Prostacyclin prolongs viability of washed human platelets

Area of Science:

• Hematology
• Biochemistry
• Cell Biology

Background:

• Stored human platelets are essential for transfusion but lose viability over time.
• Platelet activation and degradation markers like thromboxane B2 impact stored platelet function.
• Prostacyclin is known to inhibit platelet activation.

Purpose of the Study:

• To evaluate the functional viability of stored human platelets washed with and without prostacyclin over 96 hours.
• To assess the impact of prostacyclin on platelet count, aggregation, cyclic AMP levels, thromboxane B2 generation, and oleate liberation.

Main Methods:

• Human platelets were washed in media with or without prostacyclin.
• Platelet counts, aggregation responses, and cyclic AMP levels were monitored.
• Spontaneous generation of thromboxane B2 and oleate liberation from phosphatides were measured.

Main Results:

• Platelets without prostacyclin showed rapid declines in count and aggregation response.
• Substantial thromboxane B2 generation and rapid oleate liberation occurred in non-prostacyclin samples.
• Prostacyclin-treated platelets maintained aggregation, had minimal thromboxane B2 generation, and showed slower decreases in count and oleate liberation.

Conclusions:

• Prostacyclin significantly enhances the functional viability of stored human platelets.
• The addition of prostacyclin during washing preserves platelet aggregation and reduces detrimental activation markers.
• Prostacyclin is a key component for improving platelet storage and maintaining their therapeutic efficacy.