Long noncoding RNA BLACAT1 is overexpressed in hepatocellular carcinoma and its downregulation suppressed cancer cell development through endogenously competing against hsa-miR-485-5p - 16/06/19
, Weiye Leng, Shigang Duan, Ming HongBienvenue sur EM-consulte, la référence des professionnels de santé.
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| pages | 8 |
| Iconographies | 5 |
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Highlights |
• | BLACAT1was found to be overexpressed in both HCC cells and human HCC tumors. |
• | BLACAT1 downregulation inhibited HCC in vitro cell proliferation and invasion. |
• | BLACAT1 downregulation inhibited HCC in vivo xenograft growth. |
• | Has-miR-485-5p was confirmed to be inversely regulated by BLACAT1 in HCC. |
• | Has-miR-485-5p downregulation reversed the inhibitory effects of BLACAT1 in HCC. |
Abstract |
Objective |
In this work, we explored the expression and mechanistic role of long noncoding RNA (lncRNA), bladder cancer associated transcript 1 (BLACAT1) in human hepatocellular carcinoma (HCC).
Methods |
BLACAT1 expression in bothin vitro HCC cell lines and in vivo human HCC clinical samples were assessed by qRT-PCR. In HeG2 and MHCC97 L cells, BLACAT1 downregulation was induced by lentiviral infection to evaluate its functions in regulating HCC cancer cell proliferation and invasion in vitro, and xenograft in vivo. A BLACAT1 endogenously competing candidate, human microRNA-485-5p (has-miR-485-5p) was assessed in dual-luciferase assay and qRT-PCR in HCC cells. Furthermore, has-miR-485-5p was inhibited in BLACAT1-downregulated HeG2 and MHCC97 L cells to evaluate the correlation of has-miR-485-5p in BLACAT1-associated functional regulation in HCC cells.
Results |
BLACAT1was found to be overexpressed in both HCC cells and human HCC tumors. In HeG2 and MHCC97 L cells, lentivirus-induced BLACAT1 downregulation inhibited cancer cellin vitro proliferation and invasion, and in vivo xenograft growth. Has-miR-485-5p was confirmed to be bound by BLACAT1 and its expression in HCC cells inversely regulated by BLACAT1. Then, has-miR-485-5p downregulation reversed the inhibitory effects of BLACAT1 downregulation on HCC cancer cell in vitro functions.
Conclusion |
BLACAT1 is aberrantly upregulated in HCC and its inhibition had tumor suppressing effects in human HCC, possibly through endogenously competing against has-miR-485-5p. The BLACAT1/ has-miR-485-5p regulatory axis may be a molecular target for future HCC therapy.
Le texte complet de cet article est disponible en PDF.Keywords : Hepatocellular carcinoma, lncRNA, BLACAT, miRNA, has-miR-485-5p
Plan
Vol 116
Article 109027- août 2019 Retour au numéro
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