Vesicle Separation
Vesicle Separation - Related Videos
03:15
Separation and Enrichment of Extracellular Vesicles in the Presence of Virions
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2026
Source: DeMarino, C., et al. Purification of High Yield Extracellular Vesicle Preparations Away from Virus. J. Vis. Exp. (2019)The video demonstrates the separation of EVs from virions and other contaminants by density gradient centrifugation, followed by capture and concentration with hydrogel nanoparticles. Washed fractions are then ready for downstream identification of those enriched in EVs.
04:51
Size Exclusion Chromatography Based Separation of Bacterial Extracellular Vesicles: A Technique to Separate Heterogenous Population of Gram-Negative Bacterial Outer Membrane Vesicles Based on Their Size
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2025
In this video, we demonstrate a technique–size exclusion chromatography–to separate a heterogenous population of outer membrane vesicles or OMVs derived from bacteria. These vesicles are nanosized spherical structures and are separated into large and small subpopulations based on their size through Size Exclusion Chromatography.
06:34
In vitro Reconstitution of Cytoskeletal Networks inside Phase Separated Giant Unilamellar Vesicles (GUVs)
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Cited by 1 •
2025
This article introduces a simple one-pot reconstitution of cytoskeletal networks inside phase separated giant vesicles. The method can be generalized and applied to encapsulation or confinement of a wide range of biomolecules.
10:46
Size Exclusion Chromatography for Separating Extracellular Vesicles from Conditioned Cell Culture Media
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Cited by 5 •
2022
The protocol here demonstrates that extracellular vesicles can be adequately separated from conditioned cell culture media using size exclusion chromatography.
08:36
FM Dyes in Vesicle Recycling
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2023
FM dyes are a class of fluorescent molecules that has found important use in studying the vesicle recycling process. By virtue of a chemical structure, these molecules can insert themselves into the outer leaflet of phospholipid bilayer membranes. After membrane insertion, they are internalized into the cell via endocytosed vesicles, and released when these vesicles recycle back to the membrane. Since, these dyes fluoresce strongly in the hydrophobic environment within membranes and weakly in...
FAQs
Differential centrifugation separates vesicle-containing fractions by using sedimentation behavior, so successive centrifugation steps can enrich material with different physical properties. The approach provides an initial fractionation before a density-gradient, size-exclusion, or affinity-based step adds selectivity. In neuronal studies, this staged strategy helps obtain vesicle preparations suitable for examining synaptic components while limiting reliance on a single separation property.
Density-gradient, size-exclusion, and affinity-based approaches distinguish different features. Density gradients use buoyant density, size-exclusion uses size, and affinity methods use surface markers. Choosing among them, or combining them, changes which vesicles become enriched and therefore which populations can be examined. This comparison is important when the goal is to focus on synaptic vesicles or another biologically defined fraction.
The separation criterion must match the biological question: size and buoyant density support physical fractionation, whereas surface markers enable affinity-based enrichment. Membrane preservation is equally important because vesicles need to retain their boundaries and contents for downstream study. These factors determine whether an isolated fraction faithfully represents vesicle-associated neurotransmitters, membrane proteins, or release machinery.
A practical workflow begins with differential centrifugation to enrich vesicle-containing material, followed by density-gradient, size-exclusion, or affinity-based separation selected for the target population. The resulting fraction can then be examined for neurotransmitters, membrane proteins, and release machinery. Keeping the separation strategy aligned with the intended measurement helps connect a fraction's composition to neuronal function.
Isolated synaptic vesicles provide material for examining their neurotransmitters, membrane proteins, and release machinery. These measurements can reveal which molecular components are associated with vesicles and help clarify mechanisms of synaptic transmission and neuronal communication. The value of the preparation therefore lies not only in obtaining a fraction, but in linking its molecular contents to vesicle function.
Beyond characterizing synaptic contents, vesicle separation supports studies of vesicle trafficking and the molecular mechanisms regulating neurotransmitter release. It is also relevant to investigations of neurodegenerative disease and drug responses. In each case, isolating vesicle-associated material gives researchers a way to examine changes in vesicle composition or release-related machinery in relation to the biological condition being studied.