Characterization of a novel mouse platelet transfusion model

Area of Science:

• Hematology
• Transfusion Medicine
• Biomedical Engineering

Background:

• Platelet transfusions are increasingly vital in modern medicine.
• Current FDA criteria rely on in vitro measures, but in vivo function post-processing and storage remains unclear.
• A need exists for reliable in vivo models to assess platelet quality.

Purpose of the Study:

• To develop a novel mouse model for platelet transfusion.
• To adapt FDA criteria for assessing mouse platelet units.
• To evaluate the in vivo detectability and function of transfused fresh and stored platelets.

Main Methods:

• Prepared mouse platelet units using a modified platelet-rich plasma (PRP) protocol.
• Assessed characteristics including pH, cell counts, and in vitro activity (activation, aggregation).
• Determined post-transfusion recovery (PTR) and in vivo clot localization via tail transection assay.

Main Results:

• Platelet units met acceptable counts and sterility standards.
• Fresh and 1-day stored platelets exhibited adequate pH, activation, aggregation, and PTR.
• Transfused fresh and 1-day stored platelets were detected in vivo clots.
• 2-day stored platelets demonstrated clinically unacceptable quality.

Conclusions:

• Developed a mouse platelet transfusion model analogous to human units.
• Established a maximum storage duration of 1 day for optimal quality.
• The model serves as a tool to investigate processing and storage effects on in vivo platelet function.