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Updated: May 27, 2026
Routine Screening Method for Microparticles in Platelet Transfusions
Published on: January 31, 2018
Measurement of platelet microparticles
Jeffrey I Zwicker1, Romaric Lacroix, Françoise Dignat-George
1Division of Hemostasis and Thrombosis, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, USA. jzwicker@bidmc.harvard.edu
Abstract:
Platelet microparticles are submicron vesicles that can support thrombin generation on externalized negatively charged phospholipids. Increased numbers of circulating platelet microparticles have been investigated as the basis of hypercoagulability in a variety of prothrombotic conditions. Measurement of platelet microparticles is not standardized and a number of preanalytic considerations can influence accurate analysis. We describe methodology for light scatter-based flow cytometry as well as impedance-based flow cytometry for the enumeration and characterization of platelet microparticles.
Insights
Platelet microparticles, vesicles supporting thrombin generation, are linked to hypercoagulability. This study details flow cytometry methods for accurate platelet microparticle measurement, addressing standardization issues.
Area of Science:
- Hematology
- Vascular Biology
- Biomedical Engineering
Background:
- Platelet microparticles (PMPs) are submicron vesicles released from activated or apoptotic platelets.
- Elevated circulating PMP levels are associated with hypercoagulability and prothrombotic conditions.
- Accurate quantification of PMPs is crucial for understanding their role in disease, but measurement methods lack standardization.
Purpose of the Study:
- To describe and validate methodologies for the enumeration and characterization of platelet microparticles.
- To address the need for standardized preanalytic and analytic considerations in PMP measurement.
- To provide reliable flow cytometry techniques for PMP analysis.
Main Methods:
- Development and application of light scatter-based flow cytometry for PMP enumeration.
- Implementation of impedance-based flow cytometry for PMP characterization.
- Focus on preanalytic variables influencing PMP measurement accuracy.
Main Results:
- Established robust flow cytometry protocols for PMP quantification.
- Demonstrated the utility of both light scatter and impedance methods for PMP analysis.
- Highlighted critical preanalytic factors impacting PMP measurement.
Conclusions:
- Standardized flow cytometry methods enable accurate measurement of platelet microparticles.
- Reliable PMP quantification is essential for assessing hypercoagulability and thrombotic risk.
- The described methodologies offer a foundation for consistent PMP analysis in clinical and research settings.
