Isotropic 3D electron microscopy reference data of wild-type, THP-1 macrophage (jrc_macrophage-2)

Understanding cellular architecture is essential for understanding biology. Electron microscopy (EM) uniquely visualizes cellular structure with nanometer resolution. However, traditional methods, such as thin-section EM or EM tomography, have limitations inasmuch as they only visualize a single slice or a relatively small volume of the cell, respectively. Here, we overcome these limitations by long-term imaging whole cells and tissues via the enhanced Focus Ion Beam Scanning Electron Microscopy (FIB-SEM) platform in high resolution mode with month-long acquisition duration. We use this approach to generate reference 3D image data sets at 4-nm isotropic voxels. Together with subsequent segmentation, we hope to create a reference library to explore comprehensive quantification of whole cells and all their constituents, thus addressing questions related to cell identities, cell morphologies, cell-cell interactions, as well as intracellular organelle organization and structure.<br>Sample: Wild-type THP-1 macrophageProtocol: High pressure freezing, freeze-substitution resin embedding with 2% OsO4 0.1% UA 3% H2O in acetone; resin embedding in Eponate 12.Contributions: Sample provided by Huxley K. Hoffman and Schuyler B. van Engelenburg (U. Denver), prepared for imaging by Gleb Shtengel (HHMI/Janelia), with imaging and post-processing by C. Shan Xu (HHMI/Janelia).Dataset ID: jrc_macrophage-1Final voxel size (nm): 4.0 x 4.0 x 3.36 (X, Y, Z)Dimensions (µm): 40 x 8 x 37 (X, Y, Z)Acquisition date: 2018-11-11Dataset URL: https://data.janelia.org/PzMhfVisualization Website: https://openorganelle.janelia.org/datasets/jrc_macrophage-2<br>Publication: “Isotropic 3D electron microscopy reference library of whole cells and tissues” by C. Shan Xu, et al. (in preparation)<br>