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Microparticles: biomarkers and beyond
Dylan Burger1, Sarah Schock, Charlie S Thompson
1Kidney Research Centre, Ottawa Hospital Research Institute, University of Ottawa, Ottawa, Canada. dburger@uottawa.ca
Abstract:
Membrane microparticles are submicron fragments of membrane shed into extracellular space from cells under conditions of stress/injury. They may be distinguished from other classes of extracellular vesicles (i.e. exosomes) on the basis of size, content and mechanism of formation. Microparticles are found in plasma and other biological fluids from healthy individuals and their levels are altered in various diseases, including diabetes, chronic kidney disease, pre-eclampsia and hypertension among others. Accordingly, they have been considered biomarkers of vascular injury and pro-thrombotic or pro-inflammatory conditions. In addition to this, emerging evidence suggests that microparticles are not simply a consequence of disease, but that they themselves may contribute to pathological processes. Thus microparticles appear to serve as both markers and mediators of pathology. The present review examines the evidence for microparticles as both biomarkers of, and contributors to, the progression of disease. Approaches for the detection of microparticles are summarized and novel concepts relating to the formation of microparticles and their biological effects are examined.
Insights
Membrane microparticles, shed from stressed cells, act as biomarkers and mediators in diseases like diabetes and hypertension. This review explores their role in pathology and detection methods.
Area of Science:
- Cellular Biology
- Biochemistry
- Pathology
Background:
- Membrane microparticles are extracellular vesicles released from stressed or injured cells.
- Distinct from exosomes, microparticles vary in size, content, and formation.
- Elevated microparticle levels are observed in various diseases, including diabetes and hypertension.
Purpose of the Study:
- To review evidence of microparticles as biomarkers and mediators of disease progression.
- To examine novel concepts in microparticle formation and biological effects.
- To summarize current approaches for microparticle detection.
Main Methods:
- Literature review of studies on microparticles in health and disease.
- Analysis of research on microparticle formation and biological functions.
- Summary of detection methodologies for microparticles.
Main Results:
- Microparticles are found in healthy individuals and altered in disease states.
- They are implicated as biomarkers for vascular injury and pro-thrombotic/inflammatory conditions.
- Emerging evidence suggests microparticles actively contribute to pathological processes.
Conclusions:
- Microparticles serve dual roles as both markers and mediators of disease.
- Understanding microparticles is crucial for diagnosing and potentially treating various pathologies.
- Further research into their formation and effects can reveal new therapeutic targets.
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