Adhesive Gradient
Adhesive Gradient - Related Videos
13:10
Creating Adhesive and Soluble Gradients for Imaging Cell Migration with Fluorescence Microscopy
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Cited by 8 •
2013
A method for the assembly of adhesive and soluble gradients in a microscopy chamber for live cell migration studies is described. The engineered environment combines antifouling surfaces and adhesive tracks with solution gradients and therefore allows one to determine the relative importance of guidance cues.
01:14
Adhesion
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2019
Adhesion occurs when one type of molecule is attracted to a different molecule. Water exhibits adhesive properties in the presence of polar surfaces, such as glass or cellulose in plants. For instance, when water is poured into a glass, the positively charged hydrogen molecules of water are more attracted to the negatively charged oxygen molecules in the silica than to the oxygen in neighboring water molecules. Capillary action is a result of water’s adhesive tendencies. When a narrow glass...
08:42
Density Gradient Ultracentrifugation
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2023
Density gradient ultracentrifugation is a common technique used to isolate and purify biomolecules and cell structures. This technique exploits the fact that, in suspension, particles that are more dense than the solvent will sediment, while those that are less dense will float. A high-speed ultracentrifuge is used to accelerate this process in order to separate biomolecules within a density gradient, which can be established by layering liquids of decreasing density in a centrifuge tube. The...
11:05
A Gradient-generating Microfluidic Device for Cell Biology
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Cited by 14 •
2007
We describe a protocol for the microfabrication of the gradient-generating microfluidic device that can generate spatial and temporal gradients in well-defined microenvironment. In this approach, the gradient-generating microfluidic device can be used to study directed cell migration, embryogenesis, wound healing, and cancer metastasis.
03:36
Purification of Bacteriophages Using a Sucrose Density Gradient
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2026
Source: Rustad, M., et.al. Synthesis of Infectious Bacteriophages in an E. coli-based Cell-free Expression System. J. Vis. Exp. (2017)This video demonstrates the purification of bacteriophages from a suspension containing host bacterial debris using a sucrose density gradient. It shows how the density gradient separates phages by buoyant density, enabling recovery of a visible band for resuspension and further analysis.
FAQs
Local differences in ligand density alter how readily cell receptors bind to the material. These changes can affect cell spreading and traction, the forces cells exert on their surroundings. Because neighboring positions provide different adhesive cues, cells can compare them and adjust their behavior according to location, making the gradient useful for examining cell-material interactions.
The direction establishes the spatial path along which adhesive cues change, while steepness determines how rapidly those cues vary across the surface. Changing either feature allows researchers to test how strongly cells respond to positional differences in adhesion. These controlled variations help separate responses to adhesive level from responses to the spatial organization of the cue.
Haptotaxis describes directed cell migration in response to spatial differences in adhesion-related cues. Within an adhesive gradient, cells may experience position-dependent receptor binding, spreading, and traction, then alter their movement accordingly. Studying this response provides a way to connect the organization of cell-adhesion molecules with migration behavior rather than examining adhesion at only one uniform level.
Researchers create them by controlling the local presentation of cell-adhesion molecules across a surface or material. The presentation is arranged so that adhesive strength or ligand density changes progressively through space. By specifying the gradient’s direction and steepness, investigators establish a controlled environment in which cells encounter different adhesive conditions at different positions.
These systems support analysis of position-dependent receptor binding, cell spreading, traction, and migration. Observing how those responses change across the gradient helps researchers determine how cells sense adhesive environments and how spatial cues shape cell-material interactions. The resulting information is useful for comparing cellular behavior under organized adhesive conditions rather than under a single uniform surface condition.
Adhesive-gradient platforms can support cell patterning, tissue-interface design, wound-healing models, and regenerative-medicine research. In each setting, the spatial organization of adhesion cues offers a way to guide or investigate how cells interact with a material. The approach also provides a controlled experimental context for studying migration and other cellular responses relevant to engineered biological systems.