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Chemical Dimerization-Induced Protein Condensates on Telomeres
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Why are there associations between telomere length and behaviour?

Melissa Bateson1, Daniel Nettle2

  • 1Centre for Behaviour and Evolution and Institute of Neuroscience, Newcastle University, Newcastle upon Tyne NE2 4HH, UK melissa.bateson@ncl.ac.uk.

Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences
|January 17, 2018
PubMed
Summary

Individual differences in telomere length (TL) may influence behavior, challenging the idea that behavior solely impacts TL. This selective adoption hypothesis suggests short telomeres might predispose individuals to certain behaviors, which is more plausible than behavior causing TL changes.

Keywords:
behaviourbiological agebiomarkersmokingtelomere attritiontelomere length

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Area of Science:

  • Behavioral biology
  • Genetics
  • Epidemiology

Background:

  • Individual differences in telomere length (TL) are linked to behavioral variations in humans and birds.
  • Existing research often assumes behaviors directly alter telomere dynamics.

Purpose of the Study:

  • To propose and evaluate the 'selective adoption' hypothesis as an alternative explanation for the behavior-telomere length association.
  • To differentiate predictions between the causation and selective adoption hypotheses for empirical testing.

Main Methods:

  • Theoretical modeling comparing causation vs. selective adoption hypotheses.
  • Analysis of existing evidence, using smoking behavior as a case study.
  • Emphasis on the need for longitudinal data to assess telomere attrition rates.

Main Results:

  • The evidence that specific behaviors, like smoking, accelerate telomere attrition within individuals is currently weak.
  • The selective adoption hypothesis is mechanistically plausible and better supported by current empirical data.
  • Early-life adversity is proposed as a potential third variable influencing both behavior and telomere length.

Conclusions:

  • The selective adoption hypothesis offers a more parsimonious explanation for the observed association between behavior and telomere length.
  • Future longitudinal studies should focus on differential rates of telomere attrition to distinguish between causal pathways.