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. 2014 Jan 24;9(1):e87243.
doi: 10.1371/journal.pone.0087243. eCollection 2014.

Plasma concentration of platelet-derived microparticles is related to painful vaso-occlusive phenotype severity in sickle cell anemia

Danitza Nebor  1 , Andre Bowers  2 , Philippe Connes  3 , Marie-Dominique Hardy-Dessources  4 , Jennifer Knight-Madden  5 , Vanessa Cumming  6 , Marvin Reid  5 , Marc Romana  4
Affiliations

Plasma concentration of platelet-derived microparticles is related to painful vaso-occlusive phenotype severity in sickle cell anemia

Danitza Nebor et al. PLoS One. .

Abstract

High plasma level of microparticles (MPs) deriving mainly from erythrocytes and platelets has been detected in sickle cell anemia (SCA) patients. Flow cytometry was used to determine the concentration of MPs in two groups of SCA patients exhibiting marked differences in painful vaso-occlusive crisis rates [a non-severe group (n = 17) and a severe group (n = 12)], and in a control group composed of healthy subjects (n = 20). A 3- to 4-fold increase of total MP plasma concentration was detected in SCA patients. Higher platelet-derived MPs concentration was detected in the severe SCA group while erythrocyte-derived MPs concentration was increased in the non-severe SCA patient group only. Our results suggest that plasma concentration of MPs shed by platelets is a biomarker of the vaso-occlusive phenotype-related severity.

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Conflict of interest statement

Competing Interests: The authors have declared that no competing interests exist.

Figures

Figure 1
Figure 1. Representative flow cytometry analysis for quantifying microparticles originated from red blood cells and platelets.
Figure 1A: Acquisition gate set up using the fluorescent microbeads size of the megamix kit according to the manufacturer instructions. Figure 1B: negative control using isotypic control-PE and annexin V-FITC in EDTA buffer. Figure 1C: double fluorescence plots demonstrating MPs originated from RBCs. Figure 1D. double fluorescence plots demonstrating MPs originated from platelets.
Figure 2
Figure 2. Comparison of MPs concentration between control group and SCA patients groups.
Figure 2A: Total MPs. Figure 2B: Platelet-derived MPs. Figure 2C: Erythrocyte-derived MPs.
See this image and copyright information in PMC

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