Yuchong Peng1, Weiye Leng2, Shigang Duan2, Ming Hong2. 1. Department of General Surgery, The Ninth People's Hospital of Chongqing, Chongqing, 400700, China. Electronic address: yuchong2018_peng@aol.com. 2. Department of General Surgery, The Ninth People's Hospital of Chongqing, Chongqing, 400700, China.
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.
OBJECTIVE: In this work, we explored the expression and mechanistic role of long noncoding RNA (lncRNA), bladder cancer associated transcript 1 (BLACAT1) in humanhepatocellular 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 humanHCC 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.
Authors: Xiaosong Wei; Xiaoming Yang; Beibei Wang; Yang Yang; Zhiwei Fang; Chengzhi Yi; Lei Shi; Dongkui Song Journal: Cancer Med Date: 2019-11-25 Impact factor: 4.452