The frequency of myocardial infarction and sudden cardiac death has been shown to be higher in the hours from 6 a.m. to noon. Circadian variation in platelet aggregation has been hypothesized to contribute to this observation. We have developed a novel method of characterizing specific components of platelet activation in whole blood samples. Using flow cytometry to measure P-selectin expression on the surface of platelets, and fibrinogen binding we can look more specifically at platelet activation, as opposed to the measurement of platelet aggregation, that characterizes the summary of all components. This study is designed to characterize variation in platelet activation over a twenty-four hour interval.

Agency
National Institute of Health (NIH)
Institute
National Center for Research Resources (NCRR)
Type
General Clinical Research Centers Program (M01)
Project #
5M01RR000109-36
Application #
6408503
Study Section
Special Emphasis Panel (ZRR1)
Project Start
1977-12-01
Project End
2001-02-28
Budget Start
Budget End
Support Year
36
Fiscal Year
2000
Total Cost
Indirect Cost
Name
University of Vermont & St Agric College
Department
Type
DUNS #
066811191
City
Burlington
State
VT
Country
United States
Zip Code
05405
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