alexa Overexpression of Mdm2 in mice reveals a p53-independent role for Mdm2 in tumorigenesis.
Oncology

Oncology

Journal of Cancer Science & Therapy

Author(s): Jones SN, Hancock AR, Vogel H, Donehower LA, Bradley A

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Abstract The Mdm2 proto-oncogene is amplified to high copy numbers in human sarcomas and is overexpressed in a wide variety of other human cancers. Because Mdm2 protein forms a complex with the p53 tumor suppressor protein and down-regulates p53 function, the oncogenic potential of Mdm2 is presumed to be p53-dependent. To model these conditions in mice, we have used the entire Mdm2 gene, under transcriptional control of its native promoter region, as a transgene to create mice that overexpress Mdm2. The transgenic mice are predisposed to spontaneous tumor formation, and the incidence of sarcomas observed in the Mdm2-transgenic mice in the presence or absence of functional p53 demonstrates that, in addition to Mdm2-mediated inactivation of p53, there exists a p53-independent role for Mdm2 in tumorigenesis.
This article was published in Proc Natl Acad Sci U S A and referenced in Journal of Cancer Science & Therapy

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