Cortical spreading depression does not result in the release of calcitonin gene-related peptide into the external jugular vein of the cat: relevance to human migraine.
There is circumstantial evidence that cortical spreading depression (SD) may account for the scotoma and the "spreading cortical oligemia" seen during migraine with aura. It has been shown that calcitonin gene-related peptide (CGRP) is increased in blood taken from the external jugular vein (EJV) in humans during migraine and after stimulation of the trigeminal ganglion. To test the hypothesis that cortical SD may elevate the concentration of this vasoactive peptide in the EJV during migraine, we have measured its concentration in the external jugular vein of cats during cortical SD. This study demonstrates that SD has no effect on the concentration of CGRP either during the passage of a wave of spreading depression across the cortex or, 60 min later, during the period of post-SD cortical oligemia.
Institute of Neurological Sciences, Prince Henry Hospital, University of New South Wales, Sydney, Australia.
R D
RD
Piper
L
L
Edvinsson
R
R
Ekman
G A
GA
Lambert
D000818:Animals; D001921:Brain / Q000098:blood supply*; D015740:Calcitonin Gene-Related Peptide / Q000097:blood / Q000378:metabolism*; D002415:Cats; D002560:Cerebrovascular Circulation / Q000502:physiology; D013181:Cortical Spreading Depression / Q000502:physiology*; D007211:Indoles / Q000627:therapeutic use; D007601:Jugular Veins; D008881:Migraine Disorders / Q000188:drug therapy / Q000378:metabolism / Q000503:physiopathology*; D013449:Sulfonamides / Q000627:therapeutic use; D018170:Sumatriptan; D014276:Trigeminal Nerve / Q000502:physiology*; D014662:Vasoconstrictor Agents / Q000627:therapeutic use
D007211:Indoles; D013449:Sulfonamides; D014662:Vasoconstrictor Agents; D018170:Sumatriptan; D015740:Calcitonin Gene-Related Peptide