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p53-MDM2 Axis
- Molecular classification
- Regulatory Pathway, Protein-Protein Interaction
01
Overview
The p53-MDM2 axis is a critical regulatory pathway in cell biology, particularly in the context of tumor suppression and cancer development. It centers on the interaction between the tumor suppressor protein p53 and its primary negative regulator, MDM2. p53 is a transcription factor that responds to cellular stress by inducing cell cycle arrest, apoptosis, and DNA repair. MDM2 is an E3 ubiquitin ligase that binds to p53, inhibiting its transcriptional activity and promoting its degradation. The MDM2 gene is a direct transcriptional target of p53, forming an autoregulatory feedback loop. Dysregulation of this axis is a common event in cancer.
- Other names
- TP53-MDM2 interactionp53-MDM2 pathwayMDM2-p53 axis
02
Mechanism of action
Inhibition of MDM2-p53 interaction, leading to p53 stabilization and activation of its downstream targets.
03
Biological functions
Tumor suppressionCell cycle regulationApoptosisDNA repairImmune response regulationRegulation of gene expression
04
Disease associations
CancerAcute Myeloid Leukemia (AML)
05
Safety considerations
Potential for off-target effectsDevelopment of resistanceToxicities associated with p53 activation
06
Interacting drugs
MDM2 inhibitors
07
Biomarkers
p53 statusMDM2 expression levels
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