Related Experiment Video
Updated: Jun 6, 2026
09:26
Generation of Lymphocytic Microparticles and Detection of their Proapoptotic Effect on Airway Epithelial Cells
Published on: February 20, 2015
Cellular mechanisms underlying the formation of circulating microparticles
Olivier Morel1, Laurence Jesel, Jean-Marie Freyssinet
1Institut d'Hématologie & Immunologie, Université de Strasbourg, Strasbourg, France.
Arteriosclerosis, Thrombosis, and Vascular Biology
|December 17, 2010
Summary
Circulating microparticles (MPs), elevated in cardiovascular disease, are shed via phosphatidylserine (PS) exposure. Understanding cellular mechanisms of PS exposure and MP release is key for therapeutic strategies.
Area of Science:
- Biochemistry
- Cell Biology
- Cardiovascular Research
Background:
- Microparticles (MPs) from various blood cells are present at low levels in healthy individuals.
- Elevated MP levels are observed in atherothrombotic cardiovascular diseases.
- Understanding MP generation mechanisms is vital for disease comprehension.
Purpose of the Study:
- To elucidate cellular mechanisms of circulating microparticle generation.
- To explore the role of phosphatidylserine (PS) exposure in MP shedding.
- To investigate potential therapeutic targets for MP modulation.
Main Methods:
- Review of research on PS exposure mechanisms (calcium-, mitochondrial-, caspase-dependent).
- Analysis of molecular mechanisms in Scott cells influencing PS exposure and MP release.
- Discussion of pharmacological modulation of MP release.
Main Results:
- Phosphatidylserine (PS) externalization is a critical event preceding MP shedding.
- Specific cellular mechanisms (calcium, mitochondria, caspases) regulate PS exposure.
- Scott cell studies reveal diverse molecular pathways for MP release.
Conclusions:
- Targeting MP release offers therapeutic potential for atherothrombotic disorders.
- Careful drug targeting is essential to manage MP release effectively and avoid adverse effects.
- Further research into MP generation mechanisms can improve cardiovascular disease management.
Related Concept Videos
01:18Structure and Function of Platelets
The cell fragments known as platelets are disc-shaped, with an average diameter of about 3 μm and a thickness of roughly 1 μm. They play a crucial role in the body's vascular clotting system, which also involves plasma proteins, blood cells, and blood vessel tissues.
Platelets are continually replenished, circulating in the bloodstream for 9-12 days before being removed by phagocytes, primarily in the spleen. A microliter of circulating blood contains between 150,000 and 450,000 platelets, with...
Platelets are continually replenished, circulating in the bloodstream for 9-12 days before being removed by phagocytes, primarily in the spleen. A microliter of circulating blood contains between 150,000 and 450,000 platelets, with...
01:30Micelles
Micelle formation is an intricate process that hinges on the properties of amphiphilic or amphipathic molecules and the conditions of the system in which they are found. Amphiphilic molecules, which have both hydrophilic (water-attracting) and hydrophobic (water-repelling) parts, play a critical role in this process.In aqueous environments, these molecules arrange themselves such that their hydrophilic heads are turned towards the water phase, while their hydrophobic tails are oriented away...
00:59Mechanisms of Membrane Domain Formation
Different physical properties of lipids and proteins allow them to localize and form distinct islands or domains in the membrane. Some membrane domains are formed due to protein-protein interactions, whereas others are formed due to the presence of specific lipids such as sphingolipids and sterols—for example, large proteins, such as bacteriorhodopsin, aggregate and create distinct domains.
Another mechanism for membrane domain formation involves membrane proteins interacting with cytoskeletal...
Another mechanism for membrane domain formation involves membrane proteins interacting with cytoskeletal...