Phospholipid Vesicles
Phospholipid Vesicles - Related Videos
02:43
Quantitative Flow Cytometry to Study Labeled Protein-Phospholipid Vesicle Interactions
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2025
In this video, we demonstrate the interaction between proteins and artificial phospholipid vesicles using quantitative flow cytometry. The binding of fluorescently-labeled proteins to fluorescently-labeled phospholipid vesicles increases the mean fluorescence intensity, and this increase is detected by a flow cytometer.
09:52
A Fluorescence-based Assay of Phospholipid Scramblase Activity
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Cited by 61 •
2016
We describe a fluorescence-based assay to measure phospholipid scrambling in large unilamellar liposomes reconstituted with opsin.
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.
10:03
Extraction and Analysis of Microbial Phospholipid Fatty Acids in Soils
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Cited by 133 •
2016
Phospholipid fatty acids provide information about the structure of soil microbial communities. We present methods for extraction from soil samples with a single-phase chloroform mixture, fractionation of extracted lipids using solid phase extraction columns, and methanolysis to produce fatty acid methyl esters, which are analyzed by capillary gas chromatography.
08:35
Lipid Bilayer Vesicle Generation Using Microfluidic Jetting
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Cited by 16 •
2014
Microfluidic jetting against a droplet interface lipid bilayer provides a reliable way to generate vesicles with control over membrane asymmetry, incorporation of transmembrane proteins, and encapsulation of material. This technique can be applied to study a variety of biological systems where compartmentalized biomolecules are desired.
FAQs
The bilayer creates separate aqueous and nonaqueous regions, allowing investigators to examine how substances cross a membrane-like barrier under controlled conditions. Because the lipid composition can be isolated from other cellular components, researchers can attribute changes in permeability, stability, or fusion more directly to the membrane system being studied. This makes vesicles useful simplified platforms for biological techniques.
These preparation conditions influence the physical organization of the resulting vesicles, particularly their size and lamellarity, meaning the number of lipid layers present. Hydration supplies the aqueous environment needed for assembly, while agitation and extrusion help produce more controlled populations. Adjusting these factors allows researchers to create vesicle systems suited to specific membrane or transport experiments.
Lipid composition determines which membrane properties can be examined, while the selected cargo provides a substance whose retention, release, or transport can be assessed. Keeping both variables defined helps researchers connect observed behavior to membrane structure or cargo characteristics rather than to uncontrolled biological complexity. This design supports systematic studies of permeability, stability, and delivery-related behavior.
They can reveal how membrane systems behave during permeability changes, fusion events, and shifts in stability. Vesicles isolate these behaviors from the many interacting components of a complete cell, so researchers can vary lipid composition or cargo and observe the resulting response. Such controlled comparisons help clarify how membrane-associated processes depend on the surrounding experimental conditions.
A general workflow begins by selecting the lipid composition and placing the phospholipids in an aqueous environment. Hydration promotes membrane organization, after which agitation or extrusion can be used to obtain vesicles with selected size or lamellarity characteristics. Researchers can then use the prepared compartments for permeability, fusion, stability, encapsulation, or membrane-protein experiments.
They are useful when researchers need to examine a membrane protein in a simplified membrane setting rather than within a complete cell. Vesicles provide a defined lipid environment in which membrane-protein interactions and membrane-associated processes can be reconstituted. This approach helps separate effects linked to membrane composition from influences contributed by other cellular structures.
Their membrane-bound compartments can encapsulate drugs or biomolecules, allowing researchers to study transport while keeping the cargo associated with a defined lipid system. Vesicles also support targeted delivery research, where investigators evaluate how composition and cargo relate to delivery behavior. These experiments connect basic membrane properties with potential strategies for transporting substances in biological settings.