A pair of dopamine neurons target the D1-like dopamine receptor DopR in the central complex to promote ethanol-stimulated locomotion in Drosophila

• Published in: PloS one Vol. 5; no. 4; p. e9954
• Main Authors: Kong, Eric C, Woo, Katherine, Li, Haiyan, Lebestky, Tim, Mayer, Nasima, Sniffen, Melissa R, Heberlein, Ulrike, Bainton, Roland J, Hirsh, Jay, Wolf, Fred W
• Format: Journal Article
• Language: English
• Published: United States Public Library of Science 01.04.2010; Public Library of Science (PLoS)
• Subjects: Addictions; Addictive behaviors; Alcoholism; Animal behavior; Animals; Behavior, Animal - drug effects; Biology; Brain; Brain research; Central Nervous System Depressants; Cloning; Cocaine; Dopamine; Dopamine - physiology; Dopamine D1 receptors; Dopamine receptors; Drosophila; Drosophila melanogaster; Drosophila Proteins - metabolism; Drug abuse; Drug dosages; Drugs; Ethanol; Ethanol - pharmacology; Exposure; Fruit flies (Tephritidae); Gene expression; Genetics and Genomics/Disease Models; Genetics and Genomics/Genetics of Disease; Hyperactivity; Insects; Locomotion; Locomotion - drug effects; Locomotor activity; Motor Activity; Narcotics; Nervous system; Neural circuitry; Neurons; Neurons - physiology; Neuroscience/Behavioral Neuroscience; Phenols (Class of compounds); Receptors, Dopamine - metabolism; Rodents; Studies; Substrates; San Francisco California; California; United States > US; Virginia
• ISSN: 1932-6203; 1932-6203
• DOI: 10.1371/journal.pone.0009954

Dopamine is a mediator of the stimulant properties of drugs of abuse, including ethanol, in mammals and in the fruit fly Drosophila. The neural substrates for the stimulant actions of ethanol in flies are not known. We show that a subset of dopamine neurons and their targets, through the action of the D1-like dopamine receptor DopR, promote locomotor activation in response to acute ethanol exposure. A bilateral pair of dopaminergic neurons in the fly brain mediates the enhanced locomotor activity induced by ethanol exposure, and promotes locomotion when directly activated. These neurons project to the central complex ellipsoid body, a structure implicated in regulating motor behaviors. Ellipsoid body neurons are required for ethanol-induced locomotor activity and they express DopR. Elimination of DopR blunts the locomotor activating effects of ethanol, and this behavior can be restored by selective expression of DopR in the ellipsoid body. These data tie the activity of defined dopamine neurons to D1-like DopR-expressing neurons to form a neural circuit that governs acute responding to ethanol.