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Polycomb and lung cancer: When the dosage makes the (kind of) poison

Gaetano Gargiulo1, Elisabetta Citterio1, Michela Serresi1

  • 1Division of Molecular Genetics, The Netherlands Cancer Institute , Amsterdam, The Netherlands.

Molecular & Cellular Oncology
|June 18, 2016
PubMed

Insights

Polycomb repressive complex-2 (PRC2) genes Ezh2 and Eed are key drivers in oncogenesis. PRC2 dosage influences lung tumor growth and the function of surrounding healthy tissues.

Area of Science:

  • Molecular Biology
  • Cancer Research
  • Epigenetics

Background:

  • Polycomb transcriptional repressors are crucial for maintaining normal tissue homeostasis.
  • Dysregulation of these repressors is frequently observed in cancer development.
  • The Polycomb repressive complex-2 (PRC2) genes, Ezh2 and Eed, have been identified as oncogenotype-dependent cancer genes.

Purpose of the Study:

  • To investigate the role of PRC2 genes (Ezh2 and Eed) in oncogenesis.
  • To understand how PRC2 dosage affects lung tumor homeostasis within a specific oncogenotype.
  • To determine the impact of PRC2 on non-tumorigenic tissue function in the context of oncogenesis.

Main Methods:

  • Gene expression analysis of Ezh2 and Eed in cancer models.
  • Functional studies assessing the impact of PRC2 modulation on tumor growth.
  • Histological and molecular analyses of tumor and adjacent non-tumor tissues.

Main Results:

  • Ezh2 and Eed were confirmed as oncogenotype-dependent cancer genes.
  • PRC2 dosage was found to significantly modulate lung tumor homeostasis.
  • Altered PRC2 levels critically impacted the function of non-tumor tissues within the same oncogenotype.

Conclusions:

  • PRC2 plays a dual role in cancer, influencing both tumor progression and the surrounding tissue microenvironment.
  • Targeting PRC2 may offer therapeutic strategies for modulating tumor growth and mitigating off-target tissue effects.
  • Understanding oncogenotype-specific PRC2 function is critical for effective cancer treatment.
Keywords:
EpigeneticsEzh2KrasLung CancerPolycombinflammationp53

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