title: Increased dopaminergic signaling impairs aversive olfactory memory retention in Drosophila.
abstract: Dopamine is necessary for the aversive olfactory associative memory formation in Drosophila, but its effect on other stages of memory is not known. Herein, we studied the effect of enhanced dopaminergic signaling on aversive olfactory memory retention in flies. We used l-3,4-dihydroxyphenylalanine (l-DOPA) to elevate dopamine levels: l-DOPA-treated flies exhibited a normal learning performance, but a decrease in 1-h memory. Dopamine transporter (DAT) mutant flies or flies treated with the DAT inhibitor desipramine exhibited poor memory retention. Flies subjected to heat stress after training exhibited a decrease in memory. Memory was restored by blocking dopaminergic neuronal output during heat stress, suggesting that dopamine is involved in heat stress-induced memory impairment in flies. Taken together, our findings suggest that increased dopaminergic signaling impairs aversive olfactory memory retention in flies.
authors.affiliation: State Key Laboratory of Brain and Cognitive Science, Institute of Biophysics, Chinese Academy of Sciences, 15 Datun Road, Chaoyang District, Beijing 100101, China.
authors.forename: Shixing
authors.initials: S
authors.lastname: Zhang
authors.forename: Yan
authors.initials: Y
authors.lastname: Yin
authors.forename: Huimin
authors.initials: H
authors.lastname: Lu
authors.forename: Aike
authors.initials: A
authors.lastname: Guo
mesh_terms: D000818:Animals; D003891:Desipramine / Q000494:pharmacology; D004298:Dopamine / Q000378:metabolism*; D050483:Dopamine Plasma Membrane Transport Proteins / Q000037:antagonists & inhibitors / Q000378:metabolism; D029721:Drosophila Proteins / Q000037:antagonists & inhibitors / Q000378:metabolism; D004331:Drosophila melanogaster / Q000187:drug effects / Q000378:metabolism / Q000502:physiology*; D007980:Levodopa / Q000494:pharmacology; D008568:Memory / Q000187:drug effects; D009474:Neurons / Q000187:drug effects / Q000378:metabolism / Q000502:physiology; D015398:Signal Transduction; D012903:Smell / Q000187:drug effects
chemical_list: C493211:DAT protein, Drosophila; D050483:Dopamine Plasma Membrane Transport Proteins; D029721:Drosophila Proteins; D007980:Levodopa; D003891:Desipramine; D004298:Dopamine