Vasoactive peptide release in the extracerebral circulation of humans during migraine headache

Recent studies have explored the role of the trigeminovascular system in migraines. This system is connected to the cranial vessels and may influence migraine symptoms. Researchers stimulated the trigeminal ganglion in humans to assess its effects. This stimulation caused facial pain, flushing, and the release of neuropeptides. They measured these neuropeptides in patients with common or classic migraine. Blood samples were taken from the external jugular and cubital fossa. They analyzed levels of neuropeptide Y, vasoactive intestinal polypeptide, substance P, and calcitonin gene-related peptide. Results showed a significant increase of calcitonin gene-related peptide in external jugular blood. This increase occurred in both classic and common migraine patients. Notably, classic migraine showed a greater increase than common migraine. Other measured peptides remained unchanged during the study. This finding could be important for understanding migraine pathophysiology and developing treatments. Clinical relevance: This research highlights calcitonin gene-related peptide's role in migraine, suggesting new treatment avenues.