Stress-specific response of the p53-Mdm2 feedback loop View Full Text


Ontology type: schema:ScholarlyArticle      Open Access: True


Article Info

DATE

2010-12

AUTHORS

Alexander Hunziker, Mogens H Jensen, Sandeep Krishna

ABSTRACT

BACKGROUND: The p53 signalling pathway has hundreds of inputs and outputs. It can trigger cellular senescence, cell-cycle arrest and apoptosis in response to diverse stress conditions, including DNA damage, hypoxia and nutrient deprivation. Signals from all these inputs are channeled through a single node, the transcription factor p53. Yet, the pathway is flexible enough to produce different downstream gene expression patterns in response to different stresses. RESULTS: We construct a mathematical model of the negative feedback loop involving p53 and its inhibitor, Mdm2, at the core of this pathway, and use it to examine the effect of different stresses that trigger p53. In response to DNA damage, hypoxia, etc., the model exhibits a wide variety of specific output behaviour - steady states with low or high levels of p53 and Mdm2, as well as spiky oscillations with low or high average p53 levels. CONCLUSIONS: We show that even a simple negative feedback loop is capable of exhibiting the kind of flexible stress-specific response observed in the p53 system. Further, our model provides a framework for predicting the differences in p53 response to different stresses and single nucleotide polymorphisms. More... »

PAGES

94

Identifiers

URI

http://scigraph.springernature.com/pub.10.1186/1752-0509-4-94

DOI

http://dx.doi.org/10.1186/1752-0509-4-94

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1007828155

PUBMED

https://www.ncbi.nlm.nih.gov/pubmed/20624280


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Turtle is a human-readable linked data format.

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This table displays all metadata directly associated to this object as RDF triples.

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