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dc.contributor.authorGhioni, Cristinaen_UK
dc.contributor.authorTocher, Douglas Ren_UK
dc.contributor.authorSargent, John Ren_UK
dc.description.abstractRainbow trout (Oncorhynchus mykiss) skin cell cultures were obtained by trypsinisation of the tissue and grown in Leibovitz L-15 medium. Lipid class compositions, and fatty acid profiles of total lipids and individual phospholipid classes were determined at different times of culture. The metabolism of polyunsaturated fatty acids (PUFA) was investigated by incubating primary cultures after 7 and 14 days with [1-14C]18:2n-6 and [1-14C-]18:3n-3. The change in morphology between epithelial-like primary cultures and fibroblastic-like secondary subcultures was accompanied by alterations in the lipid composition. Polar lipids became predominant by 14 days in culture. The relative proportions of phosphatidylcholine (PC), the most abundant phospholipid, phosphatidylinositol and cholesterol increased significantly, while sphingomyelin decreased. Saturated fatty acids, 18:1n-9, n-6 and n-9PUFA were more abundant in total lipid in cultures at 14 days and 4 months than in cells initially isolated which contained higher percentages of longer chain monoenes and n-3PUFA. The changes in fatty acid composition with time in culture were observed in all the major phospholipid classes. Rainbow trout skin cells in culture desaturated and elongated both 18:2n-6 and 18:3n-3, with 20:4n-6 and 20:5n-3 being the most abundant products, respectively. PC presented the highest incorporation of radioactivity, especially following incubation with 18:3n-3. Lipid metabolism in general increased with the age of primary cultures, with both the amount of C18 PUFA incorporated and metabolised by desaturation/elongation significantly increased in 14 day cultures compared to 7 day cultures. Product/precursor ratios calculated for both n-6 and n-3 fatty acids showed that, while Δ6 desaturase activity was increased significantly with cell age, Δ5 desaturase activity was more affected by the fatty acid series, with 18:3n-3 being more readily transformed to 20:5n-3 than 18:2n-6 to 20:4n-6. Further desaturation of 20:5n-3 to hexaenes was low. Overall, the data suggested that the trout skin cell cultures were more similar to mammalian skin fibroblasts than mammalian epidermal/keratinocyte cultures.en_UK
dc.relationGhioni C, Tocher DR & Sargent JR (1997) The effect of culture on morphology, lipid and fatty acid composition, and polyunsaturated fatty acid metabolism of rainbow trout (Oncorhynchus mykiss) skin cells. Fish Physiology and Biochemistry, 16 (6), pp. 499-513.;
dc.rightsPublished in Fish Physiology and Biochemistry by Springer.; The final publication is available at www.springerlink.comen_UK
dc.subjectRainbow trouten_UK
dc.subjectOncorhynchus mykissen_UK
dc.subjectPrimary cell cultureen_UK
dc.subjectLipid compositionen_UK
dc.subjectFatty acid compositionen_UK
dc.subjectCell growthen_UK
dc.subjectCell morphologyen_UK
dc.subjectRainbow trouten_UK
dc.subjectCell cultureen_UK
dc.titleThe effect of culture on morphology, lipid and fatty acid composition, and polyunsaturated fatty acid metabolism of rainbow trout (Oncorhynchus mykiss) skin cellsen_UK
dc.typeJournal Articleen_UK
dc.citation.jtitleFish Physiology and Biochemistryen_UK
dc.type.statusAM - Accepted Manuscripten_UK
dc.contributor.affiliationUniversity of Stirlingen_UK
dc.contributor.affiliationInstitute of Aquacultureen_UK
dc.contributor.affiliationUniversity of Stirlingen_UK
rioxxterms.typeJournal Article/Reviewen_UK
local.rioxx.authorGhioni, Cristina|en_UK
local.rioxx.authorTocher, Douglas R|0000-0002-8603-9410en_UK
local.rioxx.authorSargent, John R|en_UK
local.rioxx.projectInternal Project|University of Stirling|
local.rioxx.filenameRTS1 Final.pdfen_UK
Appears in Collections:Aquaculture Journal Articles

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