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Hypermethylation-mediated silencing of NDRG4 promotes pancreatic ductal adenocarcinoma by regulating mitochondrial

Hao-Hong Shi1, Hai-E Liu1, Xing-Jing Luo2

  • 1Department of Anesthesia, Children's Hospital of Fudan University, Shanghai 201102, China.

BMB Reports
|December 10, 2020
PubMed

Insights

Epigenetic silencing of NDRG4 promotes pancreatic cancer by impairing mitochondrial function. Restoring NDRG4 suppresses tumor growth and metastasis, suggesting NDRG4 as a potential biomarker for pancreatic ductal adenocarcinoma (PDAC).

Area of Science:

  • Oncology
  • Molecular Biology
  • Epigenetics

Background:

  • N-myc downstream regulated gene (NDRG) family members are implicated in cancer progression.
  • The role of NDRG4 in pancreatic ductal adenocarcinoma (PDAC) remains largely unexplored.

Purpose of the Study:

  • To investigate the expression pattern of NDRG4 in PDAC.
  • To evaluate the cellular biological effects of NDRG4 in PDAC.
  • To elucidate the mechanism of NDRG4 dysregulation in PDAC.

Main Methods:

  • Data mining of PDAC tissues and cell lines.
  • Analysis of DNA methylation patterns.
  • Overexpression and knockdown studies of NDRG4.
  • Assessment of mitochondrial function (ATP production, membrane potential, morphology).

Main Results:

  • NDRG4 is significantly downregulated in PDAC tissues and cells, associated with poor prognosis.
  • DNA methylation-driven hypermethylation correlates with NDRG4 downregulation.
  • NDRG4 overexpression suppresses PDAC cell growth and metastasis.
  • Upregulated NDRG4 attenuates mitochondrial function, leading to reduced ATP production and increased mitochondrial fragmentation.

Conclusions:

  • Epigenetic silencing of NDRG4 promotes PDAC progression by regulating mitochondrial function.
  • NDRG4 acts as a tumor suppressor in PDAC.
  • NDRG4 is a potential prognostic biomarker for PDAC patients.

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