Experimental increase in telomere length leads to faster feather regeneration

Sophie Reichert*, Pierre Bize, Mathilde Arrive, Sandrine Zahn, Sylvie Massemin, Francois Criscuolo

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

27 Citations (Scopus)


Telomeres - the protective ends of linear chromosomes - reveal themselves not only as a good proxy in terms of longevity, but more recently also as a marker of healthy ageing in laboratory rodents. Telomere erosion is prevented by the activation of telomerase, an enzyme suspected to be also vital for tissue regeneration and which experimental activation improves health state in mice. One emerging hypothesis is that telomerase activity accounts for the frequently reported positive links between telomere lengths and individual quality in a wide range of organisms. Still, we lack an experimental approach testing the exact impact of inter-individual differences in telomere length on individual trait variability. In a first step study, we tested the impact of the TA-65, a plant-derived product stimulating the expression and the activity of telomerase, on telomere lengths and flight feather renewal capacity of captive zebra finches (Taenopygia guttata). Telomere length was longer in TA-65 treated finches while their feather grew faster than in controls. Our data support the idea that long telomeres could reflect high telomerase activity, and in so doing be a good predictor of greater telomerase-dependent tissue regeneration, which may ultimately explain variation in organism quality and longevity. (C) 2014 Elsevier Inc. All rights reserved.

Original languageEnglish
Pages (from-to)36-38
Number of pages3
JournalExperimental Gerontology
Early online date27 Jan 2014
Publication statusPublished - Apr 2014

Bibliographical note

This work was entirely supported by a CNRS funding and a PhD grant from the Region Alsace. We thank Hranitsky Aurélie for her help with the bird husbandry.


  • Telomere
  • Telomerase
  • Feather renewal
  • Ageing
  • Birds
  • Oxidative stress
  • Capacity
  • Span


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