alexa Tumour selection advantage of non-dominant negative P53 mutations in homozygotic MDM2-SNP309 colorectal cancer cells
Oncology

Oncology

Journal of Carcinogenesis & Mutagenesis

Author(s): Alazzouzi H, Suriano G, Guerra A, Plaja A, Espn E

Abstract Share this page

BACKGROUND:

Mdm2 is a natural inhibitor of p53 function and its overexpression impairs p53 transcriptional activity. T-->G single-nucleotide polymorphism at position 309 (SNP309) of mdm2 induces overexpression of mdm2, but inhibits p53.

OBJECTIVES:

To determine whether SNP309 is a risk-modifier polymorphism in colorectal cancer (CRC) and whether tumour selection of P53 mutations are influenced by SNP309.

METHODS:

Single-stranded conformation polymorphism and automatic sequencing were performed.

RESULTS:

SNP309 is not associated with the risk of CRC or recurrence of tumours. These data do not over-ride the tumour-selection capabilities of P53 mutations in CRC. However, a significant association with non-dominant-negative P53 mutations (p = 0.02) was found.

CONCLUSIONS:

MDM2-SNP309 favours tumour selection of non-dominant negative P53 mutations in CRC, which also show an earlier age of tumour onset.

This article was published in J Med Genet and referenced in Journal of Carcinogenesis & Mutagenesis

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