Lipid Vesicle Model
Lipid Vesicle Model - Related Videos
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.
11:35
Constant Pressure-controlled Extrusion Method for the Preparation of Nano-sized Lipid Vesicles
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Cited by 29 •
2012
This protocol describes an extrusion method for preparing lipid vesicles of sub-micron sizes with a high degree of homogeneity. This method uses a pressure-controlled system with controlled nitrogen flow rates for liposome preparation. The lipid preparation1,2, liposome extrusion, and size characterization will be presented herein.
07:33
Lipid Vesicle-mediated Affinity Chromatography using Magnetic Activated Cell Sorting (LIMACS): a Novel Method to Analyze Protein-lipid Interaction
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Cited by 14 •
2011
To test the interaction of a protein with its target lipid we used MACS and Annexin V-conjugated magnetic beads and lipid vesicles synthesized from the target lipid and Annexin V-binding phosphatidylserine. Proteins bound to the target lipid are co-purified and analyzed after elution from the beads.
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Synthesis of Compound Giant Unilamellar Vesicles: A Biomimetic Model of Nucleate Cells
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2025
This article presents a method for preparing compound Giant Unilamellar Vesicles (cGUVs) with a vesicle-in-vesicle structure, with customized electrical conductivity in inner, annular, and outer regions. Electroformation synthesizes simple GUVs, which are transformed into stomatocytes and cGUVs via osmotic shock, providing a valuable model for studying the biophysics of nucleated cells.
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...
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Phospholipid amphipathy drives the membrane arrangement: hydrophobic tails avoid water by orienting toward the bilayer interior, while hydrophilic heads contact both the surrounding solution and the vesicle’s aqueous contents. This orientation produces a stable boundary and creates a defined separation between internal and external environments, allowing researchers to investigate membrane organization under controlled conditions.
Selective permeability allows a vesicle to separate substances that cross the membrane from those that remain excluded. By examining molecular transport across this boundary, researchers can study how membrane organization influences movement between compartments. The model therefore connects a physical membrane property with biological questions about exchange, access to internal contents, and compartmentalization.
The system supports investigation of membrane fusion, interactions with proteins, and responses to external compounds in addition to permeability. These processes can alter how vesicles interact with their surroundings or with one another. Studying them in a simplified membrane environment helps isolate membrane-related behavior that would be more complex to examine in an intact cell.
A basic setup begins by placing amphipathic phospholipids in water, where they spontaneously organize into a closed bilayer and enclose an aqueous compartment. Researchers can then use that organized structure as a defined experimental system for examining transport, permeability, fusion, membrane organization, or interactions with proteins and external compounds.
Researchers may choose vesicles when they need a controllable representation of a cell membrane rather than the full complexity of a living cell. The enclosed aqueous compartment and simplified lipid boundary make it easier to focus on selected membrane behaviors, including transport, fusion, organization, or interactions with particular proteins or compounds.
In drug-delivery research, the enclosed aqueous compartment and membrane boundary provide a model for examining how compounds can be associated with a membrane-bounded carrier. In synthetic biology, vesicles help represent cellular compartmentalization and support studies of membrane-based organization. These applications extend the model from basic membrane research to engineered cell-like systems.