Phenotypic characterization of acoustically enriched extracellular vesicles from pathogen-activated platelets.
Journal
Journal of innate immunity
ISSN: 1662-8128
Titre abrégé: J Innate Immun
Pays: Switzerland
ID NLM: 101469471
Informations de publication
Date de publication:
27 May 2023
27 May 2023
Historique:
received:
13
01
2023
accepted:
23
05
2023
medline:
29
5
2023
pubmed:
29
5
2023
entrez:
28
5
2023
Statut:
aheadofprint
Résumé
Extracellular vesicles (EVs) are derived from the membrane of platelets and released in the circulation upon activation or injury. Analogous to the parent cell, platelet derived EVs play an important role in hemostasis and immune responses by transfer of bioactive cargo from the parent cells. Platelet activation and release of EVs increases in several pathological inflammatory diseases, such as sepsis. We have previously reported that the M1 protein released from the bacterial pathogen Streptococcus pyogenes directly mediates platelet activation. In this study, EVs were isolated from these pathogen-activated platelets using acoustic trapping and their inflammation phenotype was characterized using quantitative mass spectrometry-based proteomics and cell-based models of inflammation. We determined that M1 protein mediated release of platelet derived EVs that contained the M1 protein. The isolated EVs derived from pathogen-activated platelets contained a similar protein cargo to those from physiologically activated platelets (thrombin), and included platelet membrane proteins, granule proteins and cytoskeletal proteins, coagulation factors and immune mediators. Immunomodulatory cargo, complement proteins and IgG3, were significantly enriched in EVs isolated from M1 protein-stimulated platelets. Acoustically enriched EVs were functionally intact and exhibited proinflammatory effects on addition to blood, including platelet-neutrophil complex formation, neutrophil activation, and cytokine release. Collectively, our findings reveal novel aspects of pathogen-mediated platelet activation during invasive streptococcal infection.
Identifiants
pubmed: 37245510
pii: 000531266
doi: 10.1159/000531266
pmc: PMC10620552
doi:
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Informations de copyright
The Author(s). Published by S. Karger AG, Basel.
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