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Epigenetic clock and methylation studies in cats.

Ken Raj1, Balazs Szladovits2, Amin Haghani3

  • 1Radiation Effects Department, Centre for Radiation, Chemical and Environmental Hazards, Public Health England, Chilton, Didcot, UK.

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|August 31, 2021
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Summary

New epigenetic clocks accurately measure age in domestic cats and other mammals. These DNA methylation biomarkers offer potential for feline health monitoring and anti-aging research.

Keywords:
AgingCatDNA methylationDevelopmentEpigenetic clock

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Area of Science:

  • Epigenetics
  • Comparative genomics
  • Biomarker development

Background:

  • Human epigenetic clocks, based on DNA methylation, are accurate aging biomarkers.
  • The principles of epigenetic aging appear conserved across mammalian species.
  • Previous research has established epigenetic clocks for mice and other mammals.

Purpose of the Study:

  • To develop and validate epigenetic clocks for the domestic cat (Felis catus).
  • To assess the cross-species applicability of feline epigenetic clocks in other mammals.
  • To explore the potential of these clocks for feline health and anti-aging research.

Main Methods:

  • Utilized DNA methylation profiles from cat samples.
  • Employed a custom Infinium array (HorvathMammalMethylChip40) targeting conserved CpGs.
  • Developed three distinct epigenetic clocks for cats, including dual-species human-cat models.

Main Results:

  • Successfully created three epigenetic clocks for cats.
  • Demonstrated high age correlations in cats, cheetahs, tigers, and lions.
  • Validated dual-species clocks applicable to both cats and humans.

Conclusions:

  • Epigenetic clocks can be reliably developed for domestic cats.
  • These feline epigenetic clocks show cross-species applicability in felids.
  • The developed clocks hold promise for feline health monitoring and anti-aging interventions.