具有较低cmc的可分化阴离子洗剂将等离子体DNA凝结成纳米粒子,并在培养物中转移细胞
E Dauty1, J S Remy, T Blessing
1Laboratoire de Chimie Génétique associé CNRS/Université Louis Pasteur de Strasbourg, Faculté de Pharmacie BP 24, 67401 Illkirch, France.
Journal of the American Chemical Society
|September 20, 2001
概括
研究人员开发了新型的阴离子醇清洁剂,以创建紧,稳定的DNA纳米粒子,以有效地传递基因. 这些35nm粒子显示出增强体内扩散和细胞吸收的前景.
科学领域:
- 生物技术和纳米医学
- 基因治疗和药物输送
背景情况:
- 凝聚的DNA颗粒的大小极大地影响了它们的体内扩散和基因传递到细胞中的效率.
- 阴离子醇洗剂提供了一种将基因分子压缩成纳米粒子的方法,随后通过氧化转化稳定到双子脂质.
研究的目的:
- 为了合成和表征一系列具有不同链长和DNA紧缩的头组的阴离子醇洗剂.
- 评估DNA纳米粒子复合物的特性,包括大小,稳定性和转染效率,用于基因传递应用.
主要方法:
- 采用聚合物支持的合成策略,制备阴性硫醇洗剂 (C12-C16链长,鸟类素或精子素头组).
- 鉴定包括测量关键的微粒度,硫醇氧化率,以及分析DNA复合物形成,大小,泽塔潜力,形态和转染效率.
- 使用四度甘/甲基因洗剂进行等离子体DNA (5.5 Kpb) 紧缩的特殊研究.
主要成果:
- 甲基/甲基因洗剂成功地将等离子体DNA转化为均的35nm粒子.
- 氧化洗剂形成了具有类似脂质的内部结构的颗粒,证明了有效的细胞转染能力.
- 随着时间的推移,粒子大小保持稳定,DNA复合体表现出比裸体等离子体DNA更高的凝电泳流动性.
结论:
- 新型阴离子醇洗剂使得稳定,小的DNA纳米颗粒能够形成,适合用于基因传递.
- 由此产生的双子体脂稳定纳米颗粒具有有利于有效基因传递的特性.
- 观察到的特性表明这些DNA复合体在体内扩散和细胞内贩运是有利的.
相关概念视频
DNA Isolation
DNA from cells is required for many biotechnology and research applications, such as molecular cloning. To remove and purify DNA from cells, researchers use various methods of DNA extraction. While the specifics of different protocols may vary, some general concepts underlie the process of DNA extraction.
DNA Isolation
DNA isolation protocols can be fast and straightforward or complex and time-consuming depending on the type and quality of DNA required for further processing. For example, plasmid DNA extraction is a bit more complicated than genomic DNA extraction because of the need for an appropriate lysis method to separate plasmid DNA from gDNA during isolation. However, for specific applications, such as long-range DNA sequencing that require a good yield of high- quality DNA samples, we need to follow...
Overview Of Cell Separation And Isolation
Cell separation was first achieved in 1964 by S. H. Seal, who separated large tumor cells from the smaller blood cells using filtration. Two years later, Pohl and Hawk performed experiments on how cells respond differently to a nonuniform electric field based on the cell type. Such observations were the inception of cell separation methods, which allow isolating a single cell type from a heterogeneous sample.


