Doumont, G. et al. (2005) G1 checkpoint failure and increased tumor susceptibility in mice lacking the novel p53 target Ptprv. EMBO Journal, 24(17), pp. 3093-3103. (doi: 10.1038/sj.emboj.7600769)
Full text not currently available from Enlighten.
Abstract
In response to DNA damage, p53 activates a G1 cell cycle checkpoint, in part through induction of the cyclin-dependent kinase inhibitor p21(Waf1/Cip1). Here we report the identification of a new direct p53 target, Ptprv (or ESP), encoding a transmembrane tyrosine phosphatase. Ptprv transcription is dramatically and preferentially increased in cultured cells undergoing p53-dependent cell cycle arrest, but not in cells undergoing p53-mediated apoptosis. This observation was further confirmed in vivo using a Ptprv null-reporter mouse line. A p53-responsive element is present in the Ptprv promoter and p53 is recruited to this site in vivo. Importantly, while p53-dependent apoptosis is intact in mice lacking Ptprv, Ptprv-null fibroblasts and epithelial cells of the small intestine are defective in G1 checkpoint control. Thus, Ptprv is a new direct p53 target and a key mediator of p53-induced cell cycle arrest. Finally, Ptprv loss enhances the formation of epidermal papillomas after exposure to chemical carcinogens, suggesting that Ptprv acts to suppress tumor formation in vivo.
Item Type: | Articles |
---|---|
Status: | Published |
Refereed: | Yes |
Glasgow Author(s) Enlighten ID: | Marchesi, Dr Francesco |
Authors: | Doumont, G., Martoriati, A., Beekman, C., Bogaerts, S., Mee, P.J., Bureau, F., Colombo, E., Alcalay, M., Bellefroid, E., Marchesi, F., Scanziani, E., Pelicci, P.G., and Marine, J.-C. |
College/School: | College of Medical Veterinary and Life Sciences > School of Biodiversity, One Health & Veterinary Medicine |
Journal Name: | EMBO Journal |
ISSN: | 0261-4189 |
ISSN (Online): | 1460-2075 |
University Staff: Request a correction | Enlighten Editors: Update this record