Definition
Calcitonin gene-related peptide (CGRP) is a 37-amino acid neuropeptide. There are two major isoforms of CGRP, αCGRP, and βCGRP that are encoded by two distinct genes. Alternative splicing of the CALC1 gene, which also encodes calcitonin, results in the transcript for αCGRP. The resulting 121-amino acid pro-hormone is then generated through cleavage of the protein. βCGRP is encoded by the CALC2 gene. At the protein level, the two forms have a homology of >90%. The receptor for CGRP is a G protein-coupled receptor (GPRC class B), the calcitonin receptor-like receptor (CALCRL), that must form a heterodimer with the receptor activity-modifying protein 1 (RAMP1) to be functional. CGRP is widely expressed in nociceptive pathways in the central and peripheral nervous system, and its receptor is also expressed in pain pathways.
Features
The trigeminovascular system consists of sensory neurons that originate...
References and Further Reading
Edvinsson, L., Haanes, K. A., Warfvinge, K., & Krause, D. N. (2018). CGRP as the target of new migraine therapies – Successful translation from bench to clinic. Nature Reviews. Neurology, 14(6), 338–350.
Russell, F. A., King, R., Smillie, S. J., Kodji, X., & Brain, S. D. (2014). Calcitonin gene-related peptide: Physiology and pathophysiology. Physiological Reviews, 94(4), 1099–1142.
Schou, W. S., Ashina, S., Amin, F. M., Goadsby, P. J., & Ashina, M. (2017). Calcitonin gene-related peptide and pain: A systematic review. The Journal of Headache and Pain, 18(1), 34.
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Kopp, P. (2022). Calcitonin Gene-Related Peptide (CGRP). In: van Krieken, J. (eds) Encyclopedia of Pathology. Encyclopedia of Pathology. Springer, Cham. https://doi.org/10.1007/978-3-319-28845-1_5165-1
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DOI: https://doi.org/10.1007/978-3-319-28845-1_5165-1
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