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Physiological effects of an oil rich in γ-linolenic acid on hepatic fatty acid oxidation and serum lipid levels in genetically hyperlipidemic mice

机译:富含γ-亚麻酸的油对遗传性高脂血症小鼠肝脂肪酸氧化和血脂水平的生理影响

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摘要

We investigated the physiological activity of an oil rich in γ-linolenic acid of evening primrose origin (containing 42.6% γ-linolenic acid) affecting hepatic fatty acid metabolism, and serum lipid levels in genetically hyperlipidemic mice deficient in apolipoprotein E expression. Male apolipoprotein E-deficient mice (BALB/c.KOR/StmSlc-Apoeshl) were fed experimental diets containing 100 g/kg of palm oil (saturated fat), safflower oil (rich in linoleic acid), γ-linolenic acid oil (rich in γ-linolenic acid), or fat mixtures composed of safflower and γ-linolenic acid oils (65:35 and 30:70, w/w) for 20 days. γ-Linolenic acid oil, compared with palm and safflower oils, strongly and dose-dependently increased the activity and mRNA levels of hepatic fatty acid oxidation enzymes. In general, safflower and γ-linolenic acid oils, compared with palm oil, reduced the activity and mRNA levels of lipogenic enzymes. However, these oils were equivalent in reducing the parameters of lipogenesis, excluding malic enzyme and pyruvate kinase. The diets containing safflower and γ-linolenic acid oils, compared with the palm oil diet, significantly decreased serum triacylglycerol and cholesterol levels. The decreases were greater with γ-linolenic acid oil than with safflower oil. γ-Linolenic acid oil exerted strong serum lipid-lowering effects in apolipoprotein E-deficient mice apparently through the changes in hepatic fatty acid metabolism.
机译:我们调查了富含月见草来源的γ-亚麻酸(含42.6%γ-亚麻酸)的油对肝脏脂肪酸代谢的影响以及缺乏载脂蛋白E表达的遗传性高脂血症小鼠的血脂水平的生理活性。给雄性载脂蛋白E缺乏症小鼠(BALB / c.KOR / StmSlc-Apoe shl )喂食实验饮食,其中包含100 g / kg的棕榈油(饱和脂肪),红花油(富含亚油酸) ,γ-亚麻酸油(富含γ-亚麻酸)或由红花油和γ-亚麻酸油(65:35和30:70,w / w)组成的脂肪混合物20天。与棕榈油和红花油相比,γ-亚麻酸油强烈且剂量依赖性地增加了肝脂肪酸氧化酶的活性和mRNA水平。通常,与棕榈油相比,红花油和γ-亚麻酸油会降低脂肪酶的活性和mRNA水平。但是,这些油在减少脂肪生成参数方面是等效的,但苹果酸酶和丙酮酸激酶除外。与棕榈油饮食相比,含红花油和γ-亚麻酸油的饮食显着降低了血清三酰甘油和胆固醇水平。 γ-亚麻酸油的减少幅度大于红花油。 γ-亚麻油酸油显然通过肝脏脂肪酸代谢的变化在载脂蛋白E缺乏症小鼠中具有强大的降血脂作用。

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