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The enemy within: an epigenetic role of retrotransposons in cancer initiation

Adam S Wilkins1

  • 1Wissenschaftskolleg zu Berlin, Berlin, Germany. wilkins316@btinternet.com

Bioessays : News and Reviews in Molecular, Cellular and Developmental Biology
|August 18, 2010
PubMed

Insights

This study proposes that retrotransposon (RTN) activation, influenced by gene regulation changes, can initiate cancer. This new cancer theory integrates aging, DNA demethylation, and chromosomal aberrations, unifying complex cancer phenomena.

Area of Science:

  • Oncology
  • Molecular Biology
  • Genetics

Background:

  • Cancer development is complex, involving genetic and epigenetic factors.
  • Retrotransposons (RTNs) are mobile genetic elements with largely unknown roles in cancer initiation.
  • Existing cancer theories, like somatic mutation theory, do not fully explain all observed cancer phenomena.

Purpose of the Study:

  • To propose a novel hypothesis linking retrotransposon (RTN) activation to cancer initiation.
  • To explore the mechanisms and contributing factors involved in RTN-induced cancer.
  • To integrate this hypothesis with existing cancer research and phenomenology.

Main Methods:

  • Hypothesis formulation based on existing literature.
  • Discussion of physiological stress in RTN activation.
  • Analysis of DNA demethylation's role in RTN states.
  • Exploration of the link between aging and cancer incidence.
  • Examination of RTN involvement in chromosomal aberrations.

Main Results:

  • Proposes that altered transcriptional regulation of nearby genes can activate RTNs.
  • Suggests physiological stress and DNA demethylation are key in RTN activation and propagation.
  • Connects aging, RTN activation, and increased cancer incidence.
  • Highlights activated RTNs' role in cancer-related chromosomal aberrations.

Conclusions:

  • Retrotransposon (RTN) activation offers a unifying framework for understanding cancer initiation and progression.
  • This hypothesis complements, rather than replaces, established cancer theories like somatic mutation theory.
  • The proposed model helps integrate diverse aspects of cancer biology, including aging and chromosomal instability.

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