RRC ID 49289
Author Kim M, Jang D, Yoo E, Oh Y, Sonn JY, Lee J, Ki Y, Son HJ, Hwang O, Lee C, Lim C, Choe J.
Title Rogdi Defines GABAergic Control of a Wake-promoting Dopaminergic Pathway to Sustain Sleep in Drosophila.
Journal Sci Rep
Abstract Kohlschutter-Tönz syndrome (KTS) is a rare genetic disorder with neurological dysfunctions including seizure and intellectual impairment. Mutations at the Rogdi locus have been linked to development of KTS, yet the underlying mechanisms remain elusive. Here we demonstrate that a Drosophila homolog of Rogdi acts as a novel sleep-promoting factor by supporting a specific subset of gamma-aminobutyric acid (GABA) transmission. Rogdi mutant flies displayed insomnia-like behaviors accompanied by sleep fragmentation and delay in sleep initiation. The sleep suppression phenotypes were rescued by sustaining GABAergic transmission primarily via metabotropic GABA receptors or by blocking wake-promoting dopaminergic pathways. Transgenic rescue further mapped GABAergic neurons as a cell-autonomous locus important for Rogdi-dependent sleep, implying metabotropic GABA transmission upstream of the dopaminergic inhibition of sleep. Consistently, an agonist specific to metabotropic but not ionotropic GABA receptors titrated the wake-promoting effects of dopaminergic neuron excitation. Taken together, these data provide the first genetic evidence that implicates Rogdi in sleep regulation via GABAergic control of dopaminergic signaling. Given the strong relevance of GABA to epilepsy, we propose that similar mechanisms might underlie the neural pathogenesis of Rogdi-associated KTS.
Volume 7(1)
Pages 11368
Published 2017-9-12
DOI 10.1038/s41598-017-11941-3
PII 10.1038/s41598-017-11941-3
PMID 28900300
PMC PMC5595912
MeSH Alleles Animals Animals, Genetically Modified Anticonvulsants / pharmacology Brain / drug effects Brain / metabolism Circadian Rhythm / genetics Dopamine / metabolism* Drosophila / physiology* Female GABAergic Neurons / metabolism Loss of Function Mutation Models, Biological Mutation Nuclear Proteins / genetics* Nuclear Proteins / metabolism Receptors, GABA / metabolism Signal Transduction* / drug effects Sleep / genetics* Wakefulness / genetics* gamma-Aminobutyric Acid / metabolism*
IF 3.998
Times Cited 0
Drosophila 12866R-1