Department of Pediatrics
Antibodies, Monoclonal; Blood Platelets; *Blood Preservation; Centrifugation; Electrophoresis, Polyacrylamide Gel; Enzyme-Linked Immunosorbent Assay; Flow Cytometry; Humans; Platelet Aggregation Inhibitors; Platelet Count; *Platelet Glycoprotein GPIb-IX Complex; Platelet Membrane Glycoproteins; Time Factors
Hematology | Pediatrics
Platelet membrane glycoprotein (GP) Ib contains receptor for von Willebrand factor and thrombin. Its proteolytic fragment, glycocalicin, circulates in normal plasma. In this study, storage of platelet concentrates for 5 d resulted in a 221% increase in plasma glycocalicin (1.3 times the total amount of glycocalicin present on the surface of all platelets), an 8% overall increase in platelet surface GPIb, and the appearance of a surface GPIb-negative subpopulation of platelets. Total platelet GPIb content of fresh washed platelets, determined by gel electrophoresis and immunoassay of Triton X-100 lysates, averaged 159,740 molecules per platelet. There were 36,360 surface GPIb molecules per platelet, determined by immunoassay of the supernatant of fresh washed platelets whose surface GPIb had been completely plasmin-cleaved. In summary, these studies provide evidence for (a) a redistribution of GPIb molecules with platelet storage, and (b) a large intraplatelet pool of GPIb (approximately threefold larger than the platelet surface pool of GPIb).
DOI of Published Version
J Clin Invest. 1988 Jun;81(6):1734-40. Link to article on publisher's site
The Journal of clinical investigation
Michelson, Alan D.; Adelman, Burt; Barnard, Marc R.; Carroll, Eddie; and Handin, Robert I., "Platelet storage results in a redistribution of glycoprotein Ib molecules. Evidence for a large intraplatelet pool of glycoprotein Ib" (1988). Open Access Articles. 1011.