Age-related remodelling of oesophageal epithelia by mutated cancer drivers

Nature. 2019 Jan;565(7739):312-317. doi: 10.1038/s41586-018-0811-x. Epub 2019 Jan 2.


Clonal expansion in aged normal tissues has been implicated in the development of cancer. However, the chronology and risk dependence of the expansion are poorly understood. Here we intensively sequence 682 micro-scale oesophageal samples and show, in physiologically normal oesophageal epithelia, the progressive age-related expansion of clones that carry mutations in driver genes (predominantly NOTCH1), which is substantially accelerated by alcohol consumption and by smoking. Driver-mutated clones emerge multifocally from early childhood and increase their number and size with ageing, and ultimately replace almost the entire oesophageal epithelium in the extremely elderly. Compared with mutations in oesophageal cancer, there is a marked overrepresentation of NOTCH1 and PPM1D mutations in physiologically normal oesophageal epithelia; these mutations can be acquired before late adolescence (as early as early infancy) and significantly increase in number with heavy smoking and drinking. The remodelling of the oesophageal epithelium by driver-mutated clones is an inevitable consequence of normal ageing, which-depending on lifestyle risks-may affect cancer development.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adolescent
  • Adult
  • Aged
  • Aged, 80 and over
  • Aging / genetics*
  • Aging / pathology*
  • Alcohol Drinking / genetics
  • Biopsy
  • Cell Count
  • Cell Transformation, Neoplastic / genetics
  • Child
  • Child, Preschool
  • Clone Cells / metabolism
  • Clone Cells / pathology
  • DNA Copy Number Variations
  • Epithelium* / metabolism
  • Epithelium* / pathology
  • Esophageal Neoplasms / genetics*
  • Esophageal Neoplasms / pathology*
  • Evolution, Molecular
  • Female
  • Gene-Environment Interaction
  • Genome, Human / genetics
  • Humans
  • Infant
  • Life Style
  • Male
  • Middle Aged
  • Mutation Accumulation
  • Mutation*
  • Precancerous Conditions / genetics*
  • Protein Phosphatase 2C / genetics
  • Receptor, Notch1 / genetics
  • Risk Factors
  • Sequence Analysis, DNA
  • Single-Cell Analysis
  • Smoking / genetics
  • Young Adult


  • NOTCH1 protein, human
  • Receptor, Notch1
  • PPM1D protein, human
  • Protein Phosphatase 2C