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Research Article Free access | 10.1172/JCI113513

Platelet storage results in a redistribution of glycoprotein Ib molecules. Evidence for a large intraplatelet pool of glycoprotein Ib.

A D Michelson, B Adelman, M R Barnard, E Carroll, and R I Handin

Department of Pediatrics, University of Massachusetts Medical School, Worcester 01655.

Find articles by Michelson, A. in: PubMed | Google Scholar

Department of Pediatrics, University of Massachusetts Medical School, Worcester 01655.

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Department of Pediatrics, University of Massachusetts Medical School, Worcester 01655.

Find articles by Barnard, M. in: PubMed | Google Scholar

Department of Pediatrics, University of Massachusetts Medical School, Worcester 01655.

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Department of Pediatrics, University of Massachusetts Medical School, Worcester 01655.

Find articles by Handin, R. in: PubMed | Google Scholar

Published June 1, 1988 - More info

Published in Volume 81, Issue 6 on June 1, 1988
J Clin Invest. 1988;81(6):1734–1740. https://doi.org/10.1172/JCI113513.
© 1988 The American Society for Clinical Investigation
Published June 1, 1988 - Version history
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Abstract

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).

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