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Comprehensive Analysis of Procoagulant Platelets Exhibiting Features of Necrosis, Apoptosis and Platelet Activation

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Coated-platelet levels are elevated in patients with transient ischemic attack.

Calin I Prodan¹, Andrea S Vincent, George L Dale

¹Department of Neurology Service, Veterans Administration Medical Center, Oklahoma City, Oklahoma City, OK, USA. calin-prodan@ouhsc.edu

Translational Research : the Journal of Laboratory and Clinical Medicine

|June 29, 2011

Summary

Patients experiencing transient ischemic attacks (TIAs) have higher levels of coated-platelets, a marker linked to stroke risk. This finding suggests TIAs and ischemic strokes share underlying prothrombotic mechanisms.

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Area of Science:

Neurology
Hematology
Cardiovascular Medicine

Background:

Transient ischemic attack (TIA) poses a significant risk for subsequent ischemic strokes, creating a clinical management challenge.
The ABCD2 score is a tool used to assess short-term stroke risk in TIA patients.
Coated-platelets, a specific type of procoagulant platelet, are implicated in ischemic stroke and intracerebral hemorrhage.

Purpose of the Study:

To investigate whether coated-platelet production is elevated in patients with TIA compared to healthy controls.
To explore the relationship between coated-platelet levels and the ABCD2 score in TIA patients.

Main Methods:

A pilot study involving 60 TIA patients and 60 controls.
Measurement of coated-platelet levels in both groups.
Correlation analysis between coated-platelet levels and ABCD2 scores in TIA patients.

Main Results:

Coated-platelet levels were significantly higher in TIA patients (38.4 ± 15.1%) compared to controls (31.0 ± 13.2%), with P = 0.005.
A significant positive linear correlation was found between ABCD2 scores and coated-platelet levels in TIA patients (P = 0.0003, r = 0.45).

Conclusions:

Elevated coated-platelet levels in TIA patients support the hypothesis that TIA and ischemic stroke are part of a disease spectrum.
These findings suggest shared prothrombotic processes underlie both TIA and ischemic stroke.