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Comparative biology of mammalian telomeres: hypotheses on ancestral states and the roles of telomeres in longevity determination.


ABSTRACT: Progressive telomere shortening from cell division (replicative aging) provides a barrier for human tumor progression. This program is not conserved in laboratory mice, which have longer telomeres and constitutive telomerase. Wild species that do/do not use replicative aging have been reported, but the evolution of different phenotypes and a conceptual framework for understanding their uses of telomeres is lacking. We examined telomeres/telomerase in cultured cells from >?60 mammalian species to place different uses of telomeres in a broad mammalian context. Phylogeny-based statistical analysis reconstructed ancestral states. Our analysis suggested that the ancestral mammalian phenotype included short telomeres (

SUBMITTER: Gomes NM 

PROVIDER: S-EPMC3387546 | biostudies-literature | 2011 Oct

REPOSITORIES: biostudies-literature

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Comparative biology of mammalian telomeres: hypotheses on ancestral states and the roles of telomeres in longevity determination.

Gomes Nuno M V NM   Ryder Oliver A OA   Houck Marlys L ML   Charter Suellen J SJ   Walker William W   Forsyth Nicholas R NR   Austad Steven N SN   Venditti Chris C   Pagel Mark M   Shay Jerry W JW   Wright Woodring E WE  

Aging cell 20110601 5


Progressive telomere shortening from cell division (replicative aging) provides a barrier for human tumor progression. This program is not conserved in laboratory mice, which have longer telomeres and constitutive telomerase. Wild species that do/do not use replicative aging have been reported, but the evolution of different phenotypes and a conceptual framework for understanding their uses of telomeres is lacking. We examined telomeres/telomerase in cultured cells from > 60 mammalian species to  ...[more]

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