Cited by 115Cancer-related Molecular PathwaysSarcoma Diagnosis and TreatmentChromatin Remodeling and Cancer

Comprehensive Mapping of p53 Pathway Alterations Reveals an Apparent Role for Both SNP309 and MDM2 Amplification in Sarcomagenesis

Ito, Moriko, Barys, Louise, O'Reilly, Terence, Young, Sophie, Gorbatcheva, Bella, Monahan, John, Zumstein-Mecker, Sabine, Choong, Peter F. +6 more·2011·Clinical Cancer Research

Published version of a preprint

Abstract

Purpose: Reactivation of p53 tumor suppressor activity in diseases such as soft-tissue sarcoma is considered an attractive means of targeted therapy. By systematically assessing alterations affecting the p53 pathway, we aimed to (a) classify sarcoma subtypes, (b) define a potential role in malignancy, and (c) identify potential patient biomarkers in this heterogeneous disease. Experimental Design: We have mapped mutational events in a panel of 192 benign or malignant bone and soft-tissue sarcomas. Analyses included TP53 and CDKN2A mutational and SNP status, MDM2 and MDM4 amplification and MDM2 SNP309 status. Results: We found an inverse relationship between MDM2 amplification and TP53 mutations, with a predominantly wild-type CDKN2A background. A high rate of point mutations in TP53 was observed uniquely in leiomyosarcoma, osteosarcoma, and MFH. Both MDM2 and MDM4 were also amplified in a subtype-specific manner, which was frequently seen as a coamplification event. We have also analyzed the risk allele frequencies for MDM2 SNP309, and show that the G allele was strongly associated with both liposarcomas and MDM2 amplification. Conclusions: Our data emphasize the critical role of p53 inactivation in sarcomagenesis, whereby different pathway alterations may be related to the heterogeneity of the disease. Moreover, we observed a strong association of malignancy with TP53 mutation, or MDM2 amplification and the presence of a G allele in SNP309, especially in lipoma versus liposarcoma. We propose, therefore, that MDM2 markers along with TP53 sequencing should be considered as patient biomarkers in clinical trials of sarcomas using MDM2 antagonists. Clin Cancer Res; 17(3); 416–26. ©2010 AACR.

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Crossref · 10.1158/1078-0432.ccr-10-2050

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  • Amplification of MDM genes or altered expression of MDM proteins is a feature of many tumours.

    “Amplification of MDM genes or altered expression of MDM proteins is a feature of many tumours3–10 (Table 1).”

    From MDM2, MDMX and p53 in oncogenesis and cancer therapy (2013) · cites this paper as [8]

  • MDM2 and MDMX are deregulated in many human cancers and act oncogenically mainly by inhibiting p53.

    “The MDM2 and MDMX (also known as HDMX and MDM4) proteins are deregulated in many human cancers and exert their oncogenic activity predominantly by inhibiting the p53 tumour suppressor.”

    From MDM2, MDMX and p53 in oncogenesis and cancer therapy (2013) · cites this paper as [8]

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Authors
Ito, M., Barys, L., O'Reilly, T., Young, S., Gorbatcheva, B., Monahan, J., Zumstein-Mecker, S., Choong, P. F., Dickinson, I., Crowe, P., Hemmings, C., Desai, J., Thomas, D. M., & Lisztwan, J.
Affiliations
  • Peter MacCallum Cancer Centre (AU)
  • Authors' Affiliations: 1Novartis Institutes for Biomedical Research, Oncology Research, Basel, Switzerland; 2Peter MacCallum Cancer Centre, Melbourne, Australia; 3Novartis Institutes for Biomedical Research, Oncology Translational Medicine, Cambridge, Massachusetts; 4Wesley Research Institute, Brisbane, Australia; 5Prince of Wales Hospital, Sydney, Australia; and 6Canberra Hospital, Canberra, Australia
Venue
Clinical Cancer Research
Published
2011-02-01
Volume
17
Issue
3
Pages
416-426
ISSN
  • 1078-0432 (ISSN-L)
  • 1557-3265
OpenAlex
W2056955003
Cited by
115
References
57
Citations by year
2026: 3 · 2025: 1 · 2024: 2 · 2023: 5 · 2022: 2 · 2021: 5 · 2020: 10 · 2019: 7 · 2018: 7 · 2017: 7 · 2016: 9 · 2015: 17 · 2014: 16 · 2013: 10 · 2012: 10
FWCI
3.80
Type
journal article
Language
en
Open access
closed
Locations
  • Clinical Cancer Research (publishedVersion)
  • PubMed (publishedVersion)
  • ANU Open Research (Australian National University) (submittedVersion)
Topics
  • Health Sciences › Medicine › Oncology › Cancer-related Molecular Pathways
  • Health Sciences › Medicine › Pulmonary and Respiratory Medicine › Sarcoma Diagnosis and Treatment
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Chromatin Remodeling and Cancer
Keywords
p53 pathway, sarcomagenesis, soft tissue sarcoma, MDM2 amplification, TP53 mutation, CDKN2A, MDM2 SNP309, liposarcoma, lipoma, leiomyosarcoma, osteosarcoma, sarcoma subtypes, MDM2 inhibitors, tumor suppressor inactivation
MeSH terms
Bone Neoplasms, Chromosome Mapping, Gene Amplification, Humans, Mutation, Sarcoma, Soft Tissue Neoplasms, Biomarkers, Tumor, Genes, p53, Gene Dosage, Polymorphism, Single Nucleotide, Proto-Oncogene Proteins c-mdm2

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