Abstract
Long non-coding RNAs (lncRNAs) are crucial in the invasion, angiogenesis, progression, and metastasis of hepatocellular carcinoma (HCC). The lncRNA MYLK-AS1 promotes the growth and invasion of HCC through the EGFR/HER2-ERK1/2 signaling pathway. However, the clinical significance of MYLK-AS1 in HCC still needs to be further determined. Bioinformatic analysis was performed to determine the potential relationship among MYLK-AS1, miRNAs and mRNAs. A total of 156 samples of normal liver and paired HCC tissues from HCC patients were used to evaluate MYLK-AS1 expression by qRT-PCR. Human HCC cell lines were used to evaluate the colony formation, cell proliferation, migration, invasion, cell cycle and apoptosis after transfection of lentiviral short-hairpin RNAs (shRNAs) targeting MYLK-AS1 or MYLK-AS1 vectors. The competitive endogenous RNA (ceRNA) mechanism was clarified using fluorescence in situ hybridization (FISH), Western blotting, qPCR, RNA binding protein immunoprecipitation (RIP), and dual luciferase reporter analysis. MYLK-AS1 up-regulation was detected in the HCC tumor tissues and cell lines associated with the enhancement of the angiogenesis and tumor progression. The down-regulation of MYLK-AS1 reversed the effects on angiogenesis, proliferation, invasion and metastasis in the HCC cells and in vivo. MYLK-AS1 acted as ceRNA, capable of regulating the angiogenesis in HCC, while the microRNA miR-424-5p was the direct target of MYLK-AS1. Promoting the angiogenesis and the tumor proliferation, the complex MYLK-AS1/miR-424-5p activated the VEGFR-2 signaling through E2F7, whereas the specific targeting of E2F transcription factor 7 (E2F7) by miR-424-5p, was indicated by the mechanism studies. MYLK-AS1 and E2F7 are closely related to some malignant clinicopathological features and prognosis of HCC, thus the MYLK-AS1/ miR-424-5p/E2F7 signaling pathway might represent a promising treatment strategy to combat HCC.
Keywords
Competing endogenous RNA
E2F7
Hepatocellular carcinoma
Long non-coding RNAs
MYLK-AS1
VEGFR-2
miR-424-5p
MeSH Terms
Calcium-Binding Proteins/genetics
Carcinoma, Hepatocellular/blood supply,genetics,metabolism,pathology
Disease Progression
E2F7 Transcription Factor/metabolism
Female
Humans
Liver Neoplasms/blood supply,genetics,metabolism,pathology
Male
MicroRNAs/metabolism
Middle Aged
Myosin-Light-Chain Kinase/genetics
Neovascularization, Pathologic/genetics,metabolism,pathology
Prognosis
RNA, Antisense/genetics,metabolism
RNA, Long Noncoding/metabolism
Signal Transduction
Transfection
Vascular Endothelial Growth Factor Receptor-2/metabolism
Chemicals
Calcium-Binding Proteins
E2F7 Transcription Factor
E2F7 protein, human
MIRN424 microrna, human
MicroRNAs
RNA, Antisense
RNA, Long Noncoding
Vascular Endothelial Growth Factor Receptor-2
MYLK protein, human
Myosin-Light-Chain Kinase
Authors & Affiliations
9 authors, click to expand affiliations / ORCID
Teng Fei
Department of Hepatobiliary and Pancreatic Surgery, Minhang Hospital, Fudan University, Shanghai, 201199, People's Republic of China. | Institute of Fudan-Minhang Academic Health System, Minhang Hospital, Fudan University, Shanghai, 201199, People's Republic of China.
Zhang Ju-Xiang
Shanghai Med-X Engineering Center for Medical Equipment and Technology, School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai, 200030, People's Republic of China.
Chang Qi-Meng
Department of Hepatobiliary and Pancreatic Surgery, Minhang Hospital, Fudan University, Shanghai, 201199, People's Republic of China. | Institute of Fudan-Minhang Academic Health System, Minhang Hospital, Fudan University, Shanghai, 201199, People's Republic of China.
Wu Xu-Bo
Department of Hepatobiliary and Pancreatic Surgery, Minhang Hospital, Fudan University, Shanghai, 201199, People's Republic of China. | Institute of Fudan-Minhang Academic Health System, Minhang Hospital, Fudan University, Shanghai, 201199, People's Republic of China.
Tang Wei-Guo
Department of Hepatobiliary and Pancreatic Surgery, Minhang Hospital, Fudan University, Shanghai, 201199, People's Republic of China. | Institute of Fudan-Minhang Academic Health System, Minhang Hospital, Fudan University, Shanghai, 201199, People's Republic of China.
Wang Jian-Fa
Department of Hepatobiliary and Pancreatic Surgery, Minhang Hospital, Fudan University, Shanghai, 201199, People's Republic of China. | Institute of Fudan-Minhang Academic Health System, Minhang Hospital, Fudan University, Shanghai, 201199, People's Republic of China.
Feng Jin-Feng
Department of Hepatobiliary and Pancreatic Surgery, Minhang Hospital, Fudan University, Shanghai, 201199, People's Republic of China. | Institute of Fudan-Minhang Academic Health System, Minhang Hospital, Fudan University, Shanghai, 201199, People's Republic of China.
Zhang Zi-Ping
Department of Hepatobiliary and Pancreatic Surgery, Minhang Hospital, Fudan University, Shanghai, 201199, People's Republic of China.
[email protected]. | Institute of Fudan-Minhang Academic Health System, Minhang Hospital, Fudan University, Shanghai, 201199, People's Republic of China.
[email protected].
Hu Zhi-Qiu
ORCID
Department of Hepatobiliary and Pancreatic Surgery, Minhang Hospital, Fudan University, Shanghai, 201199, People's Republic of China.
[email protected]. | Institute of Fudan-Minhang Academic Health System, Minhang Hospital, Fudan University, Shanghai, 201199, People's Republic of China.
[email protected].
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