Calcitonin gene-related peptide (CGRP) neurons produce CGRP, a 37-amino acid neuropeptide that acts as one of the most potent vasodilators known and plays critical roles in pain transmission, neuroinflammation, and autonomic regulation. These neurons are widely distributed throughout the central and peripheral nervous systems and have emerged as key players in migraine pathophysiology and neurodegenerative disease processes. [1]
| Property | Value | [2]
|----------|-------| [3]
| Category | Neuropeptide Neurons | [4]
| Location | Trigeminal ganglion, dorsal root ganglion, hypothalamus, cortex, brainstem | [5]
| Cell Types | CGRP-producing neurons (primary afferent, central) | [6]
| Primary Neurotransmitter | CGRP (α-CGRP, β-CGRP) | [7]
| Key Markers | CALCA (α-CGRP gene), CALCB (β-CGRP gene), CALCRL (CLR), RAMP1 | [8]
| Receptors | CALCRL/RAMP1 (CLR), CALCR (calcitonin receptor) |
| Taxonomy | ID | Name / Label |
|---|---|---|
| Cell Ontology (CL) | CL:4033107 | superior cervical ganglion CGRP neuron |
The CALCA gene encodes prepro-CGRP, a 128-amino acid precursor that is processed to produce α-CGRP. The CALCB gene produces β-CGRP, which differs by three amino acids and has similar but distinct functions. Alternative splicing of the CALC1 gene generates both CGRP and calcitonin.
CGRP signals through a heterodimeric receptor consisting of:
This receptor is widely expressed in the nervous system, vasculature, and immune cells.
CGRP neurons in dorsal root ganglia (DRG) and trigeminal ganglia are primary nociceptors that detect:
CGRP neurons play a central role in migraine pathophysiology:
CGRP can modulate glutamate excitotoxicity through:
The study of Cgrp Neurons has evolved significantly over the past decades. Research in this area has revealed important insights into the underlying mechanisms of neurodegeneration and continues to drive therapeutic development.
Historical context and key discoveries in this field have shaped our current understanding and will continue to guide future research directions.
Russell FA. Calcitonin gene-related peptide (CGRP): the story of an unconventional neuropeptide. Headache. 2014. 2014. ↩︎
Giamberardino MA. Role of CGRP in migraine and headache. Handb Clin Neurol. 2021. 2021. ↩︎
Pietrobon D, Moskowitz MA. Pathophysiology of migraine. Annu Rev Physiol. 2013. 2013. ↩︎
Edvinsson L. Role of CGRP in migraine. Handb Clin Neurol. 2020. 2020. ↩︎
Walker CS, Hay DL. CGRP in the trigeminovascular system: a role for CGRP receptors. Cephalalgia. 2016. 2016. ↩︎
Iyengar S, et al. CGRP and its receptors in the trigeminovascular system. Headache. 2019. 2019. ↩︎
Russo AF. Calcitonin gene-related peptide (CGRP): what you need to know. Headache. 2018. 2018. ↩︎
Ferrari MD, et al. CGRP receptor antagonists for acute migraine. Nat Rev Drug Discov. 2019. 2019. ↩︎