Adenovirus type 3 induces platelet activation in vitro

Area of Science:

• Virology
• Hematology
• Immunology

Background:

• Adenovirus type 3 (HAdV3) is a common human pathogen.
• Platelet activation plays a crucial role in hemostasis and thrombosis.
• The interaction between viruses and platelets is not fully understood.

Purpose of the Study:

• To investigate the in vitro effects of HAdV3 on human platelet activation.
• To determine if HAdV3 influences platelet aggregation, count, fibrinogen levels, and surface marker expression.

Main Methods:

• Human platelet-rich plasma (PRP) and whole blood were incubated with HAdV3 at various concentrations.
• Platelet aggregation, platelet count, fibrinogen levels, and expression of CD41a and CD62P were measured.
• Incubation times varied to assess temporal effects.

Main Results:

• HAdV3 (10^9-10^11 vp/ml) enhanced adenosine diphosphate (ADP) or ristocetin-induced platelet aggregation.
• Platelet count remained unaltered, but fibrinogen levels decreased.
• Platelet activation markers CD41a and CD62P (P-selectin) rapidly appeared on platelet surfaces within 30 minutes of HAdV3 incubation.

Conclusions:

• HAdV3 induces platelet activation in vitro.
• This activation may contribute to a pre-thrombotic state in peripheral blood.
• Findings may inform strategies for preventing severe HAdV infections.