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Zebularine exerts its antiproliferative activity through S phase delay and cell death in human malignant mesothelioma

Yukitoshi Takemura1, Motohiko Satoh1, Kenichi Hatanaka1

  • 1a Institute of Industrial Science , The University of Tokyo , Tokyo , Japan.

Bioscience, Biotechnology, and Biochemistry
|April 25, 2018
PubMed

Insights

Zebularine, a DNA methyltransferase inhibitor, shows potential against malignant mesothelioma. It effectively inhibits cancer cell growth and induces cell death without harming normal cells.

Area of Science:

  • Oncology
  • Cancer Biology
  • Pharmacology

Background:

  • Malignant mesothelioma is an aggressive asbestos-related cancer with limited treatment options.
  • DNA methyltransferase (DNMT) inhibitors, like zebularine, have demonstrated anti-tumor effects in various cancers.
  • The efficacy of zebularine in treating malignant mesothelioma is not well-established.

Purpose of the Study:

  • To investigate the antiproliferative and cell death-inducing effects of zebularine in human malignant mesothelioma cells.
  • To determine the impact of zebularine on DNA methyltransferase 1 (DNMT1) expression in mesothelioma cells.
  • To assess the selectivity of zebularine's effects on cancer cells versus normal cells.

Main Methods:

  • Treatment of human malignant mesothelioma cells and normal fibroblast cells with varying doses of zebularine.
  • Assessment of cell growth inhibition using dose-dependent assays.
  • Analysis of DNA methyltransferase 1 (DNMT1) expression levels.
  • Cell cycle analysis to identify effects on cell proliferation.
  • Evaluation of zebularine-induced cell death.

Main Results:

  • Zebularine significantly inhibited malignant mesothelioma cell growth in a dose-dependent manner.
  • Zebularine decreased the expression of DNMT1 in a dose-dependent manner across tested mesothelioma cell lines.
  • Cell cycle analysis revealed that zebularine induced an S phase delay.
  • Zebularine treatment resulted in cell death in malignant mesothelioma cells.
  • Normal human fibroblast cells showed no significant growth inhibition or cell death upon zebularine treatment.

Conclusions:

  • Zebularine exhibits potent antiproliferative and pro-death effects specifically in malignant mesothelioma cells.
  • The drug's mechanism involves the inhibition of DNMT1 and induction of S phase delay.
  • Zebularine demonstrates a promising therapeutic potential for malignant mesothelioma treatment due to its targeted action.
Keywords:
DNA methyltransferaseMalignant mesotheliomaS phase delaycell deathzebularine

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