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Steuer Costa, Wagner; Van der Auwera, Petrus; Glock, Caspar; Liewald, Jana F; Bach, Maximilian; Schüler, Christina; Wabnig, Sebastian; Oranth, Alexandra; Masurat, Florentin; Bringmann, Henrik; Schoofs, Liliane; Stelzer, Ernst H K; Fischer, Sabine C; Gottschalk, Alexander
Nature communications, 09/2019, Letnik: 10, Številka: 1Journal Article
Animals must slow or halt locomotion to integrate sensory inputs or to change direction. In Caenorhabditis elegans, the GABAergic and peptidergic neuron RIS mediates developmentally timed quiescence. Here, we show RIS functions additionally as a locomotion stop neuron. RIS optogenetic stimulation caused acute and persistent inhibition of locomotion and pharyngeal pumping, phenotypes requiring FLP-11 neuropeptides and GABA. RIS photoactivation allows the animal to maintain its body posture by sustaining muscle tone, yet inactivating motor neuron oscillatory activity. During locomotion, RIS axonal Ca2+ signals revealed functional compartmentalization: Activity in the nerve ring process correlated with locomotion stop, while activity in a branch correlated with induced reversals. GABA was required to induce, and FLP-11 neuropeptides were required to sustain locomotion stop. RIS attenuates neuronal activity and inhibits movement, possibly enabling sensory integration and decision making, and exemplifies dual use of one cell across development in a compact nervous system.
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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in: SICRIS
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