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Chromatin remodeling factor ARID2 suppresses hepatocellular carcinoma metastasis via DNMT1-Snail axis

Hao Jiang1,2,3, Hui-Jun Cao1, Ning Ma1

  • 1CAS Key Laboratory of Nutrition, Metabolism and Food Safety, Shanghai Institute of Nutrition and Health, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 200031 Shanghai, China.

Proceedings of the National Academy of Sciences of the United States of America
|February 20, 2020
PubMed

Insights

Chromatin remodeling factor ARID2 suppresses hepatocellular carcinoma (HCC) metastasis by inhibiting epithelial-mesenchymal transition (EMT). Decreased ARID2 levels correlate with poor prognosis, suggesting ARID2 as a therapeutic target for HCC.

Area of Science:

  • Oncology
  • Molecular Biology
  • Cancer Research

Background:

  • Hepatocellular carcinoma (HCC) metastasis is a primary challenge in treatment.
  • Mutations in the chromatin remodeling factor ARID2 are common in HCC, but its role in metastasis is unclear.

Purpose of the Study:

  • To investigate the role of ARID2 in HCC metastasis.
  • To elucidate the underlying molecular mechanisms of ARID2's function in HCC.

Main Methods:

  • Analysis of ARID2 expression in HCC tissues correlated with clinical parameters.
  • In vitro cell migration and invasion assays.
  • In vivo metastasis models in mice.
  • Mechanistic studies involving DNMT1 recruitment and Snail promoter methylation.

Main Results:

  • ARID2 expression is reduced in metastatic HCC and correlates with better patient survival.
  • ARID2 inhibits HCC cell migration, invasion, and metastasis in vivo.
  • ARID2 represses epithelial-mesenchymal transition (EMT) by recruiting DNMT1 to the Snail promoter, suppressing Snail transcription.
  • ARID2 mutants lacking functional C2H2 domains lose metastasis suppressor activity.

Conclusions:

  • ARID2 acts as a metastasis suppressor in HCC.
  • ARID2 functions by repressing EMT through epigenetic regulation of Snail.
  • ARID2 deficiency is linked to poor prognosis, identifying it as a potential therapeutic target for HCC.
Keywords:
epigenetic modificationhepatocellular carcinomametastasesmethylationmutations

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