Related Experiment Video
Updated: May 18, 2026
04:56
Detection of Aggregation-Prone Behavior in Mutant P53 V157F Breast Cancer Cells Using Multipoint Thioflavin T Fluorescence
Published on: December 30, 2025
A spatial physiological model for p53 intracellular dynamics.
Luna Dimitrio1, Jean Clairambault, Roberto Natalini
1INRIA Paris-Rocquencourt & UPMC, 4 Place Jussieu, F-75005 Paris, France. luna.dimitrio@inria.fr
Journal of Theoretical Biology
|September 18, 2012
Summary
This study models protein p53 accumulation after DNA damage, revealing that cell nucleus-cytoplasm separation naturally creates oscillations. These dynamics are robust to cellular environment changes, offering insights into DNA damage response.
Area of Science:
- Cellular and Molecular Biology
- Biophysics
- Systems Biology
Background:
- Protein p53 is crucial for cellular response to DNA damage.
- Eukaryotic cells possess distinct nuclear and cytoplasmic compartments.
- Intracellular signaling pathway modeling requires consideration of spatial organization.
Purpose of the Study:
- To design and analyze a physiologically based model of p53 accumulation in the nucleus post-DNA damage.
- To demonstrate how spatial separation (nucleus vs. cytoplasm) can generate oscillatory p53 dynamics.
- To investigate the influence of cellular spatial features on p53 network response.
Main Methods:
- Development of a physiologically based model for p53 dynamics.
- Analysis of a simple reaction network incorporating nuclear and cytoplasmic compartments.
- Investigation of spatial constraints, including diffusion coefficients and cellular geometry.
Main Results:
- The nucleus-cytoplasm distinction inherently produces oscillatory p53 dynamics without positive feedbacks or delays.
- Oscillations are contingent upon specific spatial constraints, such as biologically relevant diffusion coefficients.
- The p53 network exhibits robust oscillatory behavior in response to DNA damage across varied cellular environments (shape, volume, ribosomal distribution).
Conclusions:
- Cellular compartmentalization is a key factor in generating p53 oscillations.
- The spatial features of a cell significantly influence the dynamic response to DNA damage.
- Sustained p53 oscillations are a robust cellular response to DNA damage, irrespective of environmental variations.
Related Concept Videos
02:23Abnormal 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...
01:19Interactions 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...
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...
01:23Negative 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.
02:04Covalently Linked Protein Regulators
Proteins can undergo many types of post-translational modifications, often in response to changes in their environment. These modifications play an important role in the function and stability of these proteins. Covalently linked molecules include functional groups, such as methyl, acetyl, and phosphate groups, and also small proteins, such as ubiquitin. There are around 200 different types of covalent regulators that have been identified.
These groups modify specific amino acids in a protein.
These groups modify specific amino acids in a protein.
02:36DNA 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...
02:36DNA 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...