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Comparison and stability of ADAMTS13 activity in therapeutic plasma products
Author(s) -
Scott Erik A.,
Puca Kathleen E.,
Pietz Bradley C.,
DuChateau Brian K.,
Friedman Kenneth D.
Publication year - 2007
Publication title -
transfusion
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.045
H-Index - 132
eISSN - 1537-2995
pISSN - 0041-1132
DOI - 10.1111/j.1537-2995.2007.01074.x
Subject(s) - cryoprecipitate , adamts13 , fresh frozen plasma , chemistry , blood product , thrombotic thrombocytopenic purpura , von willebrand factor , blood preservation , fibrinogen , food science , andrology , medicine , surgery , platelet , biochemistry
BACKGROUND: The von Willebrand factor (VWF)‐cleaving protease, ADAMTS13, is often deficient in cases of thrombotic thrombocytopenic purpura (TTP). The primary treatment of TTP is therapeutic plasma exchange (TPE) utilizing a variety of plasma products that help restore ADAMTS13 activity. However, multiple replacement products are available to choose from. Thawed plasma products have a variable refrigerated shelf life depending on the product type; stability of ADAMTS13 in thawed products stored at 1 to 6°C has not been determined. STUDY DESIGN AND METHODS: ADAMTS13 activity was measured in three types of plasma products and cryoprecipitate. Fresh‐frozen plasma (FFP) aliquots and cryoprecipitate‐poor plasma (CPP) products were produced from 10 whole‐blood (WB) donations. Twenty‐four‐hour plasma products were manufactured from 10 additional WB donations. ADAMTS13 activity in these products at time of thaw and after 5 days of storage at 1 to 6°C was measured with a modified version of the FRETS‐VWF73 fluorogenic assay. ADAMTS13 activity at time of thaw was measured in 10 units of cryoprecipitate and five related CPP products. RESULTS: ADAMTS13 is present in similar amounts in FFP, CPP, and 24‐hour plasma products. Storage at 1 to 6°C for up to 5 days did not significantly diminish ADAMTS13 activity. The concentration of ADAMTS13 in cryoprecipitate was significantly higher than that observed in plasma products. CONCLUSION: FFP, CPP, and 24‐hour plasma products should be equally effective for ADAMTS13 restoration through TPE and should remain so for the duration of the shelf life of the thawed products.