Suppression of cortical spreading depression in migraine prophylaxis

被引：447

作者：

Ayata, C

Jin, HW

Kudo, C

Dalkara, T

Moskowitz, MA

机构：

[1] Harvard Univ, Massachusetts Gen Hosp, Sch Med, Dept Radiol,Stroke & Neurovasc Regulat Lab, Charlestown, MA 02129 USA

[2] Harvard Univ, Massachusetts Gen Hosp, Sch Med, Dept Neurol,Stroke Serv, Charlestown, MA 02129 USA

[3] Harvard Univ, Massachusetts Gen Hosp, Sch Med, Dept Neurol,Neurosci Intens Care Unit, Charlestown, MA 02129 USA

[4] Hacettepe Univ, Fac Med, Dept Neurol, TR-06100 Ankara, Turkey

来源：

ANNALS OF NEUROLOGY | 2006年 / 59卷 / 04期

关键词：

D O I：

10.1002/ana.20778

中图分类号：

R74 [神经病学与精神病学];

学科分类号：

摘要：

Objective: Topiramate, valproate, propranolol, amitriptyline, and methysergide have been widely prescribed for migraine prophylaxis, but their mechanism or site of action is uncertain. Cortical spreading depression (CSD) has been implicated in migraine and as a headache trigger and can be evoked in experimental animals by electrical or chemical stimulation. We hypothesized that migraine prophylactic agents suppress CSD as a common mechanism of action. Methods: Rats were treated either acutely or chronically over weeks and months, with one of the above migraine prophylactic drugs, vehicle, or D-propranolol, a clinically ineffective drug. The impact of treatment was determined on the frequency of evoked CSDs after topical potassium application or on the incremental cathodal stimulation threshold to evoke CSD. Results. Chronic daily administration of migraine prophylactic drugs dose-dependently suppressed CSD frequency by 40 to 80% and increased the cathodal stimulation threshold, whereas acute treatment was ineffective. Longer treatment durations produced stronger CSD suppression. Chronic D-propranolol treatment did not differ from saline control. Interpretation Our data suggest that CSD provides a common therapeutic target for widely prescribed migraine prophylactic drugs. Assessing CSD threshold may prove useful for developing new prophylactic drugs and improving upon existing ones.

引用

页码：652 / 661

页数：10

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