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Changes of Fatty Acid Compositions in Hepatic Total Lipids and Phospholipids of Rats Supplemented with Cholesterol and Taurine
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콜레스테롤과 타우린보강이 흰쥐 간의 총지방산 및 인지질지방산 조성에 미치는 영향

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Academic journal
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Journal
The korean Society of Food Science and Nutrition Journal of the Korean Society of Food Science and Nutrition Vol.27 No.6 KCI Accredited Journals SCOPUS
Published
1999.1
Pages
1,253 - 1,261 (9page)

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Changes of Fatty Acid Compositions in Hepatic Total Lipids and Phospholipids of Rats Supplemented with Cholesterol and Taurine
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Effects of dietary cholesterol and taurine supplementation on hepatic total and phospholipid fatty acid compositions were evaluated in rats fed one of the following semisynthetic diets for 5 weeks : control diet(CD, cholesterol-free and taurine-free diet); high cholesterol diet(HCD, CD+1.5% cholesterol); high cholesterol, high taurine diet(HCHTD, HCD+1.5% taurine). Diet-induced changes in hepatic total fatty acid compositions were very similar to those in hepatic phospholipid fatty acid compositions. The HCD significantly decreased the percentage of total saturated fatty acids(SFA), and increased the percentage of total monounsaturated fatty acids(MUFA) of hepatic total lipids and phospholipids as compared to the values for the control rats(p<0.001). HCHTD significantly elevated the percentage of ΣSFA and lowered the percentage of ΣMUFA compared to the values for the HCD(p<0.001). Percentages of hepatic total and phospholipid 18 : 3ω3, 20 : 5ω3, 18 : 2ω6 and 20 : 3ω6 were significantly higher in rats fed the HCD than the values for the control rats, and the percentages of their elongation and de saturation products(22 : 5ω3, 22 : 6ω3, 20: 4ω6, 221 : 4ω6 and 22 : 5ω6) were significantly lower in rats fed the HCD compared to those for the control rats. HCD significantly lowered the △5 desaturation(20 : 3ω6⇒20 : 4ω6) and △4 desaturation(22 : 4ω6⇒22 : 5ω6) indices, and the elongation index of ω3 fatty acid(20 : 5 ω3⇒22 : 5ω3) in rat liver. HCHTD reversed the cholesterol-induced changes in the compositions of ω3 and ω6 fatty acids. These results suggest the possibility that dietary cholesterol and taurine supplementations affect plasma and liver lipid levels, at least in part, by changing the hepatic phospholipid fatty acid compositions and thereby modulating the physical characteristics of the membrane and the activities of microsomal enzymes involved in lipid metabolism.

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UCI(KEPA) : I410-ECN-0101-2009-511-018107949