@article{fdi:010058935, title = {{P}eto's paradox revisited : theoretical evolutionary dynamics of cancer in wild populations}, author = {{R}oche, {B}enjamin and {S}prouffske, {K}. and {H}bid, {H}. and {M}iss{\'e}, {D}oroth{\'e}e and {T}homas, {F}.}, editor = {}, language = {{ENG}}, abstract = {{I}f the occurrence of cancer is the result of a random lottery among cells, then body mass, a surrogate for cells number, should predict cancer incidence. {D}espite some support in humans, this assertion does not hold over the range of different natural animal species where cancer incidence is known. {E}xplaining the so-called {P}eto's paradox' is likely to increase our understanding of how cancer defense mechanisms are shaped by natural selection. {H}ere, we study how body mass may affect the evolutionary dynamics of tumor suppressor gene ({TSG}) inactivation and oncogene activation in natural animal species. {W}e show that the rate of {TSG} inactivation should evolve to lower values along a gradient of body mass in a nonlinear manner, having a threshold beyond which benefits to adaptive traits cannot overcome their costs. {W}e also show that oncogenes may be frequently activated within populations of large organisms. {W}e then propose experimental settings that can be employed to identify protection mechanisms against cancer. {W}e finally highlight fundamental species traits that natural selection should favor against carcinogenesis. {W}e conclude on the necessity of comparing genomes between populations of a single species or genomes between species to better understand how evolution has molded protective mechanisms against cancer development and associated mortality.}, keywords = {biomedicine ; disease biology ; evolutionary medicine ; evolutionary theory}, booktitle = {}, journal = {{E}volutionary {A}pplications}, volume = {6}, numero = {1}, pages = {109--116}, ISSN = {1752-4571}, year = {2013}, DOI = {10.1111/eva.12025}, URL = {https://www.documentation.ird.fr/hor/fdi:010058935}, }