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10.1016/j.ebiom.2021.103369

http://scihub22266oqcxt.onion/10.1016/j.ebiom.2021.103369
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33971404!8104913!33971404
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suck abstract from ncbi


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pmid33971404      EBioMedicine 2021 ; 67 (ä): 103369
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  • Circulating extracellular vesicles are endowed with enhanced procoagulant activity in SARS-CoV-2 infection #MMPMID33971404
  • Balbi C; Burrello J; Bolis S; Lazzarini E; Biemmi V; Pianezzi E; Burrello A; Caporali E; Grazioli LG; Martinetti G; Fusi-Schmidhauser T; Vassalli G; Melli G; Barile L
  • EBioMedicine 2021[May]; 67 (ä): 103369 PMID33971404show ga
  • BACKGROUND: Coronavirus-2 (SARS-CoV-2) infection causes an acute respiratory syndrome accompanied by multi-organ damage that implicates a prothrombotic state leading to widespread microvascular clots. The causes of such coagulation abnormalities are unknown. The receptor tissue factor, also known as CD142, is often associated with cell-released extracellular vesicles (EV). In this study, we aimed to characterize surface antigens profile of circulating EV in COVID-19 patients and their potential implication as procoagulant agents. METHODS: We analyzed serum-derived EV from 67 participants who underwent nasopharyngeal swabs molecular test for suspected SARS-CoV-2 infection (34 positives and 33 negatives) and from 16 healthy controls (HC), as referral. A sub-analysis was performed on subjects who developed pneumonia (n = 28). Serum-derived EV were characterized for their surface antigen profile and tested for their procoagulant activity. A validation experiment was performed pre-treating EV with anti-CD142 antibody or with recombinant FVIIa. Serum TNF-alpha levels were measured by ELISA. FINDINGS: Profiling of EV antigens revealed a surface marker signature that defines circulating EV in COVID-19. A combination of seven surface molecules (CD49e, CD209, CD86, CD133/1, CD69, CD142, and CD20) clustered COVID (+) versus COVID (-) patients and HC. CD142 showed the highest discriminating performance at both multivariate models and ROC curve analysis. Noteworthy, we found that CD142 exposed onto surface of EV was biologically active. CD142 activity was higher in COVID (+) patients and correlated with TNF-alpha serum levels. INTERPRETATION: In SARS-CoV-2 infection the systemic inflammatory response results in cell-release of substantial amounts of procoagulant EV that may act as clotting initiation agents, contributing to disease severity. FUNDING: Cardiocentro Ticino Institute, Ente ospedaliero Cantonale, Lugano-Switzerland.
  • |Adult[MESH]
  • |Aged[MESH]
  • |Aged, 80 and over[MESH]
  • |Antigens, Surface/analysis[MESH]
  • |Biomarkers/analysis[MESH]
  • |COVID-19/blood/*complications/immunology[MESH]
  • |Case-Control Studies[MESH]
  • |Diagnosis, Differential[MESH]
  • |Extracellular Vesicles/*immunology[MESH]
  • |Female[MESH]
  • |Humans[MESH]
  • |Male[MESH]
  • |Middle Aged[MESH]
  • |Nasopharynx/virology[MESH]
  • |SARS-CoV-2/isolation & purification[MESH]
  • |Switzerland[MESH]
  • |Thromboplastin/*metabolism[MESH]
  • |Thrombosis/*blood/etiology/immunology[MESH]


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