概括
磁性氧化铁颗粒在活体动物中非侵入性地跟踪器官细胞运动. 这种方法使用在肝细胞内注射的Fe2O3颗粒来测量放松时间,揭示器官细胞运动动态.
科学领域:
- 生物物理学的生物物理.
- 细胞生物学 细胞生物学
- 医疗成像医学成像
背景情况:
- 之前的研究利用磁粒子进行了体外细胞质粘度测量.
- 在体内评估细胞内动态的非侵入性方法是有限的.
研究的目的:
- 开发和验证一种非侵入性技术,用于估计完整动物肝脏巨细胞内的器官运动.
- 为此目的利用磁性铁 (III) 氧化物 (Fe2O3) 纳米粒子.
主要方法:
- 在子体内静脉注射Fe2O3纳米颗粒,导致肝脏巨细胞的细胞化.
- 应用外部磁场来磁化和调整纳米粒子.
- 在移除磁场后,测量身体表面的衰变残余磁场.
主要成果:
- Fe2O3纳米颗粒被肝脏巨细胞成功细胞化.
- 剩余磁场的衰变速度与粒子放松相关.
- 这种放松归因于含有纳米粒子的有机细胞 (体,溶体) 的旋转运动.
结论:
- 磁性Fe2O3颗粒提供了一种非侵入性的方法来评估体内器官运动.
- 该技术允许估计肝细胞巨细胞内的细胞内动力学.
- 这种方法为研究生物体细胞力学提供了一个新的工具.
相关概念视频
01:33Proteomics
A proteome is the entire set of proteins that a cell type produces. We can study proteomes using the knowledge of genomes because genes code for mRNAs, and the mRNAs encode proteins. Although mRNA analysis is a step in the right direction, not all mRNAs are translated into proteins.
Proteomics is the study of proteomes' function. It involves the large-scale systematic study of the proteome to denote the protein complement expressed by a genome. Scientist Mark Wilkins coined the term proteomics...
Proteomics is the study of proteomes' function. It involves the large-scale systematic study of the proteome to denote the protein complement expressed by a genome. Scientist Mark Wilkins coined the term proteomics...
01:24Magnetic Resonance Imaging
Magnetic resonance imaging (MRI) is a noninvasive medical imaging technique based on a phenomenon of nuclear physics discovered in the 1930s, in which matter exposed to magnetic fields and radio waves was found to emit radio signals. In 1970, a physician and researcher named Raymond Damadian noticed that malignant (cancerous) tissue gave off different signals than normal body tissue. He applied for a patent for the first MRI scanning device in clinical use by the early 1980s. The early MRI...