Fibroblast growth factor 2 (FGF-2) and glial cell line-derived neurotrophic factor (GDNF) support survival of dopaminergic midbrain neurons. Neurons are coupled by gap junctions, propagating metabolites and intracellular second messengers possibly mediating growth factor effects. We asked, therefore, whether gap junctions influence the survival-promoting effects of FGF-2 and GDNF.
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