Platelet aggregation of migraineurs during and between attacks

Area of Science:

• Neurology
• Hematology
• Biochemistry

Background:

• Platelet aggregation plays a crucial role in hemostasis and thrombosis.
• Migraine, a complex neurological disorder, may involve vascular and platelet abnormalities.

Purpose of the Study:

• To investigate alterations in platelet aggregation in patients with common and classical migraine.
• To compare platelet aggregation responses to adenosine diphosphate (ADP), collagen, and platelet-activating factor (PAF) between migraineurs and healthy controls.

Main Methods:

• Platelet aggregation was measured in common migraine (migraine without aura) and classical migraine (migraine with aura) patients during and between attacks.
• Adenosine diphosphate (ADP), collagen, and platelet-activating factor (PAF) were used as agonists.
• EC50 values and correlation matrices were analyzed.

Main Results:

• Classical migraine patients showed higher EC50 for ADP and PAF, and lower EC50 for collagen during headache-free intervals compared to controls.
• Common migraine patients exhibited EC50 values similar to controls during symptom-free periods.
• During attacks, only the EC50 for ADP was significantly higher in migraine patients compared to controls.
• A U-shaped correlation was observed between ADP and collagen-induced aggregation in classical migraine patients, unlike the positive correlation in healthy subjects.

Conclusions:

• Platelet aggregation is altered in migraine patients, with distinct patterns observed in classical migraine.
• These findings suggest a potential role for platelet dysfunction and platelet-activating factor (PAF) in the pathogenesis of migraine.