| JI Hong,OM Ahamd Daud,YOSHIMATSU Takao,UMINO Testuya,NAKAGAWA Heisuke,FURUHASHI Makoto,SAKAMOTO Shuichi. 2007. Effect of dietary docosahexaenoic acid on lipogenesis and lipolysis in black sea bream, Acanthopagrus schlegeli. Acta Oceanologica Sinica, (1):112－121 |
| Effect of dietary docosahexaenoic acid on lipogenesis and lipolysis in black sea bream, Acanthopagrus schlegeli |
| Effect of dietary docosahexaenoic acid on lipogenesis and lipolysis in black sea bream, Acanthopagrus schlegeli |
| Received:March 02, 2006 Revised:August 07, 2006 |
| DOI： |
| Key words:DHA enzyme lipogenesis lipolysis black sea bream |
| 中文关键词: DHA enzyme lipogenesis lipolysis black sea bream |
| 基金项目: |
| Author Name | Affiliation | E-mail | | JI Hong | College of Animal Science and Technology, Northwest Agriculture and Forestry University, Shaanxi 712100, China
Graduate School of Biosphere Science, Hiroshima University, Higashi-hiroshima 739-8528, Japan | jihong0405@hotmail.com | | OM Ahamd Daud | Graduate School of Biosphere Science, Hiroshima University, Higashi-hiroshima 739-8528, Japan
Marine Finfish Production and Research Center, Terengganu 22200, Malaysia | | | YOSHIMATSU Takao | Farming System Division, National Research Institute of Aquaculture, Fisheries Research Agency, Mie 516-0913, Japan | | | UMINO Testuya | Graduate School of Biosphere Science, Hiroshima University, Higashi-hiroshima 739-8528, Japan | | | NAKAGAWA Heisuke | Graduate School of Biosphere Science, Hiroshima University, Higashi-hiroshima 739-8528, Japan | | | FURUHASHI Makoto | Oriental Yeast Co Ltd, Chiba 281-0002, Japan | | | SAKAMOTO Shuichi | Oriental Yeast Co Ltd, Chiba 281-0002, Japan | |
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| Abstract: |
| Hatchery-reared juvenile black sea breams are characterized by a low level of highly unsaturated fatty acids in their bodies, as compared with wild fish.To assess the effect of docosahaxaenoic acid (DHA) on lipogenic and lipolysis enzymes, one-year fish were reared on a casein-based purified diet and a DHA fortified diet (1.5% DHA ethyl ester/kg diet) for 60 d, followed with a period of 55 d for starvation.Dietary DHA was effectively incorporated into the fish body.Fortification of DHA depressed activities of glucose-6-phosphate dehydrogenase and NADP-isocitrate dehydrogenase as lipogenic enzymes in the hepatopancreas and intraperitoneal fat body.Carnitine palmitoyltransferase as lipolysis enzyme in the hepatopancreas was active in the DHA fortified fish.Starvation after feeding experiment induced increased carnitine palmitoyltransferase activity in both control and DHA fortified fish and the activity remained higher in the DHA fortified fish, while the monoenes were selectively consumed prior to highly unsaturated fatty acids.These results indicated that dietary DHA depressed lipogenesis and activated lipolysis. |
| 中文摘要: |
| Hatchery-reared juvenile black sea breams are characterized by a low level of highly unsaturated fatty acids in their bodies, as compared with wild fish.To assess the effect of docosahaxaenoic acid (DHA) on lipogenic and lipolysis enzymes, one-year fish were reared on a casein-based purified diet and a DHA fortified diet (1.5% DHA ethyl ester/kg diet) for 60 d, followed with a period of 55 d for starvation.Dietary DHA was effectively incorporated into the fish body.Fortification of DHA depressed activities of glucose-6-phosphate dehydrogenase and NADP-isocitrate dehydrogenase as lipogenic enzymes in the hepatopancreas and intraperitoneal fat body.Carnitine palmitoyltransferase as lipolysis enzyme in the hepatopancreas was active in the DHA fortified fish.Starvation after feeding experiment induced increased carnitine palmitoyltransferase activity in both control and DHA fortified fish and the activity remained higher in the DHA fortified fish, while the monoenes were selectively consumed prior to highly unsaturated fatty acids.These results indicated that dietary DHA depressed lipogenesis and activated lipolysis. |
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