Extracellular Vesicles Analysis as Possible Signatures of Antiphospholipid Syndrome Clinical Features

Area of Science:

• Immunology
• Vascular Biology
• Autoimmune Diseases

Background:

• Antiphospholipid syndrome (APS) is an autoimmune disorder causing thrombosis and pregnancy issues.
• Platelet- and endothelial-derived extracellular vesicles (EVs) are implicated in APS pathophysiology.

Purpose of the Study:

• To investigate the role of endothelial- and platelet-derived EVs in APS.
• To correlate EV levels with clinical manifestations and disease progression in APS patients.

Main Methods:

• Flow cytometry was used to quantify endothelial and platelet EVs in 22 APS patients and 18 controls.
• Clinical data, including organ involvement and obstetric complications, were collected.

Main Results:

• Overall EVs were significantly higher in APS patients compared to controls.
• Increased EVs correlated with central nervous system, hematological, and obstetric complications.
• Obstetric complications were associated with elevated endothelial EVs and reduced resting endothelial cell-derived EVs.

Conclusions:

• Endothelial cells and platelets are actively involved in APS pathogenesis, reflected by EV levels.
• Extracellular vesicles show potential as biomarkers for predicting organ damage and disease progression in APS.