Abstract
The vertebrate Golgi complex is a large dynamic organelle which undergoes morphological changes and fragmentation both as a part of normal physiological dynamics and under disease conditions. The Golgi is known to have a functionally important relationship with the centrosome. The extent of the spatial association between these two organelles varies in a dynamic and regulated manner. It is essential to have a reliable unbiased approach to evaluate Golgi volume, Golgi extension/scattering in the 3D cell space, and spatial association of the Golgi with the centrosome. It is also important that each of these features is evaluated by a simple metric, one measurement per cell, so that the variability and deviations in the cell population can be easily assessed. Here, we present an approach to analyze confocal microscopy image stacks to easily measure Golgi volume, scattering, and association with the centrosome. The approach is based on a custom MATLAB script, provided here as a supplement, and also uses widely available software (ImageJ and/or Imaris). The output of the script is a table with the following parameters: Golgi volume in voxels, Golgi volume in μm3, “Golgi–Golgi” distance (averaged distance between all Golgi voxels), Golgi–centrosome distance (averaged distance between each Golgi voxel and the nearest mother centriole), and centrosome–centrosome distance (for cells with duplicated centrosome, the distance between the mother centrioles). The approach can also be applied to analyze distribution of any fluorescently- labeled structure within a cell and its association with the centrosome or any single point within the cell volume.
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Acknowledgments
This work was supported by the National Institutes of Health (NIH) grants R35-GM127098 (to I.K.), R01-DK106228 (to I.K.), and R35-GM130298 (to A.K.). K.B.F. was supported by an NIH training grant R25-GM062459 “Initiative for Maximize Student Diversity” (Sealy, PI). We utilized the Flow Cytometry Shared Resource supported by the Vanderbilt Ingram Cancer Center for cell sorting.
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Frye, K.B., Zhu, X., Khodjakov, A., Kaverina, I. (2023). Unbiased Quantification of Golgi Scattering and Golgi–Centrosome Association. In: Wang, Y., Lupashin, V.V., Graham, T.R. (eds) Golgi. Methods in Molecular Biology, vol 2557. Humana, New York, NY. https://doi.org/10.1007/978-1-0716-2639-9_31
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DOI: https://doi.org/10.1007/978-1-0716-2639-9_31
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