Genetic, parental and lifestyle factors influence telomere length

Commun Biol. 2022 Jun 9;5(1):565. doi: 10.1038/s42003-022-03521-7.

Abstract

The average length of telomere repeats (TL) declines with age and is considered to be a marker of biological ageing. Here, we measured TL in six blood cell types from 1046 individuals using the clinically validated Flow-FISH method. We identified remarkable cell-type-specific variations in TL. Host genetics, environmental, parental and intrinsic factors such as sex, parental age, and smoking are associated to variations in TL. By analysing the genome-wide methylation patterns, we identified that the association of maternal, but not paternal, age to TL is mediated by epigenetics. Single-cell RNA-sequencing data for 62 participants revealed differential gene expression in T-cells. Genes negatively associated with TL were enriched for pathways related to translation and nonsense-mediated decay. Altogether, this study addresses cell-type-specific differences in telomere biology and its relation to cell-type-specific gene expression and highlights how perinatal factors play a role in determining TL, on top of genetics and lifestyle.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Aging* / genetics
  • Epigenesis, Genetic
  • Female
  • Humans
  • Life Style
  • Parents
  • Pregnancy
  • Telomere* / genetics