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DNA methylation inhibitor causes cell growth retardation and gene expression changes in feline lymphoma cells

Maika Fujita1, Masahiro Kaneda1

  • 1Cooperative Department of Veterinary Medicine, Faculty of Agriculture, Tokyo University of Agriculture and Technology, 3-5-8 Saiwai-cho, Fuchu, Tokyo 183-8509, Japan.

The Journal of Veterinary Medical Science
|June 28, 2017
PubMed

Insights

The DNA methylation inhibitor 5-aza-2'-deoxycytidine (5-aza) suppressed feline lymphoma cell growth by causing DNA replication arrest. Aberrant gene expression patterns were observed, indicating potential therapeutic avenues for feline cancers.

Area of Science:

  • Epigenetics
  • Molecular Biology
  • Cancer Research

Background:

  • Aberrant DNA methylation is linked to various diseases, particularly cancers.
  • Epigenetic alterations in human cancers are well-studied, but less is known about canine and feline cancers.
  • Feline lymphoma presents an opportunity to investigate epigenetic dysregulation in animal cancers.

Purpose of the Study:

  • To investigate the effects of the DNA methylation inhibitor 5-aza-2 -deoxycytidine (5-aza) on feline lymphoma cell lines.
  • To analyze DNA methylation and gene expression changes induced by 5-aza treatment.
  • To explore the potential of epigenetic therapies for feline lymphoma.

Main Methods:

  • Treatment of three feline lymphoma cell lines (T-cell: 3281, FT-1; B-cell: MS4) with varying doses of 5-aza.
  • Cell growth assays to determine the dose-dependent effect of 5-aza.
  • Gene expression analysis, including transcription factor Sox11 and cell cycle regulator p27kip1.
  • Bisulfite sequencing to analyze DNA demethylation at specific gene promoters.
  • Cell cycle analysis to understand the mechanism of growth inhibition.

Main Results:

  • 5-aza significantly inhibited feline lymphoma cell growth in a dose-dependent manner across all tested cell lines.
  • Aberrant gene expression patterns were observed following 5-aza treatment.
  • Sox11 expression was de-repressed in 3281 cells, correlating with promoter DNA demethylation.
  • Cell growth inhibition was attributed to DNA replication arrest, evidenced by increased p27kip1 expression.

Conclusions:

  • 5-aza demonstrates suppressive effects on feline lymphoma cell growth, suggesting its potential as a therapeutic agent.
  • The observed effects involve modulation of DNA methylation and gene expression, including cell cycle regulators.
  • Further research involving normal feline lymphocytes is crucial to confirm drug specificity and explore clinical applications.
Keywords:
5-aza-2’-deoxycytidineDNA methylationSox11apoptosisfeline lymphoma

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