Outer Leaflet Lipids
Outer Leaflet Lipids - Related Videos
10:29
Combining 3D-Printing and Electrospinning to Manufacture Biomimetic Heart Valve Leaflets
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Cited by 6 •
2022
The presented method offers an innovative way for engineering biomimetic fiber structures in three-dimensional (3D) scaffolds (e.g., heart valve leaflets). 3D-printed, conductive geometries were used to determine shape and dimensions. Fiber orientation and characteristics were individually adjustable for each layer. Multiple samples could be manufactured in one setup.
11:12
Protocol for Relative Hydrodynamic Assessment of Tri-leaflet Polymer Valves
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Cited by 5 •
2013
There has been renewed interest in developing polymer valves. Here, the objectives are to demonstrate the feasibility of modifying a commercial pulse duplicator to accommodate tri-leaflet geometries and to define a protocol to present polymer valve hydrodynamic data in comparison to native and prosthetic valve data collected under near-identical conditions.
07:34
Layer Microdissection of Tricuspid Valve Leaflets for Biaxial Mechanical Characterization and Microstructural Quantification
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2022
This protocol describes the biaxial mechanical characterization, polarized spatial frequency domain imaging-based collagen quantification, and microdissection of tricuspid valve leaflets. The provided method elucidates how the leaflet layers contribute to the holistic leaflet behaviors.
07:31
Realistic Membrane Modeling Using Complex Lipid Mixtures in Simulation Studies
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Cited by 1 •
2023
Membrane lipid diversity in structure and composition is an important contributor to cellular processes and can be a marker of disease. Molecular dynamics simulations allow us to study membranes and their interactions with biomolecules at atomistic resolution. Here, we provide a protocol to build, run, and analyze complex membrane systems.
07:26
Size Exclusion Chromatography to Analyze Bacterial Outer Membrane Vesicle Heterogeneity
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Cited by 23 •
2021
Bacterial vesicles play important roles in pathogenesis and have promising biotechnological applications. The heterogeneity of vesicles complicates analysis and use; therefore, a simple, reproducible method to separate varying sizes of vesicles is necessary. Here, we demonstrate the use of size exclusion chromatography to separate heterogeneous vesicles produced by Aggregatibacter actinomycetemcomitans.
FAQs
These lipid-translocating enzymes regulate how molecules are distributed between the two membrane leaflets. Flippases and floppases contribute to selective redistribution, whereas scramblases provide another regulated route for moving lipids across the bilayer. Their activity helps establish or alter asymmetry during membrane biogenesis and under specific cellular conditions, making enzyme regulation central to membrane organization.
Asymmetry gives the plasma membrane different chemical compositions on its extracellular and intracellular sides. The outer leaflet therefore helps determine surface chemistry and how the cell interacts with its environment. Changes in its composition can influence cell recognition, signaling, trafficking, and interactions with external molecules such as drugs, toxins, and pathogens.
These lipid classes form important components of the extracellular-facing membrane layer. Together, they contribute to membrane structure and surface chemistry rather than serving as interchangeable molecules with identical effects. Examining their composition helps biochemists relate the molecular makeup of the surface to cell recognition, environmental interactions, and broader membrane organization.
A useful analysis considers both which lipid classes are present and how their distribution relates to the opposite leaflet. Researchers can also examine the enzymes that move lipids between leaflets and the conditions that regulate those movements. Connecting composition, asymmetry, and enzyme activity helps explain how the membrane maintains or changes its functional surface.
Because these molecules form part of the cell’s extracellular surface, their composition can affect how the cell is identified and how it interacts with its surroundings. Biochemical studies connect lipid distribution with signaling and trafficking, allowing researchers to investigate how membrane organization supports communication and movement of materials across cellular systems.
The outer membrane surface is a point of contact between the cell and external biological or chemical agents. Its lipid composition and organization can therefore provide context for studying apoptosis, as well as interactions with drugs, toxins, and pathogens. Comparing surface lipid patterns with these outcomes helps relate membrane biochemistry to cellular responses and environmental exposure.