The neuropeptide NLP-22 regulates a sleep-like state in Caenorhabditis elegans.

Abstract:

:Neuropeptides have central roles in the regulation of homoeostatic behaviours such as sleep and feeding. Caenorhabditis elegans displays sleep-like quiescence of locomotion and feeding during a larval transition stage called lethargus and feeds during active larval and adult stages. Here we show that the neuropeptide NLP-22 is a regulator of Caenorhabditis elegans sleep-like quiescence observed during lethargus. nlp-22 shows cyclical mRNA expression in synchrony with lethargus; it is regulated by LIN-42, an orthologue of the core circadian protein PERIOD; and it is expressed solely in the two RIA interneurons. nlp-22 and the RIA interneurons are required for normal lethargus quiescence, and forced expression of nlp-22 during active stages causes anachronistic locomotion and feeding quiescence. Optogenetic stimulation of the RIA interneurons has a movement-promoting effect, demonstrating functional complexity in a single-neuron type. Our work defines a quiescence-regulating role for NLP-22 and expands our knowledge of the neural circuitry controlling Caenorhabditis elegans behavioural quiescence.

journal_name

Nat Commun

journal_title

Nature communications

authors

Nelson MD,Trojanowski NF,George-Raizen JB,Smith CJ,Yu CC,Fang-Yen C,Raizen DM

doi

10.1038/ncomms3846

subject

Has Abstract

pub_date

2013-01-01 00:00:00

pages

2846

issn

2041-1723

pii

ncomms3846

journal_volume

4

pub_type

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