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Updated: Feb 13, 2026
14:11
Imaging Dendritic Spines of Rat Primary Hippocampal Neurons using Structured Illumination Microscopy
Published on: May 4, 2014
16.4K
Super-resolution structural analysis of dendritic spines using three-dimensional structured illumination microscopy
Kazuaki Sawada1,2, Ryosuke Kawakami1,2, Ryuichi Shigemoto3
1Graduate School of Information Science and Technology, Hokkaido University, Sapporo, Japan.
The European Journal of Neuroscience
|March 8, 2018
Summary
Researchers used structured illumination microscopy (SIM) with a novel clearing reagent (LUCID) to image dendritic spines in fixed brain tissue. This technique improved resolution and revealed spine morphology changes undetectable by confocal microscopy.
Area of Science:
- Neuroscience
- Microscopy
- Cell Biology
Background:
- Structured illumination microscopy (SIM) offers super-resolution but faces challenges in fixed tissues due to light scattering and aberrations.
- Imaging dendritic spines in fixed tissue with SIM is difficult, limiting detailed morphological analysis.
Purpose of the Study:
- To overcome limitations of SIM in fixed tissues for dendritic spine imaging.
- To assess the utility of a novel clearing reagent (LUCID) for improving SIM performance.
- To analyze dendritic spine morphology in response to chronic dexamethasone treatment.
Main Methods:
- Application of a novel clearing reagent, LUCID, to fixed brain slices.
- Three-dimensional (3D) super-resolution structured illumination microscopy (SIM) imaging.
- Morphological analysis of dendritic spine heads in layer V pyramidal neurons (L5PNs) from the medial prefrontal cortex (mPFC).
- Comparison with high-numerical aperture (NA) confocal imaging.
Main Results:
- LUCID treatment improved penetration depth and spatial resolution in SIM imaging of fixed brain tissue.
- Achieved 160-nm spatial resolution in a significant imaging volume along a single apical dendrite.
- SIM imaging revealed altered dendritic spine distributions in chronic dexamethasone-treated mice, missed by confocal microscopy.
Conclusions:
- Super-resolution SIM imaging, enhanced by LUCID clearing, is a powerful method for analyzing dendritic spine morphology in fixed tissues.
- This approach offers a high-throughput solution for detailed investigation of spine structures.
- Reveals subtle morphological changes in dendritic spines relevant to neurological studies.
Keywords:
dendritic spinesfixed mouse brainprefrontal cortexthree-dimensional structured illumination microscopytissue clearing methodsMore Related Videos
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