首页> 外文期刊>The Journal of Nutritional Biochemistry >Biophysical and biochemical mechanisms by which dietary N-3 polyunsaturated fatty acids from fish oil disrupt membrane lipid rafts.
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Biophysical and biochemical mechanisms by which dietary N-3 polyunsaturated fatty acids from fish oil disrupt membrane lipid rafts.

机译:鱼油中膳食中的N-3多不饱和脂肪酸破坏膜脂筏的生物物理和生化机制。

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摘要

N-3 polyunsaturated fatty acids (PUFAs) from fish oil exert their functional effects by targeting multiple mechanisms. One mechanism to emerge in the past decade is the ability of n-3 PUFA acyl chains to perturb the molecular organization of plasma membrane sphingolipid/cholesterol-enriched lipid raft domains. These domains are nanometer-scale assemblies that coalesce to compartmentalize select proteins for optimal function. Here we review recent evidence on how n-3 PUFAs modify lipid rafts from biophysical and biochemical experiments from several different model systems. A central theme emerges from these studies. N-3 PUFA acyl chains display tremendous conformational flexibility and a low affinity for cholesterol and saturated acyl chains. This unique flexibility of n-3 PUFA acyl chains impacts the organization of inner and outer leaflet lipid rafts by disrupting acyl chain packing and molecular order within rafts. Ultimately, the disruption in raft organization has consequences for protein clustering and thereby signaling. Overall, elucidating the complex mechanisms by which n-3 PUFA acyl chains reorganize membrane architecture will enhance the translation of these fatty acids into the clinic for treating several diseases.
机译:鱼油中的N-3多不饱和脂肪酸(PUFA)通过靶向多种机制发挥其功能作用。在过去的十年中出现的一种机制是n-3 PUFA酰基链干扰质膜鞘脂/胆固醇富集的脂筏结构域的分子组织的能力。这些结构域是纳米级装配体,它们结合在一起以使选定的蛋白质区分开以实现最佳功能。在这里,我们将从几种不同模型系统的生物物理和生化实验中回顾有关n-3 PUFA如何修饰脂质筏的最新证据。这些研究提出了一个中心主题。 N-3 PUFA酰基链显示出极大的构象柔韧性,并且对胆固醇和饱和酰基链的亲和力很低。 n-3 PUFA酰基链的这种独特灵活性通过破坏筏中的酰基链堆积和分子顺序来影响内部和外部小叶脂质筏的组织。最终,筏组织的破坏对蛋白质聚集并由此发出信号产生了影响。总体而言,阐明n-3 PUFA酰基链重组膜结构的复杂机制将增强这些脂肪酸在临床上的转化,以治疗多种疾病。

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