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Related Experiment Videos

The mutation rate and cancer

I P Tomlinson1, M R Novelli, W F Bodmer

  • 1Cancer Genetics Laboratory, Imperial Cancer Research Fund, London, United Kingdom.

Proceedings of the National Academy of Sciences of the United States of America
|December 10, 1996
PubMed
Summary
This summary is machine-generated.

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Tumor growth, a form of somatic evolution, is driven more by cell selection than by increased mutation rates. While some cancers develop a mutator phenotype for faster growth, it is not essential for cancer development.

Area of Science:

  • Oncology
  • Evolutionary Biology
  • Genetics

Background:

  • Tumorigenesis involves the accumulation of advantageous mutations.
  • Tumor growth can be viewed as somatic evolution, with cancer cells as the evolving population.
  • Previous models have debated the roles of mutation rate versus selection in cancer progression.

Purpose of the Study:

  • To determine the relative importance of mutation rate and selection in tumor growth.
  • To investigate the necessity of a 'mutator phenotype' for carcinogenesis.

Main Methods:

  • Comparative analysis of theoretical models of tumorigenesis.
  • Evaluation of the impact of selection versus mutation rate on tumor cell population dynamics.

Main Results:

Related Experiment Videos

  • Selection is a more significant driver of tumor growth than an increased mutation rate.
  • Mutator phenotypes are not a prerequisite for the development of cancer.

Conclusions:

  • Selection plays a dominant role in the evolution of tumors.
  • Carcinogenesis can occur without the acquisition of a mutator phenotype, highlighting the power of selective pressures.