Platelet Biochemistry and Morphology after Cryopreservation

Area of Science:

• Transfusion Medicine
• Hematology
• Cryobiology

Background:

• Platelet cryopreservation offers an alternative to room temperature storage, with dimethylsulfoxide enabling storage up to two years at -80°C.
• Cryopreserved platelets can address stock shortages and logistical challenges in remote or military settings.

Purpose of the Study:

• To review the effects of cryopreservation on platelet function and clinical efficacy.
• To highlight the procoagulant properties and transfusion challenges of cryopreserved platelets.

Main Methods:

• Literature review of studies on platelet cryopreservation.
• Analysis of platelet morphology, activation, aggregation, and in vivo recovery.
• Examination of procoagulant activity and GPIbα receptor expression.

Main Results:

• Cryopreservation alters platelet morphology, reduces activation and aggregation, but induces a procoagulant phenotype.
• Low post-transfusion recovery of cryopreserved platelets is linked to GPIbα receptor changes and subpopulation formation.
• Procoagulant properties suggest potential in trauma care, but clinical efficacy requires further study.

Conclusions:

• Cryopreservation impacts platelet function, creating a procoagulant state and affecting in vivo clearance.
• Further research, including double-blinded randomized trials in bleeding patients, is crucial to establish clinical utility, especially for trauma.
• Understanding GPIbα receptor dynamics is key to optimizing cryopreserved platelet use.