Multimodal imaging of synaptic vesicles with a single probe.

Area of Science:

• Neuroscience
• Cell Biology
• Biochemistry

Background:

• Understanding synaptic-vesicle recycling is crucial for neuroscience.
• Current microscopy probes often target specific modalities, limiting comprehensive analysis.
• A need exists for versatile probes to study vesicle dynamics across different resolutions.

Purpose of the Study:

• To develop a single, modular probe for imaging synaptic vesicles using multiple microscopy techniques.
• To overcome limitations of modality-specific probes in studying vesicle recycling.
• To provide a tool for high-resolution imaging of synaptic vesicle function.

Main Methods:

• Utilized the membrane-binding C2 domain of cytosolic phospholipase A2 (cPLA2).
• Conjugated the C2 domain with various detectable tags.
• Demonstrated imaging of synaptic vesicles with the modular probe.

Main Results:

• A single, modular probe based on the cPLA2 C2 domain was successfully created.
• The probe enabled synaptic vesicle imaging across multiple spatial and temporal resolutions.
• The C2 domain functions as a general endocytic marker.

Conclusions:

• The developed cPLA2 C2 domain probe offers a versatile tool for synaptic vesicle research.
• This modular probe complements existing tools for studying vesicle recycling and membrane dynamics.
• The C2 domain's utility extends to studying membrane recycling in diverse cell types.