Analysis of Extracellular Vesicles Using Magnetic Nanoparticles in Blood of Patients with Acute Coronary Syndrome.
Extracellular vesicles (EVs) are released from various cell types and play an important role in intercellular interactions. In our study, we investigated abundance of individual EVs in patients with acute forms of ischemic heart disease. Previously, we developed an approach for individual analysis of EVs conjugated with magnetic nanoparticles (MNPs), which was applied in the current study for analyzing phenotypic composition of EVs (by staining for markers CD31, CD41a, and CD63). EVs were isolated using fluorescently labeled MNPs containing anti-CD31, CD41a, or CD63 antibodies and analyzed by combining fluorescently labeled anti-CD41a and CD63, CD31 and CD63, or CD41a and CD31 antibodies, respectively. EVs were analyzed in 30 individuals: 17 healthy volunteers and 13 patients with acute coronary syndrome (ACS). Six and seven ACS patients were with acute myocardial infarction and unstable angina, respectively. It was found that patients with ACS and healthy volunteers contained a dominant subset of EVs expressing surface CD41a antigen, suggesting that they originated from platelets. In addition, the total number of EVs isolated using either of the surface markers examined in our study was higher in patients with ACS compared to healthy volunteers. The subgroup of patients with acute myocardial infarction was found to contain significantly higher number of blood EVs compared to the control group. Moreover, increased number of EVs in patients with ACS is mainly due to the increased number of EVs in the subset of EVs bearing CD41a. By analyzing individual EVs, we found that plasma of patients with ACS, particularly upon developing of myocardial infarction, contained dominant platelet-derived EVs fraction, which may reflect activation of platelets in such patients.
Moscow State University of Medicine and Dentistry, Laboratory of Atherothrombosis, 109240 Moscow, Russia.
M S
MS
Vagida
Section on Intercellular Interactions, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, 20892, Bethesda, Maryland, USA.
A
A
Arakelyan
Moscow State University of Medicine and Dentistry, Laboratory of Atherothrombosis, 109240 Moscow, Russia.
A M
AM
Lebedeva
Section on Intercellular Interactions, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, 20892, Bethesda, Maryland, USA.
J-Ch
JC
Grivel
Moscow State University of Medicine and Dentistry, Laboratory of Atherothrombosis, 109240 Moscow, Russia.
A V
AV
Shpektor
Moscow State University of Medicine and Dentistry, Laboratory of Atherothrombosis, 109240 Moscow, Russia.
E Yu
EY
Vasilieva
Section on Intercellular Interactions, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, 20892, Bethesda, Maryland, USA.
L B
LB
Margolis
D054058:Acute Coronary Syndrome / Q000097:blood / Q000175:diagnosis*; D000368:Aged; D000906:Antibodies / Q000737:chemistry / Q000276:immunology; D001792:Blood Platelets / Q000378:metabolism; D016022:Case-Control Studies; D000067128:Extracellular Vesicles / Q000737:chemistry / Q000378:metabolism*; D005260:Female; D005434:Flow Cytometry; D015395:Histocompatibility Antigens Class I / Q000378:metabolism; D006801:Humans; D039421:Integrin alpha2 / Q000276:immunology / Q000378:metabolism; D058185:Magnetite Nanoparticles / Q000737:chemistry*; D008297:Male; D008875:Middle Aged; D019408:Platelet Endothelial Cell Adhesion Molecule-1 / Q000276:immunology / Q000378:metabolism
D000906:Antibodies; D015395:Histocompatibility Antigens Class I; C056564:ITGA2B protein, human; D039421:Integrin alpha2; D058185:Magnetite Nanoparticles; D019408:Platelet Endothelial Cell Adhesion Molecule-1