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Epigenomic Regulation of Smad1 Signaling During Cellular Senescence Induced by Ras Activation

Atsushi Kaneda1,2,3, Aya Nonaka4, Takanori Fujita4

  • 1Genome Science Division, Research Center for Advanced Science and Technology (RCAST), The University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo, 153-8904, Japan. kaneda@genome.rcast.u-tokyo.ac.jp.

Methods in Molecular Biology (Clifton, N.J.)
|November 2, 2015
PubMed

Insights

Epigenomic alterations regulate gene expression and oncogene-induced senescence. Harmonized epigenomic changes involving the Bmp2-Smad1 pathway are crucial for Ras-induced senescence in mouse cells.

Area of Science:

  • Molecular Biology
  • Epigenetics
  • Cellular Biology

Background:

  • Epigenomic modification is crucial for gene regulation in development, differentiation, and senescence.
  • Oncogene activation triggers cellular senescence, a stable growth arrest that prevents proliferation.
  • Ras-induced senescence involves complex regulatory mechanisms.

Purpose of the Study:

  • To investigate the role of epigenomic alterations in oncogene-induced senescence.
  • To identify key signaling pathways involved in Ras-induced senescence.
  • To describe methods for analyzing epigenomic changes and Smad1 targets.

Main Methods:

  • Genome-wide analyses were employed to identify epigenomic alterations.
  • Specific focus on the Bmp2-Smad1 signaling pathway.
  • Methods for analyzing Smad1 targets on a genome-wide scale were developed.

Main Results:

  • Harmonized epigenomic alteration of the Bmp2-Smad1 signal is critical in Ras-induced senescence.
  • This pathway plays a significant role in the senescence of mouse embryonic fibroblasts.
  • The study details the analytical approaches used.

Conclusions:

  • Epigenomic regulation, particularly involving the Bmp2-Smad1 pathway, is a key determinant of oncogene-induced senescence.
  • Understanding these mechanisms provides insights into cellular growth control.
  • The described methods facilitate further research into epigenomic alterations and senescence.
Keywords:
Bmp2Chromatin immunoprecipitation (ChIP)EpigeneticsHistoneSmad1

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