arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1906.01744cond-mat.softphysics.bio-phq-bio.SC
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脂质和表面活性剂预成型囊泡荧光标记技术的设计与应用

Design and applications of a fluorescent labeling technique for lipid and surfactant preformed vesicles

Fanny Mousseau, Jean-François Berret, Evdokia K. Oikonomou

摘要:

两亲分子如表面活性剂、脂质和嵌段共聚物可以组装成双层并形成囊泡。荧光膜标记方法需要使用可以在合成的不同阶段插入双层中的染料分子。据我们所知,没有一种通用的方法来标记预制的囊泡。在这里,我们开发了一个通用的协议,是适合于表面活性剂和脂质预制囊泡,不需要分离或纯化步骤。基于亲脂性碳菁绿染料PKH 67,该方法在两性离子磷脂酰胆碱囊泡上进行评估。为了证明其多功能性,将其应用于阴离子或阳离子囊泡的分散体,例如给予患有呼吸窘迫综合征的早产儿的药物,或用作家庭护理应用的织物柔软剂的囊泡制剂。通过荧光显微镜,我们然后可视化的相互作用机制的纳米粒子穿越活细胞膜和表面活性剂吸附在棉织物上。这些结果突出了膜标记技术的优点,该技术简单且适用于大量的软物质系统。

英文摘要:

Amphiphilic molecules such as surfactants, lipids and block copolymers can be assembled into bilayers and form vesicles. Fluorescent membrane labeling methods require the use of dye molecules that can be inserted in the bilayers at different stages of the synthesis. To our knowledge there is no generalized method for labeling preformed vesicles. Herein we develop a versatile protocol that is suitable to both surfactant and lipid preformed vesicles and requires no separation or purification steps. Based on the lipophilic carbocyanine green dye PKH67, the methodology is assessed on zwitterionic phosphatidylcholine vesicles. To demonstrate its versatility, it is applied to dispersions of anionic or cationic vesicles, such as a drug administrated to premature infants with respiratory distress syndrome, or a vesicle formulation used as a fabric softener for homecare applications. By means of fluorescence microscopy we then visualize the interaction mechanisms of nanoparticles crossing live cell membranes and of surfactant adsorbing on cotton fabric. These results highlight the advantages of a membrane labeling technique that is simple and applicable to a large number of soft matter systems.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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