Trends in pharmacological sciences
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The calcitonin gene-related peptide (CGRP) receptor system has emerged as an important drug target for migraine. This is highlighted by the recent regulatory approval of the first drug targeting the CGRP signalling pathway, the CGRP receptor antibody erenumab. ⋯ G protein-coupled receptors (GPCRs) were thought to signal only at the cell surface, but it is now recognised that some GPCRs, including the CGRP receptor, undergo sustained signalling from endosomes, once internalised in response to ligand. What does this mean for drugs like erenumab? This review covers recent insights into the regulation of CGRP family receptors and examines what implications this may have on drug activity.