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Related Experiment Video

Updated: Mar 16, 2026

Visualization of miniSOG Tagged DNA Repair Proteins in Combination with Electron Spectroscopic Imaging ESI

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Published on: September 24, 2015

Now You See Me: Visualizing nuclear complexity by selective staining.

Claudio Casali¹, Margherita Cavallo¹, Adel Diaf¹

¹Laboratory of Cell Biology and Neurobiology, Department of Biology and Biotechnology, University of Pavia, Pavia 27100, Italy.

Methods (San Diego, Calif.)

|March 14, 2026

Summary

This study presents an integrated transmission electron microscopy (TEM) workflow for analyzing nuclear remodeling in mammalian erythropoiesis. Different staining methods reveal distinct ultrastructural details, aiding chromatin condensation and nuclear reorganization studies.

Keywords:

Chromatinremodeling Cytochemical staining Erythropoiesis Nuclear architecture RNA localization Ribonucleoproteins Transmission electron microscopy

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Area of Science:

Cell Biology
Microscopy
Molecular Biology

Background:

Transmission electron microscopy (TEM) provides nanoscale resolution of cellular structures.
Biological interpretation of TEM images relies heavily on staining protocols.
Nuclear remodeling, including chromatin condensation, is crucial in cell biology.

Purpose of the Study:

To develop and validate an integrated TEM workflow for studying nuclear remodeling in mammalian erythropoiesis.
To systematically compare various cytochemical staining strategies for ultrastructural analysis.
To establish a methodological reference for nanoscale nuclear imaging.

Main Methods:

Application of an integrated TEM workflow to mammalian erythropoiesis.
Systematic comparison of staining protocols: uranyl acetate/lead citrate, EDTA regressive, osmium ammine, terbium citrate vapors, and H3K9me3 immunogold labeling.
Integration with segmentation tools for high-resolution mapping of cellular structures.

Main Results:

Each staining method revealed distinct structural features of the nucleus.
Combined staining and segmentation enabled high-resolution mapping of nuclear components.
The choice of staining protocol significantly impacts image interpretation and quantitative analysis.

Conclusions:

The integrated TEM workflow provides a standardized pipeline for nanoscale nuclear imaging.
Findings offer insights into the spatial organization of chromatin at the ultrastructural level.
This approach has potential applicability across diverse biological systems.