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Article Dans Une Revue Proceedings of the Royal Society B: Biological Sciences Année : 2023

Temperature-independent telomere lengthening with age in the long-lived human fish (Proteus anguinus)

Résumé

Despite number of studies showing negative relationship between age and telomere length, the universality of this pattern has been recently challenged mainly in ectothermic animals exhibiting diverse effect of age on telomere shortening. However, data on ectotherms may be strongly affected by thermal history of the individuals. We thus investigated the age-related changes in relative telomere length in the skin of a small but long-lived amphibian living naturally in stable thermal environment over its entire life allowing the comparison with other homeotherms animals like birds and mammals. The present data showed a positive relation between telomere length and individual age, independent of sex and body size. A segmented analysis highlighted a breakpoint in the telomere length-age relationship, suggesting that telomere length reached a plateau at the age of 25 years. Further studies focusing on the biology of animals that live much longer than expected based on body mass will contribute to our better understanding of how ageing processes evolved and may also bring innovation for extend human health span.
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hal-04090282 , version 1 (05-05-2023)

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Yann Voituron, Olivier Guillaume, Adeline Dumet, Sandrine Zahn, Francois Criscuolo. Temperature-independent telomere lengthening with age in the long-lived human fish (Proteus anguinus). Proceedings of the Royal Society B: Biological Sciences, 2023, 290 (1998), pp.20230503. ⟨10.1098/rspb.2023.0503⟩. ⟨hal-04090282⟩
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