用光学支架操纵的细胞的X射线相位对比断层扫描
Jan Philipp Burchert1, Jasper Frohn1, Ulrike Rölleke1
1Institute for X-ray Physics, University of Göttingen, Friedrich-Hund-Platz 1, 37077 Göttingen, Germany.
Journal of synchrotron radiation
|June 11, 2024
概括
这项研究引入了一种新的X射线成像技术,用于检查水合或活体状态下的单个细胞. 这种方法避免了人工物,并允许详细的3D电子密度绘制细胞结构的图像.
科学领域:
- 生物物理学的生物物理.
- 细胞生物学 细胞生物学
- 先进的成像技术,以及先进的成像技术.
背景情况:
- 射线为检查细胞内部结构提供高空间分辨率.
- 传统的方法经常引入由于样品准备 (冷,干燥,嵌入) 的文物.
- 需要在细胞的原生,水合或活状态下进行非侵入性成像.
研究的目的:
- 将X射线相位对比成像和断层扫描与X射线兼容的光学支架和微流体样本输送相结合起来.
- 为了能够在现场检查悬浮中的单个细胞.
- 为了实现细胞的高分辨率3D电子密度映射,没有人工物.
主要方法:
- 使用同步射线X射线相位对比成像和断层扫描.
- 采用X射线兼容的光学支架进行细胞操纵和悬浮.
- 实施微流体样本交付用于持续检查.
- 应用3D代数重建方案用于断层分析.
- 研究光束能量对相位移动的影响.
主要成果:
- 成功成像的单个细胞 (NIH3T3小鼠纤维细胞) 在水和生活状态.
- 生成的二维相位移图像与预测的局部电子密度成比例.
- 重建了细胞的3D电子密度图.
- 在旋转过程中,在光学支架内监控细胞运动.
- 证明了在不同的环境和机械压力下研究细胞的能力.
结论:
- 结合的技术允许在细胞的原始状态下进行无文物,高分辨率的3D成像.
- 这种方法为细胞结构和动态提供了新的见解.
- 该方法具有多功能性,适用于各种细胞类型和实验条件.
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