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Dynamic analysis of platelet deposition to resolve platelet adhesion receptor activity in whole blood at arterial shear rate
journal contribution
posted on 2023-07-26, 13:48 authored by Nicholas Pugh, Dominique Bihan, David J. Perry, Richard W. FarndalePlatelet activation is traditionally quantified using turbidimetric aggregometry, which reflects integrin αIIbβ3 activity, an important determinant of platelet function during pathophysiological thrombus formation. However, aggregometry does not recreate the shear conditions prevailing during thrombosis in vivo. Here we describe novel whole-frame analysis of real-time video microscopy to quantify platelet adhesion receptor activity under shear in parallel-plate flow chambers. We demonstrate that the rate of change of surface coverage (designated Platelet Population Mobility, PM) quantifies platelet mobility. On collagen, PM falls exponentially to a low level, corresponding to firm platelet adhesion, while on other substrates, PM remains high. Different receptor-specific thrombogenic surfaces reveal that the PM time constant reflects real-time changes in integrins αIIbβ3 and α2β1 activity. This ensemble kinetic analysis has the potential to provide valuable diagnostic information about platelet thrombus formation with both academic and clinical applications.
History
Refereed
- Yes
Volume
26Issue number
3Page range
216-218Publication title
PlateletsISSN
1369-1635External DOI
Publisher
Taylor & FrancisLanguage
- other
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Legacy posted date
2016-06-13Legacy Faculty/School/Department
ARCHIVED Faculty of Science & Technology (until September 2018)Usage metrics
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