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Fluorescence spectroscopic analysis of circulating platelet activation during coronary angioplasty
Author(s) -
Christov Alexander,
Kostuk William J.,
Jablonsky George,
Lucas Alexandra
Publication year - 2001
Publication title -
lasers in surgery and medicine
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.888
H-Index - 112
eISSN - 1096-9101
pISSN - 0196-8092
DOI - 10.1002/lsm.1069
Subject(s) - platelet activation , platelet , thrombus , chemistry , biophysics , medicine , cardiology , biology
Background and Objective Platelet activation during percutaneous transluminal coronary angioplasty (PTCA) initiates thrombus formation and plaque regrowth at sites of arterial injury, limiting procedure efficacy. We have developed a simple assay for circulating platelet activation based on fluorescence analysis of membrane fluidity and intracellular calcium concentration and light scattering analysis of platelet aggregation. Study Design/Materials and Methods Platelet activation state was measured in 45 patients undergoing angioplasty, before and after treatment with platelet inhibitors. Results PTCA alone produced a decrease in pyrene dimer formation (P0.0083) and an increase in light scattering at 650 nm (P0.0128). Treatment with ADP and GPIIb/IIIa receptor antagonists reduced PTCA induced changes in pyrene dimer formation. An unexpected decrease in pyrene dimer formation (P0.05) was detected when the GPIIb/IIIa receptor antagonist was given together with an ADP receptor antagonist. Conclusions 1) Analysis of membrane fluidity provides a sensitive marker for platelet activation state. 2) Reduced membrane fluidity after combined platelet inhibitor treatments suggests reduced antiplatelet efficacy. Lasers Surg. Med. 39:414–426, 2001. © 2001 Wiley‐Liss, Inc.