title: UCP4 expression changes in larval and pupal fat bodies of the beetle Zophobas atratus under adipokinetic hormone treatment.
abstract: We investigated the influence of adipokinetic hormone (AKH), an insect neurohormone, on uncoupling protein 4 (ZaUCP4) expression and activity in larval and pupal fat body mitochondria of the beetle Zophobas atratus in relation to intermediary metabolism. Homologous Tenmo-AKH was administered to the beetle larvae and pupae as either a single dose or as two doses of 20pmol during a 24h interval. In the larval and pupal fat bodies, downregulation of ZaUCP4 expression at the mRNA and protein levels was observed 24h and 48h after AKH treatment, respectively. In both developmental stages, ZaUCP4 activity was lowered in fat body mitochondria 48h after AKH treatment. In the AKH-injected larvae, changes in ZaUCP4 expression were accompanied by the mobilization of carbohydrate reserves, no change in the concentration of total lipids and an increase in the free fatty acid level. In contrast, AKH had no effect on carbohydrate metabolism in the pupal fat body but induced lipid mobilization. It seems that AKH influences ZaUCP4 expression by triggering multiple events and that it has different physiological roles in controlling intermediary metabolism in the fat body of the beetle larvae and pupae.
authors.affiliation: Department of Animal Physiology and Development, Adam Mickiewicz University, Umultowska 89, 61-614 Poznan, Poland. slocina@amu.edu.pl
authors.forename: Malgorzata
authors.initials: M
authors.lastname: Slocinska
authors.forename: Nina
authors.initials: N
authors.lastname: Antos-Krzeminska
authors.forename: Marek
authors.initials: M
authors.lastname: Golebiowski
authors.forename: Mariola
authors.initials: M
authors.lastname: Kuczer
authors.forename: Piotr
authors.initials: P
authors.lastname: Stepnowski
authors.forename: Grzegorz
authors.initials: G
authors.lastname: Rosinski
authors.forename: Wieslawa
authors.initials: W
authors.lastname: Jarmuszkiewicz
mesh_terms: D000818:Animals; D050260:Carbohydrate Metabolism / Q000187:drug effects / Q000235:genetics; D002950:Citrate (si)-Synthase / Q000378:metabolism; D001517:Coleoptera / Q000187:drug effects / Q000201:enzymology / Q000235:genetics* / Q000254:growth & development*; D005216:Fat Body / Q000187:drug effects / Q000201:enzymology; D005227:Fatty Acids / Q000378:metabolism; D005786:Gene Expression Regulation / Q000187:drug effects*; D006003:Glycogen / Q000378:metabolism; D006458:Hemolymph / Q000187:drug effects / Q000378:metabolism; D007301:Insect Hormones / Q000494:pharmacology*; D019476:Insect Proteins / Q000235:genetics* / Q000378:metabolism; D007814:Larva / Q000187:drug effects / Q000201:enzymology / Q000235:genetics; D050356:Lipid Metabolism / Q000187:drug effects / Q000235:genetics; D009842:Oligopeptides / Q000494:pharmacology*; D011679:Pupa / Q000187:drug effects / Q000201:enzymology / Q000235:genetics; D011761:Pyrrolidonecarboxylic Acid / Q000031:analogs & derivatives* / Q000494:pharmacology
chemical_list: D005227:Fatty Acids; D007301:Insect Hormones; D019476:Insect Proteins; D009842:Oligopeptides; C044833:adipokinetic hormone; D006003:Glycogen; D002950:Citrate (si)-Synthase; D011761:Pyrrolidonecarboxylic Acid
keywords: AKH; Adipokinetic hormone; Fat body; Larva; Pupa; Tenmo-AKH; UCP(1–5); UCP4; ZaUCP4; Zophobas atratus; adipokinetic hormone; bioanalog of the AKH hormone family; uncoupling protein of Zophobas atratus; uncoupling proteins, isoforms 1–5