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相关概念视频

Micelles01:30

Micelles

282
Micelle formation is an intricate process that hinges on the properties of amphiphilic or amphipathic molecules and the conditions of the system in which they are found. Amphiphilic molecules, which have both hydrophilic (water-attracting) and hydrophobic (water-repelling) parts, play a critical role in this process.In aqueous environments, these molecules arrange themselves such that their hydrophilic heads are turned towards the water phase, while their hydrophobic tails are oriented away...
282
Lipids as Anchors01:32

Lipids as Anchors

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In the plasma membrane, the lipids forming the bilayer can also act as an anchor to tether proteins to the membrane. The three main types of lipid anchors found in eukaryotes are – prenyl groups, fatty acyl groups, and glycosylphosphatidylinositol or GPI groups. Prenyl and fatty acyl groups act as anchors on the cytosolic surface of the membrane, whereas GPI anchors proteins on the extracellular side.
The carboxy-terminal of most of the prenylated proteins, such as Ras proteins, contains...
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相关实验视频

Updated: Apr 18, 2026

Preparation, Purification, and Use of Fatty Acid-containing Liposomes
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Preparation, Purification, and Use of Fatty Acid-containing Liposomes

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使用寡核酸头组控制脂质细胞稳定性

Samantha E Wilner1, Samuel E Sparks, David Cowburn

  • 1Department of Biochemistry, Albert Einstein College of Medicine , Bronx, New York 10461, United States.

Journal of the American Chemical Society
|January 31, 2015
PubMed
概括
此摘要是机器生成的。

具有寡核酸延伸的基于脂质的基质基因表现出在血清中增强的稳定性. 这项创新允许控制药物输送和释放,克服了生物流体中菌不稳定性的先前限制.

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科学领域:

  • 纳米技术 纳米技术
  • 生物化学 生物化学
  • 材料科学 材料科学 材料科学

背景情况:

  • 基于脂质的菌因其小尺寸和可溶性增强能力而有望用于药物输送.
  • 由于蛋白质相互作用引起的血清中的微粒不稳定性,限制了它们的治疗应用.
  • 目前的策略难以维持生物环境中的菌根完整性.

研究的目的:

  • 为了设计基于脂质的细胞,在血清中提高稳定性.
  • 调查寡核酸扩展在细胞稳定中的作用.
  • 通过微粒破坏稳定来证明受控的货物释放.

主要方法:

  • 基于脂质的细胞被短,四重复形成的寡核酸延伸功能化.
  • 使用质子核磁共振 (1H NMR) 证实了细胞表面的四重复合形成.
  • 通过随着时间的推移与血清蛋白进行化,评估了米塞尔的稳定性.
  • 货物释放是由使用反意义寡核酸破坏寡核酸四重复结构引发的.

主要成果:

  • 在细胞表面形成的四重复合的寡聚核酸对24小时以上的血清蛋白质诱导的分解具有稳定性.
  • 四重复结构稍微扭曲了菌体形态.
  • 四重体结构的破坏导致了米塞尔的不稳定和随后的货物释放.
  • (1) H NMR 证实了四重复结构的存在和完整性.

结论:

  • 具有寡核酸头组的工程微粒提供了一种稳定血清中脂质纳米颗粒的新策略.
  • 寡核酸相互作用提供了一种外部控制小细胞稳定性和药物释放的机制.
  • 这种方法代表了设计用于治疗和诊断应用的可编程纳米尺寸设备的新范式.