Abstract:
BACKGROUND:Clinical performance of human platelet (PLT) products processed or stored under novel conditions is difficult to predict based on in vitro studies alone. Recovery and survival of radiolabeled PLTs in human subjects are used as surrogate markers for PLT efficacy in development of new products. Such experiments pose some risk to the participants, can be a financial burden on the sponsor, and may stifle innovation and development of new PLT products. Animal models for in vivo recovery and survival of human PLTs are limited by rapid, immune-mediated clearance of human cells. The severe combined immunodeficient (SCID) mice allowed prolonged circulation of human PLTs and were used to detect differences in recovery and survival between chemically damaged, aged PLTs, or normal PLTs. STUDY DESIGN AND METHODS:Human PLTs were transfused into SCID and wild-type (WT) mice, and the recoveries and survival times were detected in mouse whole blood by flow cytometry with an anti-human CD41-fluorescein isothiocyanate monoclonal antibody. Recoveries of damaged PLTs were compared to normal PLTs. RESULTS:Recoveries were significantly shorter in WT than in SCID mice at 4 hours after transfusion (WT, 20.8 +/- 5.4%, n = 12; SCID, 63.8 +/- 8.4%, n = 10) and with a t((1/2)) estimate of 2 hours for WT and 7 hours for SCID mice. Human PLTs damaged either by chemical treatment or by improper storage exhibited decreased recoveries in SCID mice. CONCLUSION:The SCID mouse model can detect differences between damaged and control human PLTs and could be useful in evaluating novel PLT collection, processing, and storage technologies that may impact PLT quality.
journal_name
Transfusionjournal_title
Transfusionauthors
Piper JT,Gelderman MP,Vostal JGdoi
10.1111/j.1537-2995.2007.01295.xsubject
Has Abstractpub_date
2007-08-01 00:00:00pages
1540-9issue
8eissn
0041-1132issn
1537-2995pii
TRF01295journal_volume
47pub_type
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