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Updated: Jan 19, 2026

Super-Resolution Imaging to Study Co-Localization of Proteins and Synaptic Markers in Primary Neurons
Published on: October 31, 2020
Imaging endogenous synaptic proteins in primary neurons at single-cell resolution using CRISPR/Cas9
Takahiko Matsuda1, Izumi Oinuma1,2
1Laboratory of Cell and Molecular Biology, Graduate School of Life Science, University of Hyogo, Hyogo 678-1297, Japan.
Researchers developed a nonviral CRISPR/Cas9 method to tag proteins in single neurons. This technique allows for precise visualization of protein localization and dynamics in neural networks without altering native expression levels.
Area of Science:
- Neuroscience
- Molecular Biology
- Genetics
Background:
- Analyzing protein spatiotemporal regulation in neural networks requires single-cell resolution.
- Existing methods for protein analysis can be limited by ectopic expression or viral delivery.
Purpose of the Study:
- To develop a nonviral strategy for tagging endogenous proteins in neurons using CRISPR/Cas9.
- To enable accurate visualization of protein localization and dynamics at endogenous levels.
Main Methods:
- CRISPR/Cas9-mediated genome editing combined with nucleofection for nonviral gene targeting.
- Fluorescence imaging, including superresolution and live-cell total internal reflection fluorescence microscopy.
- Immunohistochemistry for validation of protein localization.
Main Results:
- Successfully tagged presynaptic (synaptophysin) and postsynaptic (PSD-95) proteins at endogenous levels in cultured neurons.
- Confirmed identical localization patterns of tagged proteins compared to endogenous proteins.
- Observed dynamic, synchronous movement of tagged proteins along dendritic shafts using live-cell imaging.
Conclusions:
- The developed nonviral CRISPR/Cas9 strategy provides a convenient and versatile tool for analyzing protein dynamics in neurons.
- This method is suitable for multiplexed labeling and live-cell imaging, offering insights into protein function without perturbing cellular processes.
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