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Updated: Jul 3, 2026
09:30
Super-resolution Imaging of Neuronal Dense-core Vesicles
Published on: July 2, 2014
The relationship between complex vesicles, dense-cored vesicles and dense projections in cortical synaptosomes
1Department of Anatomy, University of Western Australia, Nedlands, Western Australia.
Tissue & Cell
|January 1, 1971
Summary
The study reveals that complex vesicle shells form dense projections in cortical synaptosomes, linking to the presynaptic network. Electrical stimulation enhances this vesicle-projection association.
Area of Science:
- Neuroscience
- Cell Biology
- Electron Microscopy
Background:
- Cortical synaptosomes are crucial for neuronal communication.
- The relationship between synaptic vesicles and presynaptic structures is not fully understood.
- Dense projections and complex vesicles are key components of the synapse.
Purpose of the Study:
- To investigate the structural relationship between complex vesicles and dense projections in cortical synaptosomes.
- To determine the role of complex vesicle shells in forming dense projections.
- To explore the impact of electrical stimulation on this synaptic association.
Main Methods:
- Cortical synaptosomes were fixed using osmium tetroxide (OsO4) and glutaraldehyde.
- Block-staining was performed using phosphotungstic acid (PTA).
- Transmission electron microscopy was used for ultrastructural analysis.
Main Results:
- The shell of complex vesicles was found to contribute to the formation of dense projections.
- A correspondence was observed between the complex vesicle shell and the presynaptic network.
- Electrical stimulation of synaptosomes appeared to accentuate the association between complex vesicles and dense projections.
Conclusions:
- The study elucidates the structural contribution of complex vesicles to dense projections.
- Findings suggest a functional link between vesicle components and the presynaptic network.
- Synaptic activity may modulate the interaction between vesicles and presynaptic structures.
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