miR-301a is a candidate oncogene that targets the homeobox gene Gax in human hepatocellular carcinoma.
Dig Dis Sci
; 57(5): 1171-80, 2012 May.
Article
in En
| MEDLINE
| ID: mdl-22373864
ABSTRACT
BACKGROUND:
MicroRNAs (miRNA) are a group of noncoding small RNAs that repress mRNA expression or induce mRNA degradation by binding to the 3'-untranslated regions of mRNAs. MiRNAs have been connected closely with the development of cancers such as hepatocellular carcinoma (HCC). However, the overexpression of microRNA-301a (miR-301a) has seldom been connected with tumorigenesis in HCC.AIMS:
This study aims to characterize the function of upregulated miR-301a in HCC and show how the downstream growth arrest-specific homeobox (Gax) is negatively regulated by miR-301a.METHODS:
The expression of miR-301a and Gax was detected using real-time PCR on HCC tissues and adjacent non-tumorous tissues. The luciferase reporter assay was used to assess Gax as a target of miR-301a. The nuclear factor κB (NF-κB) was measured by western blot after inhibiting miR-301a and enhancing Gax. The functions of miR-301a in vivo in HCC cells were measured by migration and invasion assays and flow cytometry.RESULTS:
MiR-301a was significantly upregulated and Gax was downregulated in HCC samples compared with in the matching nontumoral tissues. Inhibiting miR-301a expression caused the upregulation of Gax and repressed NF-κB expression. We have shown that miR-301a plays an important role in increasing proliferation, migration and invasion and in inhibiting apoptosis of HCC cells.CONCLUSIONS:
miR-301a is frequently upregulated in HCC and modulates NF-κB expression by negatively regulating Gax.
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Oncogenes
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Apoptosis
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Carcinoma, Hepatocellular
/
Homeodomain Proteins
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MicroRNAs
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Liver Neoplasms
Limits:
Adult
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Aged
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Female
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Humans
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Male
/
Middle aged
Language:
En
Journal:
Dig Dis Sci
Year:
2012
Document type:
Article
Affiliation country:
China