Document Detail


GABAB receptors play an essential role in maintaining sleep during the second half of the night in Drosophila melanogaster.
MedLine Citation:
PMID:  24068350     Owner:  NLM     Status:  In-Data-Review    
Abstract/OtherAbstract:
GABAergic signalling is important for normal sleep in humans and flies. Here we advance the current understanding of GABAergic modulation of daily sleep patterns by focusing on the role of slow metabotropic GABAB receptors in the fruit fly Drosophila melanogaster. We asked whether GABAB-R2 receptors are regulatory elements in sleep regulation in addition to the already identified fast ionotropic Rdl GABAA receptors. By immunocytochemical and reporter-based techniques we show that the pigment dispersing factor (PDF)-positive ventrolateral clock neurons (LNv) express GABAB-R2 receptors. Downregulation of GABAB-R2 receptors in the large PDF neurons (l-LNv) by RNAi reduced sleep maintenance in the second half of the night, whereas sleep latency at the beginning of the night that was previously shown to depend on ionotropic Rdl GABAA receptors remained unaltered. Our results confirm the role of the l-LNv neurons as an important part of the sleep circuit in D. melanogaster and also identify the GABAB-R2 receptors as the thus far missing component in GABA-signalling that is essential for sleep maintenance. Despite the significant effects on sleep, we did not observe any changes in circadian behaviour in flies with downregulated GABAB-R2 receptors, indicating that the regulation of sleep maintenance via l-LNv neurons is independent of their function in the circadian clock circuit.
Authors:
Florian Gmeiner; Agata Kolodziejczyk; Taishi Yoshii; Dirk Rieger; Dick R Nässel; Charlotte Helfrich-Förster
Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  The Journal of experimental biology     Volume:  216     ISSN:  1477-9145     ISO Abbreviation:  J. Exp. Biol.     Publication Date:  2013 Oct 
Date Detail:
Created Date:  2013-09-26     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0243705     Medline TA:  J Exp Biol     Country:  England    
Other Details:
Languages:  eng     Pagination:  3837-43     Citation Subset:  IM    
Affiliation:
Department of Neurobiology and Genetics, Theodor-Boveri Institute, Biocentre, University of Würzburg, Am Hubland, Würzburg D-97074, Germany.
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Descriptor/Qualifier:

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


Previous Document:  Nonshivering thermogenesis in the African lesser bushbaby, Galago moholi.
Next Document:  Environmental and hormonal factors controlling reversible colour change in crab spiders.