Control of hexose phosphate and citrate in fat body of the cockroach (Periplaneta americana) by the corpus cardiacum |
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| Affiliation: | 1. Bar-Ilan University, Faculty of Engineering, 5290002 Ramat-Gan, Israel;2. KU Leuven, Department of Electrical Engineering (ESAT), Stadius Center for Dynamical Systems, Signal Processing and Data Analytics, Kasteelpark Arenberg 10, 3001 Leuven, Belgium;1. Department of Animal Science, Stellenbosch University, Private Bag X1, Matieland, 7602, South Africa;2. Fisheries Management Branch, Department of Agriculture, Forestry and Fisheries, Roggebaai, 8012, South Africa;3. Centre for Nutrition and Food Sciences, Queensland Alliance for Agriculture and Food Innovation (QAAFI), The University of Queensland, Health and Food Sciences Precinct, 39 Kessels Rd, Coopers Plains 4108, Australia;1. Department of Biochemistry and Molecular and Cellular Biology, Georgetown University School of Medicine, Washington, DC, USA;2. Firefighters'' Burn and Surgical Research Laboratory, MedStar Health Research Institute, Washington, DC, USA;3. The Burn Center, Department of Surgery, MedStar Washington Hospital Center, Washington, DC, USA;4. Department of Surgery, Georgetown University School of Medicine, Washington, DC, USA |
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| Abstract: | 1. Fat body of the American coackroach (Periplaneta americana) treated with CC extract (0.01 gland equivalents per ml) releases approximately 100% more trehalose into physiological saline in 1 hr than paired tissue controls.2. The rate is highest during the first 5 min and thereafter declines.3. Phosphorylaseactivity in CC treated fat body is more than double that in control tissues, the difference being maintained throughout the entire period of incubation.4. G-6-P, the product of glycogenolysis and substrate for trehalose synthesis, increases more than 100% in fat body treated with CC extract.5. The concentration of F-6-P also rises by the same percentage after treatment with CC extract but that of F-1, 6-bisP increases by not more than 50%.6. Within 5 min after treatment with CC extract the concentration of citrate doubles, rising to 3-fold that in the controls after 30 min.7. The data suggest that the CC play an important role in the coupling of carbohydrate metabolism to lipolysis. |
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