4. Conclusion
This overview describes the history of the origin of microparticles as a concept. The evolving knowledge about MP formation, characteristics, effects and factors which may affect formation and function of MP derived from normal and abnormal RBC is then described. Accumulated knowledge, where the RBC serves as the paradigm, shows that microparticle formation is a fundamental biologic process of cell aging, cell survival and cell clearance. Underlying disorders of Hb synthesis, RBC membranes or red cell enzymes, increase micro-vesiculation, thereby increasing procoagulant effects, and decreased NO bioavailability, which contribute to the clinical phenotype of each syndrome where microparticle formation is increased.