cDICE method produces giant lipid vesicles under physiological conditions of charged lipids and ionic solutions.

cDICE method produces giant lipid vesicles under physiological conditions of charged lipids and ionic solutions.
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DOI:
10.1039/c6sm00868b
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发表时间:
2016-09-21
期刊:
影响因子:
3.4
通讯作者:
Keller SL
Keller SL
中科院分区:
化学2区
文献类型:
--
作者:
Blosser MC;Horst BG;Keller SL

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巨型单层囊泡是脂质膜生物物理研究中常用的有力工具。在这里,我们评估了最近引入的一种囊泡形成方法,“连续液滴界面交叉封装”(cDICE)。该方法使用现成的仪器,生产出大小可控、封装效率高的单分散巨型单层囊泡。我们发现,由cDICE生产的囊泡膜内的磷脂混合物与由互补技术形成的囊泡中的脂质在相同的特征温度下进行相分离。我们发现cDICE方法在由带电荷的脂质产生囊泡和周围缓冲液含有高浓度盐时都是有效的。该技术的一个缺点是胆固醇不能完全融入囊泡膜。
Giant unilamellar vesicles are a powerful and common tool employed in biophysical studies of lipid membranes. Here we evaluate a recently introduced method of vesicle formation, “continuous droplet interface crossing encapsulation” (cDICE). This method produces mondisperse giant unilamellar vesicles of controlled sizes and high encapsulation efficiencies, using readily available instrumentation. We find that mixtures of phospholipids within vesicle membranes produced by cDICE undergo phase separation at the same characteristic temperatures as lipids in vesicles formed by a complementary technique. We find that the cDICE method is effective both when vesicles are produced from charged lipids and when the surrounding buffer contains a high concentration of salt. A shortcoming of the technique is that cholesterol is not substantially incorporated into vesicle membranes.
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