Volumetric morphometry reveals spindle width as the best predictor of mammalian spindle scaling.

Volumetric morphometry reveals spindle width as the best predictor of mammalian spindle scaling.
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DOI:
10.1083/jcb.202106170
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发表时间:
2022-01-03
期刊:
The Journal of cell biology
影响因子:
--
通讯作者:
Reber S
Reber S
中科院分区:
其他
文献类型:
--
作者:
Kletter T;Reusch S;Cavazza T;Dempewolf N;Tischer C;Reber S

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Kletter等人介绍了Spindle3D,这是一种开源图像分析工具,可以在共聚焦图像中对有丝分裂纺锤体和染色质进行一致和自动的形态定量。他们通过Spindle3D分析了各种细胞类型,发现有丝分裂纺锤体宽度是哺乳动物纺锤体缩放的可靠预测因子。细胞结构在中尺度上的功能取决于它们的几何形状和与细胞大小的比例。有丝分裂纺锤体是细胞内细胞器的长度和形状很重要的一个很好的例子。纺锤体的长度决定了染色体分离的距离,而纺锤体的形状则决定了双极性。虽然我们仍然缺乏对亚细胞形态学的系统和定量了解,但新的成像技术和体积数据分析有望对不同物种之间的比例关系产生新的见解。在这里,我们介绍Spindle3D,一个开源插件,允许对纺锤体和染色质的3D荧光数据进行定量,一致和自动化分析。我们系统地分析了不同的哺乳动物细胞类型,包括体细胞、干细胞以及单细胞和双细胞胚胎,以推导出纺锤体、染色质和细胞的体积关系。两者合计,我们的数据表明,有丝分裂纺锤体宽度是一个强大的指标纺锤体体积,这与染色质和细胞体积都在单细胞类型和跨哺乳动物物种线性相关。
Kletter et al. introduce Spindle3D, an open-source image analysis tool that allows for consistent and automated morphometric quantification of the mitotic spindle and chromatin in confocal images. They analyze various cell types via Spindle3D and find that mitotic spindle width is a robust predictor of mammalian spindle scaling. The function of cellular structures at the mesoscale is dependent on their geometry and proportionality to cell size. The mitotic spindle is a good example why length and shape of intracellular organelles matter. Spindle length determines the distance over which chromosomes will segregate, and spindle shape ensures bipolarity. While we still lack a systematic and quantitative understanding of subcellular morphology, new imaging techniques and volumetric data analysis promise novel insights into scaling relations across different species. Here, we introduce Spindle3D, an open-source plug-in that allows for the quantitative, consistent, and automated analysis of 3D fluorescent data of spindles and chromatin. We systematically analyze different mammalian cell types, including somatic cells, stem cells, and one- and two-cell embryos, to derive volumetric relations of spindle, chromatin, and the cell. Taken together, our data indicate that mitotic spindle width is a robust indicator of spindle volume, which correlates linearly with chromatin and cell volume both within single cell types and across mammalian species.
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