Single Vesicle Analysis
Single Vesicle Analysis - Related Videos
02:35
Single-Cell Culture of Bacteria Within Giant Vesicles
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2025
Source: Morita, M., et al. Bacterial Cell Culture at the Single-cell Level Inside Giant Vesicles. J. Vis. Exp. (2019).This video demonstrates a method for culturing and observing individual bacterial cells encapsulated inside giant vesicles anchored to a supported lipid bilayer. The system enables stable, long-term imaging of single-cell growth dynamics in a confined, physiologically relevant microenvironment.
05:47
Patch-Clamp Techniques for Single Endolysosomal Vesicle Analysis
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2025
This protocol details a method for directly measuring ion channel activity on intracellular vesicles using a manual endolysosomal patch-clamp system. We illustrate the method that involves enlarging endolysosomes and manually isolating these vesicles. This approach ensures that researchers can accurately replicate and apply the procedure.
09:39
Techniques for the Analysis of Extracellular Vesicles Using Flow Cytometry
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Cited by 31 •
2015
Many different methods exist for the measurement of extracellular vesicles (EVs) using flow cytometry (FCM). Several aspects should be considered when determining the most appropriate method to use. Two protocols for measuring EVs are presented, using either individual detection or a bead-based approach.
04:53
Preparing Cultured Neurons for Optical Analysis of Recycled Synaptic Vesicles
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2025
This video demonstrates the procedure for preparing cultured neurons for optical analysis of recycled synaptic vesicles. The process involves fluorescence tagging of synaptic vesicle proteins and immunostaining to label and visualize the recycled vesicles within the neurons.
09:02
Quantitative Analysis of Synaptic Vesicle Pool Replenishment in Cultured Cerebellar Granule Neurons using FM Dyes
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Cited by 11 •
2011
A live fluorescence imaging technique to quantify the replenishment and mobilisation of specific synaptic vesicle (SV) pools in central nerve terminals is described. Two rounds of SV recycling are monitored in the same nerve terminals providing an internal control.
FAQs
The key advantage is resolution: measurements from individual vesicles can show that vesicles within the same synapse do not necessarily have identical properties. Comparing single-event signals allows researchers to examine variation in vesicle size, neurotransmitter content, release probability, and recycling rather than averaging these features together. This distinction supports more precise analysis of how synapses regulate communication.
Optical or electrochemical signals are used to monitor individual exocytotic events, allowing researchers to associate signal changes with stages of vesicle behavior. Docking concerns the vesicle’s position at the synaptic membrane, fusion concerns membrane merger, and release concerns transmitter output. Examining these events separately helps identify which stage contributes to differences in synaptic transmission.
Vesicle size, neurotransmitter content, release probability, and recycling are central variables. A vesicle’s content affects the amount available for transmission, while its probability of release influences how often an arriving signal produces exocytosis. Recycling determines how vesicles become available again. Measuring these properties individually helps connect vesicle-level behavior with changes in synaptic strength.
The signal provides an event-level readout of exocytosis rather than a pooled measurement from many vesicles. Depending on the optical or electrochemical approach, it can indicate that a vesicle has docked, fused, or released neurotransmitter. Aggregating these individual observations then enables comparisons of release behavior, transmitter content, and recycling across vesicles or experimental conditions.
A study first examines individual synaptic vesicles, then monitors optical or electrochemical signals associated with single exocytotic events. Researchers analyze those events for docking, fusion, and transmitter release, and quantify properties such as vesicle size, content, release probability, or recycling. The resulting measurements can be compared across conditions to identify changes in synaptic function.
This approach is useful when researchers need to resolve functional differences that population averages may conceal. The overview identifies applications in studying short-term plasticity, neuronal development, and disease-related changes in synaptic transmission. By measuring vesicle behavior at single-event resolution, investigators can relate altered release properties to changes in neuronal communication.
Single-vesicle measurements provide detailed information about how release probability, transmitter content, and recycling vary during synaptic communication. These data help researchers move beyond a single average value for synaptic output and represent vesicle-level differences in models. Such precision can improve explanations of how synapses regulate strength and encode information, particularly during plasticity or disease-related changes.