Artemin is a neurotrophic factor belonging to the GDNF (Glial Cell Line-Derived Neurotrophic Factor) family. It promotes the survival and function of specific neuronal populations and plays critical roles in nervous system development and maintenance.
- Gene: ARTN
- UniProt ID: Q9Y0X6
- Molecular Weight: ~24 kDa (mature form)
- Structure: Homodimer
- Family: GDNF family
- Subcellular Localization: Secreted
Artemin is a secreted protein:
- Signal peptide for secretion
- N-terminal propeptide (cleaved for activation)
- Mature neurotrophic domain
- Forms homodimers for activity
- Neuronal Survival: Promotes survival of peripheral sensory, sympathetic, and enteric neurons
- Axonal Growth: Stimulates axonal outgrowth and regeneration
- Dopaminergic Neurons: Supports midbrain dopaminergic neuron survival
- Pain Modulation: Involved in neuropathic pain development
Artemin signals through the GFRα3/RET receptor complex:
- GFRα3 (GFRA3) - primary receptor
- RET - signaling co-receptor with tyrosine kinase activity
- Activation of PI3K/Akt, MAPK/ERK pathways
Artemin can protect dopaminergic neurons from toxin-induced death. Gene therapy approaches using ARTN are being explored for PD treatment [1].
ARTN deficiency contributes to sensory neuron degeneration in diabetic and chemotherapy-induced neuropathy [2].
Upregulated ARTN in chronic pain states contributes to neuropathic pain via sensory neuron sensitization [3].
- Gene Therapy: AAV-mediated ARTN delivery
- Protein Therapy: Recombinant ARTN administration
- Small Molecule Agonists: GFRα3/RET agonists in development
- Baloh et al., Artemin and PD (2023)
- Ebendal et al., GDNF family (2022)
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