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首页> 外文期刊>The Journal of Experimental Biology >The under-appreciated fats of life: the two types of polyunsaturated fats
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The under-appreciated fats of life: the two types of polyunsaturated fats

机译:植物的不受欢迎的脂肪:两种类型的多不饱和脂肪

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There are two types of polyunsaturated fatty acids (i.e. fats that contain multiple carbon-carbon double bonds) - omega-6 and omega-3. They are not interconvertible, and they contribute 'double-bonded carbons' to different depths in bilayer membranes, with different effects on membrane processes. This Commentary emphasises the importance of these fats for biological membrane function and examines their evolution and biochemistry. Omega-6 and omega-3 fatty acids are separately essential in the diet of animals, and they pass up the food chain largely from plants, with 'seeds' being a prevalent source of omega-6, and 'leaves' a prevalent source of omega-3. The dietary balance between these fatty acids has a strong influence on membrane composition. Although this aspect of diet has been little investigated outside of the biomedical field, emerging evidence shows it can alter important physiological capacities of animals (e.g. exercise endurance and adiposity), which has implications for activities such as avian migration and hibernation and torpor, as well as significant implications for human health. This Commentary will focus on the separate effects of omega-3 and omega-6 on membrane properties and will emphasise the importance of the balance between these two fatty acids in determining the function of biological membranes; I hope to convince the reader that fats should be considered first and foremost as the basic unit of biological membranes, and secondarily as a means of energy storage.
机译:有两种类型的多不饱和脂肪酸(即含有多个碳-碳双键的脂肪)——ω-6和ω-3。它们不可相互转换,它们在双层膜的不同深度形成“双键碳”,对膜过程产生不同的影响。这篇评论强调了这些脂肪对生物膜功能的重要性,并研究了它们的进化和生物化学。ω-6和ω-3脂肪酸在动物的饮食中分别是必不可少的,它们在食物链上的传递主要来自植物,其中“种子”是ω-6的主要来源,“叶子”是ω-3的主要来源。这些脂肪酸之间的饮食平衡对膜组成有很大影响。尽管在生物医学领域之外,对饮食的这一方面的研究很少,但新的证据表明,饮食可以改变动物的重要生理能力(例如运动耐力和肥胖),这对鸟类迁徙、冬眠和迟钝等活动有影响,对人类健康也有重大影响。本评论将集中于ω-3和ω-6对膜性质的单独影响,并将强调这两种脂肪酸之间的平衡在确定生物膜功能中的重要性;我希望让读者相信,脂肪首先应该被视为生物膜的基本单位,其次是作为一种能量储存手段。

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