Expression of melatonin receptors in trigeminal and sphenopalatine ganglia: potential targets for primary headache disorders

This study demonstrates that MT1 and MT2 receptors are expressed in the TVS and SPG, key components involved in migraine and cluster headache. Melatonin receptor co-localization with neuropeptides involved in autonomic and sensory neuronal regulation supports a potential mechanism by which melatonin influences headache onset and progression. Together, these findings support a role for melatonin influences in primary headache pathophysiology and point to its potential for novel headache treatment.