通过深度学习辅助的X射线纳米计算机断层扫描对单细胞中的HfO2纳米粒子进行量化三维成像分析
Zuoxin Xi1,2, Haodong Yao1,3, Tingfeng Zhang1,3
1Multi-disciplinary Research Division, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China.
ACS nano
|August 8, 2024
概括
我们开发了一种用于X射线纳米计算机断层扫描 (Nano-CT) 的自动化深度学习方法,以精确量化癌细胞内的超微小纳米粒子,改进药物分布分析.
科学领域:
- 纳米医学是一种纳米医学.
- 医疗成像医学成像
- 癌症研究 癌症研究
背景情况:
- 在纳米级单细胞中量化3D药物分布对于理解药物机制至关重要,但在分辨率,灵敏度和重建方面面临挑战.
- X射线纳米计算机断层扫描 (Nano-CT) 首选用于观察细胞药物分布,但耗时,需要专业知识,并且可能是主观的,特别是对超小金属纳米粒子 (NP).
- 对于超小NP的传统批量数据分析缺乏准确性.
研究的目的:
- 开发一种模块化和自动化深度学习辅助的纳米CT方法,用于对超小金属NP局部化和癌细胞吸收的定量分析.
- 在单细胞的3D纳米CT图像中建立超小物体的细分方法,使微小和超小NP的敏感分析成为可能.
- 创建一个局部定量分析方法,用于准确细分细胞内可生物利用的颗粒.
主要方法:
- 使用放射增强剂超小的二氧化 (HfO2) 纳米粒子作为模型系统.
- 开发了一个与Nano-CT集成的深度学习算法,用于自动化图像分析.
- 为3D纳米-CT数据建立了新的细分和本地化定量分析方法.
主要成果:
- 通过使用3D纳米CT,展示了一种高度敏感的方法来分析单细胞内的微小和超微小NP.
- 从细胞外和其他细胞内成分精确细分的细胞内生物利用的HfO2NP.
- 揭示了人类乳腺癌细胞系MCF-7中HfO2NP的大量吸收和亚细胞量化.
结论:
- 开发的深度学习辅助的纳米CT技术能够精确地定位和定量分析单细胞内纳米级的超小NP分布.
- HfO2纳米颗粒在瘤细胞中显示出高生物可用性,为其作为先进的放射增强剂的作用提供了机械洞察力.
- 这种3D成像方法为探索NP的亚细胞定量分析提供了有价值的工具,在瘤治疗有效性和安全性评估中具有潜在的应用.
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