Dr.Miriam Vos and public health nurse Jean Welsh at Emory University collaborated in a study that shows eating a lot of sugar can increase your cholesterol and triglycerides which make up body fat also known as lipids.

VOA: standard.2010.04.25

So most of the lipids, which make up cell membranes in your body are of this category of phospholipids.

大部分脂类,那些在你体内构成细胞膜的脂类,都属于磷脂类

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Well, one way you can get it is by mixing the gene with lipids, with lipid molecules.

一种方法可以将基因与脂质体混合,同脂类分子混合

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Lipids are really complex molecules on their own right, but because of their particular kind of complexity they allow certain biological structures to form.

脂类本身是非常复杂的分子,但正是它们独特的复杂性,使它们能够形成某些生物结构

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The lipids will form a bi-layer where the water soluble part of the lipid points out of this layer and the oily part points in.

脂质会形成双层膜,水溶性部分朝向膜层外,而脂溶性的部分朝向双层膜内部

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I'll talk about biological membranes and lipids and how they're assembled.

我会讲到生物膜和脂质,及它们是如何组装成质膜的

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Special lipids that do this are called cationic lipids.

比如说阳离子脂质体

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Well instead of forming droplets like fat they arrange in a very particular way, they form these structures that are called self-assembled structures because they occur naturally, because of properties of the lipids.

它们不是像脂肪一样形成液滴,而会细致地排列起来,它们形成的结构名为,自组装结构,因为它们能够自然生成,这归功于这种脂质的特性

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I do want to talk about one important subject which you might not have thought too much about and that's lipids, because lipids are so important to the structure of the body because they make up the membranes that form the cells that are the fundamental units.

我的确想要讨论一个重要的主题,这个主题也许你们都没有深入思考过,那就是关于脂类的问题,脂类对身体结构形成十分重要,它是组成细胞膜的基本单位,而细胞膜能够维持细胞形态

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I talked about just not using viruses but using plasmid DNA together with lipids and that's another strategy for gene therapy.

这一部分我们不仅讲了病毒的应用,也讲了利用脂质体包裹的质粒DNA,基因治疗还有其它的策略

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They're lipids but they also have a charged portion, a positively charged portion which interacts with DNA.

它虽然是脂类,但一部分带有电荷,其带有的正电荷将与DNA产生静电作用

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So you form DNA lipid complexes and because the DNA is complexed with lipids it's more soluble in membranes and more likely to enter cells.

形成DNA脂类复合体之后,因DNA同脂类复合,其脂溶性大大增加,更容易进入细胞

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