Wydział Chemii

Małgorzata Słocińska

Nina Antos-Krzeminska

Marek Golebiowski

Mariola Kuczer

Piotr Stepnowski

Grzegorz Rosiński

Wiesława Jarmuszkiewicz

2013

Comparative Biochemistry and Physiology A-Molecular and Integrative Physiology

166

52-59

10.1016/j.cbpa.2013.05.009

Naukowa

Angielski

Artykuł

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.

Adipocinetic hormone, Larva, Pupa, fat body, UCP4, Zophobas atratus

http://dx.doi.org/10.1016/j.cbpa.2013.05.009

http://www.elsevier.com