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Abnormal Proliferation

Abnormal Proliferation

Under normal conditions, most adult cells remain in a non-proliferative state unless stimulated by internal or external factors to replace lost cells. Abnormal cell proliferation is a condition in which the cell's growth exceeds and is uncoordinated with normal cells. In such situations, cell division persists in the same excessive manner even after cessation of the stimuli, leading to persistent tumors. The tumor arises from the damaged cells that replicate to pass the damage to the daughter...

Interactions Between Signaling Pathways

Interactions Between Signaling Pathways

Signaling cascades usually lack linearity. Multiple pathways interact and regulate one another, allowing cells to integrate and respond to diverse environmental stimuli.
Convergence and divergence, and cross-talk between signaling pathways
Two distinct signaling pathways can converge on a single functional unit, which may either be a single protein or a complex of proteins. The response is either functionally distinct or synergistic between the two pathways but different from the response...

DNA Damage Can Stall the Cell Cycle

DNA Damage Can Stall the Cell Cycle

In response to DNA damage, cells can pause the cell cycle to assess and repair the breaks. However, the cell must check the DNA at certain critical stages during the cell cycle. If the cell cycle pauses before DNA replication, the cells will contain twice the amount of DNA. On the other hand, if cells arrest after DNA replication but before mitosis, they will contain four times the normal amount of DNA. With a host of specialized proteins at their disposal,cells must use the right protein at...

DNA Damage can Stall the Cell Cycle

DNA Damage can Stall the Cell Cycle

In response to DNA damage, cells can pause the cell cycle to assess and repair the breaks. However, the cell must check the DNA at certain critical stages during the cell cycle. If the cell cycle pauses before DNA replication, the cells will contain twice the amount of DNA. On the other hand, if cells arrest after DNA replication but before mitosis, they will contain four times the normal amount of DNA. With a host of specialized proteins at their disposal,cells must use the right protein at...

The Intrinsic Apoptotic Pathway

The Intrinsic Apoptotic Pathway

Internal cellular stress, such as cellular injury or hypoxia, triggers intrinsic apoptosis. The B-cell lymphoma 2 (Bcl-2) family of proteins are the primary regulators of the intrinsic apoptotic pathway. For example, during DNA damage, checkpoint proteins, such as Ataxia Telangiectasia Mutated (ATM protein) and Checkpoints Factor-2 (Chk2) proteins, are activated. These proteins phosphorylate p53 which further activates pro-apoptotic proteins, such as Bax, Bak, PUMA, and Noxa, and inhibits...

Negative Regulator Molecules

Negative Regulator Molecules

Positive regulators allow a cell to advance through cell cycle checkpoints. Negative regulators have an equally important role as they terminate a cell’s progression through the cell cycle—or pause it—until the cell meets specific criteria.

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Related Experiment Video

Updated: May 9, 2026

Yeast As a Chassis for Developing Functional Assays to Study Human P53

Yeast As a Chassis for Developing Functional Assays to Study Human P53

Published on: August 4, 2019

The MDM2-p53 pathway revisited.

Subhasree Nag¹, Jiangjiang Qin, Kalkunte S Srivenugopal

¹Department of Pharmaceutical Sciences, School of Pharmacy, Texas Tech University Health Sciences Center, Amarillo, TX 79106, USA;

Journal of Biomedical Research

|July 26, 2013

Summary

This summary is machine-generated.

The p53 tumor suppressor protein is crucial for preventing cancer. Inhibiting its interaction with MDM2 offers a cancer therapy strategy, but this interaction is complex and requires further study.

Keywords:

MDM2-p53 interaction cancer therapy oncogene tumor suppressor

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Last Updated: May 9, 2026

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Area of Science:

Oncology
Molecular Biology
Biochemistry

Background:

The p53 tumor suppressor is a critical regulator of cellular processes, including DNA repair, cell cycle control, and apoptosis.
p53 acts as a key defense against cancer, but its function is often compromised in tumors.
The interaction between p53 and the MDM2 oncoprotein negatively regulates p53 activity, a common event in cancer.

Purpose of the Study:

To review the complex regulatory network of the MDM2-p53 axis.
To provide a holistic understanding of the molecular interplay governing p53 function.
To identify opportunities for exploiting the MDM2-p53 pathway in anticancer therapies.

Main Methods:

Literature review of studies on p53, MDM2, and their regulatory mechanisms.
Analysis of the multifaceted network involving cellular proteins and epigenetic factors.
Synthesis of current knowledge on the MDM2-p53 interaction in cancer.

Main Results:

The MDM2-p53 interaction is regulated by numerous cellular proteins and epigenetic mechanisms.
Dysregulation of the MDM2-p53 axis, through TP53 mutation or MDM2 overexpression, contributes to cancer development.
Targeting the MDM2-p53 interaction is a promising therapeutic strategy.

Conclusions:

Understanding the complexity of the MDM2-p53 axis is essential for effective cancer treatment.
Further research into the regulatory network can reveal novel therapeutic targets.
Exploiting the MDM2-p53 pathway holds significant potential for developing new anticancer drugs.