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Published on: September 26, 2025
Identification of new inhibitors of Mdm2-p53 interaction via pharmacophore and structure-based virtual screening
Noor Atatreh1, Mohammad A Ghattas1, Sanaa K Bardaweel2
1Department of Pharmaceutical Sciences, College of Pharmacy, Al Ain University of Science and Technology, Al Ain, Abu Dhabi, United Arab Emirates, mohammad.alsorkhy@aau.ac.ae; noor.atatreh@aau.ac.ae.
Background:
The tumor suppressor protein p53 plays an important role in preventing tumor formation and progression through its involvement in cell division control and initiation of apoptosis. Mdm2 protein controls the activity of p53 protein through working as ubiquitin E3 ligase promoting p53 degradation through the proteasome degradation pathway. Inhibitors for Mdm2-p53 interaction have restored the activity of p53 protein and induced cancer fighting properties in the cell.
Purpose:
The objective of this study is to use computer-aided drug discovery techniques to search for new Mdm2-p53 interaction inhibitors.
Methods:
A set of pharmacophoric features were created based on a standard Mdm2 inhibitor and this was used to screen a commercial drug-like ligand library; then potential inhibitors were docked and ranked in a multi-step protocol using GLIDE. Top ranked ligands from docking were evaluated for their inhibition activity of Mdm2-p53 interaction using ELISA testing.
Results:
Several compounds showed inhibition activity at the submicromolar level, which is comparable to the standard inhibitor Nutlin-3a. Furthermore, the discovered inhibitors were evaluated for their anticancer activities against different breast cancer cell lines, and they showed an interesting inhibition pattern.
Conclusion:
The reported inhibitors can represent a starting point for further SAR studies in the future and can help in the discovery of new anticancer agents.
Insights
Researchers used computational methods to discover new inhibitors of the Mdm2-p53 interaction, which could lead to novel cancer treatments by restoring tumor suppressor protein p53 activity.
Area of Science:
- Oncology
- Pharmacology
- Computational Chemistry
Background:
- The tumor suppressor protein p53 is crucial for preventing cancer by regulating cell division and apoptosis.
- Mdm2 protein inhibits p53 activity, promoting cancer progression.
- Inhibiting the Mdm2-p53 interaction can restore p53 function and anti-cancer properties.
Purpose of the Study:
- To identify novel inhibitors of the Mdm2-p53 interaction using computer-aided drug discovery.
- To explore new therapeutic strategies for cancer treatment by targeting the Mdm2-p53 pathway.
Main Methods:
- Utilized pharmacophore modeling based on a known Mdm2 inhibitor.
- Screened a drug-like ligand library and performed virtual screening using GLIDE docking.
- Validated top-ranked compounds through ELISA assays for Mdm2-p53 inhibition and assessed anti-cancer activity in breast cancer cell lines.
Main Results:
- Identified several compounds exhibiting submicromolar inhibition of Mdm2-p53 interaction, comparable to Nutlin-3a.
- Discovered potent inhibitors with significant anti-cancer activity against various breast cancer cell lines.
- Demonstrated the potential of computational approaches in discovering novel anti-cancer agents.
Conclusions:
- The identified inhibitors serve as promising leads for further structure-activity relationship (SAR) studies.
- These compounds represent a valuable starting point for developing new anti-cancer drugs targeting the Mdm2-p53 pathway.
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