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Updated: May 22, 2026

Spatial and Temporal Analysis of Active ERK in the C. elegans Germline
08:40

Spatial and Temporal Analysis of Active ERK in the C. elegans Germline

Published on: November 29, 2016

Ectopic ERK expression induces phenotypic conversion of C10 cells and alters DNA methyltransferase expression

Ryan L Sontag1, Thomas J Weber

  • 1Systems Toxicology, Pacific Northwest National Laboratory, 790 6th Street, J4-02, Richland, WA 99354, USA.

BMC Research Notes
|May 8, 2012
PubMed
Abstract

Insights

Extracellular signal-regulated kinase (ERK) expression in lung cells promotes cancer-like growth and alters DNA methyltransferases (DNMTs). This finding suggests a new model for predicting sensitivity to DNMT inhibitors in lung cancer therapy.

Area of Science:

  • Molecular Biology
  • Cancer Research
  • Cell Biology

Background:

  • Lung carcinogens often activate mitogen-activated protein kinase (MAPK) pathways.
  • DNA methyltransferases (DNMTs) are key targets in lung cancer therapy.
  • Investigating C10 alveolar epithelial cells as a model for lung cancer research is crucial.

Purpose of the Study:

  • To determine if C10 cells are a sensitive model for studying ERK-dependent transformation.
  • To investigate DNMT expression patterns in experimental lung cancer using C10 cells.
  • To explore the link between ERK activation and DNMTs in lung carcinogenesis.

Main Methods:

  • Ectopic expression of extracellular signal-regulated kinase (ERK)-green fluorescent protein (ERK1-GFP) in C10 cells.
  • Assessing growth in soft agar to evaluate transformation.
  • Analyzing the expression of DNA methyltransferases (DNMT1 and 3b), XPA, and DNA-PKcs.
  • Measuring phosphatase activity and sensitivity to 5-azacytidine (5-azaC).

Main Results:

  • ERK1-GFP expression induced anchorage-independent growth in soft agar.
  • This transformation was linked to altered expression of DNMT1, DNMT3b, XPA, and DNA-PKcs.
  • Increased phosphatase activity and enhanced sensitivity to 5-azaC were observed.
  • These effects were latent, indicating delayed but significant changes.

Conclusions:

  • ERK activation alone can induce phenotypic changes in C10 cells.
  • Altered DNMT expression and sensitivity to DNMT inhibitors are associated with ERK activation.
  • This C10 cell model shows promise for predicting therapeutic responses to DNMT inhibitors in lung cancer.

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