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Area of Science:

  • Comparative oncology
  • Evolutionary biology
  • Herpetology

Background:

  • Turtles exhibit extreme longevity and body size variation.
  • Large, long-lived organisms typically face higher cancer risks due to increased cell numbers and turnover.
  • Cancer appears exceptionally rare in turtles, defying theoretical expectations.

Purpose of the Study:

  • To synthesize current knowledge on cancer prevalence in turtles.
  • To present new data reinforcing the pattern of low cancer incidence in turtles.
  • To explore potential molecular mechanisms behind turtle cancer resistance.

Main Methods:

  • Literature review of existing studies on turtle cancer.
  • Analysis of data from zoo necropsies and pathology reports.
  • Inclusion of new data from additional turtle species.

Main Results:

  • Data from multiple species confirm the exceptionally low prevalence of cancer in turtles.
  • Emerging molecular evidence points to high resistance to oxidative stress and protein dysregulation in turtles.
  • These factors may contribute to the observed cancer resistance in these long-lived reptiles.

Conclusions:

  • Turtles possess remarkable natural cancer suppression mechanisms.
  • Their unique physiology and longevity make them a valuable model for studying cancer resistance.
  • Further research into turtle biology can illuminate the evolution of longevity and cancer suppression.