Suppr超能文献

形成载药脂质体作为药物传递载体。

Formation of eLiposomes as a drug delivery vehicle.

机构信息

Chemical Engineering Department, Brigham Young University, Provo, UT 84602, USA.

出版信息

Colloids Surf B Biointerfaces. 2012 Jan 1;89:93-100. doi: 10.1016/j.colsurfb.2011.08.030. Epub 2011 Sep 14.

Abstract

This paper discusses the formation of eLiposomes, defined as a liposome with internal emulsion droplets. Liposomes have been investigated as passively targeted drug carriers due to their ability to deliver drugs to a cancerous tumor via the enhanced permeability and retention (EPR) effect. The enclosed emulsion droplets in an eLiposome add the ability to further control the location and time of release from the liposome with ultrasound. Emulsion droplets were formed from perfluorohexane (PFC6) by sonication at 20 kHz and stabilized with dipalmitoyl phosphatidyl choline (DPPC). The size of the resulting droplets was reduced to approximately 100 nm or 50 nm by extrusion through polycarbonate filters of the same size at 50°C. Small unilamellar vesicles (SUVs) were prepared from DPPC by thin film hydration and extrusion through a 50 nm filter. Interdigitated DPPC sheets were prepared from the SUVs by the addition of ethanol to a concentration of 3M. Excess ethanol was removed by centrifugation washing. The sheets were mixed with emulsion and the solution was heated to 50°C, resulting in the refolding of the DPPC sheets into closed vesicles. Emulsion droplets were encapsulated inside of the newly formed eLiposomes. The size of the eLiposomes was reduced by extrusion. Cryogenic transmission electron microscopy (cryoTEM) and negative-staining TEM were used to image the emulsion droplets and the eLiposomes. Encapsulation of emulsion droplets was verified by rotating the microscope stage of cryoTEM samples.

摘要

本文讨论了 eLiposomes 的形成,eLiposomes 被定义为内部乳液液滴的脂质体。由于脂质体能够通过增强的通透性和保留(EPR)效应将药物递送到癌性肿瘤,因此它们被研究为被动靶向药物载体。eLiposome 中封闭的乳液液滴增加了通过超声进一步控制从脂质体释放的位置和时间的能力。乳液液滴是通过在 20 kHz 下超声处理全氟己烷(PFC6)形成的,并通过二棕榈酰磷脂酰胆碱(DPPC)稳定。通过在 50°C 下用相同尺寸的聚碳酸酯过滤器挤出,所得液滴的尺寸减小至约 100nm 或 50nm。从小单室囊泡(SUVs)通过 DPPC 的薄膜水合和通过 50nm 过滤器挤出制备 DPPC。通过向 SUV 添加乙醇至 3M 的浓度来制备交错 DPPC 片。通过离心洗涤除去过量的乙醇。将片材与乳液混合,将溶液加热至 50°C,导致 DPPC 片材重新折叠成封闭的囊泡。乳液液滴被包裹在新形成的 eLiposomes 内部。通过挤出减小 eLiposomes 的尺寸。使用低温传输电子显微镜(cryoTEM)和负染色 TEM 来对乳液液滴和 eLiposomes 进行成像。通过旋转 cryoTEM 样品的显微镜台来验证乳液液滴的封装。

文献AI研究员

20分钟写一篇综述,助力文献阅读效率提升50倍。

立即体验

用中文搜PubMed

大模型驱动的PubMed中文搜索引擎

马上搜索

文档翻译

学术文献翻译模型,支持多种主流文档格式。

立即体验