一种超分辨率和传输电子显微镜相关的方法来研究纳米粒子的细胞内贩运
Teodora Andrian1, Yolanda Muela2, Lidia Delgado2
1Institute for Bioengineering of Catalonia (IBEC), Carrer Baldiri Reixac 15-21, 08024 Barcelona, Spain. l.albertazzi@tue.nl.
Nanoscale
|August 24, 2023
概括
研究人员开发了一种新的显微镜方法来追踪细胞内部的纳米粒子 (NP). 这种技术精确地可视化了NP的位置和分布,改善了药物输送系统的设计.
科学领域:
- 生物医学工程 生物医学工程
- 细胞生物学 细胞生物学
- 纳米技术纳米技术
背景情况:
- 纳米粒子 (NP) 是针对药物输送的关键,但它们的细胞内命运是复杂的.
- 了解NP贩运对于优化药物疗效和安全至关重要.
- 目前的方法缺乏准确性,无法同时定位和量化特定细胞区内的NP.
研究的目的:
- 开发一种相关光电子显微镜 (CLEM) 方法,用于精确的NP细胞内定位.
- 将直接随机光学重建显微镜 (dSTORM) 和传输电子显微镜 (TEM) 结合起来,以增强NP可视化.
- 为了能够详细分析蜂区内的NP贩运情况.
主要方法:
- 使用dSTORM进行光标记NP (PLGA-PEG) 的直接可视化.
- 用于超结构背景和精确的NP分配到细胞区的TEM.
- 追踪了NP在内分泌-溶解体通路上的分布,并评估了诺基因对内分泌逃逸的影响.
主要成果:
- 通过使用CLEM成功地可视化和局部化了单个光NP在细胞区内.
- 随着时间的推移,通过内溶酶体通路追踪NP运动.
- 证明了诺基因对NP细胞内分布的影响,表明内体逃逸.
结论:
- 拟议的CLEM方法在细胞内提供了精确的NP定位和量化.
- 这种技术适用于各种光标记的NP和货物.
- 为设计用于细胞质和核药物输送的先进纳米材料提供了关键的见解.
相关概念视频
Super-resolution Fluorescence Microscopy
7.1K
Super-resolution fluorescence microscopy (SRFM) provides a better resolution than conventional fluorescence microscopy by reducing the point spread function (PSF). PSF is the light intensity distribution from a point that causes it to appear blurred. Due to PSF, each fluorescing point appears bigger than its actual size, and it is the PSF interference of nearby fluorophores that causes the blurred image. Various approaches to achieving higher resolution through SRFM have recently been...
7.1K
Studying the Cytoskeleton
6.3K
The cytoskeletal architecture can be studied using different microscopic and biochemical techniques. Electron microscopy was instrumental in discovering the cytoskeletal architecture around the 1960s, which allowed obtaining structural information at a high-resolution level. However, the sample preparation procedure often limits this ability in biological samples. Several protocols have been developed over the years to optimize sample preparation. In one of the protocols known as rotary...
6.3K


