RRC ID 59618
著者 Voelker L, Upadhyaya B, Ferkey DM, Woldemariam S, L'Etoile ND, Rabinowitch I, Bai J.
タイトル INX-18 and INX-19 play distinct roles in electrical synapses that modulate aversive behavior in Caenorhabditis elegans.
ジャーナル PLoS Genet
Abstract In order to respond to changing environments and fluctuations in internal states, animals adjust their behavior through diverse neuromodulatory mechanisms. In this study we show that electrical synapses between the ASH primary quinine-detecting sensory neurons and the neighboring ASK neurons are required for modulating the aversive response to the bitter tastant quinine in C. elegans. Mutant worms that lack the electrical synapse proteins INX-18 and INX-19 become hypersensitive to dilute quinine. Cell-specific rescue experiments indicate that inx-18 operates in ASK while inx-19 is required in both ASK and ASH for proper quinine sensitivity. Imaging analyses find that INX-19 in ASK and ASH localizes to the same regions in the nerve ring, suggesting that both sides of ASK-ASH electrical synapses contain INX-19. While inx-18 and inx-19 mutant animals have a similar behavioral phenotype, several lines of evidence suggest the proteins encoded by these genes play different roles in modulating the aversive quinine response. First, INX-18 and INX-19 localize to different regions of the nerve ring, indicating that they are not present in the same synapses. Second, removing inx-18 disrupts the distribution of INX-19, while removing inx-19 does not alter INX-18 localization. Finally, by using a fluorescent cGMP reporter, we find that INX-18 and INX-19 have distinct roles in establishing cGMP levels in ASK and ASH. Together, these results demonstrate that electrical synapses containing INX-18 and INX-19 facilitate modulation of ASH nociceptive signaling. Our findings support the idea that a network of electrical synapses mediates cGMP exchange between neurons, enabling modulation of sensory responses and behavior.
巻・号 15(10)
ページ e1008341
公開日 2019-10-1
DOI 10.1371/journal.pgen.1008341
PII PGENETICS-D-19-01262
PMID 31658255
PMC PMC6837551
MeSH Animals Behavior, Animal / drug effects Caenorhabditis elegans / drug effects Caenorhabditis elegans / genetics* Caenorhabditis elegans Proteins / genetics* Connexins / genetics* Cyclic GMP / genetics Electrical Synapses / drug effects Electrical Synapses / genetics* Gap Junctions / drug effects Gap Junctions / genetics Nociceptors / drug effects Nociceptors / metabolism* Quinine / pharmacology* Sensory Receptor Cells / drug effects Signal Transduction / drug effects
IF 5.224
引用数 0
リソース情報
線虫 tm1896