Related Experiment Video

Updated: Mar 10, 2026

Author Spotlight: A Novel Method for Comprehensive Cell Component Analysis of Cerebral Blood Clots
06:12

Author Spotlight: A Novel Method for Comprehensive Cell Component Analysis of Cerebral Blood Clots

Published on: July 21, 2023

1.1K

Microparticles and Fibrinolysis

Loris Vallier1, Sylvie Cointe1, Romaric Lacroix1

  • 1VRCM, UMR_S1076, UFR de Pharmacie, Aix-Marseille Université, INSERM, Marseille, France.

Seminars in Thrombosis and Hemostasis
|December 7, 2016
PubMed

Insights

Microparticles (MPs), small cell-derived vesicles, play a complex role in hemostasis. This review highlights their catalytic surface for plasmin generation, impacting fibrinolysis and potentially disease.

Area of Science:

  • Biochemistry
  • Cell Biology
  • Hematology

Background:

  • Microparticles (MPs) are submicronic vesicles released from cell membranes during activation or apoptosis.
  • MPs carry diverse molecules, influencing homeostasis and cellular function.
  • MPs are primarily known for procoagulant activity, but their role in fibrinolysis is increasingly recognized.

Purpose of the Study:

  • To review the heterogeneous catalytic surface of MPs for plasmin generation.
  • To explore the MP-dependent fibrinolytic system.
  • To discuss the pathological implications of MP-associated fibrinolysis, particularly in cancer.

Main Methods:

  • Literature review of studies on microparticle formation and function.
  • Analysis of MP-derived plasmin generation mechanisms.
  • Examination of MP-associated fibrinolytic activity in various biological contexts.

Main Results:

  • MPs offer a heterogeneous catalytic surface for plasmin generation, varying with cellular origin.
  • The MP-dependent fibrinolytic system exhibits unique features.
  • MP-associated fibrinolysis has significant implications in pathological conditions like cancer.

Conclusions:

  • The role of MPs in hemostasis is more complex than previously understood, involving both procoagulant and fibrinolytic activities.
  • Understanding MP-driven fibrinolysis is crucial for comprehending physiological and pathological processes.
  • Targeting MP-associated fibrinolysis may offer therapeutic strategies for diseases such as cancer.

More Related Videos

Experimental and Imaging Techniques for Examining Fibrin Clot Structures in Normal and Diseased States07:09

Experimental and Imaging Techniques for Examining Fibrin Clot Structures in Normal and Diseased States

Published on: April 1, 2015

12.1K
Author Spotlight: Advancing Thrombolytic Testing by Integrating Flow Dynamics in In Vitro Models06:16

Author Spotlight: Advancing Thrombolytic Testing by Integrating Flow Dynamics in In Vitro Models

Published on: April 19, 2024

2.0K

Related Concept Videos

Clot Retraction and Fibrinolysis01:16

Clot Retraction and Fibrinolysis

After a fibrin clot is formed, the next step is clot retraction, a vital process facilitated by platelet contractile proteins, such as actin and myosin. These proteins pull the fibrin strands closer together and condense the clot. This action reduces the size of the clot, creating a smaller, denser structure that effectively seals off the damaged vessel. Clot retraction consolidates the clot and helps with wound healing by bringing the edges of the damaged blood vessel closer together.
9.8K
Anticoagulant Drugs: Low-Molecular-Weight Heparins01:30

Anticoagulant Drugs: Low-Molecular-Weight Heparins

Hemostasis is a crucial process that prevents excessive blood loss from damaged blood vessels. It involves various mechanisms such as vasoconstriction, platelet adhesion and activation, and fibrin formation. The importance of each mechanism depends on the type of vessel injury. In contrast, thrombosis is the abnormal formation of a blood clot within the blood vessels, leading to potential complications if the clot obstructs blood flow. Thrombosis can be caused by increased coagulability of the...
2.2K
Extrinsic and Intrinsic Pathways of Hemostasis01:20

Extrinsic and Intrinsic Pathways of Hemostasis

Blood clotting or coagulation involves extrinsic and intrinsic pathways, which ultimately merge into the common pathway, forming a fibrin clot.
The Extrinsic Pathway
The extrinsic pathway of coagulation is typically initiated by tissue damage that exposes blood to tissue factor (TF), a protein released by the damaged tissue cells outside the blood vessels—this interaction with TF triggers biochemical reactions involving specific clotting factors. The key player here is Factor VII, which...
14.5K
Formation of the Platelet Plug01:22

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...
10.3K
Coagulation01:09

Coagulation

The coagulation phase is a critical part of the body's process to prevent blood loss following injury to blood vessels. It involves chemical reactions that form a clot to seal the injured area. The clotting process begins shortly after injury, within 15-20 seconds for severe damage and 1-2 minutes for minor injuries.
During the coagulation phase, clotting factors, or procoagulants, play a vital role in initiating and progressing the coagulation cascade. This cascade is a series of reactions...
11.5K
Introduction to Hemostasis01:05

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,...
15.7K