High expression of long non‑coding HOTAIR correlated with hepatocarcinogenesis and metastasis

Zhong,Da‑Ni; Luo,Yi‑Huan; Mo,Wei‑Jia; Zhang,Xin; Tan,Zhong; Zhao,Na; Pang,Si‑Min; Chen,Gang; Rong,Min‑Hua; Tang,Wei

doi:10.3892/mmr.2017.7999

High expression of long non‑coding HOTAIR correlated with hepatocarcinogenesis and metastasis

Authors:
- Da‑Ni Zhong
- Yi‑Huan Luo
- Wei‑Jia Mo
- Xin Zhang
- Zhong Tan
- Na Zhao
- Si‑Min Pang
- Gang Chen
- Min‑Hua Rong
- Wei Tang
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Affiliations: Department of Chemotherapy, Guangxi Medical University, Nanning, Guangxi Zhuang Autonomous Region 530021, P.R. China, Research Department, Affiliated Cancer Hospital, Guangxi Medical University, Nanning, Guangxi Zhuang Autonomous Region 530021, P.R. China, Department of Pathology, First Affiliated Hospital of Guangxi Medical University, Nanning, Guangxi Zhuang Autonomous Region 530021, P.R. China, Department of Breast Surgery, Affiliated Cancer Hospital, Guangxi Medical University, Nanning, Guangxi Zhuang Autonomous Region 530021, P.R. China
Published online on: November 7, 2017 https://doi.org/10.3892/mmr.2017.7999
Pages: 1148-1156

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Abstract

HOX transcript antisense RNA (HOTAIR), a newly discovered long noncoding RNA (lncRNA), has been reported to be a poor prognostic marker in many types of cancers. The current study attempted to investigate the biological roles and clinicopathlogical implications of HOTAIR in hepatocellular carcinoma (HCC), as well as understand the molecular mechanisms of HOTAIR in HCC progression. HOTAIR expression in 95 HCC patients with paired HCC tissues and adjacent non‑cancer tissues were investigated using quantitative reverse transcription‑polymerase chain reaction. The association between HOTAIR expression and clinicopathological features was assessed. The effects of HOTAIR were examined in vitro assays by silencing the lncRNA. Pathway analyses were performed to illustrate the biological functions of the HOTAIR and coexpression genes. The expression level of HOTAIR was observed significantly higher in the HCC tissue than the adjacent non‑tumor tissue. HOTAIR expression levels were significantly higher in tumor samples from patients with distant metastasis, advanced stage, portal vein tumor embolus, vasoinvasion, tumor capsular infiltration or positive nm23 expression than those from patients without these conditions, correspondingly. The silencing of HOTAIR in liver cancer cells induced the inhibition of cell proliferation and promotion of apoptosis. Several pathways such as extracellular matrix‑receptor interaction, focal adhesion, pathways in cancer were annotated with the HOTAIR and coexpression genes. In summary, the present analysis indicates that HOTAIR might be an oncogene in HCC. It functions though promoting tumor cell growth and inhibiting apoptosis. HOTAIR may potentially be involved in HCC metastatic progression by several pathways correlated to cell adhesion, and may be a therapeutic target in future.

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