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Increased brain serotonin synthesis in migraine.
D C Chugani1, K Niimura, S Chaturvedi
1Department of Pediatrics, Children's Hospital of Michigan, Detroit Medical Center, Wayne State University School of Medicine 48201, USA.
Neurology
|October 26, 1999
Summary
Migraine patients show higher brain serotonin synthesis than healthy individuals. This suggests serotonin plays a key role in migraine pathophysiology and may be a target for treatments like beta-adrenergic antagonists.
Area of Science:
- Neuroscience
- Biochemistry
Background:
- Migraine pathophysiology is not fully understood.
- Serotonin is implicated in migraine.
Purpose of the Study:
- Measure brain serotonin synthesis in migraine patients using PET and alpha-[11C]methyl-L-tryptophan.
- Investigate the role of serotonin in migraine.
Main Methods:
- Positron Emission Tomography (PET) with alpha-[11C]methyl-L-tryptophan tracer.
- Studied 11 women with migraine and 8 healthy women.
- Five migraine patients were studied before and after treatment with propranolol or nadolol.
Main Results:
- Migraine patients exhibited higher whole-brain serotonin synthesis capacity (K-complex) compared to controls (p = 0.016).
- No significant difference in K-complex was observed in migraine patients with aura.
- A trend towards increased K-complex was noted after beta-adrenergic antagonist treatment.
Conclusions:
- Increased brain serotonin synthesis capacity in migraine patients supports its role in the condition, particularly in those without aura.
- Beta-adrenergic antagonists used for migraine prophylaxis may exert their effects by regulating serotonin synthesis.