Abstract:
: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.
journal_name
Cancer Celljournal_title
Cancer cellauthors
Post SM,Quintás-Cardama A,Pant V,Iwakuma T,Hamir A,Jackson JG,Maccio DR,Bond GL,Johnson DG,Levine AJ,Lozano Gdoi
10.1016/j.ccr.2010.07.010subject
Has Abstractpub_date
2010-09-14 00:00:00pages
220-30issue
3eissn
1535-6108issn
1878-3686pii
S1535-6108(10)00303-Xjournal_volume
18pub_type
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