Matrix Metalloproteinases
Matrix Metalloproteinases - Related Videos
09:30
Detection of Functional Matrix Metalloproteinases by Zymography
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Cited by 128 •
2010
This protocol describes an activity-based assay for detecting matrix metalloproteinases in culture supernatants or body fluids.
06:59
Zymography Gel Electrophoresis: An Electrophoretic Technique to Detect Matrix Metalloproteinases by Assessing the Enzymatic Activity
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2025
This video demonstrates the zymography gel electrophoresis technique to assess the activity of matrix metalloproteinases (MMPs) present in cell culture supernatant. The active MMPs degrade the MMP-specific substrate embedded in a polyacrylamide gel, which appears as clear bands against a dark stained background following staining.
07:39
Measuring Global Cellular Matrix Metalloproteinase and Metabolic Activity in 3D Hydrogels
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Cited by 4 •
2019
Here, a protocol is presented for encapsulating and culturing cells in poly(ethylene glycol) (PEG) hydrogels functionalized with a fluorogenic matrix metalloproteinase (MMP)-degradable peptide. Cellular MMP and metabolic activity are measured directly from the hydrogel cultures using a standard microplate reader.
07:32
Bacterial Expression and Purification of Human Matrix Metalloproteinase-3 using Affinity Chromatography
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Cited by 5 •
2022
His-tag purification, dialysis, and activation are employed to increase yields of soluble, active matrix metalloproteinase-3 catalytic domain protein expression in bacteria. Protein fractions are analyzed via SDS-PAGE gels.
01:18
The Bone Matrix
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2025
Bone contains a relatively small number of cells entrenched in a matrix of collagen fibers that provide an adherent surface for inorganic salt crystals. Both components of the matrix, organic and inorganic, contribute to the unusual properties of bone. Without collagen, bones would be brittle and shatter easily. Without mineral crystals, bones would flex and provide little support. This can be observed by an experiment: when the minerals of a bone are dissolved by soaking the bone in acid or...
FAQs
Activation depends on a regulated structural change rather than simply producing more enzyme. MMPs are synthesized as inactive zymogens, and cleavage removes the constraint that masks the catalytic site. Tissue inhibitors of metalloproteinases then help limit activity after activation. In engineered systems, this activation-inhibition balance determines how quickly a material or scaffold undergoes matrix remodeling.
Substrate selectivity gives MMP activity distinct consequences for different matrix environments. Degradation of collagen, elastin, or fibronectin changes the composition and organization of the extracellular matrix rather than causing nonspecific breakdown. For bioengineers, controlling which matrix interactions respond to MMP activity helps connect biochemical remodeling with physical changes that can influence cell movement and tissue development.
They provide a control point for preventing uncontrolled proteolysis. Because MMP activity is regulated by these inhibitors, a scaffold’s remodeling behavior depends not only on whether MMPs are present, but also on how effectively their activity is restrained. Accounting for this balance can help bioengineers design systems that support remodeling without allowing degradation to proceed indiscriminately.
Researchers select a scaffold or material whose degradation responds to MMP activity, then relate that response to the intended biological process. The design goal is to use enzyme-sensitive remodeling to influence cell migration or tissue remodeling. This approach makes matrix turnover a functional feature of the material rather than an uncontrolled background event.
MMP-responsive materials can be designed to participate in the matrix changes associated with wound healing. Their enzyme-sensitive behavior provides a way to coordinate material degradation with local remodeling, while engineered scaffolds can help regulate cell migration. The relevant outcome is not degradation alone, but whether the material supports appropriate tissue remodeling during repair.
They support drug-delivery and tissue-regeneration research in addition to wound-healing applications. By linking material behavior to matrix-degrading activity, these systems let investigators examine how controlled remodeling affects cells and developing tissue. They also provide a bioengineering context for studying dysregulated matrix turnover, which is associated with disease-related changes in extracellular-matrix remodeling.