RRC ID 59118
Author Ki Y, Lim C.
Title Sleep-promoting effects of threonine link amino acid metabolism in Drosophila neuron to GABAergic control of sleep drive.
Journal Elife
Abstract Emerging evidence indicates the role of amino acid metabolism in sleep regulation. Here we demonstrate sleep-promoting effects of dietary threonine (SPET) in Drosophila. Dietary threonine markedly increased daily sleep amount and decreased the latency to sleep onset in a dose-dependent manner. High levels of synaptic GABA or pharmacological activation of metabotropic GABA receptors (GABAB-R) suppressed SPET. By contrast, synaptic blockade of GABAergic neurons or transgenic depletion of GABAB-R in the ellipsoid body R2 neurons enhanced sleep drive non-additively with SPET. Dietary threonine reduced GABA levels, weakened metabotropic GABA responses in R2 neurons, and ameliorated memory deficits in plasticity mutants. Moreover, genetic elevation of neuronal threonine levels was sufficient for facilitating sleep onset. Taken together, these data define threonine as a physiologically relevant, sleep-promoting molecule that may intimately link neuronal metabolism of amino acids to GABAergic control of sleep drive via the neuronal substrate of sleep homeostasis.
Editorial note:This article has been through an editorial process in which the authors decide how to respond to the issues raised during peer review. The Reviewing Editor's assessment is that all the issues have been addressed (see decision letter).
Volume 8
Published 2019-7-17
DOI 10.7554/eLife.40593
PII 40593
PMID 31313987
PMC PMC6636906
MeSH Animal Feed Animals Drosophila / drug effects Drosophila / physiology* GABAergic Neurons / metabolism* Sleep* Sleep Aids, Pharmaceutical / administration & dosage* Threonine / administration & dosage* gamma-Aminobutyric Acid / metabolism
IF 7.08
Times Cited 6
Drosophila DGRC#201409 DGRC#106444 DGRC#106453 DGRC#141269