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MicroRNA-223-5p targets long non-coding RNA TP73 antisense RNA1 to promote the invasion of gastric cancer

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Abstract

Long non-coding RNA (lncRNA) TP73 antisense RNA 1 (TP73-AS1) has been characterized as an oncogenic lncRNA in GC. However, by analyzing The Cancer Genome Atlas (TCGA) dataset we observed the downregulation of TP73-AS1 in GC. In addition, TP73-AS1 is predicted to interact with microRNA-223-5p (miR-223-5p), which is also a critical player in cancer biology. This study was therefore carried out to investigate the roles of miR-223-5p and TP73-AS1 in gastric cancer (GC) and to explore the interactions between them. In this study, 68 GC patients were included as research subjects. Expression of miR-223-5p and TP73-AS1 was analyzed by RT-qPCR. Dual-luciferase assay and overexpression experiments were used to analyze gene interactions. Transwell assays were used to analyze cell invasion and migration. We found that miR-223-5p was upregulated and TP73-AS1 was downregulated in GC and they were inversely correlated. Altered miR-223-5p and TP73-AS1 expression predicted poor disease-specific survival. Dual-luciferase assay showed that miR-223-5p may bind TP73-AS1 and overexpression experiments showed that miR-223-5p overexpression downregulated TP73-AS1 in gastric cancer cells. Cell invasion and migration assays showed that miR-223-5p could promote the invasion and migration of gastric cancer cells, while TP73-AS1 could inhibit the invasion and migration of gastric cancer cells. In addition, miR-223-5p attenuated the effects of TP73-AS1 overexpression. Therefore, miR-223-5p may target TP73-AS1 to promote the invasion and migration of gastric cancer patients.

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Authors and Affiliations

  1. Department of Clinical Laboratory, The First Affiliated Hospital, Xi’an Jiaotong University, Xi’an, Shaanxi, 710061, People’s Republic of China

    Junhui Liu

  2. Department of General Surgery, The First Affiliated Hospital, Xi’an Jiaotong University, West Yanta Road 274, Xi’an, Shaanxi, 710061, People’s Republic of China

    Haijiang Wang & Xinhua Liao

Authors
  1. Junhui Liu
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  2. Haijiang Wang
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  3. Xinhua Liao
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Correspondence to Xinhua Liao.

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The authors declare that they have no competing interests.

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The study was performed in accordance with the Declaration of Helsinki and obtained the approval from the Ethics Committee of The First Affiliated Hospital of Xi'an Jiaotong University. All animal experiments were approved by the Animal Care and Use Committee of The First Affiliated Hospital of Xi'an Jiaotong University.

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Liu, J., Wang, H. & Liao, X. MicroRNA-223-5p targets long non-coding RNA TP73 antisense RNA1 to promote the invasion of gastric cancer. Human Cell 33, 676–682 (2020). https://doi.org/10.1007/s13577-020-00349-3

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  • DOI: https://doi.org/10.1007/s13577-020-00349-3

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