In Situ Zymography
In Situ Zymography - Related Videos
03:05
Fluorescent Peptide Zymography: A Modified Technique to Detect Protease Activity Using Fluorogenic Substrates in Zymogram Gels
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2025
In this video, we perform zymography, an electrophoretic technique, to analyze the proteolytic activity within biological samples.
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.
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.
09:56
Detection of Protease Activity by Fluorescent Peptide Zymography
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Cited by 1 •
2019
Here, we present a detailed protocol for a modified zymographic technique in which fluorescent peptides are used as the degradable substrate in place of native proteins. Electrophoresis of biological samples in fluorescent peptide zymograms enables detection of a wider range of proteases than previous zymographic techniques.
08:00
Whole-Mount In Situ Hybridization
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2023
Whole-mount in situ hybridization (WMISH) is a common technique used for visualizing the location of expressed RNAs in embryos. In this process, synthetically produced RNA probes are first complementarily bound, or "hybridized," to the transcripts of target genes. Immunohistochemistry or fluorescence is then used to detect these RNA hybrids, revealing spatial and temporal patterns of gene expression. Unlike traditional in situ hybridization techniques, which require thin tissue sections whose...
FAQs
The method uses a fluorogenic or chromogenic substrate that changes detectability when an enzyme cleaves it. Because cleavage occurs where the enzyme is active, microscopy records both signal intensity and distribution within the sample. Stronger or more concentrated signals can therefore identify local regions of enzymatic activity, while the pattern shows where that activity is occurring.
In Situ Zymography reports functional substrate cleavage rather than merely showing that an enzyme is present. A region may contain detectable enzyme without producing substantial activity, whereas active enzymes can generate a localized signal through substrate processing. This distinction helps researchers assess where proteases or matrix metalloproteinases are functioning during inflammation, invasion, or tissue remodeling.
Maintaining intact cells, tissues, or microbial environments preserves the anatomical relationships that shape enzyme activity. The resulting signal can be associated with particular tissue regions or cellular neighborhoods instead of being averaged across a disrupted sample. In immunology and infection studies, this spatial context helps connect proteolysis with immune-cell migration, pathogen invasion, and localized tissue damage.
Both substrate types reveal enzymatic cleavage locally, but they produce different detectable outputs. Fluorogenic substrates generate fluorescence, whereas chromogenic substrates generate a visible color signal. The choice determines how enzyme activity is visualized by microscopy and can influence how researchers describe the intensity and distribution of activity within intact biological material.
A basic workflow preserves the biological sample, applies a suitable fluorogenic or chromogenic substrate, and examines the resulting signal by microscopy. Researchers then evaluate where cleavage occurs and how strongly it appears across the sample. This sequence links enzyme function to anatomical location, allowing activity patterns to be compared among cells, tissue regions, or microbial environments.
The technique is useful when researchers need to locate protease or matrix metalloproteinase activity during host-pathogen interactions. Signal patterns can highlight regions associated with immune-cell movement, inflammatory responses, pathogen invasion, or tissue remodeling. By identifying sites of enzymatic activity and possible tissue damage, the method can also help focus investigations of potential therapeutic intervention.