Glial cell-derived neurotrophic factor (GDNF)

Glial cell-derived neurotrophic factor (GDNF) is a secreted, highly conserved member of the TGF-β superfamily, originally purified as a survival-promoting factor for dopaminergic neurons. Structurally, it is a disulfide-linked homodimer with "finger-like" projections critical for receptor binding and dimerization. GDNF interacts primarily with the GFRα1 co-receptor, which allows it to activate the RET receptor tyrosine kinase, leading to robust support of neuron survival, growth, and differentiation. Its physiological roles are prominent in both the central and peripheral nervous systems, where it supports the survival and function of a broad range of neurons, including motor neurons. GDNF and related family members (neurturin, artemin, persephin, and GDF15) share similar receptor preferences and signaling cascades. Therapeutically, GDNF is being investigated as a protein drug and gene therapy agent in conditions like Parkinson’s disease, but faces significant translational challenges including safety and delivery to target tissues.

Other names

Glial cell line-derived neurotrophic factorGDNFNerve growth factor GDNF

Agonist/replacement therapy: Recombinant GDNF or mimetics act as direct agonists to stimulate RET signaling pathways, promoting neuron survival and differentiation. Upregulation: Compounds like ibogaine promote endogenous GDNF expression in neural tissues. Indirect modulation: RET or GFRα1 targeting with small molecules.