Platelet Activation and Autoimmunity: Mechanisms Linking Hemostasis and Cardiovascular Risk in Rheumatologic Disease

Area of Science:

• Immunology
• Vascular Biology
• Rheumatology

Background:

• Platelets, known for blood clotting, are increasingly recognized for their role in immune responses.
• In immune-mediated inflammatory diseases (IMIDs), platelets contribute to chronic inflammation and vascular damage.
• Conditions like systemic lupus erythematosus (SLE), rheumatoid arthritis (RA), and psoriasis involve altered platelet activity.

Purpose of the Study:

• To explore the multifaceted role of platelets in immune-mediated inflammatory diseases.
• To understand how platelets mediate thromboinflammation and vascular pathology in IMIDs.
• To identify potential therapeutic targets for reducing cardiovascular risk in rheumatologic patients.

Main Methods:

• Review of current literature on platelet function in IMIDs.
• Analysis of molecular pathways involving platelet activation, leukocyte recruitment, and endothelial responses.
• Examination of evidence for therapeutic interventions and emerging technologies.

Main Results:

• Platelet activation, interferon signaling, and immune complex engagement amplify thromboinflammation in IMIDs.
• Platelets orchestrate leukocyte recruitment and endothelial activation via specific molecular interactions.
• Platelet pathways contribute to atherothrombosis (e.g., myocardial infarction, stroke) independent of traditional risk factors.
• Disease-specific platelet involvement observed in SLE, RA, and psoriasis.

Conclusions:

• Platelets act as key mediators linking autoimmunity and atherothrombosis.
• Targeting platelet-immune crosstalk offers potential for cardiovascular risk reduction in rheumatologic populations.
• Advances in multiomics and profiling technologies are crucial for identifying new therapeutic targets and biomarkers.