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Structure and cardioprotective activities of polar lipids of olive pomace,olive pomace-enriched fish feed and olive pomace fed gilthead sea bream (Sparus aurata)
Affiliation:1. Laboratory of Food Chemistry, Faculty of Chemistry, National and Kapodistrian University of Athens, Athens 15771, Greece;2. Biomedical Sciences Research Complex, School of Biology, The North Haugh, The University, St. Andrews, Fife, KY16 9ST, Scotland, UK;3. Laboratory of Biochemistry, Faculty of Chemistry, School of Sciences, National and Kapodistrian University of Athens, Athens 15771, Greece;4. Department of Life Sciences, University of Limerick, Limerick, Ireland;1. Department of Food and Resource Economics, University of Copenhagen, Rolighedsvej 25, DK-1958 Frederiksberg, Denmark;2. Biomar A/S, Myl Erichsensvej 35, DK-7330 Brande, Denmark;3. Danish Crown, Marsvej 43, DK-8960 Randers, Denmark
Abstract:Total lipids of olive pomace (OP), olive pomace diet (OP diet), fish oil diet (FO diet) and fish filets of farmed gilthead sea bream (fish fed with FO diet and OP diet respectively) were extracted and separated into polar (TPL) and neutral (TNL) lipids. All samples were assessed for their in vitro activity against washed rabbit platelets aggregation induced by platelet activating factor (PAF) and they were further analyzed by electrospray-mass spectrometry. The high levels of palmitic (16:0), oleic (18:1 cis ω ? 9), linoleic (18:2 ω ? 6) and docosapentaenoic acid (DPA 22:5 ω ? 3) contained in both OP and FO diets are reflected to the gilthead sea breams fed with the individual diet respectively, while the gilthead sea bream fed with FO diet displays a decrease in DPA. All samples contained various glycerophospholipids species. Two PE species were identified in OP, OP diet and fish fed with OP diet and not in FO diet, while that might be an indication that these substances are likely to be the key polar phospholipids that have the ability to be in vitro PAF inhibitors, i.e. inhibit the formation of atherosclerotic plaques in blood arteries.
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