Gel Beads
Gel Beads - Related Videos
14:14
Optimized Fibrin Gel Bead Assay for the Study of Angiogenesis
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Cited by 159 •
2007
This video demonstrates the protocol of an in vitro angiogenesis assay that recapitulates several stages of angiogenesis. Time-lapse images of sprouting, lumen formation, branching and anastomosis - key features of angiogenesis - are shown.
06:30
Gel Purification
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2023
Gel purification is used to recover DNA fragments after electrophoretic separation. DNA recovery from an agarose gel includes three basic steps: binding, washing and eluting from a silica column. DNA is believed to bind to silica in the presence of high salt via a salt bridge. Following binding, DNA is washed of impurities and eluted under low salt conditions disrupting this interaction. This video goes through a step-by-step, generalized procedure for cutting out a band from the gel, gel...
04:08
Bead Sprouting Assay for Early-Stage Angiogenesis Assessment: An In Vitro Bead-Based Model to Study Endothelial Sprouting in the Presence of Pericytes
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2025
This video demonstrates a modified microcarrier beads-based assay incorporating pericytes to study endothelial sprouting during the early stages of angiogenesis. The assay provides an in vitro experimental model to understand molecular mechanisms of angiogenesis and the effect of anti-angiogenetic therapeutics.
09:22
DNA Gel Electrophoresis
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2023
DNA gel electrophoresis is a technique used for the detection and separation of DNA molecules. An electric field is applied to a gel matrix comprised of agarose, and within the gel, charge particles will migrate and separate based on size. The negatively charged phosphates of the DNA backbone cause DNA fragments to move toward the anode - a positively charged electrode. The video explains the mechanism by which DNA fragments are resolved on an agarose gel, and it provides a step-by-step...
13:46
Immunoprecipitation-Based Techniques: Purification of Endogenous Proteins Using Agarose Beads
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2023
Source: Susannah C. Shissler1, Tonya J. Webb1 1 Department of Microbiology and Immunology, University of Maryland, Baltimore, MD 21201 Immunoprecipitation (IP, also known as a 'pull-down' assay) is a widely used technique that has applications in a variety of fields. First conceived in 1984, it was refined in 1988 (1, 2). The fundamental goal of IP is purification and isolation of a specific protein using an antibody against that protein. The word "immuno" refers to the use of an antibody while...
FAQs
Calcium ions help convert an alginate polymer into a cross-linked network through ionic interactions. The links stabilize the bead while the polymer structure retains water and creates pores. This combination gives researchers a hydrated matrix that can enclose biological contents without eliminating molecular movement through the material.
Size, porosity, and composition can be adjusted to change how substances move through a bead. These variables affect access to nutrients, gases, or selected molecules, while composition influences the properties of the polymer network. Together, they help control exposure and protection for encapsulated cells, biomolecules, or other materials.
Three-dimensional conditions place cells within a hydrated polymer matrix. In gel beads, this arrangement supports cell immobilization and provides a setting for studying cell behavior. Because the matrix can be adjusted through its composition and structure, it also offers a biomaterial environment relevant to tissue engineering strategies.
A basic preparation approach uses a polymer such as alginate and induces cross-linking with calcium ions. As ionic interactions form a network, the material develops a water-rich, porous structure. Researchers can use this process to enclose cells, biomolecules, or other materials within the resulting beads.
Gel beads support several distinct research applications, including cell immobilization, controlled drug delivery, enzyme studies, tissue engineering, and laboratory assays. In each case, the bead provides a hydrated, adjustable setting for holding the relevant material and regulating its exposure to surrounding substances. This flexibility connects biological investigation with biomaterial development.
Researchers can examine how encapsulated cells or biomolecules behave within a controlled three-dimensional setting. Observations can be interpreted alongside bead size, porosity, and composition, because these features regulate transport and protection. This makes the system useful for linking material design with biological outcomes in cell studies, enzyme research, and laboratory assays.