title: Cultured rat striatal and cortical astrocytes protect mesencephalic dopaminergic neurons against hydrogen peroxide toxicity independent of their effect on neuronal development.
abstract: Reactive oxygen species (ROS), including hydrogen peroxide, are supposed to be involved in the degeneration of dopaminergic neurons in Parkinson's disease. The potential role of astrocytes against neurotoxic effects of ROS was studied in cocultures of rat mesencephalic neurons and rat striatal or cortical astrocytes. Neuronal [3H]dopamine uptake, a marker of dopaminergic neuron integrity, was enhanced by striatal astrocytes, but not by cortical astrocytes, compared to uptake in mesencephalic neurons cultured alone. Whereas hydrogen peroxide at concentrations up to 100 microM reduced the [3H]dopamine uptake in neuronal cultures, no reduction of the uptake was observed in cocultures, regardless of the origin of the supporting astrocytes. These results suggest that astrocyte mediated protection of neurons against hydrogen peroxide induced toxicity is not directly related to a region-specific neurotrophic effect.
authors.affiliation: Graduate School Neurosciences Amsterdam, Research Institute Neurosciences Vrije Universiteit, Department of Neurology, The Netherlands.
authors.forename: C H
authors.initials: CH
authors.lastname: Langeveld
authors.forename: C A
authors.initials: CA
authors.lastname: Jongenelen
authors.forename: E
authors.initials: E
authors.lastname: Schepens
authors.forename: J C
authors.initials: JC
authors.lastname: Stoof
authors.forename: A
authors.initials: A
authors.lastname: Bast
authors.forename: B
authors.initials: B
authors.lastname: Drukarch
mesh_terms: D000818:Animals; D001253:Astrocytes / Q000378:metabolism*; D002478:Cells, Cultured; D003342:Corpus Striatum / Q000378:metabolism*; D004298:Dopamine / Q000378:metabolism*; D004305:Dose-Response Relationship, Drug; D006861:Hydrogen Peroxide / Q000633:toxicity*; D010300:Parkinson Disease / Q000378:metabolism; D051381:Rats; D017208:Rats, Wistar; D017382:Reactive Oxygen Species / Q000494:pharmacology
chemical_list: D017382:Reactive Oxygen Species; D006861:Hydrogen Peroxide; D004298:Dopamine