The neural circuits and sensory channels mediating harsh touch sensation in Caenorhabditis elegans

Wei Li, Lijun Kang, Beverly J. Piggott, Zhaoyang Feng, X. Z.Shawn Xu

Research output: Contribution to journalArticlepeer-review

Abstract

Most animals can distinguish two distinct types of touch stimuli: gentle (innocuous) and harsh (noxious/painful) touch, however, the underlying mechanisms are not well understood. Caenorhabditis elegans is a useful model for the study of gentle touch sensation. However, little is known about harsh touch sensation in this organism. Here we characterize harsh touch sensation in C. elegans. We show that C. elegans exhibits differential behavioural responses to harsh touch and gentle touch. Laser ablations identify distinct sets of sensory neurons and interneurons required for harsh touch sensation at different body segments. Optogenetic stimulation of the circuitry can drive behaviour. Patch-clamp recordings reveal that TRP family and amiloride-sensitive Na + channels mediate touch-evoked currents in different sensory neurons. Our work identifies the neural circuits and characterizes the sensory channels mediating harsh touch sensation in C. elegans, establishing it as a genetic model for studying this sensory modality.

Original languageEnglish
Article number315
JournalNature Communications
Volume2
Issue number1
DOIs
StatePublished - 2011

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