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Periodicity of nuclear morphology in human fibroblasts

机译:人成纤维细胞核形态的周期性

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Motivation: Morphology of the cell nucleus has been used as a key indicator of disease state and prognosis, but typically without quantitative rigor. It is also not well understood how nuclear morphology varies with time across different genetic backgrounds in healthy cells. To help answer these questions we measured the size and shape of nuclei in cell-cycle-synchronized primary human fibroblasts from 6 different individuals at 32 time points over a 75?hour period.Results: The nucleus was modeled as an ellipsoid and its dynamics analyzed. Shape and volume changed significantly over this time. Two prominent frequencies were found in the 6 individuals: a 17?hour period consistent with the cell cycle and a 26?hour period. Our findings suggest that the shape of the nucleus changes over time and thus any time-invariant shape property may provide a misleading characterization of cellular populations at different phases of the cell cycle. The proposed methodology provides a general method to analyze morphological change using multiple time points even for non-live-cell experiments.
机译:动机:细胞核的形态已被用作疾病状态和预后的关键指标,但通常没有严格的定量指标。还没有很好地理解健康细胞中不同遗传背景下的核形态如何随时间变化。为了帮助回答这些问题,我们在75个小时的时间段内,在32个时间点测量了来自6个不同个体的细胞周期同步原代人类成纤维细胞中细胞核的大小和形状。结果:将细胞核建模为椭球,并对其动力学进行了分析。在此期间,形状和体积发生了显着变化。在这6个人中发现了两个突出的频率:与细胞周期一致的17小时时间和26小时的时间。我们的发现表明细胞核的形状会随着时间而变化,因此任何时不变的形状属性都可能在细胞周期的不同阶段提供误导性的细胞群体特征。所提出的方法提供了一种通用方法,即使对于非活细胞实验,也可以使用多个时间点来分析形态变化。

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