A conserved neuropeptide system links head and body motor circuits to enable adaptive behavior
Lemons, Michele L.
Lambert, Christopher M.
Alkema, Mark J.
Francis, Michael M.
UMass Chan AffiliationsGraduate School of Biomedical Sciences
Department of Neurobiology
G protein-coupled receptor
Amino Acids, Peptides, and Proteins
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AbstractNeuromodulators promote adaptive behaviors that are often complex and involve concerted activity changes across circuits that are often not physically connected. It is not well understood how neuromodulatory systems accomplish these tasks. Here, we show that the Caenorhabditis elegans NLP-12 neuropeptide system shapes responses to food availability by modulating the activity of head and body wall motor neurons through alternate G-protein coupled receptor (GPCR) targets, CKR-1 and CKR-2. We show ckr-2 deletion reduces body bend depth during movement under basal conditions. We demonstrate CKR-1 is a functional NLP-12 receptor and define its expression in the nervous system. In contrast to basal locomotion, biased CKR-1 GPCR stimulation of head motor neurons promotes turning during local searching. Deletion of ckr-1 reduces head neuron activity and diminishes turning while specific ckr-1 overexpression or head neuron activation promote turning. Thus, our studies suggest locomotor responses to changing food availability are regulated through conditional NLP-12 stimulation of head or body wall motor circuits.
Ramachandran S, Banerjee N, Bhattacharya R, Lemons ML, Florman J, Lambert CM, Touroutine D, Alexander K, Schoofs L, Alkema MJ, Beets I, Francis MM. A conserved neuropeptide system links head and body motor circuits to enable adaptive behavior. Elife. 2021 Nov 12;10:e71747. doi: 10.7554/eLife.71747. PMID: 34766905; PMCID: PMC8626090. Link to article on publisher's site