Effects of Highly Purified Structured Lipids Containing Medium-chain Fatty Acids and Linoleic Acid on Lipid Profiles in Rats
作者:Jun-ichi NAGATA、Michio KASAI、Souichiro WATANABE、Ikuo IKEDA、Morio SAITO
DOI:10.1271/bbb.67.1937
日期:2003.1
The purpose of this study is to examine the effects of highly purified structured lipids on serum and liver lipid profiles in rats. We also investigated in vitro hydrolysis of lipid emulsions by porcine pancreas. Hydrolysis rates of medium chain (M)-linoleic (L)-medium chain (M) types were 2 to 3 times higher than those of L-M-L types. The diet containing structured lipids or corn oil was administered to rats for 4 weeks. There were no significant differences in growth and food efficiency. Serum cholesterol levels were significantly lower (P<0.05) in the 2-octanoyl-1,3-dilinoleoyl-glycerol, 2-linoleoyl-1,3-didecanoyl-glycerol, and 2-decanoyl-1,3-dilinoleoyl-glycerol groups than in the corn-oil group. Serum triglyceride levels were significantly lower (P<0.05) in rats fed L-M-L types than those in the other groups. Serum non-esterified fatty acid (NEFA) and β-hydroxybutylate levels were significantly higher (P<0.01) in rats fed M-L-M types than those of the other groups. These results indicate that the feeding of highly purified L-M-L types could effectively improve serum and liver lipid profiles and that M-L-M types may be a preferable substrate for the pancreas and contribute to energy supply in rats.
本研究的目的是检查高度纯化的结构化脂质对大鼠血清和肝脏脂质谱的影响。我们还研究了猪胰腺对脂肪乳剂的体外水解。中链(M)-亚油酸(L)-中链(M)类型的水解率比L-M-L类型高2至3倍。给大鼠喂食含有结构化脂质或玉米油的饮食 4 周。生长和粮食效率没有显着差异。 2-辛酰基-1,3-二亚油酰基-甘油、2-亚油酰基-1,3-二癸酰基-甘油和2-癸酰基-1,3-二亚油酰基-甘油组的血清胆固醇水平显着降低(P<0.05)比玉米油组。 L-M-L型喂养的大鼠血清甘油三酯水平显着低于其他组(P<0.05)。 M-L-M型喂养的大鼠血清非酯化脂肪酸(NEFA)和β-羟基丁酸酯水平显着高于其他组(P<0.01)。这些结果表明,喂养高度纯化的L-M-L类型可以有效改善血清和肝脏脂质谱,并且M-L-M类型可能是胰腺的优选底物,并有助于大鼠的能量供应。