title: Cellular colocalization of diuretic peptides in locusts: a potent control mechanism.
abstract: Locust abdominal ganglia are shown to colocalize Locusta-diuretic peptide-, leucokinin I-, and lysine vasopressin-like immunoreactivity in posterior lateral neurosecretory cells. Extracts of abdominal ganglia were partially purified by RP-HPLC then dot immunoassay screened with the same antisera used for immunocytochemistry. Locusta-diuretic peptide-like immunoreactive material coeluted with synthetic Locusta-diuretic peptide, and leucokinin-like immunoreactive material coeluted with locustakinin. Lysine vasopressin-like material eluted in fractions that also showed Locusta-diuretic peptide and leucokinin I immunoreactivity. The diuretic activity of synthetic Locusta-diuretic peptide and locustakinin is demonstrated, and they are shown to act at least additively to promote Malpighian tubule fluid secretion. The immunoreactive neurosecretory cells are assumed to express at least these two peptides, and a model for promoting fluid secretion is proposed.
authors.affiliation: Sussex Centre for Neuroscience, School of Biological Sciences, Brighton, UK.
authors.forename: K S
authors.initials: KS
authors.lastname: Thompson
authors.forename: R C
authors.initials: RC
authors.lastname: Rayne
authors.forename: C R
authors.initials: CR
authors.lastname: Gibbon
authors.forename: S T
authors.initials: ST
authors.lastname: May
authors.forename: M
authors.initials: M
authors.lastname: Patel
authors.forename: G M
authors.initials: GM
authors.lastname: Coast
authors.forename: J P
authors.initials: JP
authors.lastname: Bacon
mesh_terms: D000005:Abdomen / Q000033:anatomy & histology; D000595:Amino Acid Sequence; D000818:Animals; D000941:Antigens / Q000032:analysis; D004232:Diuretics / Q000032:analysis / Q000378:metabolism; D005260:Female; D017952:Ganglia, Invertebrate / Q000737:chemistry; D006110:Grasshoppers / Q000737:chemistry / Q000166:cytology / Q000378:metabolism*; D007118:Immunoassay / Q000379:methods; D007301:Insect Hormones / Q000032:analysis* / Q000494:pharmacology / Q000502:physiology; D008236:Lypressin / Q000032:analysis / Q000276:immunology / Q000378:metabolism*; D008297:Male; D008317:Malpighian Tubules / Q000378:metabolism; D008969:Molecular Sequence Data; D009479:Neuropeptides / Q000032:analysis / Q000276:immunology / Q000378:metabolism*; D009490:Neurosecretory Systems / Q000737:chemistry / Q000276:immunology / Q000648:ultrastructure; D009842:Oligopeptides / Q000032:analysis* / Q000276:immunology / Q000378:metabolism* / Q000494:pharmacology
chemical_list: D000941:Antigens; D004232:Diuretics; D007301:Insect Hormones; D009479:Neuropeptides; D009842:Oligopeptides; C083926:leucokinin I; C072468:diuretic peptide, Locusta-DP; C074457:locustakinin; D008236:Lypressin