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时间分辨率在单粒子跟踪分析中的影响

Chiara Schirripa Spagnolo¹, Stefano Luin^2,3

¹NEST Laboratory, Scuola Normale Superiore, Piazza San Silvestro 12, 56127, Pisa, Italy. chiara.schirripaspagnolo@sns.it.

|May 9, 2024

概括

时间分辨率显著影响单个粒子跟踪分析,影响扩散率估计. 这项研究提供了工具来优化时间采样,以获得动态生物过程中准确的结果.

科学领域:

生物物理学的生物物理.
细胞生物学细胞生物学
显微镜的使用方法

背景情况:

时间分辨率对于观察动态过程至关重要,例如使用光显微镜观察单个分子运动.
缺乏对所有单个粒子跟踪 (SPT) 分析步骤中时间分辨率的影响的系统调查.

研究的目的:

量化时间分辨率对SPT分析中扩散率估计和分布的影响.
利用模拟和实验数据开发用于评估时间分辨效应的工具.

主要方法:

利用流行的SPT软件在不同的时间采样条件下分析模拟数据和电影.
研究了模拟扩散率,点密度,信号噪声比,轨道长度和边界条件的影响.
检查了与TIRF显微镜可视化的p75^NTR等快速扩散膜受体相关的实验条件.

主要成果:

根据时间采样和模拟参数,在扩散率分布中发现了显著的移位和变化的宽度.
确定了模拟模拟p75^NTR实验的最佳时间分辨率条件.
证实了适合于可靠的扩散度测量的时间分辨率范围.

结论:

时间采样和各种参数之间的相互作用极大地影响了SPT分析结果.
开发的程序有助于确定最佳的时间分辨率,以满足各种SPT应用.
这项工作为改善活细胞成像中的扩散度测量的准确性提供了一个框架.

关键词:

平均平方位移的平均平方位移.分子扩散的分子扩散.纳米生物成像技术单个分子模拟.单个分子跟踪跟踪.

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