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• W2895008711 abstract "Abstract Dendrites are crucial for receiving information into neurons. Sensory experience affects the structure of these tree-like neurites, which, it is assumed, modifies neuronal function, yet the evidence is scarce, and the mechanisms are unknown. To study whether sensory experience affects dendritic morphology, we use the Caenorhabditis elegans ’ arborized nociceptor PVD neurons, under natural mechanical stimulation induced by physical contacts between individuals. We found that mechanosensory signals induced by conspecifics affect the dendritic structure of the PVD. Moreover, developmentally isolated animals show a decrease in their ability to respond to harsh touch. The structural and behavioral plasticity following sensory deprivation are functionally independent of each other and are mediated by an array of evolutionarily conserved mechanosensory amiloride-sensitive epithelial sodium channels (degenerins). Our genetic results, supported by optogenetic, behavioral, and pharmacological evidence, suggest an activity-dependent homeostatic mechanism for dendritic structural plasticity, that in parallel controls escape response to noxious mechanosensory stimuli. Significance Statement Little is known about how neuronal activity and sensory experience influence the structure and function of dendritic trees. Furthermore, how dendritic structures affect neuronal functions remains to a large extent a mystery despite their fundamental functions in neuronal sensory and synaptic activities in health and diseases. Here we show that complex dendritic trees of the nociceptive and proprioceptive PVD neuron in C. elegans display a dynamic nature where they undergo pronounced dendritic modifications during adulthood. These modifications are determined by the received sensory signals generated by conspecific worms on the plate. We revealed functions for degenerins/Epithelial sodium channels in this phenomenon, using genetic and optogenetic approaches. We found that the degenerin MEC-10 acts cell autonomously to translate environmental mechanical signals into structural and functional modifications in the PVD." @default.
• W2895008711 created "2018-10-12" @default.
• W2895008711 creator A5013396870 @default.
• W2895008711 creator A5058236253 @default.
• W2895008711 date "2018-10-05" @default.
• W2895008711 modified "2023-10-17" @default.
• W2895008711 title "Sensory experience controls dendritic structure and behavior by distinct pathways involving degenerins" @default.
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• W2895008711 doi "https://doi.org/10.1101/436758" @default.
• W2895008711 hasPublicationYear "2018" @default.
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