Related Experiment Video

Updated: May 17, 2026

Routine Screening Method for Microparticles in Platelet Transfusions
09:49

Routine Screening Method for Microparticles in Platelet Transfusions

Published on: January 31, 2018

Circulating and platelet-derived microparticles in human blood enhance thrombosis on atherosclerotic plaques

Rosa Suades1, Teresa Padró, Gemma Vilahur

  • 1Cardiovascular Research Center, CSIC-ICCC, Barcelona, Spain.

Thrombosis and Haemostasis
|November 10, 2012
PubMed

Insights

Circulating microparticles (cMPs), particularly platelet-derived microparticles (pMPs), significantly increase blood clot formation on damaged arteries. This study demonstrates their functional role in atherothrombosis beyond being mere biomarkers.

Area of Science:

  • Cardiovascular Biology
  • Hemostasis and Thrombosis
  • Cellular Biology

Background:

  • Acute coronary syndromes often result from plaque rupture and subsequent thrombosis.
  • Circulating microparticles (cMPs), released from activated cells, are linked to vascular diseases, with elevated platelet-derived microparticles (pMPs) observed in coronary disease patients.
  • The functional contribution of microparticles to arterial thrombus formation on damaged vessel walls remains unclear.

Purpose of the Study:

  • To investigate the functional role of increased circulating microparticles (cMPs) and platelet-derived microparticles (pMPs) in blood thrombogenicity on arterial damage.
  • To determine if microparticles actively contribute to thrombus development in atherothrombotic conditions.

Main Methods:

  • Microparticles were isolated from healthy volunteers and characterized using flow cytometry.
  • Platelet deposition was assessed under controlled flow using damaged arterial walls (Badimon chamber) and collagen type-I (flat chamber).
  • Functional assays included PFA-100, light transmission aggregometry (LTA), and thromboelastography.

Main Results:

  • Enriched cMP and pMP blood significantly increased platelet deposition on damaged arteries (p<0.05).
  • pMPs enhanced platelet and fibrin deposition on atherosclerotic arteries and collagen surfaces (p<0.05).
  • pMP-enriched blood showed dose-dependent shortening of closure time (PFA-100, p<0.001), increased ADP-induced aggregation (LTA, p<0.05), and reduced clotting time (p<0.01).

Conclusions:

  • Elevated levels of circulating microparticles (cMPs) and platelet-derived microparticles (pMPs) enhance platelet deposition and thrombus formation, even under normal blood conditions.
  • This study provides the first evidence that blood microparticles possess functional pro-thrombotic effects in cardiovascular atherothrombotic disease, extending their role beyond biomarkers.

More Related Videos

Microfluidics in Assessing Platelet Function06:47

Microfluidics in Assessing Platelet Function

Published on: November 8, 2024

Ferric Chloride-induced Murine Thrombosis Models10:37

Ferric Chloride-induced Murine Thrombosis Models

Published on: September 5, 2016

Related Concept Videos

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...
Structure and Function of Platelets01:18

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...
Atherosclerosis I: Introduction01:30

Atherosclerosis I: Introduction

Atherosclerosis is a progressive disorder characterized by the buildup of plaques on the arterial inner wall, causing them to narrow and harden over time. These plaques comprise lipids, calcium, blood components, carbohydrates, and fibrous tissue. The process primarily affects the intima of large and medium-sized arteries, reducing blood flow in any artery.Etiology and risk factorsThe cause of atherosclerosis is multifactorial, involving a complex interplay among endothelial injury, lipid...
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.
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...
Coronary Artery Disease II: Pathophysiology01:26

Coronary Artery Disease II: Pathophysiology

Coronary Artery Disease (CAD) originates from a series of events that impair the function of coronary arteries, the blood vessels responsible for delivering oxygen-rich blood to the heart muscle. The pathophysiology of CAD is closely linked to atherosclerosis, a chronic inflammatory and lipid-driven condition affecting the vascular endothelium.1. Endothelial DamageThe process begins with damage to the vascular endothelium, which serves as a protective barrier between the blood and the vessel...