[Stability of glycosylated platelets under cold storage]

Area of Science:

• Biotechnology
• Hematology
• Biochemistry

Context:

• Platelet concentrates are crucial for transfusions but have limited shelf-life.
• Long-term storage, especially at room temperature, can compromise platelet function and viability.
• Investigating methods to improve platelet storage and function is essential for transfusion medicine.

Purpose:

• To evaluate the stability and in vitro function of glycosylated platelet concentrates after prolonged refrigeration (14 days).
• To compare the effects of glycan modification and different storage conditions (room temperature vs. 4°C) on platelet markers and function.
• To assess the impact of glycosylation on platelet aggregation, surface marker expression, and lectin binding.

Summary:

• Glycosylated platelet concentrates stored at 4°C demonstrated a 5-6 fold higher RCA I lectin binding rate compared to room temperature storage over 14 days.
• Platelet aggregation responsiveness was significantly better in glycosylated groups than room temperature groups, despite a general decrease during storage.
• While initial storage (5 days) showed no significant difference in CD62P, CD42b, and Annexin V binding compared to fresh platelets, prolonged storage (14 days) revealed increased CD62P and PS expression and decreased CD42b in modified groups.

Impact:

• Glycan modification proves stable for up to 14 days of refrigerated storage.
• Glycosylated platelets exhibit superior in vitro function retention compared to room temperature stored platelets.
• The study highlights potential in vitro activation of glycosylated platelets after 5 days of storage, indicating a need for further investigation into optimal storage durations.