GSBS Student Publications
Title
A subset of dorsal neurons modulates circadian behavior and light responses in Drosophila
GSBS Program
Neuroscience
UMMS Affiliation
Department of Neurobiology; Emery Lab; Graduate School of Biomedical Sciences, Neuroscience Program
Date
3-3-2007
Document Type
Article
Medical Subject Headings
Animals; Animals, Genetically Modified; Circadian Rhythm; Darkness; Drosophila; Drosophila Proteins; Eye Proteins; Lighting; Neurons; Neuropeptides; Nuclear Proteins; Receptors, G-Protein-Coupled
Disciplines
Neuroscience and Neurobiology
Abstract
A fundamental property of circadian rhythms is their ability to persist under constant conditions. In Drosophila, the ventral Lateral Neurons (LNvs) are the pacemaker neurons driving circadian behavior under constant darkness. Wild-type flies are arrhythmic under constant illumination, but flies defective for the circadian photoreceptor CRY remain rhythmic. We found that flies overexpressing the pacemaker gene per or the morgue gene are also behaviorally rhythmic under constant light. Unexpectedly, the LNvs do not drive these rhythms: they are molecularly arrhythmic, and PDF--the neuropeptide they secrete to synchronize behavioral rhythms under constant darkness--is dispensable for rhythmicity in constant light. Molecular circadian rhythms are only found in a group of Dorsal Neurons: the DN1s. Thus, a subset of Dorsal Neurons shares with the LNvs the ability to function as pacemakers for circadian behavior, and its importance is promoted by light.
Rights and Permissions
Citation: Neuron. 2007 Mar 1;53(5):689-701. Link to article on publisher's site
DOI of Published Version
10.1016/j.neuron.2007.01.034
Related Resources
Journal Title
Neuron
PubMed ID
17329209
Repository Citation
Murad, Alejandro D.; Emery-Le, Myai; and Emery, Patrick, "A subset of dorsal neurons modulates circadian behavior and light responses in Drosophila" (2007). GSBS Student Publications. 890.
https://escholarship.umassmed.edu/gsbs_sp/890