Cryopreservation of single-donor platelets with a reduced dimethyl sulfoxide concentration by the addition of second-messenger effectors: enhanced retention of in vitro functional activity

Transfusion
L CurrieJ Connor

Abstract

The potential for bacterial contamination limits the storage of platelets at 22 degrees C to 5 days. This creates an inventory problem, which could be overcome by the use of cryopreservation to allow long-term storage of platelets. It has been demonstrated that the addition to platelets of a mixture of second-messenger effectors (platelet storage solution), allows these cells to retain significant in vitro functional activity following cold storage. Analysis is needed of the ability of this second messenger effector mixture both to protect platelets during cryopreservation and to reduce the need for a cryoprotectant. Fresh single-donor platelet units (n = 8) were divided into three samples and treated with 6-percent dimethyl sulfoxide (DMSO), 2-percent DMSO or the platelet storage solution and 2-percent DMSO. The samples were placed directly into a -80 degrees C freezer and stored for 1 week, after which they were thawed and analyzed for in vitro functional activity. Platelets cryopreserved with the platelet storage solution and 2-percent DMSO displayed statistically higher retention of functional activity and viability--including cell number, percent of discoid cells, extent of shape change, and hypotonic shock response--than ...Continue Reading

Citations

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