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Paternal Age and Transgenerational Telomere Length Maintenance: A Simulation Model.

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Paternal age at conception (PAC) influences offspring telomere length (TL). A model shows an isometric PAC midpoint (PACmp) regulates TL across generations, with implications for cancer adaptation.

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Area of Science:

  • Genetics
  • Evolutionary Biology
  • Demography

Background:

  • Offspring telomere length (TL) shows a positive correlation with paternal age at conception (PAC).
  • The biological implications of the PAC effect on TL at the population level remain unclear.

Purpose of the Study:

  • To investigate the transgenerational effects of PAC on TL using a probabilistic model.
  • To explore the role of PAC in population-level TL dynamics and adaptation over 1,000 years.

Main Methods:

  • Development of a probabilistic model incorporating transgenerational TL dynamics and population dynamics.
  • Simulation of the PAC effect on TL across 1,000 years.
  • Analysis of the relationship between PAC, TL, and cancer incidence.

Main Results:

  • Identification of an isometric PAC midpoint (PACmp) that modulates TL across generations.
  • Offspring conceived by younger fathers (< PACmp) exhibit shorter TL, while those conceived by older fathers (> PACmp) show longer TL.
  • A decrease in average PAC below PACmp is associated with transgenerational adaptation to escalating cancer incidence through TL shortening.

Conclusions:

  • PAC plays a crucial role in maintaining optimal TL across generations.
  • The PAC mechanism may facilitate transgenerational adaptation to environmental pressures, such as increased cancer incidence.
  • The study proposes a novel link between paternal age, TL, and population-level evolutionary adaptation.