Cookies on this website

We use cookies to ensure that we give you the best experience on our website. If you click 'Accept all cookies' we'll assume that you are happy to receive all cookies and you won't see this message again. If you click 'Reject all non-essential cookies' only necessary cookies providing core functionality such as security, network management, and accessibility will be enabled. Click 'Find out more' for information on how to change your cookie settings.

MDM2, a negative regulator of p53, is elevated in many cancers that retain wild-type p53. A single nucleotide polymorphism (SNP) in the human MDM2 promoter increases the affinity of Sp1 resulting in elevated MDM2 levels. We generated mice carrying either the MDM2(SNP309T) or the MDM2(SNP309G) allele to address the impact of MDM2(SNP309G) on tumorigenesis. Mdm2(SNP309G/G) cells exhibit elevated Mdm2 levels, reduced p53 levels, and decreased apoptosis. Importantly, some Mdm2(SNP309G/G) mice succumbed to tumors before 1 year of age, suggesting that this allele increases tumor risk. Additionally, the Mdm2(SNP309G) allele potentiates the tumor phenotype and alters tumor spectrum in mice inheriting a p53 hot-spot mutation. These data provide causal evidence for increased cancer risk in carriers of the Mdm2(SNP309G) allele.

Original publication

DOI

10.1016/j.ccr.2010.07.010

Type

Journal article

Journal

Cancer Cell

Publication Date

14/09/2010

Volume

18

Pages

220 - 230

Keywords

Animals, Cell Line, Tumor, Cell Transformation, Neoplastic, Genes, p53, Genetic Predisposition to Disease, Humans, Mice, Neoplasms, Nuclear Proteins, Plicamycin, Polymorphism, Single Nucleotide, Promoter Regions, Genetic, Proto-Oncogene Proteins c-mdm2, RNA, Messenger, Signal Transduction, Sp1 Transcription Factor, Tumor Suppressor Protein p53