title: Drosophila short neuropeptide F signalling regulates growth by ERK-mediated insulin signalling.
abstract: Insulin and insulin growth factor have central roles in growth, metabolism and ageing of animals, including Drosophila melanogaster. In Drosophila, insulin-like peptides (Dilps) are produced by specialized neurons in the brain. Here we show that Drosophila short neuropeptide F (sNPF), an orthologue of mammalian neuropeptide Y (NPY), and sNPF receptor sNPFR1 regulate expression of Dilps. Body size was increased by overexpression of sNPF or sNPFR1. The fat body of sNPF mutant Drosophila had downregulated Akt, nuclear localized FOXO, upregulated translational inhibitor 4E-BP and reduced cell size. Circulating levels of glucose were elevated and lifespan was also extended in sNPF mutants. We show that these effects are mediated through activation of extracellular signal-related kinases (ERK) in insulin-producing cells of larvae and adults. Insulin expression was also increased in an ERK-dependent manner in cultured Drosophila central nervous system (CNS) cells and in rat pancreatic cells treated with sNPF or NPY peptide, respectively. Drosophila sNPF and the evolutionarily conserved mammalian NPY seem to regulate ERK-mediated insulin expression and thus to systemically modulate growth, metabolism and lifespan.
authors.affiliation: Centre for Regenerative Medicine, Korea Research Institute of Bioscience and Biotechnology (KRIBB), Daejeon 305-333, Korea.
authors.forename: Kyu-Sun
authors.initials: KS
authors.lastname: Lee
authors.forename: O-Yu
authors.initials: OY
authors.lastname: Kwon
authors.forename: Joon H
authors.initials: JH
authors.lastname: Lee
authors.forename: Kisang
authors.initials: K
authors.lastname: Kwon
authors.forename: Kyung-Jin
authors.initials: KJ
authors.lastname: Min
authors.forename: Sun-Ah
authors.initials: SA
authors.lastname: Jung
authors.forename: Ae-Kyeong
authors.initials: AK
authors.lastname: Kim
authors.forename: Kwan-Hee
authors.initials: KH
authors.lastname: You
authors.forename: Marc
authors.initials: M
authors.lastname: Tatar
authors.forename: Kweon
authors.initials: K
authors.lastname: Yu
mesh_terms: D000818:Animals; D049628:Body Size; D001921:Brain / Q000166:cytology / Q000378:metabolism; D002460:Cell Line; D002478:Cells, Cultured; D029721:Drosophila Proteins / Q000235:genetics / Q000378:metabolism*; D004331:Drosophila melanogaster / Q000033:anatomy & histology / Q000502:physiology; D004789:Enzyme Activation; D048049:Extracellular Signal-Regulated MAP Kinases / Q000037:antagonists & inhibitors / Q000235:genetics / Q000378:metabolism*; D005947:Glucose / Q000378:metabolism; D006801:Humans; D051034:Inhibitor of Apoptosis Proteins / Q000235:genetics / Q000378:metabolism; D007328:Insulin / Q000378:metabolism*; D007814:Larva / Q000033:anatomy & histology / Q000502:physiology; D008017:Life Expectancy; D009478:Neuropeptide Y / Q000378:metabolism; D009479:Neuropeptides / Q000235:genetics / Q000378:metabolism*; D020033:Protein Isoforms / Q000235:genetics / Q000378:metabolism; D051381:Rats; D011972:Receptor, Insulin / Q000378:metabolism; D018013:Receptors, Neuropeptide / Q000235:genetics / Q000378:metabolism; D017476:Receptors, Neuropeptide Y / Q000235:genetics / Q000378:metabolism; D015398:Signal Transduction / Q000502:physiology*
chemical_list: C111892:DIAP2 protein, Drosophila; D029721:Drosophila Proteins; D051034:Inhibitor of Apoptosis Proteins; D007328:Insulin; C499701:NPFR protein, Drosophila; D009478:Neuropeptide Y; D009479:Neuropeptides; D020033:Protein Isoforms; D018013:Receptors, Neuropeptide; D017476:Receptors, Neuropeptide Y; C400215:neuropeptide F, Drosophila; D011972:Receptor, Insulin; D048049:Extracellular Signal-Regulated MAP Kinases; D005947:Glucose