首页> 外文期刊>The Journal of Nutritional Biochemistry >Divergent effects of a CLA-enriched beef diet on metabolic health in ApoE--/-- and ob/ob mice.
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Divergent effects of a CLA-enriched beef diet on metabolic health in ApoE--/-- and ob/ob mice.

机译:富含CLA的牛肉饮食对ApoE -//-和ob / ob小鼠代谢健康的影响。

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Conjugated linoleic acid (CLA) is found naturally in meat and dairy products, and represents a potential therapeutic functional nutrient. However, given the discrepancies in isomer composition and concentration, controversy surrounds its proposed antidiabetic, antiobesity effects. This study focused on the effects of CLA-enriched beef (composed predominantly of c9, t11-CLA) in two separate models of metabolic disease: proatherosclerotic ApoE--/-- mice and diabetic, leptin-deficient ob/ob mice. Animals were fed CLA-enriched beef for 28 days, and markers of the metabolic syndrome and atherosclerosis were assessed. Comprehensive hepatic transcriptomic analysis was completed to understand divergent metabolic effects of CLA. CLA-enriched beef significantly reduced plasma glucose, insulin, nonesterified fatty acid and triacylglycerol and increased adiponectin levels in ob/ob mice. In contrast, plasma lipid profiles and glucose homeostasis deteriorated and promoted atherosclerosis following the CLA-enriched beef diet in ApoE--/-- mice. Hepatic transcriptomic profiling revealed divergent effects of CLA-enriched beef on insulin signaling and lipogenic pathways, which were adversely affected in ApoE--/-- mice. This study demonstrated clear divergence in the effects of CLA. CLA-enriched beef improved metabolic flexibility in ob/ob mice, resulting in enhanced insulin sensitivity. However, CLA-enriched diet increased expression of lipogenic genes, resulting in inefficient fatty acid storage which increases lipotoxicity in peripheral organs, and led to profound metabolic dysfunction in ApoE--/-- mice. While CLA may have potential health effects, in some circumstances, caution must be exercised in presenting this bioactive lipid as a potential functional food for the treatment of metabolic disease. All rights reserved, Elsevier.
机译:共轭亚油酸(CLA)天然存在于肉和奶制品中,代表潜在的治疗功能营养素。但是,鉴于异构体组成和浓度的差异,围绕其拟议的抗糖尿病,抗肥胖作用的争论一直围绕着。这项研究集中于富含CLA的牛肉(主要由c9,t11-CLA组成)在两种新陈代谢疾病模型中的作用:动脉粥样硬化ApoE -/-小鼠和糖尿病,瘦素缺乏症ob / ob小鼠。给动物饲喂富含CLA的牛肉28天,并评估代谢综合征和动脉粥样硬化的标志物。全面的肝转录组分析已完成,以了解CLA的不同代谢作用。富含CLA的牛肉可显着降低ob / ob小鼠的血浆葡萄糖,胰岛素,非酯化脂肪酸和三酰基甘油,并增加脂联素水平。相反,在富含CLA的牛肉饮食下,ApoE -/-小鼠的血浆脂质分布和葡萄糖稳态下降并促进了动脉粥样硬化。肝转录组谱分析表明,富含CLA的牛肉对胰岛素信号传导和脂肪形成途径的影响不同,这在ApoE -/-小鼠中受到不利影响。这项研究表明CLA的效果存在明显差异。富含CLA的牛肉改善了ob / ob小鼠的代谢灵活性,从而增强了胰岛素敏感性。但是,富含CLA的饮食会增加脂肪生成基因的表达,导致脂肪酸储存效率低下,从而增加外周器官的脂毒性,并导致ApoE -/-小鼠发生严重的代谢功能障碍。虽然CLA可能对健康有潜在的影响,但在某些情况下,在将这种生物活性脂质作为治疗代谢性疾病的潜在功能性食品时,必须谨慎行事。保留所有权利,Elsevier。

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