Chemokine Gradient Analysis
Chemokine Gradient Analysis - Related Videos
06:56
A Flow Cytometry-based Assay to Identify Compounds That Disrupt Binding of Fluorescently-labeled CXC Chemokine Ligand 12 to CXC Chemokine Receptor 4
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Cited by 20 •
2018
A flow cytometry-based cellular binding assay is described that is primarily used as a screening tool to identify compounds that inhibit the binding of a fluorescently labeled CXC chemokine ligand 12 (CXCL12) to the CXC chemokine receptor 4 (CXCR4).
01:26
What is an Electrochemical Gradient?
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2026
Adenosine triphosphate, or ATP, is considered the primary energy source in cells. However, energy can also be stored in the electrochemical gradient of an ion across the plasma membrane, which is determined by two factors: its chemical and electrical gradients.The chemical gradient relies on differences in the abundance of a substance on the outside versus the inside of a cell and flows from areas of high to low ion concentration. In contrast, the electrical gradient revolves around an ion’s...
10:56
A Novel Three-dimensional Flow Chamber Device to Study Chemokine-directed Extravasation of Cells Circulating under Physiological Flow Conditions
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Cited by 7 •
2013
The three-dimensional flow chamber device is a novel in vitro technology for the quantitative and step-wise evaluation of the extravasation cascade of cells circulating under conditions of physiological shear stress. The device therefore fills a critical need for basic, preclinical, and clinical studies of cell migration.
11:23
Polydimethylsiloxane-polycarbonate Microfluidic Devices for Cell Migration Studies Under Perpendicular Chemical and Oxygen Gradients
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Cited by 14 •
2017
The control of chemical and oxygen gradients is essential for cell cultures. This paper reports a polydimethylsiloxane-polycarbonate (PDMS-PC) microfluidic device capable of reliably generating combinations of chemical and oxygen gradients for cell migration studies, which can be practically utilized in biological labs without sophisticated instrumentation.
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...
FAQs
Diffusion, fluid flow, binding, and degradation collectively determine how chemokine concentration changes across space and time. Diffusion spreads the signal, fluid movement transports it, binding can retain it within an environment, and degradation can reduce its persistence. Bioengineers therefore examine these processes together when evaluating gradient steepness, stability, and spatial distribution.
Cells detect local chemokine concentrations through chemokine receptors and compare signals across their surroundings. A spatial concentration difference can provide directional information, allowing cells to migrate by chemotaxis rather than moving randomly. Measuring the resulting cellular response connects receptor-mediated sensing with observable changes in cell positioning within an engineered microenvironment.
Gradient shape and temporal stability influence the signal available to migrating cells. A gradient may be steep, shallow, stable, or changing over time, and these characteristics affect how consistently cells can detect concentration differences. Quantifying both spatial and temporal behavior helps researchers distinguish the engineered signal from changes caused by transport, binding, or degradation.
A typical workflow establishes controlled chemokine transport, generates or measures the resulting concentration pattern, and then assesses cellular migration or positioning. Microfluidic migration assays are one application because they provide engineered environments for examining gradient formation and cell behavior. Analysis focuses on gradient shape, stability, steepness, and the associated cellular response.
Microfluidic systems are useful when researchers need to examine cell migration under controlled chemokine transport conditions. They support assays that generate or measure gradients while allowing cellular responses to be assessed within an engineered setting. Such experiments can help evaluate how changes in gradient characteristics relate to chemotaxis and cell recruitment.
In tissue engineering, gradient analysis helps evaluate scaffolds designed to regulate cell positioning and recruitment. The same approach can inform systems intended to control inflammation, promote vascularization, or support targeted cell delivery. By linking transport behavior with cellular responses, researchers can assess whether an engineered microenvironment produces the spatial and temporal cues required for its intended function.