Novel and unexpected clearance mechanisms for cold platelets.
Novel and unexpected clearance mechanisms for cold platelets.
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DOI:
10.1016/j.transci.2009.10.008
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发表时间:
2010-02
期刊:
影响因子:
--
通讯作者:
Hoffmeister KM
中科院分区:
文献类型:
--
作者:
Rumjantseva V;Hoffmeister KM
Storage at room temperature is limited to 5 days because of the risk of bacterial growth and loss of platelet functionality. Platelet refrigeration remains impossible, because once chilled, platelets are rapidly removed from circulation. Chilling platelets (<4 h) clusters glycoprotein (GP) Ibα receptors, and β2 integrins on hepatic macrophages recognize clustered βGlcNAc residues leading to rapid clearance of acutely chilled platelets. Prolonged refrigeration increases the exposure of galactose residues such that, unexpectedly, hepatocytes remove platelets using their asialoglycoprotein receptors. Here we review current knowledge of the mechanisms of platelet removal, the existing knowledge of refrigerated platelet function, and methods to preserve platelet concentrates long-term for transfusion.
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