Glial cell line–derived neurotrophic factor (GDNF)

Glial cell line–derived neurotrophic factor (GDNF) is a secreted protein essential for the survival, differentiation, and maintenance of various neuronal populations, particularly dopaminergic and motor neurons[1][2][4][7]. Encoded by the GDNF gene on chromosome 5, it belongs to the transforming growth factor-β (TGF-β) superfamily and is characterized structurally as a cysteine knot growth factor[2][5]. GDNF forms homodimers stabilized by disulfide bonds and binds with high affinity to the GDNF family receptor alpha-1 (GFRα1), which in turn recruits and activates the RET receptor tyrosine kinase, initiating multiple intracellular pathways (including PI3K/Akt and MAPK/ERK) that support neuronal survival, development, axon guidance, and synaptic plasticity[1][2][4][7]. GDNF is expressed in both the central and peripheral nervous systems as well as in non-neuronal tissues (kidney, testis), reflecting its diverse physiological effects[1][2]. Clinically, GDNF is being explored as a therapeutic target for neurodegenerative diseases such as Parkinson’s disease due to its potent neuroprotective properties, but there remain significant challenges for effective delivery and safety, such as restricted tissue penetration and complex regulation of its signaling pathways[1][2][6].

Other names

GDNFATF1HFB1-GDNFGDNF family ligand 1 (GFL1)Glial-derived neurotrophic factor

Activation of GFRα1/RET receptor complex to promote cell survival and differentiation; downstream PI3K/Akt and MAPK/ERK pathway induction; direct support of dopaminergic neuron survival