Cited by 595Cancer-related Molecular PathwaysOcular Oncology and TreatmentsRetinal Development and Disorders

Inactivation of the p53 pathway in retinoblastoma

Laurie, Nikia A., Donovan, Stacy L., Shih, Chie-Schin, Zhang, Jiakun, Mills, Nicholas, Fuller, Christine, Teunisse, Amina, Lam, Suzanne +12 more·2006·Nature

Abstract

Most human tumours have genetic mutations in their Rb and p53 pathways, but retinoblastoma is thought to be an exception. Studies suggest that retinoblastomas, which initiate with mutations in the gene retinoblastoma 1 (RB1), bypass the p53 pathway because they arise from intrinsically death-resistant cells during retinal development. In contrast to this prevailing theory, here we show that the tumour surveillance pathway mediated by Arf, MDM2, MDMX and p53 is activated after loss of RB1 during retinogenesis. RB1-deficient retinoblasts undergo p53-mediated apoptosis and exit the cell cycle. Subsequently, amplification of the MDMX gene and increased expression of MDMX protein are strongly selected for during tumour progression as a mechanism to suppress the p53 response in RB1-deficient retinal cells. Our data provide evidence that the p53 pathway is inactivated in retinoblastoma and that this cancer does not originate from intrinsically death-resistant cells as previously thought. In addition, they support the idea that MDMX is a specific chemotherapeutic target for treating retinoblastoma.

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Crossref · 10.1038/nature05194

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  • Elevated MDMX mRNA is detected in 65% of retinoblastomas, and the same percentage of cutaneous melanomas overexpress MDMX protein.

    “Elevated levels of levels of MDMX mRNA are detected in 65% of retinoblastomas and the same percentage of cutaneous melanomas overexpress MDMX protein.21,22”
  • Elevated Mdmx levels are observed in many tumors and during tumorigenesis.

    “elevated Mdmx levels are observed in many tumors.3,18–22”
  • Mutant Mdmx effectively inhibits DNA break repair in human retinal epithelial cells that retain p53 and Arf and frequently overexpress MDMX when transformed, as in retinoblastoma.

    “Furthermore, this mutant form of Mdmx effectively inhibited DNA break repair in human retinal epithelial cells, which retain p53 and Arf and frequently overexpress MDMX when transformed, as in retinoblastoma.22”
  • The MDM4 gene is amplified in 65% of human retinoblastoma.

    “Recent data indicate the MDM4 gene is amplified in 65% of human retinoblastoma, a tumor of the eye that often results from inherited mutations in the RB1 gene (MIM#614041) (Laurie, et al., 2006).”

    From The Mdm network and its regulation of p53 activities: a rheostat of cancer risk (2014) · cites this paper as Laurie, et al., 2006

  • About half of lung tumors carry TP53 mutations.

    “50% of lung tumors have TP53 mutations”

    From The Mdm network and its regulation of p53 activities: a rheostat of cancer risk (2014) · cites this paper as Laurie, et al., 2006

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Authors
Laurie, N. A., Donovan, S. L., Shih, C.-S., Zhang, J., Mills, N., Fuller, C., Teunisse, A., Lam, S., Ramos, Y., Mohan, A., Johnson, D., Wilson, M., Rodriguez-Galindo, C., Quarto, M., Francoz, S., Mendrysa, S. M., Kiplin Guy, R., Marine, J.-C., Jochemsen, A. G., & Dyer, M. A.
Affiliations
  • St. Jude Children's Research Hospital (US)
  • University of California, San Francisco (US)
  • Leiden University Medical Center (NL)
  • University of Tennessee Health Science Center (US)
  • IFOM (IT)
  • Vlaams Instituut voor Biotechnologie (BE)
  • Purdue University West Lafayette (US)
Corresponding author
Dyer, Michael A.
Venue
Nature
Published
2006-11
Volume
444
Issue
7115
Pages
61-66
ISSN
  • 0028-0836 (ISSN-L)
  • 1476-4687
OpenAlex
W2049133549
Cited by
595
References
36
Citations by year
2026: 5 · 2025: 12 · 2024: 17 · 2023: 14 · 2022: 23 · 2021: 19 · 2020: 21 · 2019: 11 · 2018: 16 · 2017: 27 · 2016: 36 · 2015: 34 · 2014: 42 · 2013: 36 · 2012: 49
FWCI
23.41
Type
journal article
Language
en
Open access
closed
Locations
  • Nature (publishedVersion)
  • PubMed (publishedVersion)
  • RePEc: Research Papers in Economics (submittedVersion)
  • Ghent University Academic Bibliography (Ghent University) (submittedVersion)
Topics
  • Health Sciences › Medicine › Oncology › Cancer-related Molecular Pathways
  • Health Sciences › Medicine › Ophthalmology › Ocular Oncology and Treatments
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Retinal Development and Disorders
Keywords
retinoblastoma, p53 pathway, RB1, MDMX, MDM2, ARF, retinal development, apoptosis, cell cycle exit, tumor surveillance, chemotherapeutic target
MeSH terms
Animals, Cell Division, DNA Damage, Gene Amplification, Humans, Imidazoles, Mice, Inbred C57BL, Nuclear Proteins, Piperazines, Proto-Oncogene Proteins, Retina, Retinoblastoma, Tumor Suppressor Protein p53, Retinoblastoma Protein, Cell Death, Rats, Sprague-Dawley, Cell Cycle Proteins, Tumor Suppressor Protein p14ARF, Mice, Rats

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