1. Academic Validation
  2. Long noncoding RNA TP53TG1 suppresses the growth and metastasis of hepatocellular carcinoma by regulating the PRDX4/β-catenin pathway

Long noncoding RNA TP53TG1 suppresses the growth and metastasis of hepatocellular carcinoma by regulating the PRDX4/β-catenin pathway

  • Cancer Lett. 2021 Aug 10;513:75-89. doi: 10.1016/j.canlet.2021.04.022.
Baiyang Chen 1 Jianwei Lan 2 Yusha Xiao 2 Pengpeng Liu 2 Deliang Guo 2 Yang Gu 2 Youai Song 2 Qiu Zhong 2 Dong Ma 2 Ping Lei 3 Quanyan Liu 4
Affiliations

Affiliations

  • 1 Department of General Surgery, Xiangyang Central Hospital, Affiliated with Hubei University of Arts and Science, Xiangyang, Hubei, PR China; Department of General Surgery, Zhongnan Hospital of Wuhan University, Wuhan, Hubei, PR China.
  • 2 Department of General Surgery, Zhongnan Hospital of Wuhan University, Wuhan, Hubei, PR China.
  • 3 Department of Geriatrics, Tianjin Medical University General Hospital, Tianjin, 300052, PR China. Electronic address: leiping1974@163.com.
  • 4 Department of Hepatobiliary Surgery, Tianjin Medical University General Hospital, Tianjin, 300052, PR China. Electronic address: spsslqy@vip.126.com.
Abstract

Emerging evidence has shown that aberrant expression of lncRNA-TP53TG1 plays important roles in various malignancies. However, the biological functions of lncRNA-TP53TG1 in hepatocarcinogenesis, as well as the underlying mechanisms, remain largely unknown. Here, we assessed whether lncRNA-TP53TG1 plays a key role in the progression of hepatocellular carcinoma (HCC). The expression of lncRNA-TP53TG1 was significantly decreased in HCC tissues and cells. Decreased expression of lncRNA-TP53TG1 was associated with aggressive clinical phenotypes and a poor prognosis. Ectopic expression of lncRNA-TP53TG1 inhibited hepatoma cell proliferation and migration in vitro and in vivo, whereas lncRNA-TP53TG1 knockdown exerted the opposite effects. Furthermore, lncRNA-TP53TG1 played an important role in slowing the epithelial-mesenchymal transition (EMT) process in HCC. Mechanistically, lncRNA-TP53TG1 physically interacted with PRDX4 and promoted its ubiquitin-mediated degradation, resulting in the inactivation of the Wnt/β-catenin signaling pathway in hepatoma cells. Our findings demonstrate a novel mechanism by which lncRNA-TP53TG1 exerts its tumor-suppressive effects through the Wnt/β-catenin signaling pathway in a PRDX4-mediated manner in HCC. Based on these results, lncRNA-TP53TG1 potentially represents a prognostic indicator and therapeutic target for patients with HCC.

Keywords

Epithelial-mesenchymal transition; Hepatocellular carcinoma; Long noncoding RNA TP53TG1; PRDX4; β-catenin.

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