Preparing your results

Forgot Password

If you have forgotten your password you can enter your email here and get a temporary password sent to your email.

Mutations in the WRN gene in mice accelerate mortality in a p53-null background.

Werner's syndrome (WS) is a human disease with manifestations resembling premature aging. The gene defective in WS, WRN, encodes a DNA helicase. Here, we describe the generation of mice bearing a mutation that eliminates expression of the C terminus of the helicase domain of the WRN protein. Mutant mice are born at the expected Mendelian frequency and do not show any overt histological signs of accelerated senescence. These mice are capable of living beyond 2 years of age. Cells from these animals do not show elevated susceptibility to the genotoxins camptothecin or 4-NQO. However, mutant fibroblasts senesce approximately one passage earlier than controls. Importantly, WRN(-/-);p53(-/-) mice show an increased mortality rate relative to WRN(+/-);p53(-/-) animals. We consider possible models for the synergy between p53 and WRN mutations for the determination of life span.

Pubmed ID: 10757812


  • Lombard DB
  • Beard C
  • Johnson B
  • Marciniak RA
  • Dausman J
  • Bronson R
  • Buhlmann JE
  • Lipman R
  • Curry R
  • Sharpe A
  • Jaenisch R
  • Guarente L


Molecular and cellular biology

Publication Data

May 15, 2000

Associated Grants


Mesh Terms

  • 4-Nitroquinoline-1-oxide
  • Animals
  • Blotting, Western
  • Camptothecin
  • Cell Aging
  • Cell Division
  • Cells, Cultured
  • Cloning, Molecular
  • DNA Helicases
  • Dose-Response Relationship, Drug
  • Embryo, Mammalian
  • Exodeoxyribonucleases
  • Fibroblasts
  • Gene Library
  • Life Expectancy
  • Mice
  • Mice, Knockout
  • Molecular Sequence Data
  • Mutation
  • Phenotype
  • Quinolones
  • RecQ Helicases
  • Spleen
  • Time Factors
  • Tissue Distribution
  • Tumor Suppressor Protein p53