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Effect of dietary docosahexaenoic acid on lipogenesis and lipolysis in black sea bream,Acanthopagrus schlegeli

Acta Oceanologica Sinica 2007年第1期26卷 112-121页

作者： JI Hong OM Ahamd Daud YOSHIMATSU Takao UMINO Testuya NAKAGAWA Heisuke FURUHASHI Makoto SAKAMOTO Shuichi 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 Marine Finfish Production and Research Center Terengganu 22200 Malaysia Farming System Division National Research Institute of Aquaculture Fisheries Research Agency Mie 516 -0913 Japan Oriental Yeast Co Ltd Chiba 281 -0002 Japan

Hatchery-roared 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 lipegenic and lipelysis enzymes, one-year fish were roared 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 hepatopancroas 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.

关键词： DHA enzyme lipogenesis lipolysis black sea bream

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Triterpene-Enriched Olive Extract as an Immunopotentiator in black sea bream(Acanthopagrus schlegelii)

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Journal of Ocean University of China 2020年第2期19卷 428-438页

作者： RONG Jiahuan HAN Yu ZHA Shanjie TANG Yu SHI Wei GUAN Xiaofan DU Xueying HE Maolong LIU Guangxu College of Animal Science Zhejiang UniversityHangzhou 310058China Innovation Division Lucta(Guangzhou)Flavours Co.Ltd.Guangzhou 510530China

Recently,the use of natural immunopotentiators,such as plant extracts,is predicted to offer high disease-prevention potential in ***,few reports on the immunomodulatory impacts of olive extract(OE)on teleost are ***,the effects of dietary intake of triterpene-enriched OE on black sea bream(Acanthopagrus schlegelii)were investigated in this *** data showed that total blood cell counts,in vivo content of lysozyme,activities of antiprotease and myeloperoxidase,and contents of IL-4 and IL-6 were significantly up-regulated by dietary intake of triterpene-enriched ***,the hampered immune response induced by cadmium exposure was significantly mitigated by the administration of OE as were indicated by partially or completely rescued immune-relating ***,the expressions of immune-related genes encoding NF-κB inhibitor alpha(IkBα),tumor necrosis factorα(TNFα),cyclooxygenase-2(COX-2),and proto-oncogene protein c-fos(FOS)were found to be significantly up-regulated by the dietary intake of *** general,the results suggested that the dietary intake of triterpene-enriched OE has immune enhancing effect in black sea *** effect may be realized by 1)increasing the total counts of diverse blood cells;2)activating nonspecific immune biomolecules;and 3)affecting signaling pathways such as IKK and ERK and subsequently inducing IL-4 and IL-6 biosyntheses.

关键词： black sea bream olive extract immunopotentiator gene expression

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