What is the central role of CGRP in migraine pathophysiology?

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Multiple Choice

What is the central role of CGRP in migraine pathophysiology?

The central idea is that CGRP acts as a key messenger in the trigeminovascular system during a migraine, driving the vascular, inflammatory, and pain-signaling changes that fuel an attack. When trigeminal sensory fibers innervating the meninges are activated, CGRP is released. This peptide then causes strong dilation of meningeal blood vessels and promotes neurogenic inflammation, increasing vascular permeability and encouraging inflammatory mediator release. This inflammatory milieu sensitizes nearby nociceptors and enhances the transmission of pain signals through the trigeminal pathways, helping to sustain and amplify the headache. Contextual support: CGRP is one of the most potent neuropeptides in this system, and administering CGRP can provoke migraine-like attacks in susceptible individuals. Therapies that block CGRP or its receptor are effective in preventing migraines, underscoring its central role in the pathophysiology. Its actions are not inhibitory or protective against pain, and it does play a significant role in migraines, making this option the best explanation of CGRP’s central role.

The central idea is that CGRP acts as a key messenger in the trigeminovascular system during a migraine, driving the vascular, inflammatory, and pain-signaling changes that fuel an attack. When trigeminal sensory fibers innervating the meninges are activated, CGRP is released. This peptide then causes strong dilation of meningeal blood vessels and promotes neurogenic inflammation, increasing vascular permeability and encouraging inflammatory mediator release. This inflammatory milieu sensitizes nearby nociceptors and enhances the transmission of pain signals through the trigeminal pathways, helping to sustain and amplify the headache.

Contextual support: CGRP is one of the most potent neuropeptides in this system, and administering CGRP can provoke migraine-like attacks in susceptible individuals. Therapies that block CGRP or its receptor are effective in preventing migraines, underscoring its central role in the pathophysiology. Its actions are not inhibitory or protective against pain, and it does play a significant role in migraines, making this option the best explanation of CGRP’s central role.

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