Dq Collagen Assay
Dq Collagen Assay - Related Videos
07:25
Collagen Hydrogels
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2023
Collagen is another widely used biomaterial that has found popularity in commercial applications, such as photography. Collagen has more recently been used in tissue engineering applications, by creating hydrogels that provide structure to engineered tissue. This video introduces collagen as a biomaterial, demonstrates how it is harvested from porcine skin, and shows how the material is used to create a hydrogel for tissue engineering applications. Finally, several applications of the material...
10:45
Organotypic Collagen I Assay: A Malleable Platform to Assess Cell Behaviour in a 3-Dimensional Context
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Cited by 105 •
2011
A method is described for the preparation of a 3-dimensional matrix consisting of collagen type I and primary human fibroblasts. This organotypic gel serves as a useful substrate to assess invasive cell migration because it mimics basic features of tissue stroma and is amenable to many forms of microscopy.
08:24
Dissection and Culture of Mouse Dopaminergic and Striatal Explants in Three-Dimensional Collagen Matrix Assays
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Cited by 13 •
2012
Explants from the midbrain dopamine system and striatum are used in a collagen matrix assay for the in vitro analysis of mesostriatal and striatonigral pathway development. In this assay axonal outgrowth and guidance can be manipulated and quantified. It can also be modified for assessing other regions or molecular cues.
11:08
Dissection and Culture of Chick Statoacoustic Ganglion and Spinal Cord Explants in Collagen Gels for Neurite Outgrowth Assays
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Cited by 9 •
2011
We demonstrate how to dissect and culture chick E4 statoacoustic ganglion and E6 spinal cord explants. Explants are cultured under serum-free conditions in 3D collagen gels for 24 hours. Neurite responsiveness is tested with growth factor-supplemented medium and with protein-coated beads.
09:28
Fabrication of Micro-tissues using Modules of Collagen Gel Containing Cells
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Cited by 9 •
2010
Creation of micro-tissues using cylindrical collagen gels, called modules, that contain embedded cells and which surface is coated with endothelial cells.
FAQs
The collagen substrate carries fluorescent dyes in a self-quenched state, so the intact material produces limited fluorescence. Enzymatic cleavage separates the labeled fragments and increases the measured signal. This coupling between substrate breakdown and fluorescence allows collagenase or other proteolytic activity to be tracked through a direct, quantitative readout under the assay conditions.
Fluorescence serves as an indicator of collagen cleavage rather than a general measure of all biological activity. Under consistent assay conditions, greater signal corresponds to greater enzymatic degradation of the labeled substrate. Comparisons are therefore most meaningful when samples, treatments, and disease-associated changes are evaluated using the same measurement conditions.
The substrate can be cleaved by collagenases and by other proteolytic enzymes, so the fluorescence signal reflects collagen-degrading activity rather than automatically identifying one enzyme. Its value lies in comparing activity and supporting characterization of matrix-degrading proteases, including matrix metalloproteinases, within an appropriate biological or experimental context.
A typical workflow uses fluorescently labeled, self-quenched collagen as the substrate, exposes it to a biological sample or proteolytic system, and measures the resulting fluorescence. The signal is then compared across samples or experimental conditions. This sequence links substrate cleavage with an observable readout of collagen-degrading activity.
Researchers can use the assay to compare collagen-degrading activity in the presence or absence of a therapeutic treatment. A treatment-associated change in fluorescence indicates an altered level of collagen breakdown under the tested conditions. This makes the method useful for investigating whether drugs influence extracellular-matrix degradation during therapeutic research.
Collagen degradation contributes to tissue remodeling and can change during disease progression. By quantifying matrix-degrading activity in biological samples, the assay provides a fluorescence-based way to compare collagen turnover across disease-associated conditions. Its results can help connect altered protease activity with extracellular-matrix breakdown in medicine-focused research.