title: The Drosophila ARC homolog regulates behavioral responses to starvation.
abstract: The gene encoding dARC1, one of three Drosophila homologs of mammalian activity-regulated cytoskeleton-associated protein (ARC), is upregulated in both seizure and muscular hypercontraction mutants. In this study we generate a null mutant for dArc1 and show that this gene is not involved in synaptic plasticity at the larval neuromuscular junction or in formation or decay of short-term memory of courtship conditioning, but rather is a modifier of stress-induced behavior. dARC1 is expressed in a number of neurosecretory cells and mutants are starvation-resistant, exhibiting an increased time of survival in the absence of food. Starvation resistance is likely due to the fact that dArc1 mutants lack the normal hyperlocomotor response to starvation, which is almost universal in the animal kingdom. dARC1 acts in insulin-producing neurons of the pars intercerebralis to control this behavior, but does not appear to be a general regulator of insulin signaling. This suggests that there are multiple modes of communication between the pars and the ring gland that control starvation-induced behavioral responses.
authors: Department of Biology and National Center for Behavior Genomics, Brandeis University, Waltham, MA 02454-9110, USA.
authors: Mark D
authors: MD
authors: Mattaliano
authors: Enrico S
authors: ES
authors: Montana
authors: Katherine M
authors: KM
authors: Parisky
authors: J Troy
authors: JT
authors: Littleton
authors: Leslie C
authors: LC
authors: Griffith
mesh_terms: D000704:Analysis of Variance; D000818:Animals; D030801:Animals, Genetically Modified; D001522:Behavior, Animal / Q000502:physiology*; D003380:Courtship; D004307:Dose-Response Relationship, Radiation; D004330:Drosophila; D029721:Drosophila Proteins / Q000172:deficiency / Q000235:genetics / Q000502:physiology*; D004558:Electric Stimulation / Q000379:methods; D004625:Embryo, Nonmammalian; D005786:Gene Expression Regulation / Q000235:genetics; D005947:Glucose / Q000378:metabolism; D049452:Green Fluorescent Proteins / Q000378:metabolism; D009043:Motor Activity / Q000235:genetics; D009469:Neuromuscular Junction / Q000235:genetics / Q000502:physiology / Q000528:radiation effects; D013217:Starvation / Q000503:physiopathology*; D014199:Trehalose / Q000378:metabolism
chemical_list: D029721:Drosophila Proteins; C409458:a protein, Drosophila; D049452:Green Fluorescent Proteins; D014199:Trehalose; D005947:Glucose
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