title: Roles of juvenile hormone, a brain factor and adipokinetic hormone in regulation of vitellogenin biosynthesis in locusta migratoria.
abstract: In maturing adult female migratory locusts, the rises in JH and Vg in the hemolymph are greatly accelerated by enriched feeding; hereafter the JH titer fluctuates with vitellogenic cycles, falling to a low level at the oviposition stage. In fat bodies incubated in vitro, the JH analog, methoprene, and brain extract from well-fed locusts (but not starved locusts) stimulated Vg synthesis synergistically. Repeated washing of fat bodies from oviposition stage locusts led to a rise in Vg synthesis after 4 h, which was prevented by addition of locust adipokinetic hormone (AKH). We conclude that at least three hormonal factors interact in the control of Vg synthesis in locus fat body: JH and a brain factor stimulate, reflecting development and nutrition, while AKH inhibits at the oviposition stage.
authors.affiliation: A.N. Bach Institute of Biochemistry, Russian Academy of Sciences, Moscow.
authors.forename: A V
authors.initials: AV
authors.lastname: Glinka
authors.forename: A M
authors.initials: AM
authors.lastname: Kleiman
authors.forename: G R
authors.initials: GR
authors.lastname: Wyatt
mesh_terms: D000818:Animals; D005260:Female; D005786:Gene Expression Regulation; D006110:Grasshoppers / Q000254:growth & development / Q000378:metabolism*; D006458:Hemolymph / Q000378:metabolism; D007301:Insect Hormones / Q000502:physiology*; D007605:Juvenile Hormones / Q000502:physiology*; D008297:Male; D009479:Neuropeptides / Q000502:physiology*; D009842:Oligopeptides / Q000502:physiology*; D010053:Ovary / Q000502:physiology; D011761:Pyrrolidonecarboxylic Acid / Q000031:analogs & derivatives; D013997:Time Factors; D014819:Vitellogenins / Q000096:biosynthesis*
chemical_list: D007301:Insect Hormones; D007605:Juvenile Hormones; D009479:Neuropeptides; D009842:Oligopeptides; D014819:Vitellogenins; C044833:adipokinetic hormone; D011761:Pyrrolidonecarboxylic Acid