between miRNAs and Bmi-1 was verified by bioinformatics prediction and immunofluorescence. Colony formation and apoptosis assays were used to reveal the effect of miR-203 on radiosensitivity.RESULTS:
The Bmi-1 mRNA and protein were upregulated in HCC tissues. Cox regression multivariate analyses showed that Bmi-1 overexpression was an independent prognostic parameter for HCC patients. The expression level of Bmi-1 was negatively associated with miR-203 levels in HCC tissues. Dual-luciferase reporter assays showed that miR-203 could target the 3' untranslated region (3'-UTR) of Bmi-1 directly. Overexpression of miR-203 in HepG2 and Smmc-7721 cells increases their sensitivity to ionizing radiation in vitro and in vivo. Moreover, the improved cell radiosensitivity induced by miR-203 could be rescued by restoration of Bmi-1 expression.CONCLUSIONS:
Bmi-1 could improve the predictive accuracy for HCC patients' survival. Moreover, miR-203 enhance cell radiosensitivity in vitro and in vivo by targeting Bmi-1 in HCC.Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Tolerância a Radiação
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Biomarcadores Tumorais
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Carcinoma Hepatocelular
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MicroRNAs
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Complexo Repressor Polycomb 1
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Neoplasias Hepáticas
Tipo de estudo:
Prognostic_studies
Limite:
Female
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Humans
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Male
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Middle aged
Idioma:
En
Revista:
Mol Pharm
Assunto da revista:
BIOLOGIA MOLECULAR
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FARMACIA
/
FARMACOLOGIA
Ano de publicação:
2018
Tipo de documento:
Article
País de afiliação:
China