The Role of Adenosine Signaling in Headache: A Review.
Migraine is the third most prevalent disease on the planet, yet our understanding of its mechanisms and pathophysiology is surprisingly incomplete. Recent studies have built upon decades of evidence that adenosine, a purine nucleoside that can act as a neuromodulator, is involved in pain transmission and sensitization. Clinical evidence and rodent studies have suggested that adenosine signaling also plays a critical role in migraine headache. This is further supported by the widespread use of caffeine, an adenosine receptor antagonist, in several headache treatments. In this review, we highlight evidence that supports the involvement of adenosine signaling in different forms of headache, headache triggers, and basic headache physiology. This evidence supports adenosine A2Areceptors as a critical adenosine receptor subtype involved in headache pain. Adenosine A2Areceptor signaling may contribute to headache via the modulation of intracellular Cyclic adenosine monophosphate (cAMP) production or 5' AMP-activated protein kinase (AMPK) activity in neurons and glia to affect glutamatergic synaptic transmission within the brainstem. This evidence supports the further study of adenosine signaling in headache and potentially illuminates it as a novel therapeutic target for migraine.
Department of Neurology, Thomas Jefferson University, Philadelphia, PA 19107, USA. nathanth@mail.med.upenn.edu.|Department of Neuroscience, University of Pennsylvania, Philadelphia, PA 19104, USA. nathanth@mail.med.upenn.edu.
Nathan T
NT
Fried
Department of Neurosurgery, Thomas Jefferson University, Philadelphia, PA 19107, USA. melanie.elliott@jefferson.edu.
Melanie B
MB
Elliott
Department of Neurology, Thomas Jefferson University, Philadelphia, PA 19107, USA. michael.oshinsky@nih.gov.|National Institutes of Health, National Institute of Neurological Disorders and Stroke, Bethesda, MD 20892, USA. michael.oshinsky@nih.gov.
Michael L
ML
Oshinsky
adenosine; adenosine receptors; astrocytes; headache; migraine; mitochondria; trigeminal