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High MYC Levels Favour Multifocal Carcinogenesis.

Manuela Sollazzo1, China Genchi1, Simona Paglia1

  • 1Cancer Evolution Laboratory, Department of Pharmacy and Biotechnology, University of Bologna, Bologna, Italy.

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|January 9, 2019
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High MYC levels drive early cancer development through cell competition, initiating field cancerisation. This study uses a Drosophila model to reveal molecular changes in pre-malignant tissues.

Keywords:
DrosophilaMYCTSGscell competitionfield cancerisationmultifocality

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Area of Science:

  • Cellular Biology
  • Developmental Biology
  • Cancer Research

Background:

  • Field cancerisation involves molecular alterations leading to multifocal tumourigenesis.
  • Cell competition, where fitter cells outcompete neighbours, is a known biological process.
  • MYC upregulation is common in human cancers and linked to super-competitor cell behaviour.

Purpose of the Study:

  • To investigate the role of MYC-mediated cell competition in initiating field cancerisation.
  • To establish a Drosophila model for studying early carcinogenesis.
  • To identify early molecular alterations in pre-malignant tissues.

Main Methods:

  • Overexpression of MYC in specific regions of Drosophila larval wing epithelium.
  • Induction of secondary mutations in high MYC-expressing epithelia.
  • Observation of cellular responses and tissue growth patterns.

Main Results:

  • MYC overexpression triggered cellular responses mirroring mammalian pre-malignant tissues.
  • High MYC-expressing epithelia showed susceptibility to multifocal growth after secondary mutations.
  • Established a genetically tractable model for studying early carcinogenesis.

Conclusions:

  • MYC-mediated cell competition is a key driver of early field cancerisation.
  • The Drosophila model effectively recapitulates hallmarks of mammalian pre-cancerous fields.
  • Identified an early molecular event critical for initiating carcinogenesis.