Related Experiment Video
Updated: Aug 31, 2025
10:55
Purification of Ubiquitinated p53 Proteins from Mammalian Cells
Published on: March 21, 2022
2.3K
P53 in endothelial function and unfolded protein response regulation
Khadeja-Tul Kubra1, Nektarios Barabutis1
1School of Basic Pharmaceutical and Toxicological Sciences, College of Pharmacy, University of Louisiana Monroe, Monroe, Louisiana, USA.
Cell Biology International
|August 23, 2022
Summary
This study investigates how P53 and stress responses affect vascular barrier function, crucial for treating acute respiratory distress syndrome (ARDS). Findings offer insights into endothelial permeability regulation for ARDS countermeasures.
Area of Science:
- Physiology
- Pathophysiology
- Molecular Biology
Background:
- Endothelial hyperpermeability contributes to sepsis and acute respiratory distress syndrome (ARDS).
- ARDS mortality has risen, particularly during the COVID-19 pandemic.
- Understanding endothelial barrier regulation is vital for developing ARDS treatments.
Purpose of the Study:
- To explore the role of P53 and stress responses in regulating endothelial permeability.
- To identify potential therapeutic targets for ARDS.
- To inform the scientific and medical community on barrier function mechanisms.
Main Methods:
- Investigated mechanisms of endothelial permeability regulation.
- Focused on the involvement of P53 and stress responses.
- Analyzed data relevant to ARDS pathophysiology.
Main Results:
- Established a link between P53, stress responses, and endothelial barrier function.
- Provided insights into the molecular mechanisms of vascular permeability.
- Highlighted the significance of these factors in ARDS.
Conclusions:
- P53 and stress responses are key regulators of endothelial barrier integrity.
- Findings contribute to the development of novel ARDS countermeasures.
- Further research into P53 pathways may yield targeted therapies for ARDS.
Related Concept Videos
01:37The Unfolded Protein Response
5.0K
The ER is the hub of protein synthesis in a cell. It has robust systems to quality control protein folding and also for degradation of terminally misfolded proteins. Under normal conditions, a small proportion of misfolded proteins that cannot be salvaged need to be transported to the cytoplasm by the ER-associated degradation or ERAD pathways. However, if the ERAD cannot handle the misfolded proteins, the cell activates the unfolded protein response or UPR to adjust the protein folding...
5.0K
01:31Regulation of the Unfolded Protein Response
2.6K
Inositol-requiring kinase one or IRE1 is the most conserved eukaryotic unfolded protein response (UPR) receptor. It is a type I transmembrane protein kinase receptor with a distinctive site-specific RNase activity. As the binding mechanics of the misfolded proteins with the N-terminal domain of IRE-1 are unclear, three binding models — direct, indirect, and allosteric -- are proposed for receptor activation. Nevertheless, it is known that once a misfolded protein associates with IRE1, it...
2.6K
02:23Abnormal Proliferation
4.6K
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...
4.6K
01:24Regulation of Angiogenesis and Blood Supply
2.7K
Rapidly dividing tumors, embryos, and wounded tissues require more oxygen than usual, lowering the oxygen concentration in the blood. At low oxygen or hypoxic conditions, an oxygen-sensitive transcription factor called the hypoxia-inducible factor 1 or HIF1 is activated. HIF1 is a dimeric protein of alpha (ɑ) and beta (β) subunits. Under optimal oxygen conditions, HIF1β is present in the nucleus while HIF1ɑ remains in the cytosol. HIF1ɑ is hydroxylated by prolyl...
2.7K
02:37DNA Damage can Stall the Cell Cycle
9.3K
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...
9.3K
01:23Negative Regulator Molecules
35.8K
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.
35.8K