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Related Experiment Video

Updated: Mar 1, 2026

In Vitro Cultivation Techniques for Modeling Liver Organogenesis, Building Assembloids, and Designing Synthetic Tissues using Human Cell Lines
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HBx-mediated decrease of AIM2 contributes to hepatocellular carcinoma metastasis.

Shi-Lu Chen1,2, Li-Li Liu1,2, Shi-Xun Lu1,2

  • 1Sun Yat-Sen University Cancer Center, State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Guangzhou, China.

Molecular Oncology
|June 6, 2017
PubMed
Summary
This summary is machine-generated.

Hepatocellular carcinoma (HCC) metastasis is linked to reduced Absent in melanoma 2 (AIM2) protein. Hepatitis B virus X protein (HBx) lowers AIM2, promoting HCC cell migration and metastasis via epithelial-mesenchymal transition (EMT).

Keywords:
EMTabsent in melanoma 2hepatitis B virushepatocellular carcinoma

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Area of Science:

  • Oncology
  • Molecular Biology
  • Hepatology

Background:

  • Tumor metastasis significantly contributes to hepatocellular carcinoma (HCC) mortality.
  • The role of Absent in melanoma 2 (AIM2) in HCC metastasis is currently unknown.
  • AIM2 is recognized for its involvement in inflammation and carcinogenesis.

Purpose of the Study:

  • To investigate the role of AIM2 in HCC metastasis.
  • To elucidate the regulatory mechanisms of AIM2 expression in HCC.
  • To assess AIM2 as a prognostic biomarker and therapeutic target for HCC.

Main Methods:

  • Quantitative analysis of AIM2 protein expression in HCC cell lines and clinical samples.
  • In vitro studies to assess the effect of hepatitis B virus X protein (HBx) on AIM2 expression and stability.
  • Functional assays including cell migration, wound healing, and metastasis models to evaluate the impact of AIM2 modulation.
  • Analysis of epithelial-mesenchymal transition (EMT) markers and downstream effectors like Fibronectin 1 (FN1).

Main Results:

  • AIM2 protein expression was significantly reduced in HCC tissues and cell lines.
  • Reduced AIM2 expression correlated with advanced tumor features and poor patient survival.
  • HBx protein suppressed AIM2 expression by enhancing Enhancer of zeste homolog 2 (EZH2) stability and promoting AIM2 ubiquitination and degradation.
  • AIM2 knockdown promoted HCC cell migration, invasion, and metastasis by inducing EMT.
  • AIM2 loss led to increased Fibronectin 1 (FN1) expression, a key mediator of cell migration.

Conclusions:

  • HBx-induced downregulation of AIM2 facilitates HCC metastasis through the activation of EMT.
  • AIM2 serves as a potential prognostic biomarker for hepatitis B virus-related HCC.
  • AIM2 represents a promising therapeutic target for inhibiting HCC metastasis.