Related Experiment Video
Updated: Jun 19, 2026

09:38
A Microfluidic Flow Chamber Model for Platelet Transfusion and Hemostasis Measures Platelet Deposition and Fibrin Formation in Real-time
Published on: February 14, 2017
THE RELATION OF THE RETICULO-ENDOTHELIAL SYSTEM TO THE BLOOD PLATELET COUNT
1Pathological Laboratories of the Brownsville and East New York Hospital, Brooklyn.
The Journal of Experimental Medicine
|October 30, 2009
Summary
Blocking the reticulo-endothelial system significantly elevates platelet counts. However, this increase is transient, indicating complex regulation beyond simple phagocytosis for platelet destruction.
Area of Science:
- Hematology
- Immunology
- Cell Biology
Background:
- The reticulo-endothelial system plays a role in platelet homeostasis.
- Platelet destruction mechanisms are not fully understood.
Purpose of the Study:
- To investigate the effect of reticulo-endothelial system blockade on platelet counts.
- To explore the mechanisms regulating platelet numbers.
Main Methods:
- Induction of reticulo-endothelial system blockade in experimental models.
- Monitoring of platelet counts over time.
Main Results:
- Blockade of the reticulo-endothelial system led to a significant and rapid increase in platelet count.
- Platelet counts showed a sharp partial recoil followed by a gradual decrease despite continued blockade.
- Evidence suggests that phagocytosis by reticulo-endothelial system cells is not the sole pathway for platelet destruction.
Conclusions:
- Platelet count regulation is complex and involves multiple mechanisms.
- Reticulo-endothelial system blockade provides insights into platelet kinetics and destruction pathways.
More Related Videos
Related Concept Videos
Structure 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...
Formation of the Platelet Plug
The platelet phase, the second stage of hemostasis, commences around 15-20 seconds after an injury. It follows and overlaps with the vascular phase, during which blood vessels constrict to minimize blood loss.
As the injured blood vessel contracts, endothelial cells undergo contraction, revealing collagen fibers in the basement membrane and underlying connective tissue. Furthermore, the plasma membrane of endothelial cells becomes adhesive, preparing the site for platelet adhesion. Platelets...
As the injured blood vessel contracts, endothelial cells undergo contraction, revealing collagen fibers in the basement membrane and underlying connective tissue. Furthermore, the plasma membrane of endothelial cells becomes adhesive, preparing the site for platelet adhesion. Platelets...
Introduction to Hemostasis
Hemostasis is a complex physiological process that prevents excessive bleeding when a blood vessel is injured. It's crucial for maintaining the integrity of the circulatory system, as it ensures that our blood remains fluid while still within the vascular network and yet clots to prevent blood loss upon vessel injury.
The three phases of hemostasis involve many clotting factors present in plasma and several substances released by platelets and injured tissue cells. It is a fast, localized, and...
The three phases of hemostasis involve many clotting factors present in plasma and several substances released by platelets and injured tissue cells. It is a fast, localized, and...

