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Issue title: 25th Anniversary Volume
Article type: Research Article
Authors: Giorgio, T.D.b | Hellums, J.D.a
Affiliations: [a] Biomedical Engineering Lab, Department of Chemical Engineering, Rice University, Houston, Texas, U.S.A. 77251 | [b] Department of Chemical Engineering, Vanderbilt University, Nashville, Tennessee, U.S.A. 37235
Note: [] Accepted by: Editor V.A. Parsegian
Abstract: A cone and plate viscometer was modified to permit the continuous study of platelet response during shear stress exposure times on the order of one second to 180 seconds. Platelets may be stimulated by uniform, controlled shear stress alone or with the addition of chemical platelet agonists. The time course of platelet aggregation is interpreted from alterations in the apparent optical density of the platelet suspension. The rate and extent of platelet dense granule release is estimated from the intensity of the luminescent reaction of platelet released ATP with firefly luciferase and luciferin. Intracellular calcium ion concentration is determined as a function of shear exposure time through the fluorescence intensity of indo-15−, a membrane-permeant pentacarboxylate calcium ion chelator.
Keywords: shear stress, platelet activation, luminescence, fluorescence, light transmittance
DOI: 10.3233/BIR-1988-25402
Journal: Biorheology, vol. 25, no. 4, pp. 605-624, 1988
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