Angiogenic Factor Gradient
Angiogenic Factor Gradient - Related Videos
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...
10:04
The Aortic Ring Co-culture Assay: A Convenient Tool to Assess the Angiogenic Potential of Mesenchymal Stromal Cells In Vitro
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Cited by 12 •
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Here, we present a novel application of the aortic ring assay where prelabelled mesenchymal cells are co-cultured with rat aorta-derived endothelial networks. This novel method allows visualization of Mesenchymal Stromal Cells (MSCs) homing and integration with endothelial networks, quantification of network properties, and evaluation of MSC immunophenotypes and gene expression.
04:21
Generating Anti-Angiogenic Tumor-Associated Neutrophils
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2025
This video demonstrates an assay to generate anti-angiogenic tumor-associated neutrophils (TANs). Upon taking a murine melanoma tumor containing pro-angiogenic TANs, the single cells are isolated using fluorescence-activated cell sorting (FACS) and treated with an inhibitor of nicotinamide phosphoribosyl transferase (NAMPT) to reduce the capacity to stimulate angiogenesis.
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.
10:52
Denaturing Gradient Gel Electrophoresis (DGGE)
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Cited by 10 •
2007
FAQs
Endothelial cells respond to an angiogenic factor gradient by sensing signaling conditions across space. Local concentration changes can guide their directed migration, promote sprouting, and influence how they organize into vascular networks. This spatially structured response connects the engineered signal to vessel formation, making the gradient useful for examining how cells navigate tissue-like environments.
Vascular endothelial growth factor is one example of a signaling molecule that can be arranged with a spatial concentration difference. In that setting, the factor provides a cue that endothelial cells can sense, linking its local distribution to migration, sprouting, and network organization. Its inclusion allows bioengineers to investigate how a defined molecular signal shapes vascular behavior.
Spatial patterning turns a signaling molecule into a directional cue rather than only a local stimulus. Because endothelial cells sense concentration changes across space, the arrangement can influence where migration and sprouting occur and how cells organize into networks. This is important in bioengineering because it links the geometry of a molecular signal to the formation of tissue-relevant vascular structures.
Researchers can establish the gradient within a biomaterial or a culture system, then examine endothelial-cell responses to the resulting spatial signal. The key experimental connection is between controlled factor placement, local concentration changes, and observable outcomes such as directed migration, sprouting, or network organization. This approach recreates selected features of a tissue microenvironment.
An experimental setup needs a signaling factor such as vascular endothelial growth factor, a biomaterial or culture system capable of supporting a spatial difference, and endothelial cells that can sense the cue. Together, these components connect gradient design with cellular behavior. Researchers can then evaluate whether the engineered environment produces migration, sprouting, or organization into vascular networks.
Researchers use this approach to study cell guidance, recreate aspects of the tissue microenvironment, or improve vascularization in engineered tissues. A designed gradient may support nutrient delivery and graft integration, while in regenerative medicine it provides a strategy for addressing vascular formation. These uses connect mechanistic studies of endothelial behavior with practical tissue-engineering goals.